红锥叶片功能性状对地理环境因子的响应  

Response of functional traits of Castanopsis hystrix leaves to geographical environment factors

作　　者：厉启国 蒋维昕[1] 谭长强[2] 白天道[1] 申文辉[2] LI Qiguo;JIANG Weixin;TAN Zhangqiang;BAI Tiandao;SHEN Wenhui(Key Laboratory of National Forestry and Grassland Administration on Cultivation of Fast-Growing Timber in Central South China,Guangxi Key Laboratory of Forest Ecology and Conservation,College of Forestry,Guangxi University,Nanning 530004,China;Guangxi Academy of Forestry Sciences/Guangxi Center for Improved Castanopsis hystrix Breeding,Nanning 530002,China)

机构地区：[1]广西大学林学院,中南速生材繁育国家林业和草原局重点实验室,广西森林生态与保育重点实验室,南宁530004 [2]广西壮族自治区林业科学研究院/广西红锥良种培育中心,南宁530002

出　　处：《广西植物》2025年第4期773-786,共14页Guihaia

基　　金：中央引导地方科技发展资金项目(桂科ZY21195049)。

摘　　要：叶片是植物进行生理生化活动的重要营养器官,其功能性状可在一定程度上反映植物的环境适应性。为揭示红锥叶片功能性状与地理环境因子的关系,了解其对环境变化的适应性响应,该研究以广西区内6个红锥种群为研究对象,采用巢氏方差分析、主成分分析、聚类分析等方法,解析红锥种群叶片功能性状变异及其与地理环境因子的相关性,探讨红锥叶片功能性状的地理环境变异模式。结果表明:(1)红锥的13个叶片功能性状在种群间和种群内都存在极显著性差异(P<0.001),多样性较高。(2)叶片功能性状以种群内变异为主(平均性状分化系数V st=22.28%),形态性状种群间分化(13.11%~46.93%)高于生理生化性状(10.95%~22.59%),表明叶片的形态性状对环境的响应更显著。(3)叶片功能性状整体上与海拔、经纬度呈正相关,与年降水量呈负相关,表明红锥叶片功能性状受到海拔、地理距离、降水的共同作用。(4)聚类分析将参试红锥种群分为2个类群,Mantel检验结果显示,叶片功能性状与地理距离(P=0.028)和海拔(P=0.013)均呈显著正相关,并且海拔对叶片功能性状的影响相对较为显著。综上所述,红锥叶片功能性状变异丰富,其变异主要来源于种群内,并呈现以海拔、经纬度、降水变化为主的地理变异模式。该研究结果为红锥种质资源的保护和优质种源的筛选利用提供了理论依据。Leaf is an important nutrient organ for physiological and biochemical activities of plants,and its functional traits can reflect the environmental adaptability of plants to a certain extent.In order to reveal the relationship between the functional traits of Castanopsis hystrix leaves and geographical environment factors,and to understand its adaptive response to environmental changes,in this study,six populations of C.hystrix in Guangxi were used as the research objects.Various statistical methods including nested analysis of variance,principal component analysis,and cluster analysis were employed to analyze the variation of leaf functional traits and their correlations with geographical environment factors,to explore the pattern of geographical and environmental variation in the leaf functional traits of C.hystrix.The results were as follows:(1)The 13 leaf functional traits of C.hystrix showed highly significant differences among and within populations(P<0.001),with high diversity.(2)The leaf functional traits were dominated by within population variation[average trait differentiation coefficient(V st)=22.28%],and the differentiation between populations of morphological traits(13.11%-46.93%)was higher than that of physiological and biochemical traits(10.95%-22.59%),indicating that the morphological traits of leaves responded more significantly to the environment.(3)The leaf functional traits were positively correlated with altitude,latitude and longitude,but negatively correlated with annual precipitation,indicating that the leaf functional traits of C.hystrix were affected by altitude,geographic distance and precipitation.(4)Cluster analysis divided the participating C.hystrix populations into two groups,and Mantel test showed that leaf functional traits were significqantly positively correlated with both geographic distance(P=0.028)and altitude(P=0.013),and the effects of altitude on leaf functional traits were relatively more significant.In summary,the functional traits of C.hystrix leaves are rich in variat

关 键 词：红锥 功能性状 地理环境因子 变异模式 关联分析 

分 类 号：Q948[生物学—植物学]