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Developmental changes in the inner epidermis of the bean seed coat

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Author
Cavey, Michael J.
Yeung, E.C.
Department
Biological Sciences
Faculty
Faculty of Science
Institution
University of Calgary
Accessioned
2006-08-14T21:05:06Z
Available
2006-08-14T21:05:06Z
Issued
1990
Other
Phaseolus
Bean
Seed coat
Inner epidermis
Subject
Biology
Type
journal article
Metadata
Show full item record

Abstract
The inner epidermis of the bean seed coat shows remarkable structural changes during seed development. At the globular stage of development, a moderately electron-dense substance begins to accumulate in the outer tangential and radial walls of the cells. The staining and fluorescence characteristics, together with the localization ofperoxidase in the wall, suggest that this electron-dense material is a phenolic substance. At the same stage of embryo development, structural specialization can be detected in the cytoplasm of the epidermal cells with an increase in the abundance of organelles, especially the endoplasmic reticulum, mitochondria, and dictyosomes. These structural features are similar to those in the underlying branched parenchyma cells. As the seed rapidly expands during the maturation stage of embryo development, the epidermal cells and the inner layers of the branched parenchyma cells begin to degenerate. Small ruptures can be detected in the epidermis, exposing the branched parenchyma cells. These structural changes are discussed in relation to their possible functions during embryo development.
Refereed
yes
Sponsorship
Department of Biological Sciences, The University of Calgary, Calgary, Alberta
Citation
E. C. Yeung and M. J. Cavey "Developmental changes in the inner epidermis of the bean seed coat" Protoplasma (1990) 154:45-52
Url
http://www.springerlink.com/content/1615-6102/
Publisher
Springer-Verlag
Doi
http://dx.doi.org/10.11575/PRISM/35098
Uri
http://hdl.handle.net/1880/43420
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  • Science Research & Publications

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