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Journal articles on the topic 'Seed coat outer integument'

Author: Grafiati

Published: 31 August 2024

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1

Chaban, Inna A., Alexander A. Gulevich, Neonila V. Kononenko, Marat R. Khaliluev, and Ekaterina N. Baranova. "Morphological and Structural Details of Tomato Seed Coat Formation: A Different Functional Role of the Inner and Outer Epidermises in Unitegmic Ovule." Plants 11, no. 9 (2022): 1101. http://dx.doi.org/10.3390/plants11091101.

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In order to understand how and what structures of the tomato ovule with a single integument form the seed coat of a mature seed, a detailed study of the main development stages of the tomato ovule integument was carried out using the methods of light and electron microscopy. The integument itself it was shown to transform in the course of development into the coat (skin) of a mature seed, but the outer and inner epidermises of the integument and some layers of the integument parenchyma are mainly involved in this process. The outer epidermis cells are highly modified in later stages; their wal

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2

Baker, Daniel M., Harry C. Minor, and Billy G. Cumbie. "Scanning electron microscopy examination of soybean testa development." Canadian Journal of Botany 65, no. 11 (1987): 2420–24. http://dx.doi.org/10.1139/b87-329.

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Seeds of soybean (Glycine max (L.) Merr.) were harvested from greenhouse-grown plants and fractures of the seed coat were examined with a scanning electron microscope. The seed coat was well differentiated from the outer integument when the seed had reached approximately 30% maximum seed size. At this time, the osteosclereids began to separate, becoming fully detached along their radial walls by 50% maximum seed size. Macrosclereid secondary wall development occurred during growth of the seed from 50 to 100% maximum seed size. Near R6 (100% maximum seed size) the endothelium began differentiat

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3

Zhou, Jing, Yanrong Wang, and Jason Trethewey. "Semi-permeable layer formation during seed development in Elymus nutans and Elymus sibiricus." Acta Societatis Botanicorum Poloniae 82, no. 2 (2013): 165–73. http://dx.doi.org/10.5586/asbp.2013.012.

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<p>The semi-permeable layer is a layer in the seeds of certain plants that restricts or impedes the exchange of the solute while allowing the permeability of internal and external water and gas, which is valuable protection to sustain the health and secure the growth, development and germination. In this study, the formation time and location of the semi-permeable layer in seed coats of <em>Elymus nutants</em> (Griseb.) and <em>Elymus sibiricus</em> (L.) were investigated. The experimental seed materials were gathered in the field from the flowering to seed matura

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4

Hamilton, Kim N., Sarah E. Ashmore, Rod A. Drew, and Hugh W. Pritchard. "Seed morphology and ultrastructure in Citrus garrawayi (Rutaceae) in relation to germinability." Australian Journal of Botany 55, no. 6 (2007): 618. http://dx.doi.org/10.1071/bt06188.

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Combinational traits of seed size and seed-coat hardness in Citrus garrawayi (F.M.Bailey) (syn. of Microcitrus garrowayi) were investigated as markers for estimation of seed morphological and physiological maturity. Seed size (length) and coat hardness correlated well with changes in seed coat and embryo morphological development, dry-weight accumulation, decreases in moisture content and a significant increase in germinability. Seed moisture content decreased from 82 ± 1% in immature seeds to 40 ± 1% at seed maturation. The outer integument of immature seeds consisted of thin-walled epidermal

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5

Shinke, Ikumi, and Toru Tokuoka. "Embryology of Styracaceae and implications for the evolution of the integument number in Ericales." Botanical Journal of the Linnean Society 193, no. 1 (2020): 125–39. http://dx.doi.org/10.1093/botlinnean/boaa007.

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Abstract Phylogenetic relationships in Styracaceae are well understood, but embryological characters and the ontogeny of integument(s) are still uncertain in many species. The goals of this study are to evaluate the systematic implications of embryological characters in Styracaceae, clarify the character evolution of the number of integuments and suggest a mechanism for the transition between unitegmic and bitegmic ovules. We examined the embryological characters of four genera and five species of Styracaceae, most of which were shared across taxa. However, Styrax has specific embryological fe

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6

Neumann, Ulla, and Angela Hay. "Seed coat development in explosively dispersed seeds of Cardamine hirsuta." Annals of Botany 126, no. 1 (2019): 39–59. http://dx.doi.org/10.1093/aob/mcz190.

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Abstract Background and Aims Seeds are dispersed by explosive coiling of the fruit valves in Cardamine hirsuta. This rapid coiling launches the small seeds on ballistic trajectories to spread over a 2 m radius around the parent plant. The seed surface interacts with both the coiling fruit valve during launch and subsequently with the air during flight. We aim to identify features of the seed surface that may contribute to these interactions by characterizing seed coat differentiation. Methods Differentiation of the outermost seed coat layers from the outer integuments of the ovule involves dra

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7

Windsor, J. Brian, V. Vaughan Symonds, John Mendenhall, and Alan M. Lloyd. "Arabidopsis seed coat development: morphological differentiation of the outer integument." Plant Journal 22, no. 6 (2000): 483–93. http://dx.doi.org/10.1046/j.1365-313x.2000.00756.x.

