| Rice tillering dwarf mutant dwarf3 has increased leaf longevity during darkness-induced senescence or hydrogen peroxide-induced cell death. | |
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MedLine Citation:
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PMID: 17895586 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Senescence or cell death in plant leaves is known to be inducible by darkness or H(2)O(2). When the Arabidopsis gene MAX2/ORE9 is disrupted, leaf senescence or cell death in response to the above stimuli is delayed. Because the rice (Oryza sativa L.) gene DWARF3 (D3) is orthologous to MAX2/ORE9, we wished to know whether disruption of D3 also results in increased longevity in leaves. We found that darkness-induced senescence or H(2)O(2)-induced cell death in the third leaf [as measured by chlorophyll degradation, membrane ion leakage and expression of senescence-associated genes (SAGs)] in a d3 rice mutant was delayed by 1-3 d compared to that in its reference line Shiokari. Moreover, the mRNA levels of D3, HTD1 and D10, which are orthologs of Arabidopsis MAX2/ORE9, MAX3 and MAX4, respectively, increased during cell death. These results suggest that D3 protein in rice, like MAX2/ORE9 in Arabidopsis, is involved in leaf senescence or cell death. |
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Authors:
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Haifang Yan; Hiroaki Saika; Masahiko Maekawa; Itsuro Takamure; Nobuhiro Tsutsumi; Junko Kyozuka; Mikio Nakazono |
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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: Genes & genetic systems Volume: 82 ISSN: 1341-7568 ISO Abbreviation: Genes Genet. Syst. Publication Date: 2007 Aug |
Date Detail:
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Created Date: 2007-09-26 Completed Date: 2008-01-23 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 9607822 Medline TA: Genes Genet Syst Country: Japan |
Other Details:
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Languages: eng Pagination: 361-6 Citation Subset: IM |
Affiliation:
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Graduate School of Agricultural and Life Sciences, The University of Tokyo, Yayoi, Tokyo, Japan. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Cell Aging
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drug effects,
genetics* Cell Death / drug effects, genetics* Cytochrome P-450 Enzyme System / metabolism* Darkness* Gene Expression Regulation, Plant / drug effects, genetics Genes, Plant / drug effects, physiology Hydrogen Peroxide / pharmacology Mutation Oryza sativa / drug effects, physiology* Plant Leaves / drug effects, physiology* |
| Chemical | |
Reg. No./Substance:
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7722-84-1/Hydrogen Peroxide; 9035-51-2/Cytochrome P-450 Enzyme System |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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