二氯喹啉酸对烤烟种子萌发及幼苗生长的影响

为减轻土壤中残留的二氯喹啉酸对烟草种子萌发和幼苗生长的危害,采用不同质量浓度的二氯喹啉酸对烟草种子进行浸种、培养,一定时间后进行种子萌发和生理指标测定。结果表明,随着二氯喹啉酸质量浓度的增高,烤烟种子的发芽势、发芽指数及活力指数均下降,且差异显著,烤烟种子的发芽率差异不显著;幼苗高度和根长均降低,鲜质量和干质量均减少,可溶性蛋白含量降低;烟苗中的过氧化物酶(POD)活性增强,超氧化物歧化酶(SOD)活性减弱,膜脂过氧化产物丙二醛(MDA)含量升高。

Effects of Quinclorac on the Germination of Seed and Primary Seedling Growth of Flue-cured Tobacco

Residual soil quinclorac effects on tobacco yield and quality significant.In order to provide a theoretical basis of reduce quinclorac on the hazards of tobacco seeds and seedlings,different concentrations of quinclorac were treated on tobacco seed soaking and training,the seed germination and physiological indicators were measured after a certain period of time.The results showed that,with the quinolinic concentration increasing,the seed germination energy,germination index and vigor index decreased significantly.However,flue-cured tobacco seed germination rate was not obvious influenced.The seedling height and root length,the fresh weight and dry weight were reduced,the soluble protein content were decreased.The POD activity and the content of MDA increased,and the SOD activity decreased.