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8

Wu, Limin, Aliaa El-Mezawy, and Saleh Shah. "A seed coat outer integument-specific promoter for Brassica napus." Plant Cell Reports 30, no. 1 (2010): 75–80. http://dx.doi.org/10.1007/s00299-010-0945-2.

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9

Liu, Zhenhua, Yan Wang, Wenjiang Pu, et al. "4-CPA (4-Chlorophenoxyacetic Acid) Induces the Formation and Development of Defective “Fenghou” (Vitis vinifera × V. labrusca) Grape Seeds." Biomolecules 11, no. 4 (2021): 515. http://dx.doi.org/10.3390/biom11040515.

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For some horticultural plants, auxins can not only induce normal fruit setting but also form fake seeds in the induced fruits. This phenomenon is relatively rare, and, so far, the underlying mechanism remains unclear. In this study, “Fenghou” (Vitis vinifera × V. labrusca) grapes were artificially emasculated before flowering and then sprayed with 4-CPA (4-chlorophenoxyacetic acid) to analyze its effect on seed formation. The results show that 4-CPA can induce normal fruit setting in “Fenghou” grapes. Although more seeds were detected in the fruits of the 4-CPA-treated grapevine, most seeds we

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10

Carrillo-Ocampo, Aida, and E. Mark Engleman. "Anatomía de la semilla de Chenopodium berlandieri ssp. nuttalliae (Chenopodiaceae) "huauzontle"." Botanical Sciences, no. 54 (April 25, 2017): 17. http://dx.doi.org/10.17129/botsci.1426.

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The seed of huauzontle (Chenopodium berlandieri ssp. nuttalliae) was studied by light microscopy and scanning electron microscopy. When the outer integument arises around the young ovule, instead of covering the inner integument and the nucellus, it grows backwards and partially surrounds the funiculus . When the pericarp is removed from the mature fruit, the seed is straw colored, because only the tegmen covers the seed. The chalaza of this seed has the form of a truncate cone, with the elliptical base towards the nucellus. In this zone of contact between the chalaza and the nucellus. a cutic

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11

Zhang, Keliang, Yin Zhang, Yusong Ji, Jeffrey L. Walck, and Jun Tao. "Seed Biology of Lepidium apetalum (Brassicaceae), with Particular Reference to Dormancy and Mucilage Development." Plants 9, no. 3 (2020): 333. http://dx.doi.org/10.3390/plants9030333.

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Lepidium apetalum (Brassicaceae) is an annual or biennial weed widely distributed in Asia and Europe. The outer surface of L. apetalum seeds produces a large amount of mucilage. The primary aim of this study was to explore the dormancy characteristics and to determine how mucilage develops. The role of mucilage in water absorption/dehydration, the effects of after-ripening, gibberellin acid (GA3), cold stratification and seed coat scarification on germination, the role of mucilage in germination and seedling growth during drought, and the progress of mucilage production during seed development

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12

García-Villanueva, Eduardo, and E. Mark Engleman. "Ontogenia de la semilla de Yucca periculosa (Agavaceae)." Botanical Sciences, no. 61 (May 20, 2017): 5. http://dx.doi.org/10.17129/botsci.1534.

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Seeds of several Yucca species have been studied by Arnott and Horner. They mainly studied the nature condition and stated that the extra-embryonic food reserve tissue is a perisperm. This paper provides ontogenic evidence that this tissue is an endosperm with nuclear development type. The seed shape is nearly a triangular prism less than 1 cm long, black color and the raphe groove is conspicuous. The seed coat is derived exclusively from the outer integument. The exotesta external periclinal cell wall appears with irregular thickness. Both mesotesta and endotesta grow irregularly inward the s

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13

Tobe, H., and PH Raven. "The embryology and relationships of Gyrostemonaceae*." Australian Systematic Botany 4, no. 2 (1991): 407. http://dx.doi.org/10.1071/sb9910407.

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On the basis of studies of Codonocalpus and Gyrostemon, this is the first report on the embryology of the Gyrostemonaceae, one of 15 glucosinolate-producing families. The embryology of Gyrostemonaceae was studied in an effort to clarify the phylogenetic relationships of those families that have been the subject of some dispute. Embryologically, Gyrostemonaceae possess distinctive features in integuments, seeds and seed coats. These include: the outer integument (or testa), non-multiplicative (i.e. two-cell-layered) and non-vascularised; seeds reniform and albuminous; the seed coat 'exotegmic',

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14

Feng, Qiuhong, Ming Cai, Honglin Li, and Xin Zhang. "How Seeds Attract and Protect: Seed Coat Development of Magnolia." Plants 13, no. 5 (2024): 688. http://dx.doi.org/10.3390/plants13050688.

