中文摘要：

交替氧化酶是植物抗氰呼吸途径重要的末端氧化酶。在植物转绿过程中,AOX缺陷突变体表现出叶绿素积累延迟的现象。最近的研究表明。这种叶绿素积累的延迟在高光条件下更为显著,主要原因在于相关质体酶的转运受阻,而这些酶可以催化四吡咯或叶绿醇的生物合成。同时,抑制抗氰呼吸也伴随着质体NADPH/NADP＋比率的增加,尤其是在高光处理条件下。因此表明,光照强度可以通过一个代谢信号在植物转绿过程中影响叶绿素的合成,而这个代谢信号很可能与AOX改变质体中NADPH/NADP＋的比率有关。总之,AOX介导的线粒体和叶绿体之间信号传导对维持光合作用能力至关重要。

英文摘要：

Alternative oxidase（ AOX） plays a key role in cyanide（ CN）-resistant respiratory pathway,and thatchlorophyll accumulation will be largely delayed in AOX knockout mutant. Recent studies showed that this delay of chlorophyll accumulation was more significant under the high light condition and mainly attributed to the blocked import of the concerned plastidial enzymes,a catalyzer of tetrapyrrole or phytol biosynthesis. Inhibition of cyanideresistant respiration was also accompanied by the increase of plastid NADPH/NADP＋ratio,especially under the high light treatment. It thus suggests that light intensity affects chlorophyll synthesis during greening process by a metabolic signal,which may be attributed to the AOX-derived plastidial NADPH/NADP ＋ ratio change. Therefore,AOX-derived signal between mitochondrion and chloroplast is essential for facilitating and sustaining the photosynthetic capacity.