Bibliografias temáticas / Abiotic stress factors

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Literatura científica selecionada sobre o tema "Abiotic stress factors"

Autor: Grafiati

Publicado: 9 de setembro de 2021

Última modificação: 1 de fevereiro de 2022

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Artigos de revistas sobre o assunto "Abiotic stress factors"

Gujjar, Ranjit Singh, Moin Akhtar e Major Singh. "Transcription factors in abiotic stress tolerance". Indian Journal of Plant Physiology 19, n.º 4 (4 de novembro de 2014): 306–16. http://dx.doi.org/10.1007/s40502-014-0121-8.

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Brini, Faiçal, e Walid Saibi. "Oxidative stress and antioxidant defense in Brassicaceae plants under abiotic stresses". SDRP Journal of Plant Science 5, n.º 1 (2021): 232–44. http://dx.doi.org/10.25177/jps.5.1.ra.10694.

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Brassicaceae plants, as an important source of primary and secondary metabolites, are becoming a research model in plant science. Plants have developed different ways to ward off environmental stress factors. This is lead to the activation of various defense mechanisms resulting in a qualitative and/or quantitative change in plant metabolite production. Reactive oxygen species (ROS) is being continuously produced in cell during normal cellular processes. Under stress conditions, there are excessive production of ROS causing progressive oxidative damage and ultimately cell death. Despite their destructive activity, ROS are considered as important secondary messengers of signaling pathway that control metabolic fluxes and a variety of cellular processes. Plant response to environmental stress depends on the delicate equilibrium between ROS production, and their scavenging. This balance of ROS level is required for performing its dual role of acting as a defensive molecule in signaling pathway or a destructive molecule. Efficient scavenging of ROS produced during various environmental stresses requires the action of several non-enzymatic as well as enzymatic antioxidants present in the tissues. In this review, we describe the ROS production and its turnover and the role of ROS as messenger molecules as well as inducers of oxidative damage in Brassicaceae plants. Further, the antioxidant defense mechanisms comprising of enzymatic and non-enzymatic antioxidants have been discussed. Keywords: Abiotic stress, Antioxidant defence, Brassicaceae, Oxidative stress, ROS

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Bray, Elizabeth A. "Physiology of plants under stress: Abiotic factors". Field Crops Research 55, n.º 1-2 (janeiro de 1998): 192–93. http://dx.doi.org/10.1016/s0378-4290(97)00069-5.

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Yoon, Youngdae, Deok Hyun Seo, Hoyoon Shin, Hui Jin Kim, Chul Min Kim e Geupil Jang. "The Role of Stress-Responsive Transcription Factors in Modulating Abiotic Stress Tolerance in Plants". Agronomy 10, n.º 6 (1 de junho de 2020): 788. http://dx.doi.org/10.3390/agronomy10060788.

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Abiotic stresses, such as drought, high temperature, and salinity, affect plant growth and productivity. Furthermore, global climate change may increase the frequency and severity of abiotic stresses, suggesting that development of varieties with improved stress tolerance is critical for future sustainable crop production. Improving stress tolerance requires a detailed understanding of the hormone signaling and transcriptional pathways involved in stress responses. Abscisic acid (ABA) and jasmonic acid (JA) are key stress-response hormones in plants, and some stress-responsive transcription factors such as ABFs and MYCs function as direct components of ABA and JA signaling, playing a pivotal role in plant tolerance to abiotic stress. In addition, extensive studies have identified other stress-responsive transcription factors belonging to the NAC, AP2/ERF, MYB, and WRKY families that mediate plant response and tolerance to abiotic stress. These suggest that transcriptional regulation of stress-responsive genes is an essential step to determine the mechanisms underlying plant stress responses and tolerance to abiotic stress, and that these transcription factors may be important targets for development of crops with enhanced abiotic stress tolerance. In this review, we briefly describe the mechanisms underlying plant abiotic stress responses, focusing on ABA and JA metabolism and signaling pathways. We then summarize the diverse array of transcription factors involved in plant responses to abiotic stress, while noting their potential applications for improvement of stress tolerance.

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Tran, Lam-Son Phan, e Keiichi Mochida. "Identification and prediction of abiotic stress responsive transcription factors involved in abiotic stress signaling in soybean". Plant Signaling & Behavior 5, n.º 3 (março de 2010): 255–57. http://dx.doi.org/10.4161/psb.5.3.10550.

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Nakashima, Kazuo, Hironori Takasaki, Junya Mizoi, Kazuo Shinozaki e Kazuko Yamaguchi-Shinozaki. "NAC transcription factors in plant abiotic stress responses". Biochimica et Biophysica Acta (BBA) - Gene Regulatory Mechanisms 1819, n.º 2 (fevereiro de 2012): 97–103. http://dx.doi.org/10.1016/j.bbagrm.2011.10.005.

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Schmidt-Heydt, Markus, Naresh Magan e Rolf Geisen. "Stress induction of mycotoxin biosynthesis genes by abiotic factors". FEMS Microbiology Letters 284, n.º 2 (julho de 2008): 142–49. http://dx.doi.org/10.1111/j.1574-6968.2008.01182.x.

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Li, Chaonan, Carl K. Y. Ng e Liu-Min Fan. "MYB transcription factors, active players in abiotic stress signaling". Environmental and Experimental Botany 114 (junho de 2015): 80–91. http://dx.doi.org/10.1016/j.envexpbot.2014.06.014.

