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<p>Soil salinity poses a significant constraint on food security and ecological stability. sodium nitroprusside (SNP) has been identified as a key agent in enhancing plant salt tolerance. This study investigates the effects of exogenous SNP application on the salt tolerance of sugar beet by simulating a stress environment using hydroponic methods. The results indicate that salt stress markedly reduced the growth index of sugar beet seedlings while significantly increasing the levels of proline (Pro), electrolyte leakage (EL), and malondialdehyde (MDA) in the roots. Furthermore, exogenous SNP application effectively mitigated the excessive accumulation of reactive oxygen species (ROS) in both the leaves and roots of sugar beet seedlings, concurrently enhancing the activities of several antioxidant enzymes, including superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX). Under salt stress conditions, SNP treatment improved photosynthetic parameters, such as fluorescence metrics including electron transport rate (ETR), photochemical quenching (qP), non-photochemical quenching (qN), and maximum quantum yield of PSII (Fv/Fm), elevated chlorophyll content, and enhanced water uptake in the leaves. This ultimately alleviated some of the detrimental effects of salt stress on the growth of sugar beet seedlings. In conclusion, the intrinsic mechanisms underlying salt tolerance in sugar beet seedlings likely involve the antioxidant defense system and the photosynthetic process. This study establishes a theoretical framework that paves the way for further research on the role of SNP in enhancing salt tolerance in sugar beet.</p>

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Sodium nitroprusside improves photosynthesis and antioxidant properties of sugar beet to alleviate salt stress

  • 期刊论文

  • 发表日期：

    2026年7月27日

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  • Jingjie Chen,
  • Xiaodong Li,
  • Pingan Han,
  • Xiaoran Zheng,
  • Gui Geng,
  • Jiahui Liu,
  • Maoqian Wang,
  • Yao Xu,
  • Yuguang Wang

摘要

Soil salinity poses a significant constraint on food security and ecological stability. sodium nitroprusside (SNP) has been identified as a key agent in enhancing plant salt tolerance. This study investigates the effects of exogenous SNP application on the salt tolerance of sugar beet by simulating a stress environment using hydroponic methods. The results indicate that salt stress markedly reduced the growth index of sugar beet seedlings while significantly increasing the levels of proline (Pro), electrolyte leakage (EL), and malondialdehyde (MDA) in the roots. Furthermore, exogenous SNP application effectively mitigated the excessive accumulation of reactive oxygen species (ROS) in both the leaves and roots of sugar beet seedlings, concurrently enhancing the activities of several antioxidant enzymes, including superoxide dismutase (SOD), peroxidase (POD), catalase (CAT), and ascorbate peroxidase (APX). Under salt stress conditions, SNP treatment improved photosynthetic parameters, such as fluorescence metrics including electron transport rate (ETR), photochemical quenching (qP), non-photochemical quenching (qN), and maximum quantum yield of PSII (Fv/Fm), elevated chlorophyll content, and enhanced water uptake in the leaves. This ultimately alleviated some of the detrimental effects of salt stress on the growth of sugar beet seedlings. In conclusion, the intrinsic mechanisms underlying salt tolerance in sugar beet seedlings likely involve the antioxidant defense system and the photosynthetic process. This study establishes a theoretical framework that paves the way for further research on the role of SNP in enhancing salt tolerance in sugar beet.