新疆农业科学2023，Vol.60Issue(11)：2653-2660,8.DOI:10.6048/j.issn.1001-4330.2023.11.007
PEG模拟干旱胁迫下辽棉系列品种种子萌发期抗旱性评价
Drought resistance evaluation of liaomian cotton varieties at germination stage under PEG simulated drought stress
摘要
Abstract
[Objective]To study the drought resistance at seed germination stage of six Liaomian cotton varieties under PEG simulated drought stress.[Methods]The seeds of six Liaomian varieties were used as the testing materials to study drought resistance at seed germination stage under different concentrations of PEG-6000(0,2.5％,5.0％,7.5％and 10.0％).Germination energy,germination rate,germination index,germination drought resistance index,hypocotyl length,root length,seedling fresh weight and root fresh weight were measured under different drought stress.[Results]The germination of cotton seeds was inhibited to dif-ferent degrees,and the germination energy,germination rate and germination drought resistance index were decreased with the increase of PEG concentrations.Seedling growth index and root growth index were signifi-cantly inhibited under 2.5％PEG stress.5.0％PEG stress promoted root length growth of all materials.The inhibition degrees of each index under PEG stress above 5.0％concentration were gradually increased with the increase of stress.[Conclusion]The six Liaomian cotton varieties were sorted according to their drought resist-ance as follows:Liaomian 10＞Liaomian 23＞Liaomian 45＞Liaomian 53＞Liaomian 49＞Liaomian 34.关键词
棉花/PEG胁迫/萌发期/抗旱性Key words
cotton/PEG stress/germination stage/drought resistance分类
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单莹,李越,徐敏,刘艳珍,李冉,陈捷胤,王子胜,朱鹤..PEG模拟干旱胁迫下辽棉系列品种种子萌发期抗旱性评价[J].新疆农业科学,2023,60(11):2653-2660,8.基金项目
国家现代农业产业技术体系棉花产业技术体系辽河综合试验站(CARS-15-31) （CARS-15-31）
棉花生物学国家重点实验室开放课题基金(CB2022A25)Liaohe Cotton Experiment Station,CARS(CARS-15-31) （CB2022A25）
State Key Laboratory of Cotton Biology Open Fund(CB2022A25) （CB2022A25）