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Li, Weixing, Siyu Pang, Zhaogeng Lu e Biao Jin. "Function and Mechanism of WRKY Transcription Factors in Abiotic Stress Responses of Plants". Plants 9, n.º 11 (8 de novembro de 2020): 1515. http://dx.doi.org/10.3390/plants9111515.

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The WRKY gene family is a plant-specific transcription factor (TF) group, playing important roles in many different response pathways of diverse abiotic stresses (drought, saline, alkali, temperature, and ultraviolet radiation, and so forth). In recent years, many studies have explored the role and mechanism of WRKY family members from model plants to agricultural crops and other species. Abiotic stress adversely affects the growth and development of plants. Thus, a review of WRKY with stress responses is important to increase our understanding of abiotic stress responses in plants. Here, we summarize the structural characteristics and regulatory mechanism of WRKY transcription factors and their responses to abiotic stress. We also discuss current issues and future perspectives of WRKY transcription factor research.

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Yermukhambetova, R. Zh, A. Zh Dogabayev, A. A. Bari e Zh K. Masalimov. "Oxidative stress response in plants to combined abiotic and biotic stress factors". BULLETIN of the L.N. Gumilyov Eurasian National University. BIOSCIENCE Series 122, n.º 1 (2018): 48–53. http://dx.doi.org/10.32523/2616-7034-2018-122-1-48-53.

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Mais fontes

Teses / dissertações sobre o assunto "Abiotic stress factors"

Chambers, David L. "Abiotic Factors Underlying Stress Hormone Level Variation Among Larval Amphibians". Diss., Virginia Tech, 2009. http://hdl.handle.net/10919/27817.

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Anthropogenic disturbances can alter the abiotic composition of freshwater systems. These compositional changes can act as physiological stressors towards system inhabitants. However, little is known about how these altered abiotic factors influence stress hormones (corticosterone) in larval amphibians. Throughout the following chapters, I examined the effects of several abiotic factors on baseline and stress-induced corticosterone levels in the larvae of four amphibian species: Jefferson salamander (Ambystoma jeffersonianum), spotted salamander (A. maculatum), wood frog (Rana sylvatica), and grey treefrog (Hyla versicolor). Chapter II examined corticosterone level differences throughout development in A. jeffersonianum and R. sylvatica larvae under field, mesocosm, and laboratory venues. Baseline corticosterone levels in R. sylvatica increased near metamorphic climax in all venues, but not in A. jeffersonianum. Rather, baseline corticosterone levels differed with respect to venue throughout development in A. jeffersonianum. Chapter III examined corticosterone level differences among free-living A. jeffersonianum populations and possible abiotic factors underlying these hormone differences. Corticosterone levels significantly differed across populations. Increased baseline corticosterone levels significantly correlated to low pH. There was also a trend for increased baseline corticosterone levels to be positively correlated with chloride levels and negatively correlated with conductivity. Chapter IV examined the effects of laboratory manipulated pH on corticosterone levels in A. jeffersonianum, A. maculatum, R. sylvatica, and H. versicolor. There was a significant correlation between increased baseline corticosterone levels to low pH in all four species. Prey consumption (in both Ambystoma species) and survival (in A. jeffersonianum, A. maculatum, and R. sylvatica) were also negatively correlated to low pH. Chapter V examined the effects of increased conductivity on corticosterone levels in A. jeffersonianum, R. sylvatica, and H. versicolor. Increased conductivity exposure significantly correlated to increased baseline corticosterone levels in A. jeffersonianum and R. sylvatica. Prey consumption in A. jeffersonianum was also negatively correlated to increased conductivity. My dissertation shows that abiotic factors, such as pH and conductivity, can influence corticosterone levels in larval amphibians. These results suggest that corticosterone levels in larval amphibians may be a suitable biomarker reflective of altered freshwater habitat quality. However, my results also suggest that one should use a high degree of caution when using corticosterone levels in larval amphibians as a means to infer the health status of a population.
Ph. D.

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Vieira, Natacha Cristiana dos Santos. "Identification of transcription factors regulating cork oak UNK1 gene during abiotic stress response". Master's thesis, ISA/UL, 2017. http://hdl.handle.net/10400.5/13961.

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Mestrado em Engenharia Agronómica - Protecção das Plantas - Instituto Superior de Agronomia - UL
O sobreiro (Quercus suber L.) é uma árvore autóctone do Mediterrâneo que desempenha um papel-chave no seu ecossistema. A relevância económica da espécie, aliada ao seu declínio populacional, tanto devido a ameaças biológicas (ex.: P. cinnamomi), como abióticas (ex.: calor e secura), levaram a um acrescido interesse nesta árvore. Num projecto anterior (SuberStress) do laboratório de acolhimento foram selecionados 10 genes diferencialmente expressos em diferentes stresses aplicados separadamente, entre eles QsUNK1, de função desconhecida. Para a caracterização de QsUNK1 foram inicialmente determinadas as sequências genómica (2264pb com três intrões de 819, 486 e 506pb) e do promotor (identificados 1220pb). Por “Yeast-1-Hybrid” (Y1H) identificaram-se cinco potenciais factores de transcrição (TFs) por rastreio de uma biblioteca de cDNAs de stresse abiótico (calor e secura) com “baits” de levedura contendo parte do promotor (-797 a -260pb). Para a validação funcional deste gene utilizaram-se duas linhas descritas como mutantes no gene homólogo em Arabidopsis (AT3G55646). Plântulas de Arabidopsis (selvagens e mutantes) e plantas de sobreiro foram sujeitas a ensaios de calor, por choque ou aclimatação. Por análise da expressão em sobreiro, verificou-se indução de QsUNK1 em ambas as condições de stresse. Em Arabidopsis, AtUNK1 não revelou variações de expressão claras, pelo que o gene não está a ser silenciado. Igualmente não se confirmou o “knockout” nas duas linhas analisadas. Para validar a ligação TF-promotor e efectuar estudos funcionais, foram desenvolvidas linhas embriogénicas de sobreiro
N/A

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Baloglu, Mehmet Cengiz. "Expression Analysis Of Nac Type Transcription Factors On Wheat Seedlings Under Abiotic Stress Conditions". Phd thesis, METU, 2011. http://etd.lib.metu.edu.tr/upload/12613501/index.pdf.

