Photosynthetic characterization at different senescence stages in an early senescence mutant of rice Oryza sativa L.
文献类型: 外文期刊
作者: Wang, L. F. 1 ; Chen, Y. Y. 1 ;
作者机构: 1.CATAS, Rubber Res Inst, State Key Lab Incubat Base Cultivat & Physiol Tro, Minist Agr,Key Lab Rubber Biol, Danzhou 571737, Hainan, Peoples R China
关键词: chlorophyll;T-DNA;photosynthetic activity;photosynthetic characterization;progressing death;brown striation;chloroplast thylakoid membrane structure;leaf senescence process stage
期刊名称:PHOTOSYNTHETICA ( 影响因子:3.189; 五年影响因子:3.38 )
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收录情况: SCI
摘要: An early senescence (es) mutant of rice Oryza sativa L. with progressing death of most of leaves before heading stage was identified in the field in Hainan province. After tillering stage, the brown striations were found in the base of green leaves randomly, and then expanded to whole leaves. No fungi, bacteria, and viruses were detected in the brown striations suggesting that it was a genetic mutant. The ultrastructure of leaf cells at the site of brown striations showed breakdown of chloroplast thylakoid membrane structures and other organelles, and condensation of the cytoplasm at severe senescence stage. The photosynthetic activity and chlorophyll (Chl) contents decreased irreversibly along with leaf senescence process.
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