喷施多效唑对谷子生长及生理特性的影响

Effects of Paclobutrazol on Growth and Physiological Properties of Foxtail Millet

为研究喷施多效唑对谷子生长发育及生理特性的影响,以‘晋谷21号’和‘张杂谷5号’为研究材料,采用随机区组设计,苗期叶面喷施150、300、600、1200 mg/L多效唑,清水作对照。结果表明,适宜浓度的多效唑处理可有效提高谷子叶片叶绿素、可溶性蛋白和可溶性糖含量,显著增强SOD、POD和NR活性,有效降低谷子株高和MDA含量。与对照组相比,8月21日,300 mg/L多效唑处理‘晋谷21号’和‘张杂谷5号’株高分别降低4.75%和11.75%,叶绿素含量分别提高41.8%和32.5%,SOD活性分别提高11.5%和13.9%,POD活性分别提高37.4%和25.9%,MDA含量分别降低21.8%和16.8%,NR活性分别提高13.56%和16.18%,可溶性蛋白含量分别提高3.97%和5.37%,可溶性糖含量分别提高30.8%和24.2%。多效唑比较适宜浓度为300 mg/L。

Paclobutrazol with the concentrations 150,300,600,1200 mg/L were applied on’Jingu 21’and’Zhangza 5’in the seedling stage to study the effects on development and physiological properties of foxtail millet,with distilled water as control.The randomized blocks design was adopted.The results showed that spraying leaves with paclobutrazol could significantly improve the content of chlorophyll,soluble protein and soluble sugar.The SOD activity,POD activity and NR activity were significantly enhanced,but the plant height and MDA content were reduced.Compared with the control,on August 21st,spraying leaves with 300 mg/L,the plant height decreased by 4.75%and 11.75%,the chlorophyll content increased by 41.8%and 32.5%,the SOD activity increased by 11.5%and 13.9%,the POD activity increased by 37.4%and 25.9%,the MDA content decreased by 21.8%and 16.8%,the NR activity increased by 13.56%and 16.18%,the soluble protein content increased by 3.97%and 5.37%,the soluble sugar content increased by 30.8%and 24.2%,respectively.Therefore,the optimum paclobutrazol concentration for controlling the growth of foxtail millet is300 mg/L.