不同种源江南油杉幼苗对干旱胁迫的生理响应  

Physiological response from different provenances of Keteleeria fortunei seedlings to drought stress

作　　者：刘菲[1,2] 周隆腾 蒋燚[1,2] 宋倩[4] 戴菱 刘雄盛[1,2] 李娟[1,2] 姜英[1,2] 韦铄星[1,2] LIU Fei;ZHOU Longteng;JIANG Yi;SONG Qian;DAI Ling;LIU Xiongsheng;LI Juan;JIANG Ying;WEI Shuoxing(Guangxi Key Laboratory of Superior Timber Trees Resource Cultivation,Guangxi Zhuang Autonomous Region Forestry Research Institute,Nanning 530002,Guangxi,China;Key Laboratory of Central South Fast-growing Timber Cultivation of Forestry Ministry of China,Guangxi Zhuang Autonomous Region Forestry Research Institute,Nanning 530002,Guangxi,China;;Department of Forestry of Guangxi Zhuang Autonomous Region,Nanning 530028,Guangxi,China;Flower Research Institute of Guangxi Academy of Agricultural Sciences,Nanning 530007,Guangxi,China)

机构地区：[1]广西壮族自治区林业科学研究院广西优良用材林资源培育重点实验室,广西南宁530002 [2]广西壮族自治区林业科学研究院国家林业局中南速生材繁育实验室,广西南宁530002 [3]广西壮族自治区林业厅,广西南宁530028 [4]广西农业科学院花卉研究所,广西南宁530007

出　　处：《中南林业科技大学学报》2018年第11期35-45,共11页Journal of Central South University of Forestry & Technology

基　　金：广西重点研发计划(桂科AB16380100);广西林业科技项目(桂林科字[2014]第5号);广西林科院基本科研业务费(林科201621号);广西优良用材林资源培育重点实验室自主课题(16-A-01-01);广西第十六批"新世纪十百千人才工程"第二层次人选专项资金(桂人社函[2015]130号);桂林科研[2015]第36号

摘　　要：以桂北(GB)、桂西北(GXB)、桂中南(GZN)、桂东北(GDB)、福建(FJ)、贵州(GZ)、云南(YN)共7个地理种源的江南油杉1年生幼苗为研究材料,研究PEG-6000模拟干旱环境下江南油杉幼苗的抗旱生理响应特征。结果表明:随着干旱胁迫程度的加深,江南油杉各种源株高和地径生长量整体呈现下降的趋势,但每个处理中种源间的株高和地径生长量的差异不显著,不同处理对每个种源内的株高和地径生长量的差异不显著;GB、GZN、GZ、YN种源江南油杉幼苗SOD活性逐渐增加,GXB、GDB、FJ种源SOD活性先增加后下降;POD整体呈现先下降后上升的趋势;叶绿素总量整体逐渐下降;MDA含量先小幅下降后逐渐增加,电导率呈现逐步上升的趋势;脯氨酸含量逐渐增加,可溶性总糖含量整体呈现先下降再上升的趋势;叶片相对含水量逐渐减小。隶属函数分析表明7个江南油杉种源抗旱性强弱关系为:FJ> GZ> GB> YN> GDB> GZN> GXB。In this paper,the 1 years old seedings from 7 provenances,north of Guangxi autonomous region(GB),north west of Guangxi(GXB),central south of Guangxi(GZN),north east of Guangxi(GDB),Fujian province(FJ),Guizhou province(GZ)and Yunnan province(YN)of Keteleeria fortunei var.cyclolepis,as research materials,were used to investigate their physiological response characteristics of drought resistance of simulated the drought environment by PEG-6000.The results showed that:with aggravation of drought stress,the increment of height and ground diameter showed an overall decreasing trend of every provenance of Keteleeria fortune,but the height and ground diameter between provenances of each treatment have no obvious difference,it has no obvious difference in the height and the ground diameter within provenances of different treatment;the Keteleeria fortune seedings from provenances GB,GZN,GZ and YN,their SOD activity increased gradually,the seedings from provenances GXB,GDB and FJ,their SOD activity firstly increased then decreased;the POD activity showed an overall trend that decreased firstly then increased;the total chlorophyll were gradually decreased in whole;the MDA has decreased firstly in a small amplitude then gradually increased,the electrical conductivity showed an increasing trend gradually;the pro increased gradually,the soluble sugar content showed an overall trend decreased firstly then increased;the leaf relative water content decreased gradually.The result of subordinate function analysis showed that:the relationships of the drought-resistant ability from 7 provenances of Keteleeria fortune seedings were FJ>GZ>GB>YN>GDB>GZN>GXB.

关 键 词：干旱胁迫 江南油杉 抗旱性 种源 隶属函数 

分 类 号：S791.15[农业科学—林木遗传育种]