胡敏酸对苯丙烯酸胁迫下黄瓜种子萌发特性的影响

以黄瓜（Cucumis Sativus L.）种子为材料，研究胡敏酸（Humic Acid，HA）对苯丙烯酸（Cinnamic Acid，CA）胁迫下黄瓜种子萌发的影响及其机理。结果表明： CA对黄瓜种子萌发有明显的抑制作用， 且抑制程度随CA浓度（0.10～1.0 mmol/L）的增加而提高。 CA胁迫下， 黄瓜种子总淀粉酶、 α-淀粉酶、 β-淀粉酶及蛋白酶活性降低， 种子活力、 种子物质消耗率下降，发芽势降低。25 mg/L HA处理可以缓解CA胁迫对种子萌发的抑制作用，表现为发芽势提高，种子活力、α-淀粉酶、β-淀粉酶和蛋白酶活性以及种子物质消耗率提高。

Effects of Humic Acid on the Germination Properties of Cucumis Sativus L. Seeds under Cinnamic Acid Stress

Cucumber(Cucumis Sativus L.)seeds were used to investigate the effects of humic acid on improving the germination properties of cucumber under cinnamic acid(CA)stress.The results showed CA obviously restrained cucumber seeds germination,and the restraint degree was increased with the concentration of CA(0.10-1.0mmol/L)increasing.Under CA stress,cucumber seed germination energy,seed vigor,amylase,α-amylase,β-amylase,protease activity as well as and the consumption rates of seed was decreased.HA could relieve the inhibition of CA on seed germination.Compared with the same concentration CA treatments,25mg/L HA increased germination energy,seed vigor,amylase,α-amylase,β-amylase and protease activity as well as the consumption rates of seed.