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以黄瓜枯萎病为研究对象,通过盆栽试验探讨了不同浓度稀土铈(CeCl3)对接种黄瓜枯萎病菌后黄瓜植株发病情况、生长状况、相关防御酶活性的影响。结果表明:与不添加CeCl3的对照相比,施用CeCl3降低了黄瓜枯萎病发病率和病情指数,促进了植株生长发育,提高了防御酶活性;随着CeCl3浓度的增大,促进效果先增强后减弱,其中以200mg·L-1处理效果最好,黄瓜各生长指标显著提高,叶绿素含量、根系活力、脯氨酸含量分别比对照提高85.91%、60.75%、55.77%,过氧化物酶(POD)、多酚氧化酶(PPO)、苯丙氨酸解氨酶(PAL)活性分别比对照提高49.29%、31.50%、80.00%,丙二醛含量比对照降低61.67%。
Taking Cucumber Fusarium wilt as the research object, the effects of different concentrations of cerium (CeCl3) on cucumber cucumber Fusarium oxysporum f. Sp. Cucumber inoculation, growth status and relative defense enzyme activity were studied by pot experiment. The results showed that CeCl3 decreased the morbidity and disease index of cucumber wilt and promoted the growth and development of cucumber plants and increased the activity of defense enzymes. With the increase of CeCl3 concentration, the promotion effect increased first (200mg · L-1), cucumber growth index was significantly increased, chlorophyll content, root activity and proline content were increased by 85.91%, 60.75%, 55.77%, POD PPO and PAL increased by 49.29%, 31.50% and 80.00%, respectively, and MDA content decreased by 61.67% compared with the control.