文献类型： 外文期刊
作者： Huang, Miao 1 ; Wang, Chaonan 1 ; Shang, Leijuan 1 ; Yang, Zhiyi 1 ; Yang, Tiantian 1 ; Wang, Huilin 1 ; Liu, Bin 3 ; Liu, Shi 4 ;
作者机构： 1.Xinjiang Agr Univ, Coll Hort, Urumqi 830052, Peoples R China
2.Xinjiang Agr Univ, Xinjiang Special Melon & Fruit Variety Improvement, Urumqi 830052, Peoples R China
3.Xinjiang Acad Agr Sci, Hami Melon Res Ctr, Urumqi 830091, Peoples R China
4.Northeast Agr Univ, Coll Hort & Landscape Architecture, Harbin 150030, Heilongjiang, Peoples R China
关键词： Melon; Copper tolerance; Fine mapping; Population verification; Defensive enzymes
期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：11.3； 五年影响因子：12.4 ）
ISSN： 0304-3894
年卷期： 2025 年 495 卷
页码：
收录情况： SCI
摘要： Copper is crucial for plant growth and development, but excess copper can damage the leaves of melons.We constructed a genetic population using M625 (copper sensitive) and M972 (copper tolerant) materials for precise localization. Under copper stress, we quantified the levels of reactive oxygen species (ROS), antioxidant enzyme activities, hormone contents, copper accumulation, and conducted a detailed examination of leaf structural characteristics. Bulk segregant analysis sequencing (BSA-seq) revealed that the CmCt gene was located within a 1.2 Mb interval on chromosome 5. The initial localization interval was 166.86 kb, and this interval was shortened to 29.05 kb after the analysis of 1200 F2 individuals. There were a total of 6 genes in the interval, among which only MEL03C031073.2 (CmCt, Cucumis melo Copper tolerance) encodes a nonspecific lipid-transfer protein-like protein with non synonymous mutations. We further investigated and found that the gene is subcellular localized in the endoplasmic reticulum (ER), and its changes in the natural population (copper sensitivity and copper tolerance) are consistent with those of the parents. The results of the relevant physiological and biochemical indices of the parental plants subjected to copper stress (2 g/L) indicated a gradual increase in the levels of ROS, malondialdehyde (MDA), jasmonic acid (JA), and salicylic acid (SA). Concurrently, peroxidase (POD) activity exhibited an increase, while the activities of catalase (CAT) and superoxide dismutase (SOD) initially rose before subsequently declining. Moreover, there are differences in cellular structure between copper tolerant and copper sensitive melons, and copper tolerant materials exhibit stronger antioxidant defense capabilities.
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