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Wheat is the most important grain crop grown in our country providing greatest part of the daily nutritional requirement. Abiotic factors including salinity, drought, cold and heat stresses affect quality and yield of wheat varieties used for the production of both bread and pasta flour. NAC proteins form one of the widest families of plant specific transcription factors. Members of this family are related with development, defense and abiotic stress responses. TaNAC69-1 and TtNAM-B2 genes were isolated from T.aestivum and T.turgidum, respectively. Then they were cloned into different monocot and dicot expression vectors to be used for further wheat and tobacco genetic transformation studies. To understand effects of salinity, drought, cold and heat stresses on expression profiles of TaNAC69-1 and TtNAM-B2 genes, quantitative real time PCR was performed. The time series expression profiles of TaNAC69-1 show that it was signi

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Maclear, Athlee. "Identification of cis-elements and transacting factors involved in the abiotic stress responses of plants". Thesis, Rhodes University, 2005. http://hdl.handle.net/10962/d1007236.

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Many stress situations limit plant growth, resulting in crop production difficulties. Population growth, limited availability and over-utilization of arable land, and intolerant crop species have resulted in tremendous strain being placed on agriculturalists to produce enough to sustain the world's population. An understanding of the principles involved in plant resistance to environmental stress will enable scientists to harness these mechanisms to create stress-tolerant crop species, thus increasing crop production, and enabling the farming of previously unproductive land. This research project uses computational and bioinformatics techniques to explore the promoter regions of genes, encoding proteins that are up- or down-regulated in response to specific abiotic stresses, with the aim of identifying common patterns in the cis-elements governing the regulation of these abiotic stress responsive genes. An initial dataset of fifty known genes encoding for proteins reported to be up- or down-regulated in response to plant stresses that result in water-deficit at the cellular level viz. drought, low temperature, and salinity, were identified, and a postgreSQL database created to store relevant information pertaining to these genes and the proteins encoded by them. The genomic DNA was obtained where possible, and the promoter and intron regions identified. The Neural Network Promoter Prediction (NNPP) software package was used to predict the transcription start signal (TSS) and the promoter searching software tool, TESS (Transcription Element Search Software) used to identify known and user-defined cis-elements within the promoter regions of these genes. Currently available promoter prediction software analysis tools are reported to predict one promoter per kilobase of DNA, whilst functional promoters are thought to only occur one in 30-40 kilobases, which indicates that a large perccntage of predictions are likely to be false positives (pedersen et. al., 1999). NNPP was chosen as it was rated as the highest performing promoter prediction software tool by Fickett and Hatzigeorgiou (1997) in a thorough review of eukaryotic promoter prediction algorithms, however results were less than promising as very few predicted TSS were identified in the area 50 bps up- and downstream of the gene start site, where biologically functional TSSs are known to occur (Reese, 2000; Fickett and Hatzigeorgiou, 1997). TESS results seemed to support the hypothesis that drought, low-temperature and high salinity plant stress response proteins have similar as-elements in their promoter regions, and suggested links to various other gene regulation mechanisms viz. gibberellin-, light-, auxin- and development-regulated gene expression, highlighting the vast complexity of plant stress response processes. Although far from conclusive, results provide a valuable basis for future comparative promoter studies that will attempt to deduce possible common transcriptional initiation of abiotic stress response genes.
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Oliveira, Catarina Chemetova Cravo Branco de. "Influence of abiotic stress factors on VOCs emission from Portuguese rice paddy fields: relation with increased climate change". Master's thesis, Faculdade de Ciências e Tecnologia, 2013. http://hdl.handle.net/10362/10736.

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Dissertação para obtenção do Grau de Mestre em Engenharia do Ambiente Perfil de Gestão de Sistemas Ambientais
Plants are emitting chemical-signals to the atmosphere in response to stress factors - Volatile Organic Compounds (VOCs). VOCs have higher influence on atmosphere chemistry: they are acting as photochemical precursors in tropospheric ozone formation. Present work studies VOCs emission released by rice (Oryza sativa L cv. Aríete) cycle in paddy fields, in aleatory schemes with three replicates, in two separate soil plots with different textures (silty clay and loamy sand), studying open field conditions and open top chambers (OTCs) under influence of treatments with induced abiotic stress (increase temperature and simultaneously temperature and CO2 atmospheric concentration enhancement). VOCs were extracted from plant by solid phase micro extraction (SPME) and stem distillation extraction (SDE), and analyzed by gas chromatography coupled to mass spectrometry (GC/MS) using two GC capillary columns with different polarities, one non-polar (DB-5) and other polar (DB-WAX). A total of 33 VOCs using a non-polar column and 22 VOCs using a polar column, in both set of results were identified the three main classes of compounds: green leaf volatiles (GLV), monoterpenes and sesquiterpenes. Between rice cycle VOCs vary their trend and on vegetative stage were observed more VOCs, followed by ripening and lesser on reproductive. Silty clay soil demonstrated higher amount of VOCs released if compared with loamy sand texture. Between OTCs, more compounds were released by increasing temperature than simultaneously temperature and CO2. In Intergovernmental Panel for Climate Change (IPCC) scenarios with emergent trend of increasing temperature and CO2 atmospheric concentration, two effects are inherent to rice VOCs emission, one negative with higher emission related with temperature and other positive with less emission associated CO2. Field data measurements addictions in air quality models will help achievements of realistic previsions and better understand the effect of climate change in air quality on a global scale.
Portuguese Foundation for Science and Technology; FCT-UNL and partners from INIAV and UTAD, on a project named PTDC/AGR-AAM/102529/2008

