质膜H~＋－ATP酶在玉米叶片渗透调节中的作用  

POSSIBLE ROLE OF PMH￣+ -ATPase IN THE OSMOTIC ADJUSTMENT OF MAIZE LEAF

作　　者：龚向群[1] 王旭[1] 荆家海[1] 

机构地区：[1]西北农业大学

出　　处：《西北植物学报》1996年第6期36-40,共5页Acta Botanica Boreali-Occidentalia Sinica

摘　　要：干早胁迫下，玉米幼叶生长部位质膜Ｈ＋－ＡＴＰ酶活性显著上升，游离脯氨酸、可溶性糖和无机离子亦同时在玉米叶片生长部位大量积累，二者之间呈明显的正相关．质膜Ｈ＋－ＡＴＰ酶的专一性抑制剂Ｎａ３ＶＯ４在干旱胁迫下强烈抑制游离脯氨酸的积累，说明ＰＭＨ＋－ＡＴＰａｓｅ参与了玉米叶片的渗透调节过程．The PMH+-ATPase activity increased considerably under osmotic stress,at thesame time a great accumulation of free Pro,soluble sugars and some inorganic ions was built in the growing region of maize leaf.There.was an obvious direct relationship between such two phenomena.The exclusive inhibitor-Na3VO4 greatly inhibited the increase of free Pro under osmotic stress.It seems that the PMH+-ATPase was involved in the osmotic adjustment of maize leaf.

关 键 词：质膜H^+-ATP酶 渗透调节 脯氨酸 Na₃VO₄ 玉米 

分 类 号：Q945[生物学—植物学]