北方园艺Issue(15)：56-66,11.DOI:10.11937/bfyy.20254394
甜瓜种质幼苗在高盐胁迫下的生长及生理响应
Growth and Physiological Responses to High Salt Stress in Seedlings of Melon Germplasms
摘要
Abstract
Thirteen melon germplasm resources were used as the test materials to comprehensively evaluate their salt tolerance at the seedling stage by measuring growth and physiological indicators,combined with principal component analysis(PCA)and cluster analysis,in order to provide references for salt-tolerant breeding.The results showed that salt stress significantly inhibited seedling growth,with plant height reduction ranging from 15％to 57％.Malondialdehyde(MDA)content increased,proline(Pro)content accumulated substantially,and chlorophyll content decreased.Salt-tolerant materials maintained higher activities of superoxide dismutase(SOD),peroxidase(POD),and catalase(CAT),and the activities of these three enzymes were significantly negatively correlated with MDA content.PCA extracted three principal components with a cumulative contribution rate of 86.039％.Cluster analysis classified the 13 materials into five salt-tolerance grades,among which No.8('2025-42')and No.12('Mengmi')were highly salt-tolerant,while No.4 and No.11 were highly sensitive.In conclusion,salt tolerance in melon was synergistically regulated by multiple physiological processes,with the coordinated defense capability of the antioxidant enzyme system serving as the core mechanism.关键词
盐胁迫/甜瓜种质资源/综合评价Key words
salt stress/melon germplasm resources/comprehensive evaluation分类
农业科技引用本文复制引用
迟翔丹,王永卓,赵艳菲,张金鹏,金鑫,陈莹..甜瓜种质幼苗在高盐胁迫下的生长及生理响应[J].北方园艺,2026,(15):56-66,11.基金项目
吉林省科学技术技厅项目-吉林省重点实验室(吉林省园艺植物遗传育种与生物技术重点实验室)建设资助项目(YDZJ202502CXJD096) （吉林省园艺植物遗传育种与生物技术重点实验室）
吉林省财政厅资助项目(SC20260016). （SC20260016）