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Lohscheider, Jens Nikolaus [Verfasser]. "The molecular impacts of abiotic stress factors on photosynthesis in cyanobacteria and higher plants / Jens Nikolaus Lohscheider". Konstanz : Bibliothek der Universität Konstanz, 2010. http://d-nb.info/1024853594/34.

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Xu, Duorong [Verfasser], e Tatjana [Akademischer Betreuer] Kleine. "The contribution of extrachloroplastic factors and plastid gene expression to chloroplast development and abiotic stress tolerance / Duorong Xu ; Betreuer: Tatjana Kleine". München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2020. http://d-nb.info/1216039232/34.

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Adam, Muhammed Saleem. "A knowledgebase of stress reponsive gene regulatory elements in arabidopsis Thaliana". Thesis, University of the Western Cape, 2011. http://etd.uwc.ac.za/index.php?module=etd&action=viewtitle&id=gen8Srv25Nme4_9599_1362393100.

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Stress responsive genes play a key role in shaping the manner in which plants process and respond to environmental stress. Their gene products are linked to DNA transcription and its consequent translation into a response product. However, whilst these genes play a significant role in manufacturing responses to stressful stimuli, transcription factors coordinate access to these genes, specifically by accessing a gene&rsquo
s promoter region which houses transcription factor binding sites. Here transcriptional elements play a key role in mediating responses to environmental stress where each transcription factor binding site may constitute a potential response to a stress signal. Arabidopsis thaliana, a model organism, can be used to identify the mechanism of how transcription factors shape a plant&rsquo
s survival in a stressful environment. Whilst there are numerous plant stress research groups, globally there is a shortage of publicly available stress responsive gene databases. In addition a number of previous databases such as the Generation Challenge Programme&rsquo
s comparative plant stressresponsive gene catalogue, Stresslink and DRASTIC have become defunct whilst others have stagnated. There is currently a single Arabidopsis thaliana stress response database called STIFDB which was launched in 2008 and only covers abiotic stresses as handled by major abiotic stress responsive transcription factor families. Its data was sourced from microarray expression databases, contains numerous omissions as well as numerous erroneous entries and has not been updated since its inception.The Dragon Arabidopsis Stress Transcription Factor database (DASTF) was developed in response to the current lack of stress response gene resources. A total of 2333 entries were downloaded from SWISSPROT, manually curated and imported into DASTF. The entries represent 424 transcription factor families. Each entry has a corresponding SWISSPROT, ENTREZ GENBANK and TAIR accession number. The 5&rsquo
untranslated regions (UTR) of 417 families were scanned against TRANSFAC&rsquo
s binding site catalogue to identify binding sites. The relational database consists of two tables, namely a transcription factor table and a transcription factor family table called DASTF_TF and TF_Family respectively. Using a two-tier client-server architecture, a webserver was built with PHP, APACHE and MYSQL and the data was loaded into these tables with a PYTHON script. The DASTF database contains 60 entries which correspond to biotic stress and 167 correspond to abiotic stress while 2106 respond to biotic and/or abiotic stress. Users can search the database using text, family, chromosome and stress type search options. Online tools have been integrated into the DASTF
database, such as HMMER, CLUSTALW, BLAST and HYDROCALCULATOR. User&rsquo
s can upload sequences to identify which transcription factor family their sequences belong to by using HMMER. The website can be accessed at http://apps.sanbi.ac.za/dastf/ and two updates per year are envisaged.

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Guérin, Claire. "Analyse des facteurs de transcription de la famille NAC chez le blé tendre (Triticum aestivum L.) et leur implication dans la réponse à des stress abiotiques". Thesis, Université Clermont Auvergne‎ (2017-2020), 2019. http://www.theses.fr/2019CLFAC014/document.

