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<p>Abiotic stress significantly affects the quality of crops and vegetables. This study systematically evaluated the agronomic traits, nutritional quality, and odor components of vegetable soybeans grown in saline-alkali and normal soil. Results showed that, compared with normal conditions, the basic traits like standard pod number and pod phenotype of vegetable soybeans grown under saline-alkali stress remained unchanged, while pod weight per plant and 100-grain weight decreased significantly. The activities of antioxidant enzymes increased in all varieties under stress. In terms of nutritional quality, the protein, total isoflavones, Fe and Zn contents increased significantly in all varieties, with increase ranges of 2.3%–10.29%, 3.97%–21.15%, 8.59%–69.15%, and 19.57%–54.82%, respectively. The changes in Ca and Mg content varied depending on the variety, while the content of oil and soluble sugar decreased by 5.06%–14.21% and 1.26%–35.95%, respectively; The odor has been improved, and the response values of aldehydes and alcohols related to beany flavor decreased by 11.66%–27.16%. Partial correlation analysis revealed that under saline-alkali stress, there was a&#xa0;positive correlation between oil and soluble sugars, while the correlation between soluble sugars and free amino acids changed from a&#xa0;positive correlation under normal conditions to a&#xa0;negative correlation, reflecting carbon source competition and the transformation of osmoregulatory substance. This research provides ideas for breeding salt-tolerant vegetable soybean varieties with high functional components, and offers theoretical support for the efficient utilization of marginal saline-alkali land.</p>

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A Comprehensive Evaluation of the Quality Improvement of Vegetable Soybean Under Saline-alkali Stress

  • 期刊论文

  • 发表日期：

    2026年2月20日

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  • Sijie Xiong,
  • Jie Dai,
  • Dan Zhu,
  • Haiyu Jia,
  • Ping Zhao,
  • Chenggang Han,
  • Longgang Zhao

摘要

Abiotic stress significantly affects the quality of crops and vegetables. This study systematically evaluated the agronomic traits, nutritional quality, and odor components of vegetable soybeans grown in saline-alkali and normal soil. Results showed that, compared with normal conditions, the basic traits like standard pod number and pod phenotype of vegetable soybeans grown under saline-alkali stress remained unchanged, while pod weight per plant and 100-grain weight decreased significantly. The activities of antioxidant enzymes increased in all varieties under stress. In terms of nutritional quality, the protein, total isoflavones, Fe and Zn contents increased significantly in all varieties, with increase ranges of 2.3%–10.29%, 3.97%–21.15%, 8.59%–69.15%, and 19.57%–54.82%, respectively. The changes in Ca and Mg content varied depending on the variety, while the content of oil and soluble sugar decreased by 5.06%–14.21% and 1.26%–35.95%, respectively; The odor has been improved, and the response values of aldehydes and alcohols related to beany flavor decreased by 11.66%–27.16%. Partial correlation analysis revealed that under saline-alkali stress, there was a positive correlation between oil and soluble sugars, while the correlation between soluble sugars and free amino acids changed from a positive correlation under normal conditions to a negative correlation, reflecting carbon source competition and the transformation of osmoregulatory substance. This research provides ideas for breeding salt-tolerant vegetable soybean varieties with high functional components, and offers theoretical support for the efficient utilization of marginal saline-alkali land.