| Gibberellic Acid Regulates Cell Wall Extensibility in Wheat (Triticum aestivum L.). | |
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MedLine Citation:
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PMID: 16667254 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Mutations (Rht genes) blocking sensitivity to gibberellic acid (GA) were used to examine phytohormone mediated cell wall expansion in wheat (Triticum aestivum L.). Irreversible extensibility of immature leaf segments, as determined by stress/strain (instron) measurements, declined with Rht gene dose. Exogenous GA(3) significantly increased wall extensibility in the nonmutant controls but had no effect on the near-isogenic GA-insensitive genotypes. Furthermore, ancymidol, an inhibitor of gibberellin biosynthesis, diminished wall extensibility in the nonmutant control. Extensibility of immature segments was highly correlated with mature leaf sheath length (R = +0.95). The results indicate that wall yielding properties of expanding wheat leaves are associated with leaf cell expansion potential and that GA is involved in the determination of those properties. |
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Authors:
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G Keyes; M E Sorrells; T L Setter |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Plant physiology Volume: 92 ISSN: 0032-0889 ISO Abbreviation: Plant Physiol. Publication Date: 1990 Jan |
Date Detail:
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Created Date: 2010-06-29 Completed Date: 2010-06-29 Revised Date: 2010-09-14 |
Medline Journal Info:
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Nlm Unique ID: 0401224 Medline TA: Plant Physiol Country: United States |
Other Details:
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Languages: eng Pagination: 242-5 Citation Subset: - |
Affiliation:
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Department of Plant Breeding and Biometry, Cornell University, Ithaca, New York 14850. |
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