摘要
激素的原初作用一般与细胞膜的生理变化密切相关 ,ABA使细胞膜的透性增加 ,ZT对细胞膜的影响较小 ;二者对于膜的离子外渗的影响同透性一样 ;对于叶绿体膜上的 Ca+2 -ATPase、Mg+2 - ATPase,ABA抑制其活性 ,ZT则促进其活性的增加。因此 ,二者可影响叶绿体膜内外离子的交换 ,改变膜内外质子的平衡 ,ABA降低光下叶绿体悬浮介质的 p H,降低膜的电势值 ,ZT则增加其电势。两种激素对于膜生理变化的影响是其影响植物细胞衰老、叶绿体光合作用的机制之一。
What the primary effects of hormones closely related to physiological changes of membrane.The ABA increased permeability of cell membrane,and the ZT had less effect on it.The both hormones affects on leakage of the ion inside cell identified with that of their affects on permeability of protoplasm membrane.The ABA inhabited activity of Ca +2 ATPase and Mg +2 ATPase in chloroplast membrane,the ZT promoted it.Therefore,the both affected ion exchange and changed ion balance inside and outside of chloroplast membrane.ABA reduced pH of chloroplast suspension and dropped electrical potential of chloroplast membrane,ZT increased this electrical potential.Effects of both hormones on changes of membrane physiology on plant cells may be one of reason of their affects on senescence of plant cells and photosynthesis of chloroplast.
出处
《西北植物学报》
CAS
CSCD
2002年第6期1360-1364,共5页
Acta Botanica Boreali-Occidentalia Sinica
基金
国家基础研究发展规划资助项目 ( G19980 10 10 0 )
