不同红光与远红光比值对低温条件下茶树光合荧光特性及PIFs的影响  

Effects of Red to Far-red Light Ratios on Photosynthetic Fluorescence Characteristics and PIFs of Tea Plants under Low Temperature Conditions

作　　者：肖富良 李解 唐敏[1] 赖谦 翟秀明[1] XIAO Fuliang;LI Jie;TANG Min;LAI Qian;ZHAI Xiuming(Tea Research Institute of Chongqing Academy of Agricultural Sciences/Chongqing Engineering Technology Research Center of Tea Industry,Chongqing 402160,China;Agriculture and Rural Bureau of Gulin County,Gulin,Sichuan 646500,China)

机构地区：[1]重庆市农业科学院茶叶研究所/重庆市茶叶工程技术研究中心,重庆402160 [2]古蔺县农业农村局,四川古蔺646500

出　　处：《福建农业学报》2025年第1期63-70,共8页Fujian Journal of Agricultural Sciences

基　　金：重庆市永川区自然科学基金项目(2023yc-jckx20050);重庆市农业科学院青年专项基金项目(KYLX20240500067);重庆市现代农业产业技术体系“茶叶创新团队”项目(CQMAITS202308);重庆市作物种质永川茶树资源圃项目(ZWZZ2020007)。

摘　　要：【目的】探究低温条件下茶树在不同红光与远红光比值(red to far-red light ratio,R/FR)光环境中的生理与分子响应,为工厂化光设施育苗冬季补光提供理论指导。【方法】以茶树品种‘谷雨春’为材料,设置远红光处理(FR,R/FR=4.1)和白光处理(CK,R/FR=10.4),研究低温条件(10℃)下不同R/FR比值光环境对茶树气体交换参数、荧光参数及光敏色素互作因子(phytochrome interacting factors,PIFs)表达量的影响。【结果】低温条件下添加远红光、降低R/FR比值会导致茶树叶片蒸腾速率(T_(r))、净光合速率(P_(n))与电子传递速率(electron transport rate,ETR)下降,非调节性能量耗散的量子产量Y(NO)所占的比例升高,实际量子产量(YⅡ)和调节性能量耗散的量子产量Y(NPQ)所占的比例下降,叶绿素合成的重要调节因子CsPIF3a基因下调表达。【结论】低温条件下低比值的R/FR光环境削弱了茶树叶片的光合电子传递能力,抑制叶绿素合成相关基因的表达,降低光合能力,叶片受到光损伤。【Objective】The physiological and molecular responses of tea plants under different red/far-red light ratio(R/FR)light environments under low-temperature conditions were explored to provide theoretical guidance for winter light supplementation in factory light facilities.【Method】‘Guyuchun’was used as the material,and far red light treatment(FR,R/FR=4.1)and white light treatment(CK,R/FR=10.4)were set up to study the effects of different R/FR ratio light environments on gas exchange parameters,fluorescence parameters,and the expression of phytochrome interaction factors(PIFs)of tea plants under low-temperature conditions(10℃).【Result】The transpiration rate(T_(r)),net photosynthetic rate(P_(n)),and electron transport rate(ETR)of tea leaves decreased.The proportion of non-regulated energy dissipation quantum yield Y(NO)increased,the proportion of actual quantum yield(YⅡ)and regulated energy dissipation quantum yield Y(NPQ)decreased,and the important regulator of chlorophyll synthesis CsPIF3a gene was down-regulated.【Conclusion】The low ratio of R/FR light environment under low-temperature conditions weakens the photosynthetic electron transport capacity of tea leaves,inhibited the expression of chlorophyll synthesis related genes,reduces the photosynthetic capacity,and leaves are subjected to light damage.

关 键 词：茶树 红光与远红光比值 光合荧光特性 光敏色素互作因子 

分 类 号：S571.1[农业科学—茶叶生产加工]