河南农业大学学报2018，Vol.52Issue(2)：199-205,7.
高温干旱胁迫对白及光合特性及叶绿素荧光参数的影响
Effects of heat and drought stress on the photosynthetic characteristics and chlorophyll fluorescence parameters of Bletillastriata
摘要
Abstract
In order to study the effects of heat and drought stress on the photosynthesisof Bletillastriata,two-year-old Bletilla was used as a basic material.The plants were grew in a growth chamber.Four treatments of heat,drought,combination of high temperature and drought,and control.The changes of photosynthesis and chlorophyll fluorescence characteristics in the leaves were measured after 0 d,7 d,14 d and 21 d treatments.The results showed that high temperature and drought stress inhibited the growth and photosynthesis of Bletilla.Under the three kinds of stress,the photosynthetic parameters of Bletilla,the net photosynthetic rate,stomatal conductance and transpiration rate of the treatments were significantly decreased.Photochemical efficiency (Fv/Fm),maximum quantum yield (Yield),and apparent photosynthetic electron transport rate (ETR) of photosystemⅡ (PSⅡ) were decreased gradually as longer time of treatment,but the initial fluorescence (Fo) and NPQ were increased.The decrease of photosynthetic parameters was much higher than those of chlorophyll fluorescence parameters under stress,which indicated that high temperature (36℃) and longer drought period (21 d) affected the photosynthesis of the leaves of Btetilla,it did not damage the light reaction system did not bring irreversibly.关键词
白及/高温/干旱/净光合速率/叶绿素荧光参数Key words
Bletillastriata/heat/drought/net photosynthetic rate/chlorophyll fluorescence parameters分类
农业科技引用本文复制引用
王莹博,许申平,马杰,崔波..高温干旱胁迫对白及光合特性及叶绿素荧光参数的影响[J].河南农业大学学报,2018,52(2):199-205,7.基金项目
河南省产学研合作项目(172107000003,152107000071) （172107000003,152107000071）
