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Academic literature on the topic 'Dormancy'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 June 2025

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Journal articles on the topic "Dormancy"

Ismaturrahmi, Ismaturrahmi, Hasanuddin Hasanuddin, and Agam Ihsan Hereri. "Teknik pematahan dormansi secara fisik dan kimia terhadap viabilitas benih aren (Arenga pinnata Merr.)." Jurnal Ilmiah Mahasiswa Pertanian 3, no. 4 (2018): 105–12. http://dx.doi.org/10.17969/jimfp.v3i4.9211.

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Abstrak. Penelitian ini bertujuan untuk mengetahui pengaruh teknik pematahan dormansi secara fisik dan kimia, serta nyata tidaknya interaksi antara pematahan dormansi secara fisik dengan pematahan dormansi secara kimia terhadap viabilitas benih aren. Penelitian ini dilaksanakan di Laboratorium Ilmu dan teknologi Benih, Fakultas Pertanian, Universitas Syiah Kuala, Darussalam, Banda Aceh, dari bulan juli sampai November 2017. Penelitian ini menggunakan Rancangan Acak Lengkap (RAL) Pola Faktorial 4 x 4 dengan 3 ulangan. Penelitian ini menggunakan 2 faktor yaitu: pematahan dormansi secara fisik (S), meliputi : (S0) = Tanpa perlakuan fisik, (S1) = Digosok dengan kertas amplas , (S2) = Digores dengan cutter sepanjang punggung benih, dan (S3) = Menghilangkan selaput gabus pada hilum, dan pematahan dormansi secara kimia (K), meliputi: (K0) = Konsentrasi 0% KNO3, (K1) = Konsentrasi 0,3% KNO3, (K2) = Konsentrasi 0,5% KNO3, (K3) = Konsentrasi 0,7% KNO3.Hasil penelitian yang telah dilakukan, dapat diambil kesimpulan bahwa : Kombinasi perlakuan secara fisik yang digores dengan cutter (S2) dengan konsentrasi KNO3 0,5% (K2) merupakan kombinasi perlakuan terbaik untuk pematahan dormanis pada benih aren.Dormancy Breaking Technique by Physical and Chemical Means on Viabitity of Palm Seed (Arenga pinnata Merr.)Abstract. This research aims to know the effect of physics and chemical dormancy breaking technique, and significant or not the interaction between physical dormancy breaking with chemical dormancy breaking on the viability of the palm seeds. This research was conducted in Science and Seed Technology Laboratory, Faculty of Agriculture, Syiah Kuala University, Darussalam, Banda Aceh, from July to November 2017. This research used Factorial Completely Randomize Design with 4 x 4 repeated 3 times. This research uses 2 factors, namely: physical dormancy breaking (S), including: (S0) = Without physical treatment, (S1) = Rubbed with sandpaper, (S2) = scratched with cutter along the back of seed, and (S3) = Eliminate the cork membrane on the hylum, and chemical dormancy breaking (K), namely: (K0) = Concentration 0% KNO3, (K1) = Concentration 0.3% KNO3, (K2) = Concentration 0.5% KNO3, (K3) = Concentration 0.7% KNO3. The results of research that has been done, it can be concluded that : The combination of physical treatment scratched with cutter (S2) with KNO3 concentration of 0.5% (K2) is the best treatment combination for dormanic breaking of palm seeds.

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Kissing Kucek, L., M. D. Azevedo, S. S. Eagen, et al. "Seed Dormancy in Hairy Vetch (Vicia villosa Roth) Is Influenced by Genotype and Environment." Agronomy 10, no. 11 (2020): 1804. http://dx.doi.org/10.3390/agronomy10111804.

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Seed dormancy complicates the agricultural use of many legume species. Understanding the genetic and environmental drivers of seed dormancy is necessary for advancing crop improvement for legumes, such as Vicia villosa. In this study, we quantify the magnitude of genetic and environmental effects on physical dormancy among 1488 maternal V. villosa plants from 18 diverse environments. Furthermore, we explore the relationship between physical dormancy and environmental conditions during seed development. Additive genetic variance (h2) accounted for 40% of the variance, while the growing environment explained 28% of the variance in physical dormancy. Maternal lines showed complete variance in physical dormancy, as one line was 100% dormant, and 56 lines were 0% dormant. Distributions of physical dormancy varied widely among seed production environments, with some site-years strongly skewed toward physically dormant seed, while other site-years exhibited little dormant seed. Twenty-three weather variables were associated with environmental and error effects of physical dormancy. High mean and minimum relative humidity, low mean and maximum temperature, and high precipitation weakly grouped with low physical dormancy. Weather variables calculated from fixed time windows approximating seed maturity to seed harvest at each site-year tended to be less predictive than biological seed drying windows calculated based on seed maturity of each maternal line. Overall, individual and cumulative effects of weather variables were poor predictors of physical dormancy. Moderate heritability indicates that breeding programs can select against physical dormancy and improve V. villosa for agricultural use. Marker-based approaches would maximize selection for physical dormancy by reducing the influence of unpredictable environmental effects.

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Liu, Wenjie, Antal H. Kovacs, and Jinqiang Hou. "Cancer Cells in Sleep Mode: Wake Them to Eliminate or Keep Them Asleep Forever?" Cells 13, no. 23 (2024): 2022. https://doi.org/10.3390/cells13232022.

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Cancer cell dormancy is a critical phase in cancer development, wherein cancer cells exist in a latent state marked by temporary but reversible growth arrest. This dormancy phase contributes to anticancer drug resistance, cancer recurrence, and metastasis. Treatment strategies aimed at cancer dormancy can be categorized into two contradictory approaches: inducing cancer cells into a dormant state or eliminating dormant cells. While the former seeks to establish permanent dormancy, the latter aims at eradicating this small population of dormant cells. In this review, we explore the current advancements in therapeutic methods targeting cancer cell dormancy and discuss future strategies. The concept of cancer cell dormancy has emerged as a promising avenue for novel cancer treatments, holding the potential for breakthroughs in the future.

