水杨酸对铬胁迫下大豆种子萌发的影响

Effects of Salicylic Acid on Germination of Soybean Seed under Chromium Stress

以"日本青"大豆(Glycine max L.)种子为材料,研究了铬对大豆种子萌发的胁迫作用及水杨酸(Salicylic acid,SA)对铬胁迫的缓解效应。结果表明:在0～200 mg·L-1铬浓度范围内,随铬胁迫浓度的增加,大豆种子的发芽率、发芽指数和活力指数降低,大豆下胚轴丙二醛含量和相对电导率增加;铬胁迫显著(P<0.05)抑制大豆种子萌发的浓度为100 mg·L-1。0.05 mmol·L-1SA可缓解铬对大豆种子萌发的毒性。

The paper studied the effects of chromium stress on germination of soybean（Glycine max L.）cv.Ribenqing and the meditative effect of SA under hydroponic cultural conditions.The results showed that the germination rate,germination index and vigor index of soybean seed decreased,the MDA content and the relative electrical conductivity of soybean hypocotyls increased with the increase of chromium concentration in range of 0-200 mg·L-1Cr6＋.The germination of soybean seed was significantly（P〈0.01）inhibited when the concentration of chromium was 100 mg·L-1.0.05 mmol·L-1 SA could alleviate the toxicity of soybean under the chromium stress.