On the Development of Macrosclereids in Seed Coats of Pisum sativum L.
1983; Wiley; Volume: 70; Issue: 10 Linguagem: Inglês
10.2307/2443351
ISSN1537-2197
Autores Tópico(s)Proteins in Food Systems
ResumoAmerican Journal of BotanyVolume 70, Issue 10 p. 1528-1535 Article ON THE DEVELOPMENT OF MACROSCLEREIDS IN SEED COATS OF PISUM SATIVUM L. William M. Harris, William M. Harris Department of Botany and Microbiology, University of Arkansas, Fayetteville, Arkansas, 72701Search for more papers by this author William M. Harris, William M. Harris Department of Botany and Microbiology, University of Arkansas, Fayetteville, Arkansas, 72701Search for more papers by this author First published: 01 November 1983 https://doi.org/10.1002/j.1537-2197.1983.tb10856.xCitations: 8AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onFacebookTwitterLinkedInRedditWechat Abstract Macrosclereid differentiation was investigated by light and electron microscopy in pea testae during the transformation of protodermal precursors to the mature sclereids. The protodermal cells divide anticlinally and elongate into the macrosclereid layer during seed coat development. Young sclereids have elongate nuclei, plastids become somewhat granal during cellular maturation, vacuolation appears to be an autolytic process, and the cells have dense arrays of endoplasmic reticulum and ribosomes. Considerable dictyosome activity and microtubule development is observed as the secondary wall is produced. Many coated vesicles are associated with and fuse with the plasmalemma. During development, the outer tangential wall area of the macrosclereids acquires a definite cuticle and subcuticular layer. Also, at this time the sclereid walls under the subcuticular layer display semicircular microfibril orientation. The sclereid walls adjacent to the hypodermis become multilayered. As the macrosclereids near maturity, the "light line" becomes discernable in the light microscope at the junction of the cellulosic tips of the macrosclereids and the subcuticular layer. This "light line" is prominent using interference optics and is an osmiophilic layer in the electron microscope. This layer may represent the suberin "caps" reported by earlier workers. Citing Literature Volume70, Issue10November-December 1983Pages 1528-1535 RelatedInformation
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