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Haile, Teketel A., and Steven J. Shirtliffe. "Effect of Harvest Timing on Dormancy Induction in Canola Seeds." Weed Science 62, no. 3 (2014): 548–54. http://dx.doi.org/10.1614/ws-d-13-00178.1.

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Seedbank persistence in canola seeds is related to their potential to develop secondary dormancy. This can result in volunteer weed problems many years after canola production. The potential to be induced into secondary dormancy is controlled by both the canola genetics and the environment of the mother plant. However, the effect of time of harvesting on secondary dormancy potential is not known. The objective of this study was to determine the effect of harvest timing on potential to develop seed dormancy in canola. Six harvest samples were collected weekly from two canola genotypes (5440 and 5020) starting from 10 to 20% seed color change on the main stem until they were fully ripened. Freshly harvested seeds of 5440 and 5020 showed 13 and 16% primary dormancy at 32 and 33 d after flowering (DAF), respectively, but dormancy decreased with harvest timings and no dormancy was observed when seeds were fully mature (78 DAF). After dormancy induction, 10% of 5440 seeds were dormant at 32 DAF, but 94% of seeds were dormant at 78 DAF. Similarly, 70% of 5020 seeds were dormant at 33 DAF, but 90% of seeds were dormant at 68 DAF. Thus, seeds had lower potential to secondary dormancy at early development but have a high potential to secondary dormancy induction at full maturity. This study suggests that windrowing these canola genotypes at the recommended time (60% seed color change on the main stem) may reduce ability of the seed to develop secondary dormancy and thus reduce the persistence of seeds in the soil seedbank.

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Hasimi, Muhammad Hasbi, Eva Agustina, Nur Yohaniz Miskiah, Muhammad Ihsan Fadhiel, Nadia Nadia, and Gani Jawak. "Pematahan dormansi benih cabai lokal tiung tanjung asal tabalong Kalimantan Selatan." Jurnal AGRO 11, no. 1 (2024): 133–46. http://dx.doi.org/10.15575/35866.

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Tiung Tanjung seeds pepper are believed to have dormant properties that can be detrimental to farmers during planting. The aim of this study was to find out the correct method of breaking the dormancy on Tiung Tanjung pepper. The study was designed with a two-stage nested design, the first stage was the seed storage time of 1, 3, 5, 7, 9, and 11 weeks. The second stage was a dormant breakdown method consisting of 8 treatments namely control, aquades, warm water (40 °C), ionic water, IAA 100 ppm, IAA 200 ppm, KNO3 0,1% and KNO3 0.5%. Each unit of experiment used 3 repetitions with 25 seeds planted using Top of Paper method (TP). Parameters observed were the vigor index, growth speed, germination,maximum germination potential, fresh seed, seed mortality rate, and growth performance. The results of the study showed that the treatment of Tiung pepper seed immersed in 0.5% KNO3 for 24 hours was able to break the dormancy at 7 weeks after storage with germination values increased to 80%. Treatment with 0.1% KNO3 could break the dormancy in the 9th week. Dormancy breakdown treatments with aquades, warm water (40 °C), ionic water, IAA 100 ppm, and IAA 200 ppm had not been able to break the dormancy of Tiung pepper seeds up to 11 weeks of storage. Benih cabai Tiung Tanjung diyakini memiliki sifat dormansi yang dapat merugikan petani saat penanaman. Tujuan dari penelitian ini adalah untuk mengetahui metode pematahan dormansi yang tepat pada cabai Tiung Tanjung. Penelitian dilaksanakan dengan rancangan tersarang dua tingkat, tingkat pertama adalah lama masa simpan benih yaitu 1, 3, 5, 7, 9, dan 11 minggu simpan dan tingkat kedua adalah metode pematahan dormansi yang terdiri dari 8 perlakuan yaitu kontrol, akuades, air hangat (40 °C), air ion, IAA 100 ppm, IAA 200 ppm, KNO3 0,1% dan KNO3 0,5%. Setiap satuan percobaan menggunakan 3 ulangan. Setiap ulangan menggunakan 25 benih yang ditanam dengan metode uji di atas kertas (UDK). Parameter yang diamati adalah indeks vigor, kecepatan tumbuh, daya berkecambah, potensi tumbuh maksimum, benih segar tidak tumbuh, dan tingkat kematian benih, dan performa kecambah. Hasil penelitian menunjukkan bahwa perlakuan perendaman benih cabai Tiung dalam KNO3 0,5% selama 24 jam mampu mematahkan dormansi pada 7 minggu setelah simpan dengan nilai daya berkecambah mencapai 80%. Perlakuan dengan KNO3 0,1% dapat mematahkan dormansi pada minggu ke-9. Perlakuan pematahan dormansi dengan akuades, air hangat (40 °C), air ion, IAA 100 ppm dan IAA 200 ppm belum mampu mematahkan dormansi benih cabai Tiung hingga 11 minggu simpan.

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Kehl, Kassiana, Ivan Carvalho, Deivid Sacon, et al. "Characterization of Brazilian black oat genotypes regarding seed dormancy." DELOS: DESARROLLO LOCAL SOSTENIBLE 16, no. 48 (2023): 3337–53. http://dx.doi.org/10.55905/rdelosv16.n48-023.

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The objective of this work was to characterize 30 black oat genotypes regarding seed dormancy. The experiment was carried out in the 2018 and 2019 seasons in a completely randomized design with three factors, being 30 black oat genotypes, two methods of seed germination analysis (with and without dormancy breaking) and five evaluation periods (0, 30, 60, 90 and 120 days after harvest), distributed in four replicates. In each postharvest period, the variables: normal seedlings, abnormal seedlings, number of dormant seeds and number of dead seeds were analyzed. There was significant interaction between factors during the two years of experimentation. In the 2018 season, the percentage of dormant seeds at period zero ranged from 47 to 3% in the method with overcoming dormancy, 86 to 33% in the method without overcoming dormancy. The genotypes ALPHA 1629 and IAPAR 61- Ibiporã presented highest dormancy. In the 2019 season, the percentage of dormant seeds at period zero ranged from 56 to 3% with overcoming dormancy and 85 to 12% without overcoming dormancy. There is variability of dormancy among genotypes and this is overcome after 60 days of harvest. The IAPAR 61-Ibiporã genotype have highest of dormancy seeds.