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Seeds are one of the most important characteristics of plant evolution. Within a seed, the embryo, which will grow into a plant, can survive harsh environments. When the seeds are mature, the mother plant will disperse them from its body, allowing them to be taken away to grow in a new place. Otherwise, if the young generation grows alongside the mother plants in the same place, they will compete for sunlight and nutrition. The mother plants use different strategies to send away their seeds. One of these strategies is endozoochory, which means that the seeds disperse via ingestion by animals.

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15

Puspitaningtyas, D. M., E. K. Agustin, I. F. Wanda, et al. "The conservation of wild species banana (Musa velutina H.Wendl. & Drude) through seed germination technology." IOP Conference Series: Earth and Environmental Science 1271, no. 1 (2023): 012012. http://dx.doi.org/10.1088/1755-1315/1271/1/012012.

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Abstract Musa velutina H. Wendl. & Drude is a member of the Musaceae family, which is known as the pink velvet banana. This species has problems with seed germination. The seed coat has a hard layer of the outer integument that inhibits the germination process. This study aimed to determine the effect of the soaking time at various soaking media of the seven treatments on the seed germination of M. velutina. The method used a completely randomized design with seven treatments and three replications. The seeds were collected from a fruit bunch of M. velutina in Bogor Botanic Gardens. The nu

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16

Trimanto, Trimanto, Elga Renjana, Dewi Ayu Lestari, et al. "Morphological Characterization and Seed Germination Study of Wild Banana <i>Musa acuminata</i> var. <i>flava</i> (Ridl.) Nasution." Journal of Tropical Biodiversity and Biotechnology 7, no. 1 (2022): 66645. http://dx.doi.org/10.22146/jtbb.66645.

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Wild bananas provide important genetic materials for further banana improvement, therefore they need to be conserved and studied. This study aimed to describe morphological characteristics of plant and seed and also to study the seed germination of wild banana M. acuminata var. flava (Ridl.) Nasution. The morphological characteristics were observed descriptively by referring to the descriptor for banana. The internal and external morphology of the seeds were observed using a digital microscope. The germination testing was carried out by a completely randomized design, using fresh seeds extract

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17

Clarke, Kerri, and Nallamilli Prakash. "Floral morphology and embryology of two Australian species of Citrus (Rutaceae)." Australian Journal of Botany 49, no. 2 (2001): 199. http://dx.doi.org/10.1071/bt99054.

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The floral morphology and embryology of two species of Australian Citrus L. occurring in the most southerly range of the genus, C. australasica F.Muell. and C. australis (Mudie) Planchon, have been studied. Cytokinesis in the microsporocytes was simultaneous resulting in tetrahedral tetrads. Tapetal cells were bi- to multinucleate and unevenly one- or two-layered. Microspore development was frequently asynchronous. Anther wall consisted of a layer of endothecium, three to five middle layers and one or two layers of Secretory tapetum. The ovules were anatropous, bitegmic and crassinucellate. Al

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18

Castro, Elisa de Melo, Édila Vilela de Resende Von Pinho, Amador Eduardo de Lima, et al. "Physiological quality, lignin and the ultrastructural characterization of soybean seeds." Acta Scientiarum. Agronomy 46, no. 1 (2023): e63621. http://dx.doi.org/10.4025/actasciagron.v46i1.63621.

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In soybeans, the integument or seed coat is an important modulator between the external and internal environment. It plays a fundamental role in seed vitality, and its lignin content may influence the seed quality. The objective of this experiment was to evaluate the quality of soybean seeds from a partial diallel and their reciprocals and its relationship with lignin content, seed coat thickness, and deposition location. The seeds were also evaluated for physiological quality through germination and accelerated aging tests. The lignin content was quantified by absorbance, and the integument t

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19

Id, Vera Lygia El Id, and Nelson Augusto dos Santos Junior. "Adaptive advantage of Sesbania virgata (Cav.) Pers. in the phytochemical production: the influence on fungi occurring in seeds." Acta Scientiarum. Biological Sciences 45 (October 27, 2023): e65301. http://dx.doi.org/10.4025/actascibiolsci.v45i1.65301.

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Sesbania virgata is a native Brazilian plant species. It exhibits rapid growth, a high soil cover potential, and efficient soil seed bank formation and is used in environmental restoration projects. The soil seed bank is susceptible to fungal infection and other biotic factors. However, only a few studies have reported on the fungi on the surface of S. virgata seeds. Moreover, little is known about how substances present in the seed integument affect fungal communities and their role in adapting to and thriving in new environments. Herein, S. virgata seeds were collected from populations that

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20

Matilla, Angel J. "Seed coat formation: its evolution and regulation." Seed Science Research 29, no. 4 (2019): 215–26. http://dx.doi.org/10.1017/s0960258519000254.

