新疆农业科学2025，Vol.62Issue(12)：2893-2907,15.DOI:10.6048/j.issn.1001-4330.0000.00.000
5个早实核桃品种枝条的低温生理响应与抗寒性评价
Evaluation of cold resistance and physiological responses to low temperature in branches of five early-fruiting walnut varieties
摘要
Abstract
[Objective]In order to evaluate the cold resistance of five early fruiting walnut varieties in Xinjiang,the annual walnut shoots of'Xinxin 2','Wen 81','Wen 185','Zha343'and'Xinzaofeng'were used as experimental materials to determine the effects of different low temperature treatments on their physiological indexes,so as to provide a reference for the study of cold resistance of walnut.[Methods]Using artificial simulation of natural cooling,5 varieties of dormant branches were subjected to low temperature(-10,-15,-20,-25,-30℃)stress treatment.Eleven physiological indexes,such as electrical conductivity,relative electrical conductivity,soluble sugar content,malondialdehyde content,water content,germination rate,catalase activity,peroxidase activity and proline content,were measured during the treatment.[Results]With the decrease of treatment temperature and the increase of treatment time,the conductivity,relative conductivity,soluble sugar content,and malondialdehyde content showed a gradually increasing trend,while the water content and germination rate showed a gradually decreasing trend.Catalase activity,peroxidase activity,and proline content showed an increasing trend followed by a decreasing trend,while superoxide dismutase activity and soluble protein content showed an S-shaped curve change trend.[Conclusion]'Wen 185'had the best cold resistance,while'Wen 81'had the worst cold resistance,and the low temperature tolerance ranking was:'Wen 185'>'Zha 343'>'Xin Xin 2'>'Xin Zhaofeng'>'Wen 81'.These findings are helpful to further understand the physiological mechanism of walnut coping with low temperature stress,and can provide theoretical support for the breeding of cold resistance in Xinjiang early-bearing walnut.关键词
核桃/低温胁迫/生理指标/抗寒性评价Key words
walnut/low temperature stress/physiological indicators/cold resistance evaluation分类
农业科技引用本文复制引用
吴嘉龙,欧源,张锐,虎海防,王俊武..5个早实核桃品种枝条的低温生理响应与抗寒性评价[J].新疆农业科学,2025,62(12):2893-2907,15.基金项目
2022年度南疆重点产业创新发展支撑计划项目(2022DB022) （2022DB022）
2023年自治区重点研发计划(2023B02026) 2022 Southern Xinjiang key industry innovation and development support plan project(2022DB022) （2023B02026）
2023 Autonomous region key research and development plan(2023B02026) （2023B02026）
