植物衰老期间生理生化变化的研究进展

Advances in studies on physiological and biochemical changes during plant senescence

植物衰老是受内外因素控制的细胞有序降解并最终导致死亡的过程,衰老期间会出现与正常生长阶段不同的生理生化变化。植物衰老引起的各种功能的下降极大地限制了作物产量潜力的发挥,种子贮存过程中的衰变、逆境条件下植株的早衰、果蔬采后贮藏衰老导致货架寿命的缩短等均会造成极大的经济损失。研究植物衰老的生理机制及其调控具有十分重要的意义。综述了有关植物衰老时生理生化变化方面的近期研究进展,以利于人们对植物衰老生理的更深入的了解。

Plant senescence is a programmed cell degradation and death process ultimately controlled by inter-nal and external factors. During senescence of plant, the changes in physiology and biochemistry are different from that of the normal growth stage. Decline in many functions triggered by senescence restrict yield potential of crops extremely. Senescence of stored seed, premature senescence of plant in stress and shorten of shelf life lead by har-vest senescence of fruit and vegetable will result in enormous economic loss. It is very important to study the physio-logical mechanism and regulation of plant senescence. The recent advances in studies on physiological and bio-chemical changes during plant senescence were summarized. It will help to know more clearly the physiology of plant senescence.