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| 1 | Light Intensity Affects Chlorophyll Synthesis During Greening Process by Metabolite Signal from Mitochondrial Alternative Oxidase in Arabidopsis显示文摘Although mitochondrial alternative oxidase(AOX)has been proposed to play essential roles in high light stress tolerance,the effects of AOX on chlorophyll synthesis are unclear.Previous studies indicated that during greening,chlorophyll accumulation was largely delayed in plants whose mitochondrial cyanide-resistant respiration was inhibited by knocking out nuclear encoded AOX gene.Here we show that this delay of chlorophyll accumulation was more significant under high light condition.Inhibition of cyanide-resistant respiration was also accompanied by the increase of plastid NADPH/NADP^+ratio,especially under high light treatment which subsequently blocked the import of multiple plastidial proteins,such as some components of the photosynthetic electron transport chain,the Calvin-Benson cycle enzymes and malate/oxaloacetate shuttle components.Over expression of AOXla rescued the aoxla mutant phenotype,including the chlorophyll accumulation during greening and plastidial protein import.It thus suggests that light intensity affects chlorophyll synthesis during greening process by a metabolic signal,the AOX-derived plastidial NADPH/NADP^+ratio change.And our results thus revealed a molecular mechanism of chloroplast-mitochondria interactions. | ZHANG Dawei YUAN Shu 徐飞 ZHU Feng YUAN Ming YE Huaxun GUO Hongqing LV Xin YIN Yanhai 林宏辉 | 2015 | 武汉生物工程学院学报2015，，3： | 2 |
| 2 | 拟南芥CAS基因的生物信息学分析及超表达载体构建显示文摘对拟南芥氰丙氨酸合酶(Cyanoalanine synthase,CAS)基因进行了生物信息学分析,并构建了CAS合酶基因的超表达载体,以期为后续功能研究奠定基础。生物信息学分析结果表明,编码拟南芥CAS合酶的CYS-C1和CYS-D1基因含有10个外显子和9个内舍子,定位于3号染色体,而CYS-D2基因有9个外显子和8个内含子,定位于5号染色体。三个基因编码的蛋白氨基酸序列相似度较高,CYS-C1蛋白偏碱性且主要在线粒体中起作用,而CYS-D1和CYSD2蛋白偏酸性,主要在细胞质中起作用;通过RT-PCR扩增了拟南芥CYS-C1,CYS-D1和CYS D2基因片段,并构建了超表达载体pBI121-35S-CYS-C1,pBI121-35S-CYS-D1和pBI121-35SCYS-D2,经检测重组质粒已转化到农杆菌GV3101中。 | 余璐璐 阳敦润 曹中权 刘龙山 罗璐 徐飞 | 2015 | 武汉生物工程学院学报2015，0，4： | 0 |
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