江西农业学报2025，Vol.37Issue(2)：36-43,8.DOI:10.19386/j.cnki.jxnyxb.2025.02.006
22份金线莲种质资源的耐热性评价与分析
Evaluation and Analysis of Heat Resistance of 22 Anoectochilus roxburghii Germplasm Resources
摘要
Abstract
The greenhouse seedlings of Anoectochilus roxburghii from 22 different provenances were used as experimental materials.Under the conditions of high temperature stress at 38℃and 30℃at night,and recovery at suitable temperature at 25℃and 20℃at night,the heat damage index,relative conductivity,chlorophyll,Pro,MDA,GSH,CAT,POD and APX were observed.The results showed that:(1)With the prolongation of high temperature stress time,the relative conductivity,Pro and MDA contents of Anoectochilus roxburghii continued to increase,while Chlorophyll and GSH contents,CAT,POD and APX enzyme activities decreased significantly,and there were obvious differences among varieties.(2)There was a very significant positive correlation between chlorophyll degradation rate and heat damage index(r=0.893),and there was a significant positive correlation between MDA and heat injury index(r=0.835).Therefore,chlorophyll degradation rate and MDA content could be used as reliable indexes for screening and evaluating heat resistance of Anoectochilus roxburghii.(3)Among 22 Anoectochilus roxburghii varieties,K,H,X,J,S,G,T1 and Jiangkang 1 had stronger heat resistance.关键词
金线莲/耐热性/筛选/评价与分析Key words
Anoectochilus roxburghii/Heat resistance/Screening/Evaluation and analysis分类
农业科技引用本文复制引用
吴梅,孔向军,周小军,方莉,赵俊跃,马巧群,郑祎晨,包根玉..22份金线莲种质资源的耐热性评价与分析[J].江西农业学报,2025,37(2):36-43,8.基金项目
浙江省农业新品种选育重大科技专项(2021C02074-4-3) （2021C02074-4-3）
浙江省金华市科技计划项目(2023-2-005). （2023-2-005）
