铝对荞麦和金荞麦根系分泌物的影响

以荞麦和金荞麦为实验材料，用砂培方法研究Al胁迫下荞麦和金荞麦根系分泌电解质、糖和氨基酸的变化。结果表明，Al胁迫条件下，电解质外渗率、糖类随Al^3 浓度升高而增加；在低浓度Al^3 作用下，随处理浓度的升高，氨基酸分泌量增加，当处理浓度高于相应浓度时，氨基酸分泌量随浓度升高而减少。Al胁迫使荞麦和金荞麦根系分泌物的种类和浓度发生改变，与其缓解Al毒害相关。

Effect of Aluminum on Root Exudates of Fagopyrum Eschlentum and Fagopyrum Cymosum

The study was dealt with the responses of Fagopyrum eschlentum and Fagopyrum cymosum root exudates to aluminum stress with sand culture medium. Exudation of electrolyte, sugar and amino acids were measured with four treatments of aluminum (0, 0.05, 0.1,0.2 g/kg Al~(3 )). The results that the exudation of electrolyte and soluble sugar increased with increase of aluminum treatment concentration. The change of exudation of amino acid was similar with the exudation of electrolyte and soluble sugar when the Al treatment concentration was low than 0.1 g/kg, but it was reverse while when the Al treatment concentration was high than 0.1 g/kg. These results indicated that the root exudates of Fagopyrum eschlentum and Fagopyrum cymosum altered with different aluminum treatment and the changes of root exudates under the stress of aluminum maybe relate with mitigation of aluminum toxicity.