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Le blé tendre, Triticum aestivum, est une des céréales les plus cultivées dans le monde. Le changement climatique qui se développe actuellement contraint fortement les cultures et altère leur rendement. La compréhension des mécanismes de réponse du blé tendre aux stress abiotiques est donc une problématique d’actualité. Plusieurs grandes familles de facteurs de transcription, dont la famille NAC,interviennent dans le développement de la plante et dans sa réponse aux stress environnementaux. Cette thèse, structurée en 3 volets, est ciblée sur l’étude de la famille NAC chez le blé tendre : les TaNAC. Dans un premier temps, nous avons étudié la structuration génomique et phylogénétique des 488 membres de la famille TaNAC, recensés à partir de la base de données la plus récente du blé tendre.Nous avons aussi étudié l’histoire évolutive de cette famille, qui a été marquée par des événements de duplication et de rétroposition. Enfin, une analyse de sa diversité allélique a permis d’identifier des gènes qui présentent des SNP montrant une forte association avec des paramètres d’accumulation des protéines de réserve dans le grain. Le deuxième chapitre de cette thèse a porté sur l’étude de l’expression de ces 488 gènes TaNAC dans plusieurs organes et en réponse aux stress thermique et sécheresse. Une analyse globale a été réalisée à partir de données bio-informatiques, suivie d’une étude in planta de l’expression d’une sélection de 23 gènes. Les profils d’expression obtenus ont révélé l’existence de 4 gènes TaNAC, encore jamais décrits dans la littérature et qui interviennent dans le développement du grain de blé tendre mais aussi dans sa réponse adaptative à plusieurs stress abiotiques. Le troisième volet de cette thèse a donc porté sur la caractérisation génétique, moléculaire et physiologique de ces 4 facteurs de transcription TaNAC. Ils appartiennent à un clade rassemblant des séquences présentant des similitudes génomique et structurale. De plus, ils sont localisés dans le noyau et leurs profils d’expression sont similaires, avec toutefois un niveau variable entre gènes et entre homéologues pour chaque gène. En réponse à un stress thermique modéré, ce profil d’expression est accéléré au cours du développement du grain ; le stade 120°Cj étant le stade clé qui montre la plus grande différence d’expression de ces gènes entre les conditions contrôle et stressée. Pour des raisons techniques, la production de plantes transgéniques sur- et sous-exprimant ces gènes n’a pas permis de valider l’implication de ces 4 TaNAC dans le développement du grain et en réponse à la température. Une analyse de génétique d’association a toutefois permis de mettre en évidence un lien entre des marqueurs moléculaires situés dans ces gènes et l’accumulation des protéines de réserve.Globalement, les résultats obtenus ont montré que des membres de la famille TaNAC sont impliqués dans le développement du blé tendre et dans sa réponse aux stress abiotiques. Plus particulièrement, 4 facteurs de transcription TaNAC semblent jouer un rôle clé dans l’accumulation des protéines dans le grain en réponse à un stress thermique modéré
Bread wheat, Triticum aestivum, is one of the most cultivated cereal in the world. The climate change that is currently developing strongly constrains crops and impairs their yield. Understanding the wheat response mechanisms to abiotic stresses is therefore a current issue. Several major families of transcription factors, including the NAC family, are involved in the plant development and its response to environmental stresses. This thesis, structured in three parts, is focused on the study of the NAC family in bread wheat (TaNAC).First, we studied the genomic and phylogenetic structure of the 488 members of the TaNAC family identified from the latest database of bread wheat. We also studied the evolutionary history of this family, which was marked by duplication and retroposition events. Finally, an analysis of its allelic diversity allows us to identify genes with SNP showing a strong association with storage protein accumulation parameters in the grain. In a second part, we studied the expression of these 488 TaNAC genes in several organs and in response to heat and drought. An overall analysis was performed using bioinformatic data, followed by an in planta study of the expression of a selection of 23 genes. The expression profiles revealed that four TaNAC genes, never described in the literature, are involved in the wheat grain development but also in its adaptive response to several abiotic stresses. In a third part, we focused on the genetic, molecular and physiological characterization of these four TaNAC transcription factors. They belong to a clade gathering sequences with genomic and structural similarities. Moreover, they are localized in the nucleus and their expression profiles are similar, with a variable level between genes and between homeologs for each gene. In response to moderate heat stress, this expression profile is accelerated during grain development and a key stage at 120°Cj was identified, it shows the greatest difference in genes expression level between control and stressed conditions. For technical reasons, the production of transgenic plants over- and under-expressing these genes did not validate the involvement of these 4 TaNAC in grain development and in its temperature response. An association genetic analysis, however, showed a link between molecular markers located in these genes and the storage proteins accumulation. Overall, the results showed that members of the TaNAC family are involved in the bread wheat development and its response to abiotic stresses. In particular, four TaNAC transcription factors appear to play a key role in grain protein accumulation in response to a moderate heat stress

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Ployet, Raphaël. "Régulation de la formation du bois chez l'eucalyptus lors du développement et en réponse à des contraintes environnementales". Thesis, Toulouse 3, 2017. http://www.theses.fr/2017TOU30094/document.

