低温处理对紫苏生理指标的影响

目的]研究低温处理对紫苏生理指标的影响,确定造成紫苏叶片低温伤害的时间。方法]将紫苏叶分别低温处理0、12、24、36、48和60 h,并测定其叶绿素、可溶性蛋白质及可溶性糖的含量,并考察2～5℃低温对紫苏叶片生理指标的影响,确定紫苏叶片低温伤害的时间。结果]低温处理48 h能明显减少叶片中叶绿素的含量,而且低温处理60 h的叶绿素含量减少非常明显;低温处理48 h能明显减少叶片中可溶性蛋白质和可溶性糖的含量。结论]低温处理超过48 h,紫苏就会受到伤害;低温处理时间达到60 h时,紫苏受到的伤害程度加重。

Impact of Low-temperature Treatment on Physiology of Perilla frutescens(L.)Britt

Objective] To study the impact of low-temperature treatment on physiology of Perilla frutescens(L.)Britt.,so as to determine the time to cause damage to its leaves.Method] The leaves of P.frutescens were treated at low temperature for 0,12,24,36,48 and 60 h,respectively,and the contents of chlorophyll,soluble protein and soluble sugar in the leaves were determined,the impact of 2-5 ℃ low temperature on the physiological index of P.frutescens leaves,and the time to cause damage to the leaves was determined.Result] The chlorophyll content was obviously decreased under low-temperature treatment for 48 h,especially under low-temperature treatment for 60 h;the low-temperature treatment for 48 h could also decrease the content of soluble protein and soluble sugar in the leaves.Conclusion] When treated under low temperature for over 48 h,the P.frutescens would be damaged;and when treated under low temperature for 60 h,the P.frutescens would be greatly damaged.