| Intact plastids are required for nitrate- and light-induced accumulation of nitrate reductase activity and mRNA in squash cotyledons. | |
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MedLine Citation:
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PMID: 16667294 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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Induction of nitrate reductase activity and mRNA by nitrate and light is prevented if chloroplasts are destroyed by photooxidation in norflurazon-treated squash (Cucurbita maxima L.) cotyledons. The enzyme activity and mRNA can be induced if norflurazon-treated squash seedlings are kept in low-intensity red light, which minimizes photodamage to the plastids. It is concluded that induction of nitrate reductase activity and nitrate reductase mRNA requires intact plastids. If squash seedlings grown in low-intensity red light are transferred to photooxidative white light, nitrate reductase activity accumulates during the first 12 hours after the shift and declines thereafter. Thus photodamage to the plastids and the disappearance of nitrate reductase activity and mRNA are events separable in time, and disappearance of the enzyme activity is a consequence of the damage to the plastids. |
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Authors:
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R Oelmüller; W R Briggs |
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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 Feb |
Date Detail:
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Created Date: 2010-06-29 Completed Date: 2010-06-29 Revised Date: 2010-09-15 |
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: 434-9 Citation Subset: - |
Affiliation:
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Department of Plant Biology, Carnegie Institution of Washington, Stanford, California 94305-1297. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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