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Du fait de sa croissance exceptionnelle combinée aux propriétés supérieures de son bois, l'Eucalyptus est devenu le feuillu le plus planté au monde et s'est imposé comme source de biomasse pour la production de papier et de biocarburants de seconde génération. Le bois est composé de parois secondaires lignifiées et sa formation est finement régulée par un réseau complexe, et globalement mal connu, de facteurs de transcription (FT). Les parois secondaires sont composées de 80% de polysaccharides, ciblés pour la plupart des bioproduits à haute valeur ajoutée, tandis que la lignine (20%) est responsable de la récalcitrance de la biomasse à la dégradation enzymatique mais augmente le potentiel énergétique du bois par combustion. Malgré son adaptabilité remarquable à différents sols et climats, la croissance de l'Eucalyptus varie fortement suivant ces facteurs. L'Eucalyptus est largement planté sur des sols lessivés dans les régions tropicales et subtropicales où les plantations industrielles font face à des épisodes de sécheresse de plus en plus fréquents, en combinaison avec des forts manques de nutriments, nécessitant de gros apports en fertilisants. Dans les région tempérées telles que l'Europe du Nord, la principale limitation à l'implantation de cet arbre dépourvu d'endodormance, est l'exposition au froid. Ces contraintes abiotiques sont aggravées par le changement climatique et leur impact sur la formation du bois et sa qualité restent peu documentés. Quelques données suggèrent que ces stress affectent le dépôt de la paroi secondaire ainsi que la structure du xylème. Cependant, ces résultats sont très hétérogènes entre différentes espèces et principalement focalisés sur des tissus différents du bois. La sélection de clones adaptés et le développement de pratiques culturales plus viables, sont essentiels pour améliorer la productivité et la qualité du bois, ce qui requiert une meilleure compréhension de la réponse des arbres au froid et au manque d'eau en interaction avec la nutrition. Dans le but de décrypter les régulations induites par le froid dans la différenciation du xylème, nous avons effectué une approche ciblée sur des Eucalyptus acclimatés au froid. Des analyses de biochimie, d'histochimie et de transcriptomique, ont révélé que le froid déclenche un dépôt de paroi secondaire précoce dans les cellules du xylème en développement, caractérisé par un fort dépôt de lignine. En parallèle, pour caractériser l'effet du manque d'eau combiné à différents régimes nutritifs, sur la formation et la qualité du bois, nous avons tiré profit d'un dispositif expérimental mis en place au champ avec un clone commercial d'Eucalyptus, soumis à une exclusion de pluie combinée à une fertilisation au potassium. Nous avons combiné des analyses globales du transcriptome et du métabolome, avec l'analyse des propriétés structurales et biochimiques du bois. L'approche intégrative de ces jeux de données a révélé que la fertilisation au potassium induit une répression de la biosynthèse de la paroi secondaire ainsi qu'une régulation de l'activité cambiale et la modification dans les propriétés du bois, avec une forte interaction avec l'exclusion d'eau. Ces deux approches ont permis l'identification de différents FT non caractérisés qui constituent des candidats prometteurs dans le contrôle de l'activité cambiale et du dépôt de paroi secondaire chez un ligneux. Leur caractérisation fonctionnelle chez le peuplier et l'Eucalyptus a révélé un nouveau régulateur clé de la biosynthèse de paroi secondaire, et plusieurs facteurs MYB potentiellement impliqués dans la balance entre formation de la paroi secondaire et croissance
Due to its outstanding growth combined to superior wood properties, Eucalyptus genus has become the most planted hardwood on earth and emerged as the most appealing sources of renewable biomass feedstock for paper and second-generation biofuels. Wood is composed of lignified secondary cell walls (SCWs) and its formation is tightly regulated by a complex, partially unknown, transcription factors (TFs) network. SCWs are composed by 80% of polysaccharides targeted for most of value-added bioproducts, whereas lignin (20%) is responsible for biomass recalcitrance to enzymatic degradation but increase wood energetic potential for combustion. Despite its remarkable adaptability to various soils and climate environment Eucalyptus growth varies strongly according to these factors. Eucalyptus is extensively grown in highly weathered soils in tropical and subtropical regions where plantations are facing more frequent drought episodes in combination to nutrient starvation, requiring high amounts of expensive fertilizers. In temperate regions such as North of Europe, the main limitation for the expansion of this non-dormant tree is cold exposure, which reduces dramatically its growth. The effects of these stresses are emphasized in the actual context of climate change which induces sharp contrasting periods, and their impacts on wood formation and quality remain unknown. Scarce data from literature suggest that these stresses affect secondary cell wall (SCW) deposition as well as xylem cell patterning. However these results are highly heterogeneous among different species and mainly focused on non-woody tissues. The selection of adapted clones and the development of more sustainable cultural practices are crucial to improve wood productivity and quality, which require a better understanding of tree response to cold and water stress in interaction with nutrition. In order to unravel the regulation of xylem differentiation by low temperature, we performed a targeted approach on cold-acclimated Eucalyptus trees. By biochemical, histochemical and transcriptomic analyses, we revealed that low temperature trigger a precocious SCW deposition in developing xylem cells, characterized by a strong lignin deposition. In parallel, we aimed to characterize the effect of water stress combined to different mineral nutrition regimes, on wood formation and quality. To this end, we took advantage of an experimental design set up on field with a highly productive Eucalyptus commercial clone submitted to both rainfall exclusion combined to potassium fertilization. We combined large scale analyses of transcriptome and metabolome, with wood structural and biochemical properties analyses. The integrative approach with these datasets revealed that potassium fertilization induces a repression of SCW biosynthesis, together with regulation of cambial activity and modifications in wood properties, with a strong interaction with water exclusion. Both approaches allowed to point out several uncharacterized yet TFs which are highly promising candidates in the control of cambial activity and SCW deposition in a woody perennial. Characterization of their function in poplar and Eucalyptus revealed a new key regulator of SCW biosynthesis in wood, and several MYB TFs potentially involved in the trade-off between SCW biosynthesis and growth

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Livros sobre o assunto "Abiotic stress factors"

Hemantaranjan, A. Physiology of plants under abiotic stress and climate change. Jodhpur: Scientific Publishers (India), 2012.

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Wani, Shabir Hussain. Transcription Factors for Abiotic Stress Tolerance in Plants. Elsevier Science & Technology Books, 2020.

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Transcription Factors for Abiotic Stress Tolerance in Plants. Elsevier, 2020. http://dx.doi.org/10.1016/c2018-0-04538-7.

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Wani, Shabir Hussain. Transcription Factors for Abiotic Stress Tolerance in Plants. Elsevier Science & Technology, 2020.

