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To investigate the effects of salt stress on seedling growth of the high oleic acid peanuts,seven cultivars were selected as experimental materials.Utilizing an indoor hydroponic cultivation method,salt stress(200 mmol/L NaCl)was applied during the seedling stage,and the changes of the dry matter accumulation,root morphology,and leaf physiological characteristics of the different high oleic acid peanut cultivars under salt stress treatment were examined in this study.The results demonstrated that the salt stress significantly reduced the peanut root length,root surface area,root volume,number of root tips,root activity,shoot dry mass, root dry mass,and total dry mass,while increasing the rootshoot ratio.Under salt stress,high oleic acid peanut cultivars generally exhibited lower salt tolerance indices and relative values for root morphological traits compared to conventional peanut cultivars.The salt tolerance index of the large-kernel type high oleic acid cultivars ranged from 0.78 to 0.88,and about the small-kernel type high oleic acid cultivars,it ranged from 0.70 to 0.86.The large-kernel type high oleic acid cultivars showed lower relative values for superoxide dismutase(SOD) activity but higher relative values for peroxidase(POD) and catalase(CAT) activities compared to conventional large-kernel type peanuts.The small-kernel type high oleic acid cultivars generally exhibited lower relative values for the leaf antioxidant enzyme activities than the conventional small-kernel type peanuts.The relative malondialdehyde(MDA) content in leaves was generally higher for both large-and small-kernel types of high oleic acid cultivar groups compared to their respective conventional peanut groups.Among the high oleic acid cultivars evaluated,Jihua19,Shanhua21,Kainong308,and Jihual8 demonstrated relatively strong adaptability under salt stress and can be recommended as preferred varieties for cultivation in medium and mild saline-alkali soils.
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Basic Information:
DOI：10.14001/j.issn.1002-4093.2026.03.005
China Classification Code:S565.2
Citation Information:
[1]LIU Ruiqi,SU Wanyu,LUO Lu ,et al.Effects of Salt Stress on Root Morphology and Physiological Characteristics of High Oleic Acid Peanut Seedlings[J].Journal of Peanut Science().DOI:10.14001/j.issn.1002-4093.2026.03.005.
Fund Information:
山东省重点研发计划（重大科技创新工程）项目（2024CXGC010902）; 国家现代农业产业技术体系（CARS-13）
2026-05-11
2026-05-11
2026-05-11