江西农业大学学报2018，Vol.40Issue(3)：525-532,8.DOI:10.13836/j.jjau.2018069
干旱胁迫及复水对射干光合作用和叶绿素荧光特性的影响
Effects of Drought Stress and Re?watering on the Characteristics of Photosynthesis and Chlorophyll Fluorescence of Blackberry Lily
摘要
Abstract
In this study, a pot experiment was conducted, in which the relative chlorophyll content ( SPAD) ,photosynthetic parameters and chlorophyll fluorescence parameters of blackberry lily ( Belamcanda chinensis L.)leaf were measured through different treatments,namely,normal irrigation (light stress,moderate stress and severe stress,"CK,LD,MD and SD") to understand their responses to drought stress and re?wate?ring.The results were as follows:(1)Compared with CK,SPAD of LD,MD and SD(15 days after treatment)de?creased by 13.5％,24.8％ and 36.9％ respectively.(2)With the prolongation of drought stress,Pn,Gs,Ci,Tr, Fv/Fm,qP and ETR decreased slowly under LD and decreased rapidly under MD and SD.(3)NPQ significant?ly increased with the degree of drought stress.Compared with CK,NPQ of LD,MD and SD (15 days after treat?ment) increased by 10.8％,17.9％ and 28.9％ respectively.(4)2 days after re?watering,SPAD,photosynthetic parameters and chlorophyll fluorescence parameters all recovered in varying degrees but till lower than those of CK.Consequently,the decrease of photosynthetic rate under drought stress was caused by stomatal limitation. The irreversible damage to cell organelles,could be caused by SD(15 days after drought stress).Ci,NPQ and ETR of LD and MD recovered rapidly,SD,however,failed to recover.关键词
射干/干旱胁迫/复水/光合/叶绿素荧光Key words
blackberry lily( Belamcanda chinensis L.)/drought stress/re⁃watering/photosynthesis/chloro⁃phyll fluorescence分类
农业科技引用本文复制引用
杨肖华,郭圣茂,冯美玲,赖晓莲,商靓婷..干旱胁迫及复水对射干光合作用和叶绿素荧光特性的影响[J].江西农业大学学报,2018,40(3):525-532,8.基金项目
中央财政林业科技推广示范资助项目(JXTG[2016]?08号)、江西省科技支撑计划资助项目(20133BBF60012)和江西省教育厅科技资助项目( GJJ13279) Project supported by The Central Government Forestey Science and Technology Promotion Fund Demonstration Projects(JXTG[2016]?08号),Jiangxi Science and Technology Support Project (20133BBF60012) and Jiangxi Provincial Department of Education Science and Technology Project( GJJ13279) （JXTG[2016]?08号）
