喷施溴氰菊酯对茶树主要特征性次生代谢物含量的影响

Effect of Deltamethrin on the Main Secondary Metabolites in Tea Plant(Camellia sinensis)

研究了不同浓度溴氰菊酯对茶树叶片中主要特征性次生代谢物含量的影响以及时间效应。结果表明:处理后2 d,3种浓度的处理皆引起茶多酚含量显著低于对照,且随着处理浓度的增加降低幅度愈大,处理后8 d,低浓度和推荐浓度处理的叶片降低幅度均达到最大,分别为19.4%和20.3%;喷施后2-8 d,3种浓度处理皆导致茶氨酸含量明显低于对照,低浓度和高浓度组均是在处理后8 d降低幅度最大,分别达到18.3%和22.3%;喷施后2 d和4 d,低浓度的处理诱导咖啡碱含量显著升高,而推荐浓度与高浓度的处理却导致咖啡碱含量显著低于对照;在处理后10 d,不同浓度处理的叶片中3种特征性代谢化物含量与对照相比,均相差不大。

This study investigated the effect of different concentration of dehamethrin on the main secondary metabolites in tea leaves. The results showed after spraying deltamethrin at three concentrations for two days, the polyphenols in leaves was significantly lower than controls. In the higher deltamethrin concentration treatment, the larger reduction was happened. However, the maximum drops in recommended concentrations group and low concentrations group（19.4% and 20.3%） were both happened on the 8th day after spraying. For the theanine analysis, treatment after 2 to 8 days, theanine in the leaves of the 3 Treatment groups were obviously lower than that of the control group. Also theanine reached at the maximum drops（22.3% and 18.3%） on the 8th day after spraying both in the high and low concentrations group. At last, in the 2-day-treatment and 4-day-treatment, the content of caffeine went up remarkably in low concentrations group. However, the content of caffeine in the tea leaves was obviously lower than that of control group which was found both in the high concentrations group and recommended concentrations group. In general, three main secondary metabolites were shown little changes in different concentrations compared with the control group treatment after 10 days.