河南农业科学2017，Vol.46Issue(1)：122-126,5.DOI:10.15933/j.cnki.1004-3268.2017.01.022
干旱胁迫下文冠果光合指标的变化研究
Photosynthetic Indexes Variation of Xanthoceras sorbifolia under Drought Stress
摘要
Abstract
The aim of this research is to determine the threshold of irrigation so that it can make sure of the normal growth of Xanthoceras sorbifolia at the same time of saving water by exploring photosynthetic physiology changes of X.sorbifolia under drought stress.In this study,through pot experiment,the photosynthetic indexes and fluorescence parameters of X.sorbifolia were determined by using Li-6400 under 5 water densities.The soil water content was controlled respectively at 80％ (T1),60％ (T2),40％ (T3),20％(T4) of the maximum water holding capacity,with normal irrigation as CK.The result showed that the parameters(Pn,Tr,Gs,qP) decreased with the increase of drought stress time and drought gradient,which caused the photosynthesis restrained.The fluorescence parameters (Fv/Fo,Fv/Fm and WUE) decreased with the aggravation of water stress and they showed T2 ＞ T3 ＞ T4.However,the photosynthetic parameters (Pn,Gs,Ci) of T1 decreased because of adequate irrigation.The seedling photosynthetic indexes of X.sorbifolia showed CK ＞ T2 ＞ T1 ＞ T3 ＞ T4 by PCA (principle component analysis) under different water condition.Results indicate that WUE is the highest and all the photosynthetic indexes perform better when field water content is 60％.关键词
文冠果/干旱胁迫/光合作用/叶绿素荧光参数/主成分分析Key words
Xanthoceras sorbifolia/drought stress/photosynthesis/chlorophyll fluorescence parameters/PCA分类
农业科技引用本文复制引用
马新,李铭,朱耀军,董鹏,姜继元..干旱胁迫下文冠果光合指标的变化研究[J].河南农业科学,2017,46(1):122-126,5.基金项目
国家林业公益性行业科研专项(201404712) （201404712）
兵团科技攻关项目(2015AD024,2015AD019) （2015AD024,2015AD019）
