草业学报2013，Vol.22Issue(3)：177-183,7.DOI:10.11686/cyxb20130323
6-BA预处理对低温弱光胁迫下辣椒幼苗光合特性和内源激素含量的影响
Effects of 6-BA pretreatment on photosynthesis characteristics and endogenous hormone content in pepper seedlings under low temperature and weak light stress
摘要
Abstract
The aim of the experiment was to explore the regulatory role of 6-benzylaminopurine (6-BA))on resistance ability of low temperature and weak light in pepper seedlings (Capsicum annuum).The effects of 0.08 mmol/L 6-BA pretreatment on gas exchange parameters,chlorophyll content,endogenous hormone content in pepper seedlings leaves under low temperature (15℃/5℃) and weak light (100 μmol/m2 · s) stress were investigated.Results showed that the photosynthetic rate (Pn),stomatal conductance (Gs),chlorophyll a (Chl a) content,chlorophyll b (Chl b) content,total chlorophyll (Chl T) content and zeatin riboside(ZR) content of pepper seedling leaves were significantly declined,but intercellular CO2 concentration (Ci),abscisic acid (ABA) content were significantly increased under low temperature and weak light stress.The reduction in photosynthesis rate caused by low temperature and weak light stress was considered to be a result of non-stomatal restriction mainly.6-BA had no changed trend of the above index with treatment time prolonged.Under low temperature and weak light stress,treatment with 6-BA significantly declined Ci,ABA content compared with control,but Pn,Gs,Chl a content,Chl b content,Chl T content and ZR content in previous 6 days of strss period were significantly increased.The results suggested that pretreatment with 0.08 mmol/L 6-BA had obviously role on enhanced pepper seedlings tolerance to low temperature and weak light,especially for pepper cultivar were sensitive to low temperature and weak light stress.关键词
6-BA/辣椒幼苗/低温弱光/气体交换参数/内源激素Key words
6-BA/ pepper seedlings/ low temperature and weak light/ gas exchange parameters/ endogenous hormone分类
农业科技引用本文复制引用
张国斌,杨芳芳,郁继华..6-BA预处理对低温弱光胁迫下辣椒幼苗光合特性和内源激素含量的影响[J].草业学报,2013,22(3):177-183,7.基金项目
公益性行业(农业)科研专项资金(201203001),国家现代农业产业技术体系建设专项资金(CARS-25-C-07),教育部高等学校博士学科点专项科研基金(20116202110002)和甘肃省自然科学基金(1010RJZA186)资助. （农业）
