河南农业大学学报2017，Vol.51Issue(1)：87-93,7.
短葶山麦冬块根发育期光合日变化特征对水分胁迫的响应
Study on the response of diurnal variation characteristics of photosynthesis of Liriope muscari (Decne.) Bailey to water stress during the tuber development
摘要
Abstract
Four different levels of water stress,mild water stress (W1,65％ FC),moderate water stress (W2,50％ FC),severe water stress (W3,35％ FC) and the control (CK,80％ FC) were applied to study the effects of water stress on the diurnal change of photosynthetic characteristics of Liriope muscari (Decne.) Bailey at different growth stages.The net photosynthetic rate reached a maximum at 10∶00am under different soil moisture conditions.The diurnal variation of net photosynthetic rate presented a one-peak curve overall.At theso three stages,the maximum peak and average value of photosynthetic rate were expressed as CK ＞ W1 ＞ W2 ＞ W3,and transpiration rate and stomatal con ductance were CK ＞ W1 ＞ W2 ＞ W3.Under different soil moisture conditions,the daily average and peak value of net photosynthetic rate,stomatal conductance and water use efficiency were early stage of tuber-expanding ＞ later stage of tuber-producing ＞ middle stage of tuber-producing,while the daily average value of transpiration rate was manifestedas as middle stage of tuber-producing ＞ later stage of tuber-producing ＞ early stage of tuber-expanding.Comprehensive analysis showed that at different growth stages,water stress decreased the net photosynthetic rate (Pn),transpiration rate (Tr) and stomatal conductance (Gs),while improve water use efficiency (WUE),reasons for the decline of Pn performance at different growth stages were different.Net photosynthetic rate and water use efficiency showed an upward trend after entering the root enlargement stage.关键词
短葶山麦冬/光合日变化/水分胁迫/块根发育Key words
Liriope muscari (Decne.) Bailey/diurnal variation of photosynthesis/water stress/tuber development分类
农业科技引用本文复制引用
范海兰,陈灿,谢安强,林晗,李键,洪伟,吴承祯..短葶山麦冬块根发育期光合日变化特征对水分胁迫的响应[J].河南农业大学学报,2017,51(1):87-93,7.基金项目
福建省自然科学基金项目(2014J05029) （2014J05029）
