玉米根系活力与耐铝性的关系

铝胁迫可提高耐铝自交系根系还原力,而铝敏感自交系TTC还原强度则显著下降,表明自交系根系TTC相对还原强度与耐铝性具有很好的一致性。耐铝自交系根系活跃吸收面积,尤其是根系活跃吸收面积占总吸收面积的比例相对较高。铝胁迫可维持或略提高铝自交系根系氧化力,而敏感自交系根系氧化力则有所下降,说明耐铝自交系在铝胁迫下仍可维持较高的呼吸代谢活性。铝胁迫可造成玉米自交系伤流量减少,且敏感自交系降幅较大。

The correlation between Al-tolerance and root activity in maize

The correlation between Al-tolerance and root activity were studied with inbred lines and part of their F1 generations in maize, by the means of nutritional cultivation. The results indicated that, under Al stress, root reducing ability of Al-tolerant inbred lines was enhanced while TTC reducing ability decreased in Al-sensitive ones, which shows TTC reducing ability of root is closely consistent with the ability of Al-tolerance. The active absorption area in Al-tolerant inbred lines is much larger that of Al-sensitive ones, whats more, the active absorption area to the total absorption area ratio is even higher compared with the Al-sensitive ones. The oxidbillity of root in Al-tolerant inbred lines could be maintained or slightly increased by aluminum stress while that of sensitive ones decreased. The results suggest that Al-tolerant inbred lines can keep high respiration metabolism when they stressed by Aluminum. The bleeding sap could be decreased in both inbred lines especially Al-sensitive lines when treated with Al.