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Qaderi, Mirwais M. "Environmental Regulation of Weed Seed Dormancy and Germination." Seeds 2, no. 3 (2023): 259–77. http://dx.doi.org/10.3390/seeds2030020.

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Many weeds produce dormant seeds that are unable to complete germination under favourable conditions. There are two types of seed dormancy: primary dormancy (innate dormancy), in which seeds are in a dormant state upon release from the parent plant, and secondary dormancy (induced dormancy), in which dormancy develops in seeds through some experience after release from the parent plant. Mechanisms of seed dormancy are categorized as embryo dormancy and coat-imposed dormancy. In embryo dormancy, the control of dormancy resides within the embryo itself, and in coat-imposed dormancy, it is maintained by the structures enclosing the embryo. Many factors can influence seed dormancy during development and after dispersal; they can be abiotic, biotic, or a combination of both. Most weeds deposit a large number of seeds in the seed bank, which can be one of two types—transient or persistent. In the transient type, all viable seeds in the soil germinate or die within one year, and there is no carry-over until a new crop is deposited. In the persistent type, at least some seeds survive in the soil for more than one year and there is always some carry-over until a new crop is deposited. Some dormant seeds require after-ripening—changes in dry seeds that cause or improve germination. Nondormant, viable seeds can germinate if they encounter appropriate conditions. In the face of climate change, including global warming, some weeds produce a large proportion of nondormant seeds, which germinate shortly after dispersal, and a smaller, more transient seed bank. Further studies are required to explore this phenomenon.

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Tseng, Te-Ming, Vinod K. Shivrain, Amy Lawton-Rauh, and Nilda R. Burgos. "Dormancy-linked Population Structure of Weedy Rice (Oryza sp.)." Weed Science 66, no. 3 (2018): 331–39. http://dx.doi.org/10.1017/wsc.2017.86.

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AbstractSeed dormancy allows weedy rice (Oryza sp.) to persist in rice production systems. Weedy and wild relatives of rice (Oryza sativa L.) exhibit different levels of dormancy, which allows them to escape weed management tactics, increasing the potential for flowering synchronization, and therefore gene flow, between weedy Oryza sp. and cultivated rice. In this study, we determined the genetic diversity and divergence of representative dormant and nondormant weedy Oryza sp. groups from Arkansas. Twenty-five simple sequence repeat markers closely associated with seed dormancy were used. Four populations were included: dormant blackhull, dormant strawhull, nondormant blackhull, and nondormant strawhull. The overall gene diversity was 0.355, indicating considerable genetic variation among populations in these dormancy-related loci. Gene diversity among blackhull populations (0.398) was higher than among strawhull populations (0.245). Higher genetic diversity was also observed within and among dormant populations than in nondormant populations. Cluster analysis of 16 accessions, based on Nei’s genetic distance, showed four clusters. Clusters I, III, and IV consisted of only blackhull accessions, whereas Cluster II comprised only strawhull accessions. These four clusters did not separate cleanly into dormant and nondormant populations, indicating that not all markers were tightly linked to dormancy. The strawhull groups were most distant from blackhull weedy Oryza sp. groups. These data indicate complex genetic control of the dormancy trait, as dormant individuals exhibited higher genetic diversity than nondormant individuals. Seed-dormancy trait contributes to population structure of weedy Oryza sp., but this influence is less than that of hull color. Markers unique to the dormant populations are good candidates for follow-up studies on the control of seed dormancy in weedy Oryza sp.

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Buijs, Gonda. "A Perspective on Secondary Seed Dormancy in Arabidopsis thaliana." Plants 9, no. 6 (2020): 749. http://dx.doi.org/10.3390/plants9060749.

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Primary seed dormancy is the phenomenon whereby seeds newly shed by the mother plant are unable to germinate under otherwise favorable conditions for germination. Primary dormancy is released during dry seed storage (after-ripening), and the seeds acquire the capacity to germinate upon imbibition under favorable conditions, i.e., they become non-dormant. Primary dormancy can also be released from the seed by various treatments, for example, by cold imbibition (stratification). Non-dormant seeds can temporarily block their germination if exposed to unfavorable conditions upon seed imbibition until favorable conditions are available. Nevertheless, prolonged unfavorable conditions will re-induce dormancy, i.e., germination will be blocked upon exposure to favorable conditions. This phenomenon is referred to as secondary dormancy. Relative to primary dormancy, the mechanisms underlying secondary dormancy remain understudied in Arabidopsis thaliana and largely unknown. This is partly due to the experimental difficulty in observing secondary dormancy in the laboratory and the absence of established experimental protocols. Here, an overview is provided of the current knowledge on secondary dormancy focusing on A. thaliana, and a working model describing secondary dormancy is proposed, focusing on the interaction of primary and secondary dormancy.

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Seshu, D. V., and M. Dadlani. "Mechanism of seed dormancy in rice." Seed Science Research 1, no. 3 (1991): 187–94. http://dx.doi.org/10.1017/s0960258500000854.

