低温胁迫下不同光照条件对橡胶树耐寒性及光合特征的影响  

Effects of Different Light Conditions on Cold Tolerance and Photosynthetic Characteristics of Hevea brasiliensis under Low Temperature Stress

作　　者：李文秀 许英权 贺军军[1] 张华林[1] 罗萍[1] 施云凤 LI Wen-xiu;XU Ying-quan;HE Jun-jun(Zhanjiang Experimental Station of Chinese Academy of Tropical Agricultural Sciences/Guangdong Dry Farming Water Saving Agricultural Engineering Technology Center,Zhanjiang,Guangdong 524091)

机构地区：[1]中国热带农业科学院湛江实验站/广东省旱作节水农业工程技术中心,广东湛江524091 [2]云南农业大学热带作物学院,云南思茅665099

出　　处：《安徽农业科学》2023年第4期92-94,共3页Journal of Anhui Agricultural Sciences

基　　金：国家重点研发计划项目“橡胶树抗寒高产品种改良”(2019YFD1001102);中央级公益性科研院所基本科研业务费专项“基于SNP分子标记建立橡胶树抗寒评价体系”(1630102022001);海南省自然科学基金项目“橡胶树抗寒性QTL定位及候选基因筛选”(321QN347);国家天然橡胶产业技术体系湛江综合试验站(CARS-33-GD2)。

摘　　要：[目的]探讨低温胁迫下不同光照对橡胶树品种热研7-33-97和湛试327-13耐寒性和光合特征的影响,为橡胶树抗寒性研究及抗寒选育种提供参考。[方法]对橡胶树品种湛试327-13和热研733-97进行低温胁迫,在不同光照条件下,调查平均回枯率和发芽率,测定叶绿素含量和荧光值,分析不同光照条件下的耐寒性和光合特征差异。[结果]热研7-33-97和湛试327-13的平均回枯率分别在50%~96%和87%~100%;发芽率分别为7%~60%和0~33%;叶绿素含量变化处于40~60。不同光照处理的热研7-33-97和湛试327-13荧光值变化差异较小,两者差异不显著。[结论]光照强度差异会影响橡胶树的耐寒性,相比于湛试327-13,光照条件对热研7-33-97的耐寒性影响更大;随着光照强度的提高,两者的叶绿素含量都会降低,但光照强度变化对叶绿素含量和荧光值的影响不大。[Objective]To explore the effects of different light on cold tolerance and photosynthetic characteristics of Hevea brasiliensis varieties CATAS 7-33-97 and Zhanshi 327-13 under low temperature stress,so as to provide reference for cold resistance research and cold resistant breeding of Hevea brasiliensis.[Method]The Hevea brasiliensis varieties Zhanshi 327-13 and CATAS 7-33-97 were subjected to low temperature stress.Under different light conditions,the average withering rate and germination rate were investigated,the chlorophyll content and fluorescence value were measured,and the differences of cold tolerance and photosynthetic characteristics under different light conditions were analyzed.[Result]The average return to dryness rates of CATAS 7-33-97 and Zhanshi 327-13 were 50%-96%and 87%-100%respectively;the germination rate was 7%-60%and 0%-33%respectively;the changes of chlorophyll content are between 40 and 60.There was little difference between the fluorescence values of thermal research 7-33-97 and Zhanshi 327-13 under different light treatments,and the difference analysis between them did not reach a significant level.[Conclusion]The difference of light intensity will affect the cold tolerance of Hevea brasiliensis.Compared with Zhanshi 327-13,the light conditions have a greater impact on the cold tolerance of CATAS 7-33-97;with the increase of light intensity,the chlorophyll content of both will decrease,but the change of light intensity has little effect on the chlorophyll content and fluorescence value.

关 键 词：橡胶树 光照 光合特征 耐寒性 

分 类 号：S718[农业科学—林学]