植物衰老叶片与成熟果实中叶绿素的降解

 最近20年叶绿素代谢途径研究已经得到深入发展，特别是非荧光叶绿素降解物结构的明确开辟了叶绿素代谢途径研究的道路。部分叶绿素代谢酶在叶绿素降解过程中的作用得到了进一步的论证，部分代谢途径得到了更正与完善。叶绿素代谢产物的生理学作用研究报道丰富了叶绿素代谢的生物学意义，其作用不仅是为了避免代谢毒害和叶绿素结合蛋白降解，还可能与衰老叶片和成熟果实的生存能力有关。

Chlorophyll Breakdown in Plant Senescent Leaves and Ripening Fruit

During the past 20 years，the pathway of chlorophyll breakdown has been deep- investigated，especially the structure elucidation of nonfluorescent chlorophyll catabolites which is crucial for the cognizance of chlorophyll breakdown pathway. The effects of some catabolic enzymes involved in the chlorophyll degradation have been further demonstrated and part of the pathway is revised and completed. Moreover，the physiologic roles of chlorophyll catabolites enrich the significance of chlorophyll breakdown which is not only a prerequisite to detoxify the phototoxic pigments catabolites，but also is relevant to the viability of senescent leaves and ripening frui.