钙对生长素诱导的玉米胚芽鞘切段延长生长的影响  

THE EFFECT OF Ca￣(2+) ON THE AUXIN INDUCED ELONGATION OF MAIZE COLEOPTILE SEGMENT

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41-45,共5页Acta Botanica Boreali-Occidentalia Sinica

摘　　要：１０μｇ／ｇ的ＩＡＡ溶液强烈地促进玉米胚芽鞘切段的延长生长和质子分泌，但这两种效应的启动时间有别．Ｃａ２＋在高浓度下（２—５ｍｍｏｌ／Ｌ）强烈抑制ＩＡＡ诱导的延长生长，但在低浓度下（０．５ｍｍｏｌ／Ｌ）则有轻微的促进作用．ＩＡＡ增大质膜相对透性，而Ｃａ２＋则有稳定膜的作用，且适宜的浓度较低（０．５ｍｍｏｌ／Ｌ）．IAA solution of 10μg/g greatly promoted the elongation and proton extrusion of maize coleoptile segments.But the IAA induced elongation and H+ extrusion had different time courses.Ca2+ in high concentrations(2-5mmol/L) considerably inhibited IAA induced elongation of maize coleoptile segments,but low concentration of Ca2+ (0.5mmol/L) slightly inceeased the elongation.IAA increased the relative permeability of plasma membrane,and Ca2+ stablized the plasma membrane,the favourable concentration of Ca2+ for which is low(0.5mmol/L).

关 键 词：钙 生长素 胚芽鞘 延长生长 玉米 

分 类 号：Q945[生物学—植物学]