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1、捐建农林大学二00七届硕士学位论文部总铝含量是茎部的几十倍以上，这也说明根部是铝对杉木幼苗害毒的最初部位．仅在铝胁迫45d时在根中检羽倒含量很低的铝络合物，铝络台物是直接进入植物体内，还是进入体内的～。与伴内已经存在的DL-异柠檬酸吖．内酯作用还需要进一步研究．经过铡定，培养液中DL-异柠檬酸吖．内酯浓度未见明显变化，估计进入植物体内的络合物含量少于0．0002％，而培养液中铝在DL-异柠檬酸千内酯存在条件下约70％络合物形式存在．由此可见，与铝络合形成难以被植株体吸收的络合物可能是DL-异柠檬酸吖-内
2、酯降低活性铝对杉木幼苗毒害作用的主要机制．8、通过红外吸收光谱法和核磁共振技术进一步对DL-异柠檬酸吖．内酯与铝的络合物的结构进行鉴定，发现是2个DL-异柠檬酸一y．内酯失去羟基上的氢与1个AI“与形成较稳定络合物．关键词：杉木；铝毒害：DL-异柠檬酸一Y一内酯；络合物；降解机理ⅢDL一异拧檬酸一Y一内酯降解杉木铝毒害的作用机理研究MechanismsofAluminumDetoxificationinChineseFirbyDL·-hydroxy-1,2,3··proanetracarboxylicA
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