河南农业科学2017，Vol.46Issue(5)：39-44,6.DOI:10.15933/j.cnki.1004-3268.2017.05.007
PEG胁迫下玉米自交系苗期抗旱性鉴定及评价
Identification and Evaluation of Drought Resistance of Maize Inbred Lines at Seedling Stage under PEG Stress
摘要
Abstract
Seventeen maize inbred lines were treated by PEG stress at seedling stage by hydroponic experiments in artificial climate chamber,and leaf relative water content,fluorescence parameters,the activities of SOD,POD,Pro content and plant dry matter weight were determined between control(normal water culture) and PEG stress treatments,the drought resistance identification and classification of 17 inbred lines were done by membership function and clustering analysis method to select seedling drought resistance germplasms,establish drought resistance evaluation system.The results showed that under PEG stress condition,almost all indexes showed a marked change except the PS Ⅱ maximum photochemical quantum Fv/Fm compared to control,leaf relative water content decreased,SOD and POD activities,Pro content increased,the plant dry weight increased,indicating that maize could respond to PEG drought stress by increasing Pro content,the activities of SOD and POD;at the same time,physiological and biochemical indexes reached a significant level among inbred lines under PEG stress condition.Zheng 7024,Zheng 588,L269 and Ji 853 were classified as middle resistant inbred lines,other inbred lines were classified as weak drought resistant inbred lines type by membership function evaluation of drought resistance and the clustering analysis.关键词
玉米自交系/幼苗期/PEG胁迫/生理特性/抗旱性/隶属函数/聚类分析Key words
maize inbred lines/seedling stage/PEG stress/physiological characteristics/drought resistance/membership function/clustering analysis分类
农业科技引用本文复制引用
鲁晓民,曹丽茹,张新,张前进,魏昕,郭金生,王振华..PEG胁迫下玉米自交系苗期抗旱性鉴定及评价[J].河南农业科学,2017,46(5):39-44,6.基金项目
NSFC-河南省人才培养联合基金项目(U1404317) （U1404317）
国家玉米产业技术体系项目(CARS-02-05) （CARS-02-05）