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AbstractIn higher plants, the seed precursor (ovule primordia) is composed of three parts: funiculus, nucellus and chalaza, generating the latter one (II) or two (OI and II) protective maternal integuments (seed coat, SC). The appearance of a viable seed requires the coordinate growth and development of the preceding three compartments. Integuments are essentials for seed life as they nourish, protect and facilitate seed dispersion. Endosperm and integument growth and development are tightly coupled. Gymnosperm and angiosperm ovules are commonly unitegmic and bitegmic, respectively. Unusually,

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21

Miart, Fabien, Jean-Xavier Fontaine, Gaëlle Mongelard, et al. "Integument-Specific Transcriptional Regulation in the Mid-Stage of Flax Seed Development Influences the Release of Mucilage and the Seed Oil Content." Cells 10, no. 10 (2021): 2677. http://dx.doi.org/10.3390/cells10102677.

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Flax (Linum usitatissimum L.) seed oil, which accumulates in the embryo, and mucilage, which is synthesized in the seed coat, are of great economic importance for food, pharmaceutical as well as chemical industries. Theories on the link between oil and mucilage production in seeds consist in the spatio-temporal competition of both compounds for photosynthates during the very early stages of seed development. In this study, we demonstrate a positive relationship between seed oil production and seed coat mucilage extrusion in the agronomic model, flax. Three recombinant inbred lines were selecte

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22

Yu, Anmin, Zaiqing Wang, Yang Zhang, Fei Li, and Aizhong Liu. "Global Gene Expression of Seed Coat Tissues Reveals a Potential Mechanism of Regulating Seed Size Formation in Castor Bean." International Journal of Molecular Sciences 20, no. 6 (2019): 1282. http://dx.doi.org/10.3390/ijms20061282.

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The physiological and molecular basis of seed size formation is complex, and the development of seed coat (derived from integument cells) might be a critical factor that determines seed size formation for many endospermic seeds. Castor bean (Ricinus communis L.), a model system of studying seed biology, has large and persistent endosperm with a hard seed coat at maturity. Here, we investigated the potential molecular mechanisms underlying seed size formation in castor bean by comparing the difference between global gene expression within developing seed coat tissues between the large-seed ZB10

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23

Baker, Daniel M., and Tadesse Mebrahtu. "Scanning electron microscopy examination of soybean hilum development." Canadian Journal of Botany 68, no. 3 (1990): 544–50. http://dx.doi.org/10.1139/b90-075.

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Seeds of the soybean (Glycine max (L.) Merr.) cultivar Tracy-M were harvested from field-grown plants, and fractures of the hilum were examined with a scanning electron microscope. Macrosclereid and hilar fissure differentiation were observed at approximately 1% maximum seed size. The tracheid bar, stellate cells, sclerenchyma, and rim aril began differentiation near 5% maximum seed size. Outer integument differentiation was nearly completed by 35% maximum seed size, when articulated parenchyma, aerenchyma, and pits in the developing tracheids were observed. Hilum development was completed whe

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Oliveira, D. M. T., and E. A. S. Paiva. "Anatomy and ontogeny of Pterodon emarginatus (Fabaceae: Faboideae) seed." Brazilian Journal of Biology 65, no. 3 (2005): 483–94. http://dx.doi.org/10.1590/s1519-69842005000300014.

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The aim of this study was to describe the anatomy and ontogeny of Pterodon emarginatus seed using the usual techniques. The ovules are campilotropous, crassinucelate, and bitegmic. The following processes occur during integument development: anticlinal divisions and phenolic compound accumulations in the exotesta, whose cells become palisade; predominantly periclinal divisions and cell expansion in the mesotesta, where the rapheal bundle differentiates; differentiation of the hourglass-cell layer adjacent to the palisade; fusion of outer and inner integuments, which remain individualized struc

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Zhang, Mingxia, Rui Dong, Penghui Huang, et al. "Novel Seed Size: A Novel Seed-Developing Gene in Glycine max." International Journal of Molecular Sciences 24, no. 4 (2023): 4189. http://dx.doi.org/10.3390/ijms24044189.

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Soybean-seed development is controlled in multiple ways, as in many known regulating genes. Here, we identify a novel gene, Novel Seed Size (NSS), involved in seed development, by analyzing a T-DNA mutant (S006). The S006 mutant is a random mutant of the GmFTL4pro:GUS transgenic line, with phenotypes with small and brown seed coats. An analysis of the metabolomics and transcriptome combined with RT-qPCR in the S006 seeds revealed that the brown coat may result from the increased expression of chalcone synthase 7/8 genes, while the down-regulated expression of NSS leads to small seed size. The

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Yamada, Toshihiro, Ryoko Imaichi, Nallamilli Prakash, and Masahiro Kato. "Developmental morphology of ovules and seeds of Austrobaileyales." Australian Journal of Botany 51, no. 5 (2003): 555. http://dx.doi.org/10.1071/bt03056.

