渗透胁迫对绿豆下胚轴延伸生长及H^+分泌的影响  

EFFECTS OF SOMOTIC STRESS ON ELONGATION GROWTH AND H + EXTRUSION OF MUNGBEAN SEEDLING HYPOCOTYL

作　　者：龚月桦[1] 王俊儒[1] 高俊凤[1] 荆家海[1] 

机构地区：[1]西北农业大学基础科学系

出　　处：《西北植物学报》1998年第4期527-532,共6页Acta Botanica Boreali-Occidentalia Sinica

基　　金：国家自然科学基金

摘　　要：－０．９ＭＰａ甘露醇渗透胁迫处理，明显抑制绿豆幼苗下胚轴延伸生长和生长部位Ｈ＋分泌，而且随胁迫时间延长抑制程度增大。ＰＭＨ＋－ＡＴＰａｓｅ活性在渗透胁迫下先下降而后升高并超过对照水平。胁迫处理也使绿豆幼苗下胚轴生长区相对含水量（ＲＷＣ）持续下降。在渗透胁迫下，绿豆下胚轴延伸生长与ＲＷＣ和Ｈ＋分泌之间都存在正相关性；而Ｈ＋分泌和ＰＭＨ＋－ＡＴＰａｓｅ之间，延伸生长和ＰＭＨ＋－ＡＴＰａｓｅ之间无相关性。With -0.9 MPa D Mannitol treatment,the elongation growth (LER) and H + extrusion of mung bean seedling hypocotyl was significantly inhibited,and the inhibition was even more serious with treatment time.The PMH + ATPase activity under osmotic stress decreased first,then increased even above the control,maintaining in a high level.The RWC also declined continually with treatment.Under Osmotic stress,the RWC and H + extrusion both had positive correlation with LER,but the relationship between H + extrusion and PMH + ATPase activity,and that between LER and PMH + ATPase acti vity were not so correlative.These suggested that osmotic stress changed the role of PMH + ATPase in the processes of H + extrusion and elongation growth.

关 键 词：绿豆 渗透胁迫 延伸生长 H^+分泌 PMH^+-ATPase 

分 类 号：S522.01[农业科学—作物学] Q945.3[生物学—植物学]