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Capítulos de livros sobre o assunto "Abiotic stress factors"

Nakashima, Kazuo, e Kazuko Yamaguchi-Shinozaki. "Promoters and Transcription Factors in Abiotic Stress-Responsive Gene Expression". In Abiotic Stress Adaptation in Plants, 199–216. Dordrecht: Springer Netherlands, 2009. http://dx.doi.org/10.1007/978-90-481-3112-9_10.

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Ijaz, Munazza, Roshina Shahzadi, Muhammad Shareef Masoud, Muhammad Iqbal, Issayeva Akmaral Umirbekovna e Mahmood-ur-Rahman. "Transcription Factors and Plant Abiotic Stress Responses". In Plant Ecophysiology and Adaptation under Climate Change: Mechanisms and Perspectives I, 663–87. Singapore: Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-2156-0_23.

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Woodrow, Pasqualina, Giovanni Pontecorvo, Loredana F. Ciarmiello, Maria Grazia Annunziata, Amodio Fuggi e Petronia Carillo. "Transcription Factors and Genes in Abiotic Stress". In Crop Stress and its Management: Perspectives and Strategies, 317–57. Dordrecht: Springer Netherlands, 2011. http://dx.doi.org/10.1007/978-94-007-2220-0_9.

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Seo, Pil Joon, Jae-Hoon Jung e Chung-Mo Park. "Transcription Factors: Improving Abiotic Stress Tolerance in Plants". In Improving Crop Resistance to Abiotic Stress, 451–79. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527632930.ch20.

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Ishida, Tetsuya, Yuriko Osakabe e Shuichi Yanagisawa. "Transcription Factors: Improving Abiotic Stress Tolerance in Plants". In Improving Crop Resistance to Abiotic Stress, 591–621. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527632930.ch26.

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Kumar, Vinay, Saroj Kumar Sah, Tushar Khare, Varsha Shriram e Shabir Hussain Wani. "Engineering Phytohormones for Abiotic Stress Tolerance in Crop Plants". In Plant Hormones under Challenging Environmental Factors, 247–66. Dordrecht: Springer Netherlands, 2016. http://dx.doi.org/10.1007/978-94-017-7758-2_10.

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Pitzschke, Andrea. "Make Your Best - MYB Transcription Factors for Improving Abiotic Stress Tolerance in Crops". In Improving Crop Resistance to Abiotic Stress, 481–506. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2012. http://dx.doi.org/10.1002/9783527632930.ch21.

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Reddy, Dumbala Srinivas, Pooja Bhatnagar Mathur e K. K. Sharma. "Regulatory Role of Transcription Factors in Abiotic Stress Responses in Plants". In Climate Change and Plant Abiotic Stress Tolerance, 555–88. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527675265.ch21.

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Puranik, Swati, e Manoj Prasad. "Transcription Factors: Modulating Plant Adaption in the Scenario of Changing Climate". In Climate Change and Plant Abiotic Stress Tolerance, 589–604. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527675265.ch22.

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Yadav, Neelam R., Jyoti Taunk, Asha Rani, Bharti Aneja e Ram C. Yadav. "Role of Transcription Factors in Abiotic Stress Tolerance in Crop Plants". In Climate Change and Plant Abiotic Stress Tolerance, 605–40. Weinheim, Germany: Wiley-VCH Verlag GmbH & Co. KGaA, 2013. http://dx.doi.org/10.1002/9783527675265.ch23.

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Trabalhos de conferências sobre o assunto "Abiotic stress factors"

KACHEL_JAKUBOWSKA, Magdalena, Piotr BULAK e Andrzej BIEGANOWSKI. "INFLUENCE OF METAL NANOCOLLOIDS ON SELECTED ABIOTIC STRESS FACTORS IN PUMPKIN". In IX International ScientificSymposium "Farm Machinery and Processes Management in Sustainable Agriculture". Departament of Machinery Exploittation and Management of Production Processes, University of Life Sciences in Lublin, 2017. http://dx.doi.org/10.24326/fmpmsa.2017.26.

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Saltanovici, Tatiana, Larisa Andronic, Liudmila Antoci e Ana Doncila. "Analysis of the pollen under the conditions of abiotic and biotic stress factors". In XIth International Congress of Geneticists and Breeders from the Republic of Moldova. Scientific Association of Geneticists and Breeders of the Republic of Moldova, Institute of Genetics, Physiology and Plant Protection, Moldova State University, 2021. http://dx.doi.org/10.53040/cga11.2021.093.

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Turin, А. А., O. S. Pavlenko, K. V. Kabardaeva, O. A. Gra, V. S. Fadeev, О. Mustafaev e I. V. Goldenkova-Pavlova. "FINE CONTROL OF TRANSLATION FOR PLANT mRNA UNDER ABIOTIC STRESS FACTORS: A COMPLEX WEB OF MECHANISMS". In The All-Russian Scientific Conference with International Participation and Schools of Young Scientists "Mechanisms of resistance of plants and microorganisms to unfavorable environmental". SIPPB SB RAS, 2018. http://dx.doi.org/10.31255/978-5-94797-319-8-29-30.

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Parsaev, Evgeniy, Nadezhda Filippova, Tat'yana Kobernickaya e Viktor Ostrovskiy. "New variety of Karlybas volzhski melilot for fodder production in northern Kazakhstan". In Multifunctional adaptive fodder production23 (71). ru: Federal Williams Research Center of Forage Production and Agroecology, 2020. http://dx.doi.org/10.33814/mak-2020-23-71-73-77.

