西南林业大学学报2025，Vol.45Issue(11)：1-8,8.DOI:10.11929/j.swfu.202410022
2种风铃木相互嫁接后的耐盐性差异机制
Salt Tolerance Differences Mechanisms of Grafting Combinations Between 2 Handroanthus Species
摘要
Abstract
To explore the changes in salt tolerance and the response mechanisms of 2 grafted Handroanthus species,4 types of grafting treatments were conducted using H.impetiginosus and H.chrysanthus,including re-ciprocal grafts and self-grafts(controls).Using 0.5％NaCl solution for salt stress,after 21 days of stress treatment,the salt tolerance of each grafted combination was observed and analyzed,and the changes in cell membrane in-tegrity,content of osmotic adjustment substances,antioxidant enzyme activities,and the balance of sodium and potassium ions under salt stress were observed and analyzed.The results indicated that both forward and reverse grafting unions of 2 Handroanthus species enhanced salt tolerance,with significantly greater salt tolerance in grafted plants using the more salt-tolerant H.impetiginosus as the rootstock.Under salt stress conditions,the physiological and biochemical responses of grafted Handroanthus spp.revealed the important role of rootstock-scion interaction in improving their salt tolerance.The salt-tolerant mechanisms involved maintaining the integ-rity of cell membranes in leaves and roots,reducing the accumulation of malondialdehyde,increasing the content of free proline and the activity of superoxide dismutase,intercepting excess sodium ions in the roots,and promot-ing the upward transport of potassium ions to the leaves,thereby maintaining the ionic homeostasis within the grafted plants.关键词
风铃木/嫁接/砧穗互作/耐盐性Key words
Handroanthus spp./grafted union/rootstock-scion interaction/salt tolerance分类
农业科技引用本文复制引用
Zhang Jie,Chang Fanglin,Ai Di,Meng Jingxiang,Wei Yongcheng,Zhang Yong..2种风铃木相互嫁接后的耐盐性差异机制[J].西南林业大学学报,2025,45(11):1-8,8.基金项目
广州市基础与应用基础研究项目(SL2022A04J00896)资助. （SL2022A04J00896）
