结缕草属植物水分利用效率与根系形态特征的关系分析  

Relationship Between Water Use Efficiency and Root Morphological Traits of Zoysia Willd.

作　　者：施建舟 王储 唐睿 胡化广 张振铭 刘建秀[2] SHI Jianzhou;WANG Chu;TANG Rui;HU Huaguang;ZHANG Zhenming;LIU Jianxiu(School of Marine and Bioengineering,Yancheng Teachers University,Yancheng,Jiangsu 224051,China;Jiangsu Institute of Botany,Chinese Academy of Sciences,(Nanjing Botanical Garden),Nanjing,Jiangsu 210014,China)

机构地区：[1]盐城师范学院海洋与生物工程学院,江苏盐城224051 [2]江苏省中国科学院植物研究所(南京中山植物园),江苏南京210014

出　　处：《热带农业科学》2020年第7期22-28,共7页Chinese Journal of Tropical Agriculture

基　　金：江苏省大学生创新创业训练计划项目(No.201910324034Y);江苏省第十四批“六大人才”高峰项目(No.NY-096)。

摘　　要：以9份高水分利用效率代表性种源结缕草为实验材料,测定干旱胁迫下水分利用效率和不同土层的根系形态特征,并用简单相关分析、多元线性回归分析、多元逐步回归分析、主成分分析以及通径分析研究结缕草属植物水分利用效率与其根系形态特征的关系。结果表明,结缕草属植物的水分利用效率与0~10、10~20、>20 cm土层的根长,0~10、10~20、>20 cm土层的根系表面积,10~20、>20 cm土层的根系干重关系密切,此3个根系形态特征可作为结缕草属植物的水分利用效率高低的代表性状。本研究结果为结缕草属植物水分高效利用提供了简单可行的形态标记。Nine accessions of Zoysia Willd with high water use efficiency were treated under drought stress to observe their water use efficiency and root morphological traits in different soil layers under drought stress.Relationship between water use efficiency and root morphological traits were analyzed by using simple correlation analysis,multiple linear regression analysis,stepwise regression analysis,principal component analysis and path analysis.The results showed the water use efficiency of Zoysia Willd was highly related with the root length and root surface area under the soil layers of 0~10 cm,10~20 cm and>20 cm deep as well as the root dry weight under the 10~20 cm and>20 cm soil layers.The root length,root surface area and root dry weight under different soil layers could be used as representative traits to indicate water use efficiency of Zoysia Willd.This study provides simple morphological markers of high water use efficiency of Zoysia Willd.

关 键 词：结缕草 水分利用效率 干旱胁迫 根系形态特征 

分 类 号：S688.4[农业科学—观赏园艺]