| Effects of hypergravity on growth and cell wall properties of cress hypocotyls. | |
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MedLine Citation:
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PMID: 11539399 Owner: NASA Status: MEDLINE |
Abstract/OtherAbstract:
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Elongation growth of etiolated hypocotyls of cress (Lepidium sativum L.) was suppressed when they were exposed to basipetal hypergravity at 35 x g and above. Acceleration at 135 x g caused a decrease in the mechanical extensibility and an increase in the minimum stress-relaxation time of the cell wall. Such changes in the mechanical properties of the cell wall were prominent in the lower regions of hypocotyls. The amounts of cell wall polysaccharides per unit length of hypocotyls increased under the hypergravity condition and, in particular, the increase in the amount of cellulose in the lower regions was conspicuous. Hypergravity did not influence the neutral sugar composition of either the pectin or the hemicellulose fraction. The amount of lignin was also increased by hypergravity treatment, although the level was low. The data suggest that hypergravity modifies the metabolism of cell wall components and thus makes the cell wall thick and rigid, thereby inhibiting elongation growth of cress hypocotyls. These changes may contribute to the plants' ability to sustain their structures against hypergravity. |
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Authors:
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T Hoson; K Nishitani; K Miyamoto; J Ueda; S Kamisaka; R Yamamoto; Y Masuda |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of experimental botany Volume: 47 ISSN: 0022-0957 ISO Abbreviation: J. Exp. Bot. Publication Date: 1996 Apr |
Date Detail:
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Created Date: 1998-04-04 Completed Date: 1998-04-04 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 9882906 Medline TA: J Exp Bot Country: ENGLAND |
Other Details:
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Languages: eng Pagination: 513-7 Citation Subset: S |
Affiliation:
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Department of Biology, Osaka City University, Japan. h1817@ocugw.cc.osaka-cu.ac.jp |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acceleration Brassicaceae / cytology*, growth & development, metabolism Cell Wall / metabolism Cellulose / metabolism Centrifugation Hypergravity* Hypocotyl / cytology, growth & development*, metabolism Lignin / metabolism* Pectins / metabolism Polysaccharides / metabolism* |
| Chemical | |
Reg. No./Substance:
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0/Pectins; 0/Polysaccharides; 9004-34-6/Cellulose; 9005-53-2/Lignin |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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