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Development of ovules of Illicium anisatum (Illiciaceae), Trimenia moorei (Trimeniaceae), and Austrobaileya scandens (Austrobaileyaceae) (Austrobaileyales) was observed. In Austrobaileya scandens and Trimenia moorei the outer integument is hood-shaped, while it is cup-shaped in Illicium anisatum. On the basis of a phylogeny, the ovule with the hood-shaped outer integument is suggested to be primitive in Austrobaileyales. Seed development of Austrobaileyales was also examined. In Austrobaileya scandens the seed is mesotestal, ruminated, not pachychalazal, and has a micropyle–hilum complex. In T

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27

Alves-Junior, Clodomiro, Dinnara L. S. da Silva, Jussier O. Vitoriano, Anne P. C. B. Barbalho, and Regina C. de Sousa. "The water path in plasma-treated Leucaena seeds." Seed Science Research 30, no. 1 (2020): 13–20. http://dx.doi.org/10.1017/s0960258520000045.

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AbstractThe effects of cold atmospheric plasma (CAP) of dielectric barrier discharges on the wettability, imbibition and germination of Leucaena leucocephala were investigated. It was established that CAP treatment markedly hydrophilized the seed coat, especially at longer treatment times. From the profile of the imbibition curve and visual observation, it was possible to verify that there are two resistance barriers to water penetration: integument surface and region of the macrosclereid cell wall (light line). Although the plasma interacts only in the integument, increasing the density of hy

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28

Boesewinkel, F. D. "Ovules and Seeds of Tremandraceae." Australian Journal of Botany 47, no. 5 (1999): 769. http://dx.doi.org/10.1071/bt98016.

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The Tremandraceae have bitegmic, anatropous and crassinucellate ovules with dermal integuments and a very thick inner integument. A chalazal appendage is present in Tetratheca and Tremandra. The hairy seeds have a seed coat with a crystalliferous endotesta and a fibrous exotegmen. The cream-coloured chalazal appendage functions as an elaiosome and the walls of the epidermal cells are rich in fatty substances. The seeds of Platytheca lack the elaiosome but are covered with inflated and thinner hairs. The ovule and seed characters of Tremandraceae suggest a relationship with the Linales alliance

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29

Pallavi, H. M., K. Vishwanath, Bapurayagouda Patil, N. Naveen, and Manjunath Thattimani. "Seed anatomical studies on dormancy and germination in Chamaecrista absus." Journal of Applied and Natural Science 8, no. 2 (2016): 868–73. http://dx.doi.org/10.31018/jans.v8i2.888.

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Present study was conducted to analyze the anatomical structure of seed to study the dormancy behaviour in Chamaecrista absus. Seed germination behaviour was also studied after breaking the seed dormancy by artificial seed treatments. The anotamical studies revealed that seed has apical hilar region and seed coat has four layers consisting of outer cuticle, sub cuticle, palisade layer and inner tegma leading to physical dormancy. Outer cuticle and sub cuticle layers are very hard to break naturally and hence seeds possess hard seed coat dormancy. This physically hard seed coat should be made s

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Commey, Leslie, Theophilus K. Tengey, Christopher J. Cobos, et al. "Peanut Seed Coat Acts as a Physical and Biochemical Barrier against Aspergillus flavus Infection." Journal of Fungi 7, no. 12 (2021): 1000. http://dx.doi.org/10.3390/jof7121000.

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Aflatoxin contamination is a global menace that adversely affects food crops and human health. Peanut seed coat is the outer layer protecting the cotyledon both at pre- and post-harvest stages from biotic and abiotic stresses. The aim of the present study is to investigate the role of seed coat against A. flavus infection. In-vitro seed colonization (IVSC) with and without seed coat showed that the seed coat acts as a physical barrier, and the developmental series of peanut seed coat showed the formation of a robust multilayered protective seed coat. Radial growth bioassay revealed that both i

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Beardsell, DV, RB Knox, and EG Williams. "Fruit and Seed Structure of Thryptomene calycina (Myrtaceae)." Australian Journal of Botany 41, no. 2 (1993): 183. http://dx.doi.org/10.1071/bt9930183.

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At anthesis the receptacle of flowers of T. calycina (Lindl.) Stapf is enclosed by a layer of small cells with a thick cuticle. The hypodermis consists mostly of large oil-containing cells interspersed with much smaller cells. The tissue surrounding the ovary consists mostly of spongy parenchyma. The micropyle of the ovule is formed only by the inner integument which is double-layered. The embryo sac at anthesis is typical of the Myrtaceae, and appears to follow the monosporic polygonum type, with considerable nucellar tissue surrounding it. In a mature fruit the parenchyma is compressed into

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Pelc, Stanisław. "Morphology and stucture of wild apple (Malus silvestris Mill.).common pear (Pyrus cofnmunis L.) and Chaenomeles japonica (Thunb) Lindl. seeds." Acta Societatis Botanicorum Poloniae 53, no. 2 (2014): 159–70. http://dx.doi.org/10.5586/asbp.1984.015.