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AbstractDormancy in rice (Oryza sativa L.) seed is imposed by certain physical and chemical factors associated with its covering structures, i.e.hull and pericarp. The nature of these germination blocks, their mode ofaction, and processes regulating the release of dormancy are not fully understood. Of nine rice cultivars studied, Ching-shi 15, Stejaree 45, PTB10, and Mahsuri are weakly dormant, and Bansphul, Benaful, Kataktara, Dular, and N22 are dormant. Release of seed dormancy in rice by various treatments, oxidative processes and enzymic changes associated with dormancy, and parallelism between natural and artificially imposed dormancy patterns were examined. The influence of the hull in imposing dormancy was stronger and more prolonged than that of the pericarp. Application of GA3 was effective in inducing germination only in weakly dormant cultivars. Dormancy was completely released in all cultivars by subjecting the seeds to moist heat treatment, by removing the hull and pericarp, and by applying GA3 after dehulling. Dormant cultivars had higher O2 uptake rate and peroxidase activity and lower amylase and dehydrogenase activities than the weakly dormant ones. Hull removal substantially decreased peroxidase activity but enhanced amylase and dehydrogenase activities. Nonanoic acid (C90), a short-chain saturated fatty acid (SCSFA), when exogenously applied to non-dormant seeds imposed dormancy. Dry heat treatment or presoaking in 0.01 m KNO3 or 0.1 m H2O2 was very effective in releasing SCSFA-imposed dormancy. Amylase activity was greatly reduced by treatments with nonanoic acid (C90) or ABA. Considering earlier reports and results of the present study, it is proposed that seed dormancy in rice is regulated both by the presence of SCSFAs and ABA in the hull and the pericarp. The relative significance of these substances in cultivars of tropical and temperate origins and its implications in terms of ecogeographic adaptability are discussed.

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More sources

Dissertations / Theses on the topic "Dormancy"

Xia, Qiong. "Molecular aspects of temperature regulation of sunflower seed dormancy." Thesis, Paris 6, 2016. http://www.theses.fr/2016PA066629/document.

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La graine est le produit de la reproduction sexuée chez les Angiospermes. Elle assure la survie et la dispersion de l'espèce. La germination des graines est la première étape de la croissance des plantes. La transition entre l'état de dormance des graines et leur germination est une étape clef dans le cycle de vie des plantes qui a des conséquences écologique et commerciale. Depuis plusieurs décennies, de nombreux facteurs de l'environnement ont été étudiés pour leurs implications et leurs conséquences dans le processus de dormance et de germination des graines. Les études sur la réponse des semences aux changements de température en liens avec le réchauffement climatique ont un intérêt primordial. Le but de ce travail a été d'étudier la régulation de la dormance et de la germination des graines de tournesol par la température. Une analyse protéomique et un profilage enzymatique ont été réalisés afin de mieux comprendre la régulation du métabolisme pendant la levée de dormance par la température. L'utilisation d'approches moléculaires et cytologiques, nous ont permis d'appréhender l'interaction entre la température et les phytohormones impliquées dans ce processus. Nos résultats ont révélé le rôle joué par la température comme facteur externe affectant la dormance et la germination des graines en agissant d'une part sur le métabolisme et d'autre part sur la quantité et la localisation cellulaire des principales hormones endogènes<br>A seed is the product of sexual reproduction and the means by which the new individual is dispersed by angiosperms. Seed germination being the first step of plant establishment, the ultimate role of the transition between seed dormancy and germination during plant lifecycle is an important ecological and commercial trait. Last several decades, several environment factors have been reviewed to strongly effect the process of seed dormancy and germination. However, studies about seed response to temperature change are acute with the global warming. The aim of this work was to investigate temperature regulation of dormancy and germination in sunflower seeds. Proteomic analysis and enzyme profiling have been used to study metabolism regulation during seed dormancy release by temperature. Moreover, using molecular and cytological approaches, we investigate the interaction between temperature and phytohormones involved in this process. Our results revealed that temperature as an external factor to effect seed dormancy and germination by affecting, in one hand, the metabolism, and in the other hand the level and localization of major endogenous hormones

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Xia, Qiong. "Molecular aspects of temperature regulation of sunflower seed dormancy." Electronic Thesis or Diss., Paris 6, 2016. https://accesdistant.sorbonne-universite.fr/login?url=https://theses-intra.sorbonne-universite.fr/2016PA066629.pdf.

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Li, L. "Enzymic changes during dormancy breakage." Thesis, University of Reading, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.379772.

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Musselwhite, Sheri Ruth. "Overcoming Summer Dormancy of Boxwood." Thesis, Virginia Tech, 2002. http://hdl.handle.net/10919/42177.

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The objective of this work was to determine if summer dormancy of boxwood could be removed either through nutritional or hormonal means. Buxus sempervirens L. â Suffruticosaâ , B. sempervirens â Vardar Valleyâ , and B sinica var. insularis (Nakai) â Justin Brouwersâ were used for these studies. In the nutrition study, experiments were conducted to examine the effects of various levels of Osmocote 15-9-12 and liquid 10-4-6 on growth of boxwood. Optimal shoot dry weight was achieved at applications of 12 to 16 g Osmocote and 100 â 150 ppm N liquid fertilizer. Leachate EC corresponding to optimal shoot dry weight ranged from 0.5 to 0.7 dS/m for Osmocote and from 0.7 to 1.5 dS/m for liquid fertilizer. While the fertilizer requirements for boxwood optimal dry weight accumulation were determined, additional flushes of growth subsequent to the initial spring flush did not occur for â Vardar Valleyâ and English boxwood. In the phytohormone study, experiments were conducted that examined the effects of pruning, Promalin (GA4+7 and BA), and defoliation on the growth of three boxwood species. While Promalin applied alone or in conjunction with pruning shows promise of increasing new shoot growth, its response was not consistent from experiment to experiment. In fact, when it was applied in conjunction with defoliation, it dramatically decreased number of new shoots and actually resulted in some shoot mortality. Pruning was also erratic in its promotion of new shoots. Defoliation increased new shoot number dramatically and shows the most promise in overcoming summer dormancy.<br>Master of Science

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Browning, Luke Wayne. "StCKP and potato tuber dormancy." Thesis, University of Cambridge, 2018. https://www.repository.cam.ac.uk/handle/1810/275074.

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Nasiruddin, Khondoker Md. "Potato microtubers : their formation and dormancy." Thesis, Imperial College London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.284943.

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Basbouss-Serhal, Isabelle. "Role of mRNA post-transcriptional metabolism in the regulation of Arabidopsis thalian dormancy." Thesis, Paris 6, 2015. http://www.theses.fr/2015PA066147/document.

