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中文摘要：
研究了沙培条件下铝对两个芥菜品种‘雪里蕻’和‘花芥菜’幼苗根系形态和叶生理特性的影响.结果表明,1 mg·L^-1和10 mg·L^-1 Al^3＋在短时间内能够促进两种芥菜根系生长,并降低花芥菜叶内MDA的含量.随着铝处理浓度的增加和处理时间的延长,芥菜根系生长受到抑制,叶内MDA含量增加,同时POD和CAT活性升高,但不同品种芥菜叶内AsA、GSH含量和SOD活性对铝胁迫的反应不同.研究结果说明低浓度铝在短时期内对芥菜生长有促进作用,但处理时间的延长会抑制芥菜的生长,在铝胁迫下芥菜体内抗氧化酶活性升高可以提高其铝适应性.
英文摘要：
Two mustard varieties＇ （Brassica juncea var. crispifolia Bailey） seedlings were cultured in sand which was muhiceps Tsen et Lee and Brassica juncea var. dipped in nutrient solution added different concentrations of aluminum （0, 1, 10, 100 mg · L^-1 Al^3＋ ）. The change of the root morphology and the content of MDA, AsA and GSH as well as POD, CAT and SOD activities in leaves were determined. The result indicated that lower concentrations of aluminum （ 1 mg · L^-1 and 10 mg · L^-1 ） could promote the root growth and decrease the MDA content in two mustard varieties＇ leaves on the 15^th day. With increase of aluminum, the root growth was inhibited and the MDA content in two varieties＇ leaves was increased compared with the control, and the activities of POD and CAT were also promoted obviously, but the response of AsA and GSH content as well as SOD activity in different varieties were different to aluminum stress. It is suggested that lower aluminum concentrations could promote the growth of mustard seedlings in a short time. Antioxidant enzymes played an important part in resisting aluminum.
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