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The outer and inner structure of wild apple (<em>Malus silvestris</em> Mill.), common pear (<em>Pyrus communis</em> L.) and <em>Chaenomeles japonica</em> (Thunb.) Lindl. seeds was investigated. It was found that the outer structure exhibits good diagnostic features expressed in the first place in the relief of the seed coat and further in the arrangement and appearance of the site of attachment of the free end of the funiculus and the shape of the seeds. In ripe seeds there is, under the thick seed coat, an endosperm layer completely surrounding the embryo w

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Lisci, Marcello, and Ettore Pacini. "Fruit and seed structural characteristics and seed dispersal in Mercurialis annua L. (Euphorbiaceae)." Acta Societatis Botanicorum Poloniae 66, no. 3-4 (2014): 379–86. http://dx.doi.org/10.5586/asbp.1997.047.

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The fruit of <em>Mercurialis annua</em> L. is a two-seeded capsule with a caruncle, a small appendage which arises from the outer integument in the micropylar area. The inner integument has a thick layer of Malpighian-like cells, interrupted at the micropyle by a remnant of nucellus, the walls of which contain suberin. There is no cuticle covering the caruncle and its cells have lipids and protein bodies as reserves. Seed dispersal occurs by a combination of autochory followed by myrmecochory. The explosive ejection of seeds is caused by dehydration-induced torsion of the mechanica

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34

Sampaio, Danielle Affonso, Alfredo José Dos Santos Junior, Natália Dias de Souza, and Roberto Carlos Costa Lelis. "Diversity of Secondary Metabolites of Araucaria Seed (Araucaria angustifolia (Bert.) O. Ktze) Residues." Ensaios e Ciência C Biológicas Agrárias e da Saúde 26, no. 2 (2022): 289–92. http://dx.doi.org/10.17921/1415-6938.2022v26n2p289-292.

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A semente da Araucaria angustifolia (Bert.) O. Ktze é conhecida como pinhão e é considerada um alimento de alto valor nutricional. No consumo do pinhão, seu tegumento é descartado, gerando um resíduo que apresenta um processo lento de decomposição. Esse material é composto por três camadas de tecido: camada interna (endotesta), camada intermediária (mesotesta) e camada externa (exotesta). Estudos têm explorado o uso de extratos obtidos desse resíduo florestal, uma vez que a ocorrência de metabólitos pode levar à sua caracterização e isolamento proporcionando amplas aplicações. Considerando a i

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Edelstein, M., H. Nerson, F. Corbineau, and J. Kigel. "838 PB 358 CONTROL OF LOW-TEMPERATURE GERMINATION OF MELON (CUCUMISMELO L.) SEEDS BY SEED-COAT STRUCTURE AND OXYGEN AVAILABILITY." HortScience 29, no. 5 (1994): 553c—553. http://dx.doi.org/10.21273/hortsci.29.5.553c.

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The involvement of the seed coat in low temperature germination of melon seeds was examined in two accessions differing in their ability to germinate at 14°C: `Noy Yizre'el' (NY) (a cold-sensitive cultivar) and `Persia 202' (P-202) (a cold-tolerant breeding line). Submerging the whole seed, or covering the hilum with lanolin, strongly depressed germination of NY, but not of P-202. Accessions differed in germination response to decreasing O2 concentration, with NY showing higher sensitivity to hypoxia. Intercellular spaces in the outer layer of the seed-coat were evident in the more tolerant P-

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Miao, Z. H., J. A. Fortune, and J. Gallagher. "Anatomical structure and nutritive value of lupin seed coats." Australian Journal of Agricultural Research 52, no. 10 (2001): 985. http://dx.doi.org/10.1071/ar00117.

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Selection and breeding for yield and adaptation to environmental conditions often changes a number of characteristics of crops, and may influence the value of seed for animals. A series of experiments was conducted to evaluate the effect of breeding and growing conditions on the structure and degradability of lupin seed coats. Breeding has had significant influences on both seed size and seed coat structure of lupins. For instance, cultivars of Lupinus angustifolius released in 1987 and 1988 tended to have smaller seeds with a thicker seed coat than those released in 1971 (P < 0.05). Select

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WANG, LIU, YUN-YUN ZHAO, and JIA-XI LIU. "Embryology of Myosoton and Stellaria and its taxonomic significance (Caryophyllaceae)." Phytotaxa 306, no. 2 (2017): 124. http://dx.doi.org/10.11646/phytotaxa.306.2.2.

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The systematic relationship between the genera Myosoton and Stellaria is a currently controversial. In this study, we compared their embryological characteristics of these two taxa using conventional paraffin section techniques and scanning electron microscopy. The results obtained showed that Myosoton and Stellaria share some common features. They all have tetrasporangiate anthers with dicotyledonous wall, secretory tapetum, microspore mother cells with simultaneous cytokinesis, tetrahedral tetrad, 3-celled mature pollen grains, linear megaspore tetrad, monosporic polygonum embryo sac, ovary

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Chaban, Inna A., Alexander A. Gulevich, and Ekaterina N. Baranova. "Formation of Unique Placental Seed Capsules in the Maturation Process of the Tomato Fruit." International Journal of Molecular Sciences 23, no. 19 (2022): 11101. http://dx.doi.org/10.3390/ijms231911101.