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Rôle du métabolisme post-transcriptionnel des ARNm dans la régulation de la dormance des semences d’Arabidopsis thaliana.Une étude physiologique nous a permis d'identifier l'influence de la température et de l'humidité relative (HR) lors du stockage des graines dormantes d’Arabidopsis. Après une levée de dormance atteinte en 7 semaines avec des cinétiques variables selon les conditions, on observe une induction de la dormance secondaire à faible HR et une perte progressive de la viabilité à forte HR. La levée et l’induction de la dormance sont associées à la régulation de gènes liés aux voies de l'acide abscissique et des gibbérellines. Nous avons étudié la dynamique d’association des ARNm aux polysomes et comparé la transcription et la traduction des graines dormantes et non dormantes au cours de l’imbibition. Nous montrons qu'il n'y a pas de corrélation entre transcriptome et traductome et que la régulation de la germination est principalement liée à la traduction. Ceci suppose un recrutement sélectif et dynamique des ARNm liés aux polysomes dans les graines dormantes et non dormantes. Certaines caractéristiques de la région 5'UTR des transcrits semble impliquées dans la sélection des ARNm traduits pendant la germination. Les phénotypes de mutants d’éléments du catabolisme des ARN montrent que la dormance est également associée à une dégradation sélective des ARNm. Les P-bodies (localisés dans des lignées YFP-DCP1) sont d’ailleurs en quantité plus importante dans les graines non-dormantes. La comparaison des transcriptomes des mutants vcs-8 et xrn4-5 a permis l'identification de plusieurs transcrits dégradés via VCS ou XRN4, dont le rôle sur la dormance a été confirmé par génétique inverse. Certains motifs spécifiques semblent être impliqués dans la sélection de transcrits pour leur dégradation<br>Role of mRNA post-transcriptional metabolism in the regulation of Arabidopsis thaliana dormancy.A physiological study allowed us to reveal the effect of temperature and relative humidity (RH) during Arabidopsis seed storage. Seven weeks of after ripening lead to alleviation of dormancy with different kinetics according to the conditions. Longer storage induced an induction of secondary dormancy at low RH and progressive loss of viability at high RH. Dormancy release and induction of secondary dormancy were associated with induction or repression of key genes related to abscissic acid and gibberellins pathways. We have studied the dynamics of mRNAs association with polysomes and compared transcriptome and translatome of dormant and non-dormant seeds. There was no correlation between transcriptome and translatome and germination regulation is largely translational, implying a selective and dynamic recruitment of mRNAs to polysomes in both dormant and non-dormant seeds. Some identified 5'UTR features could play a role in this selective. Dormancy is also associated with mRNA decay as demonstrated by phenotyping mutants altered in mRNA metabolism. Moreover we have shown that P-bodies were more abundant in non-dormant seeds that in dormant ones. Transcriptome analysis of xrn4-5 and vcs-8 mutants allowed us to identify several transcripts degraded via VCS ou XRN4 proteins, having a role in dormancy. This role was confirmed by reverse genetics for some of them. Some specific motifs were identified as involved in mRNA decay selection

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Lachabrouilli, Anne-Sophie. "Etude des mécanismes impliqués dans la mise en place et l'expression de la dormance des semences de tournesol." Electronic Thesis or Diss., Sorbonne université, 2019. http://www.theses.fr/2019SORUS619.

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A la récolte, les semences de tournesol (Helianthus annuus L.) sont dormantes et germent difficilement. Les objectifs de ce travail étaient de caractériser l’influence des facteurs génétiques et environnementaux sur la dormance des akènes de tournesol, de sa mise en place pendant le développement à son élimination après la récolte, et d’identifier des marqueurs moléculaires de la dormance. Deux essais agronomiques, mis en place en 2016 et en 2017 avec 2 génotypes, ont permis de mettre en évidence le rôle des facteurs génétiques ainsi que l’effet majeur de la vitesse de déshydratation des semences sur la plante mère sur l’intensité de la dormance à la récolte. L’ensemble de ces données nous a permis de proposer un modèle prédictif de l’intensité de la dormance à la récolte en intégrant des données environnementales. En complément, le transcriptome et le traductome des semences issues des deux génotypes et dont l’intensité de dormance à la récolte était différente, ont été étudiés. Cette analyse a permis de souligner que la dormance est un phénomène actif au niveau moléculaire et que sa régulation serait liée à une sélection différentielle des transcrits à traduire. Ce travail a permis d’identifier des marqueurs moléculaires de la dormance. Après la récolte, la dormance s’élimine progressivement au cours du stockage. Nos résultats montrent que la vitesse d’élimination est fortement modulée par les conditions de stockage (température et humidité relative de l’atmosphère) et le niveau de dormance initial des semences. En revanche nous ne mettons pas en évidence une composante génétique dans ce phénomène, qui semble donc strictement dépendre des conditions environnementales<br>Freshly harvested sunflower seeds (Helianthus annuus L.) are dormant and poorly germinate. The aim of this study was to characterize the influence of genetic and environmental factors on the dormancy of sunflower achenes, from its establishment during seed development to its elimination after harvest, and eventually to identify molecular markers of dormancy. Two agronomic trials set up in 2016 and 2017 using two genotypes, highlighted the role of genetic factors and pointed towards a major effect of the seed dehydration rate, while they are still on the mother plant, on the degree of dormancy upon harvest. All these results allowed us to propose a predictive model of the dormancy intensity at harvest by integrating environmental data. In addition, the transcriptome and translatome of two genotypes displaying differences with the intensity of dormancy at harvest during the agronomic trials were further studied. Theses analyses show that dormancy is an active phenomenon at the molecular level and that is regulation should be linked to a differential selection of transcript for translation. These results lead to the identification of molecular markers of dormancy enabling the establishment of protocols designed to rapidly detect dormancy. Since dry storage is known to progressively alleviate dormancy, our results further showed that this process is strictly modulated by the storage conditions (temperature and relative humidity of the atmosphere) and the initial level of seed dormancy. On the other hand, there was no evidence suggesting that the genetic component, which seems to be strictly dependent on environmental conditions, could be involved in this phenomenon

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Tavakkol, Afshari Reza. "Variation in seed dormancy of tetraploid wheat." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp03/NQ37916.pdf.

