核农学报2012，Vol.26Issue(8)：1197-1203,7.
干旱气候条件下水分胁迫对辣椒叶片生理特性的影响
EFFECTS OF WATER STRESS ON THE PHYSIOLOGICAL CHARACTERISTICS OF PEPPER LEAVES IN ARID CLIMATES
摘要
Abstract
In this paper,a pepper variety of LongJiao NO.2 was employed to investigate effects of treatments of normal water,light and severe water stress on MDA content,protective enzyme activities,chlorophyll fluorescence parameters in pepper leaves,in order to determine the soil moisture for the pepper's normal growth in the arid climate of Gansu province.Results showed that MDA content in pepper leaves under the three different treatments showed an increasing trend,activities of SOD and POD were increased firstly and then decreased.Under severe water stress,MDA content and SOD activities in leaves were higher than the other two treatments with higher early-POD activity and lower late-POD.The Fv/Fm,Fv′/Fm′,ФPSII and qP in leaves under three different treatments increased firstly and then dropped.The above mentioned indexes in leaves were lower after treated by severe water stress.The NPQ data in leaves under all the treatments were opposite to the trends of the qP data,and after treated with lighter water stress,NPQ and qP in leaves showed flat variations.These findings suggested that lighter water stress(60% of soil water content) could meet the pepper's normal growth need in arid region where water resource is deficient.关键词
干旱气候/水分胁迫/辣椒/MDA含量/保护酶活性/叶绿素荧光参数Key words
arid climate/water stress/pepper/MDA content/protective enzyme activities/chlorophyll fluorescence parameters分类
农业科技引用本文复制引用
刘佳,郁继华,徐秉良,颉建明..干旱气候条件下水分胁迫对辣椒叶片生理特性的影响[J].核农学报,2012,26(8):1197-1203,7.基金项目
现代农业产业技术体系专项资金资助项目 （）
Supported by China Agriculture Research （）
公益性行业（农业）科研专项经费资助项目 （）
甘肃省科技厅重大专项计划项目 （）