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The morphological and anatomical study of the seed formation features in a juicy tomato fruit was carried out. The ovules, which form on the placenta, have been shown to be gradually enveloped by the protrusions of placental tissue that arises simultaneously with them. As a result of this process, each seed is enclosed in an individual capsule. These seed capsules have been shown in vivo to be airtight and air-filled. Tomato seeds, as has been shown in this study, develop inside these capsules until the full maturity of the fruit and do not come into contact with the detached and moldered cell

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Liu, Jianjian, Gaihua Qin, Chunyan Liu, et al. "Genome-wide identification of candidate aquaporins involved in water accumulation of pomegranate outer seed coat." PeerJ 9 (July 15, 2021): e11810. http://dx.doi.org/10.7717/peerj.11810.

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Aquaporins (AQPs) are a class of highly conserved integral membrane proteins that facilitate the uptake and transport of water and other small molecules across cell membranes. However, little is known about AQP genes in pomegranate (Punica granatum L.) and their potential role in water accumulation of the outer seed coat. We identified 38 PgrAQP genes in the pomegranate genome and divided them into five subfamilies based on a comparative analysis. Purifying selection played a role in the evolution of PgrAQP genes and a whole-genome duplication event in Myrtales may have contributed to the expa

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Oh, Tae, you park, Chang Kim, Young cho, and myoung jang. "Effect of Seed Disinfection on Bakanae disease in Ginkgo biloba Outer Seed Coat Extract." Emirates Journal of Food and Agriculture 28, no. 9 (2016): 671. http://dx.doi.org/10.9755/ejfa.2016-04-357.

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Zhang, Hengyou, Wolfgang Goettel, Qijian Song, et al. "Selection of GmSWEET39 for oil and protein improvement in soybean." PLOS Genetics 16, no. 11 (2020): e1009114. http://dx.doi.org/10.1371/journal.pgen.1009114.

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Soybean [Glycine max (L.) Merr.] was domesticated from wild soybean (G. soja Sieb. and Zucc.) and has been further improved as a dual-use seed crop to provide highly valuable oil and protein for food, feed, and industrial applications. However, the underlying genetic and molecular basis remains less understood. Having combined high-confidence bi-parental linkage mapping with high-resolution association analysis based on 631 whole sequenced genomes, we mapped major soybean protein and oil QTLs on chromosome15 to a sugar transporter gene (GmSWEET39). A two-nucleotide CC deletion truncating C-ter

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Gonzalez, Antonio, John Mendenhall, Yujia Huo, and Alan Lloyd. "TTG1 complex MYBs, MYB5 and TT2, control outer seed coat differentiation." Developmental Biology 325, no. 2 (2009): 412–21. http://dx.doi.org/10.1016/j.ydbio.2008.10.005.

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Ribeiro, Rafaella C., Denise M. T. Oliveira, and Fernando A. O. Silveira. "A new seed coat water-impermeability mechanism in Chaetostoma armatum (Melastomataceae): evolutionary and biogeographical implications of physiophysical dormancy." Seed Science Research 25, no. 2 (2015): 194–202. http://dx.doi.org/10.1017/s0960258515000070.

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AbstractDetermining the phylogenetic and biogeographic distribution of physical dormancy remains a major challenge in germination ecology. Here, our goal was to describe a novel water-impermeable seed coat mechanism causing physical dormancy (PY) in the seeds of Chaetostoma armatum (Melastomataceae). Although seed coat permeability tests indicated a significant increase in seed weight after soaking in distilled water, anatomical and dye-tracking analyses showed that both water and dyes penetrated the seed coat but not the embryo, which remained in a dry state. The water and dye penetrated the

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Sharma, Dilip Kumar, and Kailash Agrawal. "Incidence and Histopathological Study of Xanthomonas axonopodis pv. vesicatoria (Doidge) Dye in Chilli (Capsicum spp.) Seeds in Western Rajasthan." Middle East Journal of Applied Science & Technology 05, no. 03 (2022): 01–12. http://dx.doi.org/10.46431/mejast.2022.5301.

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Bacterial leaf spot is a destructive disease in Rajasthan caused by Xanthomonas axonopodis pv. vesicatoria (Doidge) Dye. A field and market survey was conducted for the study of incidence and location. Dry seed examination of 103 seed samples of chilli (Capsicum spp.) belonging to 16 districts of Rajasthan that revealed a 10–100% incidence of Xanthomonas axonopodis pv. vesicatoria (XAV) on Tween-80 medium. Two naturally infected seed samples of chilli carrying a 100% incidence of XAV were selected and categorized into asymptomatic (06.25–94.25%), moderately discolored (01.75–42%), and heavily

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Szkudlarz, Piotr, and Zbigniew Celka. "Morphological characters of the seed coat in selected species of the genus Hypericum L. and their taxonomic value." Biodiversity Research and Conservation 44, no. 1 (2016): 1–9. http://dx.doi.org/10.1515/biorc-2016-0022.