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Dilawari, Mridull. "Genetic Characterization of Dormancy in Durum Wheat." Diss., North Dakota State University, 2012. https://hdl.handle.net/10365/26476.

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Two populations derived by crossing LDN x LDN Dic-3A (Population I) and LDN x LDN Dic-3B (Population II) were genetically characterized for the seed dormancy present on chromosome 3A and 3B of durum wheat. The genes for seed dormancy in these two populations were contributed by the wild parent T. dicoccoides. Although the populations showed transgressive segregants for both dormant as well as nondormant parent, the populations were similar to the dormant parent at Langdon and Prosper 2006 field locations for Population I and at Langdon 2007 and Autumn greenhouse season for Population II. Genotypic and phenotypic analysis over the combined populations showed an environmental effect on expression of the trait. Different QTL were identified for both field and greenhouse season for the population derived from the cross between LDN x LDN Dic-3A. Five QTL for seed dormancy were identified on chromosome 3A for the QTL analysis performed over combined field locations. One QTL ranging between marker interval Xcfa2193 and Xcfd2a was consistently present for the 30 day period of seed germination and was also found to be linked to red grain color trait. The QTL analysis performed on the population derived from the cross between LDN x LDN Dic-3B identified only one major QTL on the long arm of chromosome 3B between the marker interval Xbarc84 and Xwmc291. This QTL was consistently present for all the field and spring greenhouse season for the seed germination period of 30 days. The QTL x E effect was also observed for this QTL, however it was very small.

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Books on the topic "Dormancy"

Bradbeer, J. W. Seed dormancy and germination. Blackie, 1988.

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Bradbeer, J. W. Seed dormancy and germination. Blackie Academic & Professional, 1988.

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Kermode, Allison R., ed. Seed Dormancy. Humana Press, 2011. http://dx.doi.org/10.1007/978-1-61779-231-1.

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Kawakami, Naoto, and Kazuhiro Sato, eds. Seed Dormancy. Springer US, 2024. http://dx.doi.org/10.1007/978-1-0716-3965-8.

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Montagner, Marco, ed. Cancer Cell Dormancy. Springer US, 2024. http://dx.doi.org/10.1007/978-1-0716-3882-8.

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Wang, Yuzhuo, and Francesco Crea, eds. Tumor Dormancy and Recurrence. Springer International Publishing, 2017. http://dx.doi.org/10.1007/978-3-319-59242-8.

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Anderson, James V., ed. Advances in Plant Dormancy. Springer International Publishing, 2015. http://dx.doi.org/10.1007/978-3-319-14451-1.

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Bradbeer, J. W. Seed Dormancy and Germination. Springer US, 1988. http://dx.doi.org/10.1007/978-1-4684-7747-4.

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Bradbeer, J. W. Seed Dormancy and Germination. Springer Netherlands, 1988. http://dx.doi.org/10.1007/978-94-011-6574-7.

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Eitan, Yefenof, and Scheuermann Richard H, eds. Premalignancy and tumor dormancy. Springer, 1996.

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Book chapters on the topic "Dormancy"

Arteca, Richard N. "Dormancy." In Plant Growth Substances. Springer US, 1996. http://dx.doi.org/10.1007/978-1-4757-2451-6_6.

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Hodek, I. "Dormancy." In Ecology of Coccinellidae. Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-017-1349-8_7.

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Folkman, Judah. "Dormancy." In Encyclopedia of Cancer. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-642-27841-9_1709-3.

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Folkman, Judah. "Dormancy." In Encyclopedia of Cancer. Springer Berlin Heidelberg, 2014. http://dx.doi.org/10.1007/978-3-662-46875-3_1709.

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Folkman, Judah. "Dormancy." In Encyclopedia of Cancer. Springer Berlin Heidelberg, 2011. http://dx.doi.org/10.1007/978-3-642-16483-5_1709.

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Fenner, Michael. "Dormancy." In Seed Ecology. Springer Netherlands, 1985. http://dx.doi.org/10.1007/978-94-009-4844-0_5.

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Copeland, Larry O., and Miller B. McDonald. "Seed Dormancy." In Principles of Seed Science and Technology. Springer US, 1999. http://dx.doi.org/10.1007/978-1-4615-1783-2_6.

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Copeland, Lawrence O., and Miller B. McDonald. "Seed Dormancy." In Principles of Seed Science and Technology. Springer US, 2001. http://dx.doi.org/10.1007/978-1-4615-1619-4_7.

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Hodek, Ivo. "Diapause/Dormancy." In Ecology and Behaviour of the Ladybird Beetles (Coccinellidae). John Wiley & Sons, Ltd, 2012. http://dx.doi.org/10.1002/9781118223208.ch6.

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Moses, Marsha A. "Tumor Dormancy." In Encyclopedia of Systems Biology. Springer New York, 2013. http://dx.doi.org/10.1007/978-1-4419-9863-7_1549.

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Conference papers on the topic "Dormancy"

Fessler, R. R., and K. Krist. "Research Challenges regarding Stress-Corrosion Cracking of Pipelines." In CORROSION 2000. NACE International, 2000. https://doi.org/10.5006/c2000-00370.

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Abstract While much progress has been made toward understanding stress-corrosion cracking (SCC) of line-pipe steels, a number of unresolved issues merit further research. Even under well-controlled conditions in the laboratory, crack growth rate varies considerably with time, and many cracks appear to become dormant. Determining the reasons for dormancy and reactivation of dormant cracks is critical to life prediction. In high-pH environments, the threshold stress for SCC has been related to cyclic strain-hardening behavior. The relationship between cyclic strain-hardening behavior and microstructure as affected by steel composition and processing would foster the development of SCC-resistant steels. Whether the same relationship holds for near-neutral-pH SCC also should be determined. While hydrogen appears to be important for near-neutral-pH SCC, its role has not been explained, nor is the role of dissolution clearly understood. Recommendations for research to address those issues are offered along with some thoughts about the mechanisms of initiation and growth in near-neutral-pH SCC.