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"Role of the expansin and xyloglucan endotransglycosylase genes in the regulation of tobacco growth under the influence of abiotic stress factors". In Current Challenges in Plant Genetics, Genomics, Bioinformatics, and Biotechnology. Institute of Cytology and Genetics, Siberian Branch of the Russian Academy of Sciences Novosibirsk State University, 2019. http://dx.doi.org/10.18699/icg-plantgen2019-43.

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PIVORAS, Ainis, Marius MIKALAJŪNAS, Diana JUONYTĖ e Gintaras PIVORAS. "INTEGRATED EFFECT OF CLIMATE AND AIR POLLUTANTS ON DIURNAL TREE RING FORMATION OF SCOTS PINE, NORWAY SPRUCE AND SILVER AND DOWNY BIRCH TREES STEM CIRCUMFERENCE". In RURAL DEVELOPMENT. Aleksandras Stulginskis University, 2018. http://dx.doi.org/10.15544/rd.2017.099.

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The integrated effect of climatic and other abiotic stress factors including surface ozone on diurnal tree ring width formation of the prevailing in Lithuania tree species as the main response parameter of tree capacity to adapt to and mitigate the recent global changes was investigated. The obtained data revealed that Norway spruce is better adapted to recent climatic conditions in temperate forest than birch trees. Even during the drought episode spruce stem increment exceeded increment of the rest of considered tree species. Silver and Downy birch tree reactions revealed the lowest sensitivity of these tree species not only to unfavorable environmental factors but also to favorable factors which should stimulate tree growth intensity. This is why the growth intensity of this tree species recently has been gradually decreasing. The hypothesis that the coniferous species are more adaptive to recent climate changes was confirmed. The study is based on the results obtained conducting national project supported by Lithuanian Council of Research “FOREstRESS” (SIT- 3/2015).

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Sora, Dorin, e Mădălina Doltu. "GRAFTED TOMATOES – ECOLOGICAL ALTERNATIVE FOR CHEMICAL DISINFECTION OF SOIL". In GEOLINKS International Conference. SAIMA Consult Ltd, 2020. http://dx.doi.org/10.32008/geolinks2020/b1/v2/21.

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This study aimed to identification of an ecological alternative for the chemical disinfection of soil in the greenhouses from Romania. Tomato (Solanum lycopersicum L.) is one of the most popular vegetable crops in the world. The carbohydrate, vitamins, salts of important mineral elements and organic acids content of tomato fruits is very important. Tomato crops are very sensitive to climatic vagaries, so fluctuation in climatic parameters at any phase of growth can affect the yield and the fruit quality. Grafting on Solanaceae is a method which has improved and spread quickly during the past years, a similar approach to crop rotation, a practice meant to increase productivity, resistance or tolerance to biotic and abiotic stress factors and at increasing fruit quality. The research was conducted in a glass greenhouse of the Horting Institute, Bucharest, Romania. The biological material used was a Romanian tomato hybrid (Siriana F1), a Dutch tomato hybrid (Abellus F1) and four rootstocks, a Dutch tomato hybrid (Emperador F1) and three Romanian tomato cultivars (L542, L543 and L544) obtained from the Research and Development Station for Vegetable Growing, Buzău, Romania. The rootstocks have had resistance to biotic stress factors (soil diseases and pests) and the chemical disinfection of soil has was eliminated. The result of this research are presented in this paper.

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Donica, Ala, e Natalia Raileanu. "Evaluări silvopatologice în arboretele de cvercinee (studiu de caz)". In Starea actuală a componentelor de mediu. Institute of Ecology and Geography, Republic of Moldova, 2019. http://dx.doi.org/10.53380/9789975315593.26.

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The study aim was to identify the impact of the major defoliator pests of oaks, in correlation with the main oaks phenological phenomena and the development of various pests stages, to better understand the vitality of forest ecosystems, the causes and effects of stress factors. It was determined that the most aggressive pests of oaks in the studied stands were on the leaves: insects of fam.Cynipidae, Totrix viridana, Erannis defoliaria, Operophtera rumata, Tischeria complanella, insects of fam.Argidae; and on the fruit - Balaninus glandium. The actions of the insects were directly dependent on abiotic and biotic factors. The use of pheromone traps has proved to be an effective method in monitoring the pests of the investigated stands and has allowed the determination of outbreaks for the development of sp.Totrix viridana and Lymantria dispar. During the growing season, through crown defoliation, trees have gone from healthy tree to moderate and severe ones. The study suggests the need to develop effective strategies and measures to protect forests in the face of environmental changes.

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Zaikina, E. A., A. A. Galimova e B. R. Kuluev. "The role of transcription factor genes in the tolerance of common wheat to abiotic stress". In 2nd International Scientific Conference "Plants and Microbes: the Future of Biotechnology". PLAMIC2020 Organizing committee, 2020. http://dx.doi.org/10.28983/plamic2020.285.

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The expression profile of transcription factor genes was studied in varieties of common wheat in the pre-Ural steppe zone in response to drought and hypothermia. Increased transcriptional activity under stress is indicated for the TabZIP1, TabZIP60, TaDREB1, and TaNAC 69 genes.

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Sahu, Sarika, A. R. Rao, K. C. Bansal, S. K. Muthusamy e V. Chinnusamy. "Genome-wide analysis and identification of abiotic stress responsive transcription factor family genes and miRNAs in bread wheat (Triticumaestivum L.): Genomic study of bread wheat". In 2016 International Conference on Bioinformatics and Systems Biology (BSB). IEEE, 2016. http://dx.doi.org/10.1109/bsb.2016.7552159.

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