低温胁迫下茶树喷施6-BA的生理指标变化

Physiological Indexes Changes for Spraying 6-BA on Tea Trees under Low Temperature Stress

6-BA(6-苄氨基嘌呤)是广谱型植物生长调节剂,能够提高植物的抗逆性。为探索6-BA对寒害后茶树的修复机理,以福鼎大白茶茶苗为试验对象,于入冬前后采用单因子试验设计,研究6-BA不同浓度(10mg/L,25mg/L,50mg/L,100mg/L)喷施对茶树抗寒性相关生理指标的影响。结果表明:各处理对茶树的叶绿素、可溶性糖和可溶性蛋白含量,SOD、POD和CAT的酶活性,丙二醛和脯氨酸含量均有不同程度的影响。其中,以50mg/L 6-BA处理茶树的生理指标变化最大。说明,喷施6-BA可以提高茶树的抗寒性,浓度为50mg/L时效果最好。

6-BA（6-benzyl amino purine）is a broad-spectrum type plant growth regulator,which can improve the resistance of plants.In order to research 6-BA for the repair mechanism of tea tree after cold injury,the authors choose tea plantation of Fudingdabaicha as experiment object,Before and after the winter by using single factor experiment design,the effects of different concentrations of 6-BA（10mg/L,25mg/L,50mg/L,100mg/L）spraying on physiological indexes related to cold hardiness were studied.Results：Contents of chlorophyll,soluble sugar and soluble protein,activities of SOD,POD and CAT and contents of MDA and proline of different treatments changed in varying degrees.Among them,50mg/L6-BA treatment showed the largest physiological indexes change.As a result,spraying 6-BA can improve the cold hardiness of tea tree,and 50mg/L 6-BA was of the best effect.