江西水利电力大学学报2026，Vol.45Issue(4)：46-52,106,8.
高温背景下干旱胁迫对不同种源香樟光合特性的影响
Impact of drought stress on photosynthetic characteristics of different Camphora officinarum provenances under high temperature conditions
摘要
Abstract
Drought events often occur simultaneously with high temperatures,causing serious damage to the growth and de-velopment of plants.Intraspecific variation in the response of different provenances of the same plant species to drought may exist,but studies on such topics are scarce.This study evaluated the effects of drought under high temperature conditions on Camphora officinarum seedlings from four provenances,including Jiaxing(JX),Enshi(ES),Nanchang(NC),and Kunming(KM),exploring the responding patterns of their photosynthetic characteristics(including gas exchange parameters and chlorophyll fluorescence parameters).Results show that,all photosynthetic traits were negatively affected to varying degrees by drought,among which the gas exchange parameters of the KM provenance were most affected,while the other three prove-nances mitigated the negative effects of drought by increasing the stomatal limit value and water use efficiency.Unlike the intraspecific variation shown in the response of gas exchange parameters to drought,the response pattern of chlorophyll fluo-rescence parameters did not differ among provenances.Our results indicate that the KM provenance has a relatively weak a-bility to resist drought stress under a high-temperature background,and the responses of the gas exchange parameters and chlorophyll fluorescence parameters of C.officinarum to drought may be asynchronous.Results from this study will provide insights into selection of C.officinarum varieties with high stress resistance,exploitation of resources and policy making on forest management.The results of this study can provide a scientific basis for the screening of excellent drought-tolerant vari-eties of camphor trees.关键词
干旱胁迫/气体交换参数/叶绿素荧光参数/香樟/种内差异性Key words
drought stress/gas exchange parameters/chlorophyll fluorescence parameters/Camphora officinarum/intraspecif-ic variation分类
农业科技引用本文复制引用
孙秀秀,黄国敏,李鑫,王金平,黄荣珍,樊后保..高温背景下干旱胁迫对不同种源香樟光合特性的影响[J].江西水利电力大学学报,2026,45(4):46-52,106,8.基金项目
国家自然科学基金项目(31901091) （31901091）
江西省自然科学基金项目(20252BAC240630) （20252BAC240630）
江西省2024年度研究生创新专项资金项目(YC2024-S888) （YC2024-S888）
