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机构地区:[1]西北农业大学基础课部
出 处:《西北植物学报》1994年第5期67-72,共6页Acta Botanica Boreali-Occidentalia Sinica
基 金:国家自然科学基金
摘 要:-0.4MPa和-0.8MPaPEG6000对玉米幼叶延伸生长和生长部位H+分泌有明显的抑制作用,但对生长部位PMH+-ATPase则有不同程度的激活作用,正常水分条件下,Na3VO4和DCCD强烈抑制LER和H+分泌,抑制程度DCCD>Na3VO4,二者使膜透性增加的程度很相近。-0.4MPa PEG胁迫下,Na3VO4对LER和H+分泌的抑制作用不明显,而DCCD仍显著抑制LER和H+分泌;DCCD促进膜透性增加的程度远大于Na3VO4。MPa and-0.8MPa PEG6000 treatments significantly inhibited the fifth maize leaf elongation and H+ extrusion in the growing zone simultaneously, but activated PMH+-AT-Pase to different degrees. In normal water condition, Na3VO4 and DCCD obviously inhibited LER and H-extrusion of the fifth maize leaf, the inhibitory degree of DCCD>that of Na3VO4;two inhibitors had the same effect on relative permeability of membrane. Under the osmotic stress of-0.4MPa PEG, Na3VO4 had no significant effects on LER and H+ extrusion, while DCCD still considerably inhibited LER and H+ extrusion of the fifth maize leaf; DCCD had greater effect on increasing relative permeability of membrane than Na3VO4.
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