烟叶成熟过程相关基因变化及其叶绿素降解

The Changes of Related Genes Expression and Chlorophyll Degeneration during Tobacco Leaf Senescence

烤烟叶片成熟过程与衰老是烟草发育的重要阶段,是一个复杂和高度调控的过程,涉及衰老相关基因的调控表达和叶绿体的分解,也是烟草质量和品质形成的关键时期,因此其成为烟草生产和研究的重要时段。介绍了烟叶衰老过程相关基因的表达变化和叶绿素分解的过程,为从分子水平定义烟叶的成熟度提供理论依据。

Leaf senescence of flue-cured tobacco is the final stage of plant development. Senescence also is a complex and highly regulated process that involves a decline in photosynthesis, dismantling of chloroplasts, and degradation of macromolecules such as proteins, nucleic acids, and lipids. This review mainly introduces the process of leaf senescence through the three parts： initiation, degeneration, and terminal of leaf senescence pathway. To sort out the tobacco-related genes change that show increased or decreased expression during the leaf senescence. At the same time, chlorophyll breakdown in the regulation of senescence are discussed.