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比较了水杨酸 (SA) ,对氨基苯酚 (p -AP)、硝酸镍、百草枯 (PQ)、氧化铜和铜试剂对水稻幼苗抗白叶枯病的诱导抗病作用、它们的最佳诱导浓度和最佳诱导时期 .它们的最佳诱导浓度分别为 0 .0 5mmol/L、0 .5mmol/L、2 .2mmol/L、0 .1 5mg/L、0 .3mmol/L和 0 .5mmol/L .除SA和PQ的最佳诱导期分别为处理后第 2天和第 4天外 ,其余因子均在处理后第 3天 .在最佳浓度下 ,SA、p -AP、硝酸镍、PQ、氯化铜和铜试剂的相对诱导效果 (局部抗性 )分别为 1 9.7%、3 9.5%、69.6%、4 6.1 %、1 2 .3 %和 1 8.9% .硝酸镍、PQ和P -AP均有明显的系统诱导抗病作用 .三种因子均在处理后第 4天表现出最大的系统诱导抗病效果 ,相对诱导效果分别为 4 2 .9%、3 5.5%和 2 7.6% .并且 ,在处理后第 8天这种诱导作用也较明显 .
The effects of salicylic acid (SA), p-aminophenol (p-AP), nickel nitrate, paraquat (PQ), cupric oxide and copper reagents on resistance induced resistance to bacterial leaf blight in rice seedlings were compared, The optimal inducing concentration and the best inducing time were 0. 05mmol / L, 0.5mmol / L, 2.2mmol / L, 0.15mg / L and 0.3mmol / L, respectively. 5mmol / L. Except for SA and PQ, the best induction period was on the 2nd and 4th days after treatment, all other factors were on the 3rd day after treatment.At the optimum concentration, SA, p-AP, nickel nitrate, The relative induction effects (local resistance) of PQ, copper chloride and copper reagents were 1 9.7%, 3 9.5%, 69.6%, 4 6.1%, 12.3% and 18.9%, respectively. Nickel nitrate, PQ and P -AP were significantly induced by the system.All the three factors showed the largest system-induced disease resistance effect on the 4th day after treatment, the relative induction effects were 42.9%, 35.5% and 26.6% Moreover, this induction was also evident on the 8th day after treatment.