| The endogenous hormones in soybean seedlings under the joint actions of rare earth element La(III) and ultraviolet-B stress. | |
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MedLine Citation:
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PMID: 19462161 Owner: NLM Status: In-Process |
Abstract/OtherAbstract:
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The dynamic state of endogenous hormone content in soybean seedlings was investigated for a further demonstration of alleviating the damage of the ultraviolet ultraviolet-B (UV-B) radiation in the La(III)-treated soybean seedlings under UV-B stress. Using hydroponics culture, the effects of lanthanum(III) on the contents of endogenous hormone under elevated ultraviolet-B radiation (280–320 nm) was studied. The results showed that the content of indole-3-acetic acid (IAA) in soybean seedlings decreased initially and then increased when the seedlings underwent UV-B treatment during the stress and convalescent period; this was compared with a control; acetic acid oxidase (IAAO) activity increased at first (first to fifth day) and then decreased (sixth to 11th day). A similar change of abscisic acid content and IAAO content in soybean seedlings occurred; gibberellic acid (GA) content decreased during the experiment compared with control. The content of IAA and GA in soybean seedlings with La(III) + UV-B treatment was higher than those of UV-B treatment; IAAO activity and GA content in soybean seedlings with La (III) + UV-B treatment were lower than those of UV-B treatment. It suggested that the regulative effect of La(III) at the optimum concentration on endogenous hormone improved the ability of plant stress resistance, and its protective effect against low UV-B radiation was superior to high UV-B radiation. The defensive effect of La(III) on soybean seedlings under UV-B stress was carried out on the layer of defense system. |
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Authors:
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Qi Peng; Qing Zhou |
Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Biological trace element research Volume: 132 ISSN: 1559-0720 ISO Abbreviation: Biol Trace Elem Res Publication Date: 2009 Dec |
Date Detail:
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Created Date: 2011-04-05 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7911509 Medline TA: Biol Trace Elem Res Country: United States |
Other Details:
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Languages: eng Pagination: 270-7 Citation Subset: IM |
Affiliation:
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School of Environment and Civil Engineering, Jiangnan University, Wuxi 214122, People's Republic of China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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