Al3+对玉米幼苗生长的影响

分别用含有0、20、100、200、500 mg/L 5种浓度铝离子的1/2 MS培养液处理玉米幼苗12天。观察其生长状况并测定生长量、可溶性糖和蛋白氮。结果表明:含铝离子20mg/L培养液处理下对植株无明显影响,而在100mg/L的培养液处理下对植株生长有显著的抑制作用,对根部的作用尤为明显。随铝离子浓度的升高,含水量降低,A l3+浓度与地上部分、根含水量之间的相关极显著;A l3+胁迫能诱导可溶性糖的积累,蛋白质和可溶性糖含量随着A l3+浓度增加而增加。

Effects of aluminum on growth of maize seedlings

Maize seedlings were cultured in five 1/2MS culture solutions (without sucrose and hormone) with different concentrations of Al~(3+)(0,20,100,200,500mg/L) for 12 days. Their growing states ware observed, and their biomass, soluble sugar and protein ware determined. The results showed that 20mg/L of Al~(3+) has no effect,but 100mg/L of Al~(3+) has visible inhibition on above-ground sections and has much more visible inhibition on roots. With the increase of Al~(3+) concentration and decrease of water content, there is a visible relationships between Al~(3+) concentrations and percentage of water. The percentage of soluble sugar and protein increaes when the Al~(3+) concentration increases.