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Abstract Eight Hypericum species are native to Poland: H. elegans Stephan ex Willd., H. hirsutum L., H. humifusum L., H. maculatum Crantz, H. montanum L., H. perforatum L., H. pulchrum L., and H. tetrapterum Fr. Only seeds of H. elegans were investigated in detail in Poland before, so here we present results of qualitative and quantitative analyses of seed morphology of the other 7 species, based on characters like seed length, width, and shape, seed coat sculpture, shape of epidermal cells of the testa, and number of epidermal cells along the seed axis. The results show that seeds of the stud

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Li, Guixiang, Jiyu Li, Gaihua Qin, et al. "Characterization and Expression Analysis of the UDP Glycosyltransferase Family in Pomegranate (Punica granatum L.)." Horticulturae 9, no. 1 (2023): 119. http://dx.doi.org/10.3390/horticulturae9010119.

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UDP glycosyltransferases (UGTs) play an indispensable role in regulating signaling pathways and intracellular homeostasis in plants by catalyzing the glycosylation of metabolites. To date, the molecular characteristics and potential biological functions of the UGT gene family in pomegranate (Punica granatum L.) remain elusive. In this study, a total of 120 PgUGT genes were identified in the pomegranate genome. Phylogenetic analysis revealed that these PgUGTs were clustered into 15 groups: 13 conserved groups (A–J and L–N) and two newly discovered groups (P and R). Structural analysis showed th

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Espinosa-Osornio, Guadalupe, and E. Mark Engleman. "Anatomía del desarrollo de la semilla de Hippocratea celastroides." Botanical Sciences, no. 53 (April 24, 2017): 43. http://dx.doi.org/10.17129/botsci.1415.

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Embryological studies of Hippocratea are restricted to few species, and they show similarity between Hippocratea and Celastraceae. Nevertheless, differences based on H. grahamii have originate controversy on the taxonomic position of the genus. We have examined the seed development of H. celastroides H.B.K, by ligth microscopy. This specie has anatropous and bitegmic ovules. At anthesis, the micropyle is formed only by the inner integument. In the endotegmen and exotesta there are tannin deposits beginning in early stages. After fertilization, the outer integument increases abundantly, it alon

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Suhendra, D., Z. Ikhsan, and S. Aisyah. "Seed structure and germination pattern of sugar palm [Arenga pinnata L.]." IOP Conference Series: Earth and Environmental Science 1160, no. 1 (2023): 012018. http://dx.doi.org/10.1088/1755-1315/1160/1/012018.

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Abstract Sugar palm is a type of palm plant, which can grow at various altitudes with different soil types. Sugar palm plants have high prospects because all parts of the plant can be used as traditional medicine, building materials, ingredients for making brown sugar, vinegar, starch, or flour, and as ingredients for various foods. In the cultivation of sugar palm plants, there are several problems found, one of which is the seeds that have a period of dormancy. The reason is the hard and impermeable seed coat that prevents water imbibition. This study aims to determine the structure and germ

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Barsberg, S. T., Y. I. Lee, and H. N. Rasmussen. "Development of C-lignin with G/S-lignin and lipids in orchid seed coats – an unexpected diversity exposed by ATR-FT-IR spectroscopy." Seed Science Research 28, no. 1 (2018): 41–51. http://dx.doi.org/10.1017/s0960258517000344.

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AbstractMembers of the orchid family occupy many germination niches, in terrestrial, epiphytic and epilithic environments. How orchid seeds attach to their substrate and survive after dispersal is largely unknown. C-lignin is a recently discovered specialized lignin, found in seed coats of some plants, including orchid species, but its functional and biological significance is obscure. We studied seed coat ontogenesis in three species (Neuwiedia veratrifolia, Cypripedium formosanum and Phalaenopsis aphrodite) that represent basal and advanced branches in orchid phylogeny and divergent life for

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Nikolic, Natasa, Ljiljana Merkulov, Borivoj Krstic, Slobodanka Pajevic, Milan Borisev, and Sasa Orlovic. "Variability of acorn anatomical characteristics in Quercus robur L. genotypes." Zbornik Matice srpske za prirodne nauke, no. 118 (2010): 47–58. http://dx.doi.org/10.2298/zmspn1018047n.

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The aim of this study was to examine variability of acorn anatomical characteristics in seventeen Quercus robur L. genotypes. Acorns were collected in clonal seed orchard Banov Brod (Srem, Vojvodina, Serbia). Microscopic measurements were done for pericarp (total thickness, thickness of exocarp and mesocarp), seed coat (total thickness, thickness of outer epidermis, parenchyma, and inner epidermis), and embryo axis (diameter, thickness of cortical region, and diameter of stellar zone). Obtained results revealed certain divergence between genotypes. The thickness of pericarp varied from 418 to

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