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Changes in Violaxanthin Deepoxidase Activity and Unsaturation of Thylakoid Membrane Lipids in Indica and Japonica Rice Under Chilling Condition and Strong Light

文献类型： 外文期刊

作者： Ji, BH 1 ; Cao, YY 2 ; Xie, HS 2 ; Zhu, SQ 2 ; Ma, Q 2 ; Jian, DM 2 ;

作者机构： 1.Jiangsu Acad Agr Sci, Inst Agrobiol Genet & Physiol, Nanjing 210014, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agrobiol Genet & Physiol, Nanjing 210014, Peoples R China; Nantong Normal Coll, Dept Life Sci & Technol, Nantong 226007, Peoples R China

关键词： thylakoid membrane lipids;xanthophyll cycle;violaxanthin deepoxidase;arrhenius plotting;rice

期刊名称：ACTA BOTANICA SINICA （ 影响因子：0.599； ）

ISSN：

年卷期：

页码：

收录情况： SCI

摘要： To explore the differences of sensitivities to chilling and strong light in indica and japonica rice (Oryza sativa L.), the changes in unsaturation of thylakoid membrane lipids and xanthophyll cycle were studied under chilling condition and strong light. The contents of unsaturated fatty acids of thylakoid membrane lipids decreased and that of the saturated ones increased with the time of chilling and strong light treatment, resulting in the reduction of the index of unsaturation of fatty acids (IUFA). The activity of violaxanthin deepoxidase (VDE), a key enzyme of xanthophyll cycle, also reduced. The content of violaxanthin (V) increased, and the contents of antheraxanthin (A) and zeaxanthin (Z) decreased, the ratio of (A+Z)/ (A+Z+V) decreased correspondingly. Arrhenius analysis showed that VDE was sensitive to both chilling and unsaturation level of thylakoid membrane lipids. Correlation analysis showed that there was distinctly positive relationships between IUFA of thylakoid membrane lipids and the activity of VDE, Fv/Fm, and D_1 protein content. Lower IUFA values, less fluidity and stability of thylakoid membrane lipids, lower VDE activity and (A+Z)/(A+Z+V) ratio were found in indica rice cv. Shanyou 63 than in japonica rice cv. 9516 under chilling and strong light.

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