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Owen, Micheal D. K. "Weed Seed Dormancy and Germination." In Proceedings of the First Annual Crop Production and Protection Conference. Iowa State University, Digital Press, 1991. http://dx.doi.org/10.31274/icm-180809-360.

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Abdo, Jacques Bou, Imad Sarji, Imad H. Elhajj, Ali Chehab, and Ayman Kayssi. "Application-Aware Fast Dormancy in LTE." In 2014 IEEE 28th International Conference on Advanced Information Networking and Applications (AINA). IEEE, 2014. http://dx.doi.org/10.1109/aina.2014.28.

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Chodosh, Lewis A. "Abstract IA11: Tumor dormancy and recurrence." In Abstracts: Fourth AACR International Conference on Frontiers in Basic Cancer Research; October 23-26, 2015; Philadelphia, PA. American Association for Cancer Research, 2016. http://dx.doi.org/10.1158/1538-7445.fbcr15-ia11.

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"Dormancy regulation of hematopoietic stem cell." In Биоинформатика регуляции и структуры геномов / системная биология. ИЦиГ СО РАН, 2024. http://dx.doi.org/10.18699/bgrs2024-1.2-12.

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Malasheva, Petya, Valentin Kazandjiev, and Veska Georgieva. "PECULIARITIES IN THE INITIAL STAGES OF DEVELOPMENT FOR SOME FRUIT TREES, DEPENDING ON THE TEMPERATURE CONDITIONS." In 22nd SGEM International Multidisciplinary Scientific GeoConference 2022. STEF92 Technology, 2022. http://dx.doi.org/10.5593/sgem2022/4.1/s19.45.

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The last decade has been characterized by an increased frequency of climatic anomalies and their amplitude. These anomalies affect the productivity of crops and orchards, which is directly dependent on agro-meteorological conditions. The registered tendencies to change the hydrothermal conditions in the different regions of the country sometimes are a risk factor for their productivity, especially in the initial phenological stages of the development of the fruit trees. Bud dormancy on the fruit trees from the temperate zones is a phase of development that occurs annually and enables trees to survive cold winters. To estimate the chill requirements of orchards, besides temperature data, three chronological dates must be defined: the chill accumulation start date, the deep dormancy breaking date, and the date of eco dormancy end. This study aims to assess the thermal conditions in the initial stages of development of some stone fruit plants grown in Bulgaria. There were analyzed the conditions during the deep dormancy in the orchards and the permanent transition of the average daily temperature above 5�C. Chilling requirements for breaking dormancy were studied for some peach, cherry, and apricot cultivars, located in the regions for industrial producing of these plants. The Utah chilling unit model was used to measure the accumulation of chilling requirements.

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Chodosh, L. "Abstract ES5-1: Tumor dormancy and recurrence." In Abstracts: 2018 San Antonio Breast Cancer Symposium; December 4-8, 2018; San Antonio, Texas. American Association for Cancer Research, 2019. http://dx.doi.org/10.1158/1538-7445.sabcs18-es5-1.

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Lin, Rongde, Jianqing Xi, and Yubin Guo. "Dormancy and Spatial Logic of Mobile Ambients." In 2008 Fifth International Conference on Fuzzy Systems and Knowledge Discovery (FSKD). IEEE, 2008. http://dx.doi.org/10.1109/fskd.2008.262.

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Batyrshina, Yana, and Yakov Schwartz. "New in vitro model of Mycobacterium tuberculosis dormancy." In ERS International Congress 2020 abstracts. European Respiratory Society, 2020. http://dx.doi.org/10.1183/13993003.congress-2020.2810.

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Kaajakari, Ville, Shyi-Herng Kan, Li-Jen Lin, Amit Lal, and M. Steven Rodgers. "Ultrasonic actuation for MEMS dormancy-related stiction reduction." In Micromachining and Microfabrication, edited by Russell A. Lawton. SPIE, 2000. http://dx.doi.org/10.1117/12.395709.

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Reports on the topic "Dormancy"

Or, Etti, David Galbraith, and Anne Fennell. Exploring mechanisms involved in grape bud dormancy: Large-scale analysis of expression reprogramming following controlled dormancy induction and dormancy release. United States Department of Agriculture, 2002. http://dx.doi.org/10.32747/2002.7587232.bard.

