钙和6-BA对绿豆幼苗耐铝性的影响

Effects of calcium and 6 benzylaminopurine on the aluminum tolerance of mungbean seedlings

通过３个不同的实验研究了Ａｌ胁迫条件下Ｃａ对绿豆幼苗上胚轴的生长、电解质渗漏率、丙二醛（ＭＤＡ）含量、Ａｌ含量及多胺积累的影响。结果显示，Ａｌ处理明显抑制上胚轴的生长，增加其电解质渗漏率和ＭＤＡ含量，降低Ｃａ含量和ＳＯＤ活性，诱导多胺特别是腐胺的积累；增加钙的供应可以减轻Ａｌ对植物的毒害，降低电解质渗漏率、ＭＤＡ和Ａｌ含量，提高Ｃａ含量和ＳＯＤ活性；而外加６－ＢＡ对上胚轴的生长没有影响。表明Ｃａ缺乏是Ａｌ毒害机理之一。

Three solution cultures were conducted to investigate the effects of calcium and 6 benzylaminopurine(6 BA)on the growth of epicotyl in mungbean seedlings,membrane permeability,lipid peroxidation of membrane,concentration of aluminum and accumulation of polyamines in the epicotyl tissues.Al treatment depressed significantly elongation of epicotyl,increased the rate of solute leakage and malondialdehyde concentration,and decreased SOD activity and Ca concentration.Al also induced accumulation of polyamines in the epicotyl.Under Al treatment condition,increasing Ca supply had a beneficial effect on epicotyl and decreased the rate of solute leakage and the concentrations of malondialdehyde and Al significantly,increased SOD activity.It was suggested that Ca could alleviate the Al toxicity.But,the exogenous application of 6 BA had no significant effect on the growth,rate of solute leakage and malondialdehyde concentration.