ZHAO Xuhong1
LI Xueying2
XU Jing1
YIN Xiangzhen1
GAO Beibei3
JIANG Xiao1
SUN Shu-juan3
CHEN Na1
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Huayu33, a high-yielding, high-quality, and disease-resistant peanut variety developed by Shandong Peanut Research Institute, exhibits rapid seedling emergence, uniform seedling growth, well-developed root system, and strong stress resistance. In order to analyze the mechanism of peanut stress resistance through the aspect of physiological characteristics, the stress-tolerant variety Huayu33, the salt sensitive variety Huayu9115, and the cold sensitive line P17-128 were taken as experimental materials in this study, and the effects of salt and cold stresses on the physiological characteristics of peanut seedlings were evaluated by physiological index measurement and comprehensive evaluation. The results showed that the relative activity of superoxide dismutase(SOD) and peroxidase(POD), the relative content of chlorophyll(Chl), soluble sugar(Ss) and proline(PRO) in Huayu33 were higher than those in the sensitive variety(line) with the increase of stress time, while the relative content of malondialdehyde(MDA) in the sensitive variety(line) was slightly higher than that in Huayu33. These results indicated that Huayu33 had stronger antioxidant capacity, osmotic regulation ability, and membrane stability. Under salt stress, the relative activity of SOD and POD, and the relative content of Chl and PRO in Huayu33 increased significantly, indicating that the salt tolerance is mainly enhanced by synthesizing more antioxidant enzymes, chlorophyll, and proline. When subjected to cold stress for 48 hours, the relative activities of SOD and POD, and the relative content of PRO in Huayu33 increased, while the relative content of MDA decreased. This suggests that the plant mitigates oxidative damage by accumulating antioxidant enzymes and osmotic regulatory substances to eliminate reactive oxygen species, thereby improves its cold tolerance. The comprehensive evaluation analysis showed that the peanut seedling physiological response was the strongest and the comprehensive score was the highest after 48 h of stress. The comprehensive score of Huayu33 was always higher than that of the sensitive variety(line), and its tolerance was more stable. The physiological mechanism of salt and cold tolerance in Huayu33 was preliminarily studied, which provided the theoretical basis and germplasm resources for the analysis of salt and cold tolerance and the breeding of peanut germplasms with high tolerance.
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Basic Information:
DOI：10.14001/j.issn.1002-4093.2026.02.006
China Classification Code:S565.2
Citation Information:
[1]ZHANG Qi,CHI Xiaoyuan,ZHAO Xuhong ,et al.Analysis of Physiological Mechanism of Salt and Cold Tolerance in Seedling Stage of Huayu33[J].Journal of Peanut Science,2026,55(02):197-206.DOI:10.14001/j.issn.1002-4093.2026.02.006.
Fund Information:
山东省重点研发计划(竞争性创新平台)项目(2025CXPT167);山东省重点研发计划项目(2024LZGC035); 泰山学者工程项目(NO.tstp20240523,NO.tsqn202312292); 财政部和农业农村部国家现代农业产业技术体系专项(CARS-13); 山东省自然科学基金项目(ZR2023QC146,ZR2023QC177); 新疆维吾尔自治区重大科技专项(2022A02008-3); 农业农村部油料作物生物学与遗传育种重点实验室(KF2024007); 山东省农业科学院农业科技创新工程项目(CXGC2026A03,CXGC2025F19,CXGC2025C19);山东省农业科学院齐鲁农科英才工程(创新类); 东营市科技创新重大专项科技发展指导计划(2024ZDJH100)
2026-04-14
2026-04-14
2026-04-14