新疆农业科学2017，Vol.54Issue(10)：1804-1812,9.DOI:10.6048/j.issn.1001-4330.2017.10.005
低温胁迫下美国核桃和中国新疆核桃抗寒性综合评价
Comprehensive Evaluation of Cold Resistance of American Walnut and China Xinjiang Walnut under Low Temperature Stress
摘要
Abstract
[Objective] To identify and evaluate the cold resistance of American walnut and Xinjiang walnut cultivars and to provide scientific reference for the introduction and cultivation of walnut varieties.[Method]The one year-old dormant shoots of 5 American walnut cultivars and 3 main walnut cultivars in Xinjiang were used as experimental materials,and they were treated under different cold stress conditions (-12℃,-16℃,-20℃,-24℃,-28℃,-32℃ and-36 ℃) with the treatment under 4℃ as the control.The relative electric conductivity,soluble sugar content,soluble protein content,free proline content and malondialdehyde (MDA) content of the tested varieties under different low temperature stress were measured.What was more,the correlation and principal component analysis were used to evaluate the cold resistance of walnut varieties by means of subordinate function.[Result]The results showed that with the decrease of temperature,the relative conductivity,soluble sugar,soluble protein,free proline and MDA contents of annual branches increased gradually.There was a significant difference between the rising range of each index and the peak temperature and different varieties had different cold hardiness.[Conclusion] Comprehensive evaluation showed that the cold resistance order of 8 walnut varieties was Xinwen 185 ＞ Wina ＞ Xinfeng ＞ Xinxin 2 ＞ Emig ＞Chandler ＞ Hartley ＞ Pedro.Except for Wiener,the cold resistance of American walnut varieties is lower than that of Xinjiang walnut cultivars.Hartley'and Pedro'are not suitable for cultivation in Xinjiang.关键词
核桃/抗寒性/生理指标/综合评价Key words
walnut/cold resistance/physiological index/comprehensive evaluation分类
农业科技引用本文复制引用
韩立群,马凯,李亚利,赵国庆,樊丁宇,梅闯,王继勋..低温胁迫下美国核桃和中国新疆核桃抗寒性综合评价[J].新疆农业科学,2017,54(10):1804-1812,9.基金项目
新疆自治区公益性科研院所基本科研业务经费资助项目(KY2015073)The Basic Research Funding for the Public Welfare Research Institutes of Xinjiang Uygur Autonomous Region(KY2015073) （KY2015073）
