盐胁迫下黄腐酸对大豆种子萌发及抗氧化酶活性的影响

Effects of Fulvic Acid on Soybean Germination and Antioxidant Enzymes Activities under Salt Stress

为研究盐胁迫条件下黄腐酸(FA)对大豆种子萌发及抗氧化酶活性的影响,以微生物降解褐煤产生的FA为实验材料,研究了其在大豆萌发过程中对根部过氧化氢酶(CAT)和过氧化物酶(POD)活性及丙二醛(MDA)含量的影响。结果表明,盐胁迫条件下,低浓度(100、200 mg/L)的FA会提高大豆种子萌发过程中根部CAT及POD的活性,而高浓度(1000 mg/L)的FA作用恰恰相反。低浓度(100 mg/L)的FA降低大豆种子萌发过程中根部MDA的含量。综上得出,100 mg/L的FA可以提高大豆种子萌发过程中对盐胁迫的适应力。

In order to study the effects of fulvic acid （FA） on germination and antioxidant enzymes activity of soybean seed under salt stress, a fulvic acid produced by microbial degraded lignite was used as experimental material. The activities of peroxidase （POD）, catalase （CAT）, and the contents of malondialdehyde （MDA） in soybean root in the process of soybean germination were analyzed. Results showed that low concentration of FA （100, 200 mg/L） increased the activities of POD and CAT in soybean root under salt stress. However, high concentration FA （1000 mg/L） had the opposite effect. The low concentration of FA （100 mg/L） reduced the the roots of MDA contents in soybean seed germination process. These results indicated that 100 mg/L fulvic acid could improve the adapt ability to salt stress during soybean seed germination.