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The timing of dormancy induction and release is very important to the economic production of table grape. Advances in manipulation of dormancy induction and dormancy release are dependent on the establishment of a comprehensive understanding of biological mechanisms involved in bud dormancy. To gain insight into these mechanisms we initiated the research that had two main objectives: A. Analyzing the expression profiles of large subsets of genes, following controlled dormancy induction and dormancy release, and assessing the role of known metabolic pathways, known regulatory genes and novel sequences involved in these processes B. Comparing expression profiles following the perception of various artificial as well as natural signals known to induce dormancy release, and searching for gene showing similar expression patterns, as candidates for further study of pathways having potential to play a central role in dormancy release. We first created targeted EST collections from V. vinifera and V. riparia mature buds. Clones were randomly selected from cDNA libraries prepared following controlled dormancy release and controlled dormancy induction and from respective controls. The entire collection (7920 vinifera and 1194 riparia clones) was sequenced and subjected to bioinformatics analysis, including clustering, annotations and GO classifications. PCR products from the entire collection were used for printing of cDNA microarrays. Bud tissue in general, and the dormant bud in particular, are under-represented within the grape EST database. Accordingly, 59% of the our vinifera EST collection, composed of 5516 unigenes, are not included within the current Vitis TIGR collection and about 22% of these transcripts bear no resemblance to any known plant transcript, corroborating the current need for our targeted EST collection and the bud specific cDNA array. Analysis of the V. riparia sequences yielded 814 unigenes, of which 140 are unique (keilin et al., manuscript, Appendix B). Results from computational expression profiling of the vinifera collection suggest that oxidative stress, calcium signaling, intracellular vesicle trafficking and anaerobic mode of carbohydrate metabolism play a role in the regulation and execution of grape-bud dormancy release. A comprehensive analysis confirmed the induction of transcription from several calcium–signaling related genes following HC treatment, and detected an inhibiting effect of calcium channel blocker and calcium chelator on HC-induced and chilling-induced bud break. It also detected the existence of HC-induced and calcium dependent protein phosphorylation activity. These data suggest, for the first time, that calcium signaling is involved in the mechanism of dormancy release (Pang et al., in preparation). We compared the effects of heat shock (HS) to those detected in buds following HC application and found that HS lead to earlier and higher bud break. We also demonstrated similar temporary reduction in catalase expression and temporary induction of ascorbate peroxidase, glutathione reductase, thioredoxin and glutathione S transferase expression following both treatments. These findings further support the assumption that temporary oxidative stress is part of the mechanism leading to bud break. The temporary induction of sucrose syntase, pyruvate decarboxylase and alcohol dehydrogenase indicate that temporary respiratory stress is developed and suggest that mitochondrial function may be of central importance for that mechanism. These finding, suggesting triggering of identical mechanisms by HS and HC, justified the comparison of expression profiles of HC and HS treated buds, as a tool for the identification of pathways with a central role in dormancy release (Halaly et al., in preparation). RNA samples from buds treated with HS, HC and water were hybridized with the cDNA arrays in an interconnected loop design. Differentially expressed genes from the were selected using R-language package from Bioconductor project called LIMMA and clones showing a significant change following both HS and HC treatments, compared to control, were selected for further analysis. A total of 1541 clones show significant induction, of which 37% have no hit or unknown function and the rest represent 661 genes with identified function. Similarly, out of 1452 clones showing significant reduction, only 53% of the clones have identified function and they represent 573 genes. The 661 induced genes are involved in 445 different molecular functions. About 90% of those functions were classified to 20 categories based on careful survey of the literature. Among other things, it appears that carbohydrate metabolism and mitochondrial function may be of central importance in the mechanism of dormancy release and studies in this direction are ongoing. Analysis of the reduced function is ongoing (Appendix A). A second set of hybridizations was carried out with RNA samples from buds exposed to short photoperiod, leading to induction of bud dormancy, and long photoperiod treatment, as control. Analysis indicated that 42 genes were significant difference between LD and SD and 11 of these were unique.

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Ginzburg, Chen, and Lawrence Rappaport. Regulation of Corm Dormancy. United States Department of Agriculture, 1985. http://dx.doi.org/10.32747/1985.7587718.bard.

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Tran, David. Breaking Cancer Dormancy to Sensitize Dormant Breast Cancer Cells to Cytotoxic Chemotherapy. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada567338.

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Griffith, Linda, and Alan Wells. Escape from Tumor Cell Dormancy. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada570303.

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Wells, Alan, and Linda Griffith. Escape from Tumor Cell Dormancy. Defense Technical Information Center, 2012. http://dx.doi.org/10.21236/ada573776.

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Griffith, Linda, and Alan Wells. Escape from Tumor Cell Dormancy. Defense Technical Information Center, 2011. http://dx.doi.org/10.21236/ada555804.

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Bruce. L52090 Near-Neutral pH SCC - Dormancy and Re-Initiation of Stress Corrosion Cracks. Pipeline Research Council International, Inc. (PRCI), 2003. http://dx.doi.org/10.55274/r0011360.

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The objective of this research project was to identify the environmental, metallurgical, and mechanical conditions that lead to dormancy and re-initiation of previously dormant stress corrosion cracks. These parameters would assist pipeline operators in mitigating near-neutral pH SCC on their systems, and allocating resources for pipeline maintenance. Unload-reload transients were found to increase the crack growth rate in the majority of the experiments and to re-initiate dormant stress corrosion cracks in several cases. On the other hand, there was no consistent effect of the presence or magnitude of overloads on crack growth behavior. The simulated hydrostatic tests had relatively little effect on the crack velocities for near dormant conditions, but consistently inhibited subsequent crack growth for actively growing cracks. The results of analyses of the data and modeling suggest that the R ratio (ratio of minimum to maximum pressure) and frequency of pressure fluctuations on an operating pipeline can be used as a tool to rank segments of pipelines base on the mechanical driving force for propagation of near neutral pH SCC. The concept of a critical crack tip strain rate, which can be related to the R ratio and frequency, also can be used to reasonably predict whether a given set of loading conditions will lead to dormancy.

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Zheng. L52044 Effects of Operating Practice on Crack Dormancy and Growth. Pipeline Research Council International, Inc. (PRCI), 2005. http://dx.doi.org/10.55274/r0011334.

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This report describes the output of two phases of the research contract on �Effects of Operating Practice on SCC Crack Growth�, GRI-05/8668, submitted to PRCI in August 2002 (Phase I) and in July 2003 (Phase II). The objective of the first phase of the work was to identify, through literature survey, a correlation model that relates the crack growth rate in low-pH or in high-pH environments to the deformation rate of the line pipe steel. The objective of the second phase of the project was to experimentally validate the correlation model(s) identified in Phase I. The ultimate goal of this work is to define the critical loading condit ions necessary for SCC so that operating practices can be assessed for the purpose of eventual avoidance of SCC. It is also hoped that such a deformation-rate-based model can provide insight for understanding the transition between �active� and �inactive� (or dormant) states of the cracking that is often observed in laboratory SCC tests. Understanding the causes for dormancy of stress corrosion cracks and the mechanism(s) of crack reactivation has significant practical implications. Service life is extended if conditions of dormancy can be maintained and conditions of growth or reactivation can be avoided.

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Schedin, Pepper. Identifying ECM Mediators of Tumor Cell Dormancy. Defense Technical Information Center, 2008. http://dx.doi.org/10.21236/ada486610.

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Aubry, Sylvie. The dormancy phase in LIGA micro-gears. Office of Scientific and Technical Information (OSTI), 2003. http://dx.doi.org/10.2172/811183.

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Academic literature on the topic 'Dormancy'

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Journal articles on the topic "Dormancy"

Dissertations / Theses on the topic "Dormancy"

Books on the topic "Dormancy"

Book chapters on the topic "Dormancy"

Conference papers on the topic "Dormancy"

Reports on the topic "Dormancy"