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<p>Capsicum, a long-duration crop typically cultivated under protected conditions, is highly susceptible to biotic and abiotic factors that can severely compromise its yield, quality, and market value. Cucumber mosaic virus (CMV) represents a significant phytopathological constraint in capsicum production. This study investigated the efficacy of foliar-applied salicylic acid (SA) in mitigating CMV infections and thereby improving the crop’s health and productivity. Pre-treatment with 100 ppm salicylic acid, applied 24&#xa0;h before viral inoculation, demonstrated the greatest efficacy in lowering the disease’s incidence and severity. This treatment not only delayed the development of virus symptoms but also reduced ELISA-detected CMV accumulation while promoting plant growth and increasing yield. Salicylic acid treatment significantly increased endogenous SA levels and was associated with defense-related responses linked to systemic acquired resistance (SAR). This activation corresponded with increased transcription of SAR-associated genes, including those encoding pathogenesis-related proteins and defense enzymes. Furthermore, SA alleviated virus-induced oxidative damage by enhancing the plant’s antioxidant defenses and stimulated the jasmonic acid (JA)-mediated signaling pathway. The increased accumulation of key biochemical constituents signified improved overall plant health and vigour, which subsequently promoted robust growth and contributed to higher yields. The results suggest that using salicylic acid as a treatment could be a promising and sustainable method for managing CMV in capsicum.</p>

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Salicylic acid-mediated induced resistance in capsicum against cucumber mosaic virus infection

  • 期刊论文

  • 发表日期：

    2026年6月27日

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  • Suveditha Subhash,
  • Kodthalu Seetharamaiah Shivashankar,
  • Krishna Reddy

摘要

Capsicum, a long-duration crop typically cultivated under protected conditions, is highly susceptible to biotic and abiotic factors that can severely compromise its yield, quality, and market value. Cucumber mosaic virus (CMV) represents a significant phytopathological constraint in capsicum production. This study investigated the efficacy of foliar-applied salicylic acid (SA) in mitigating CMV infections and thereby improving the crop’s health and productivity. Pre-treatment with 100 ppm salicylic acid, applied 24 h before viral inoculation, demonstrated the greatest efficacy in lowering the disease’s incidence and severity. This treatment not only delayed the development of virus symptoms but also reduced ELISA-detected CMV accumulation while promoting plant growth and increasing yield. Salicylic acid treatment significantly increased endogenous SA levels and was associated with defense-related responses linked to systemic acquired resistance (SAR). This activation corresponded with increased transcription of SAR-associated genes, including those encoding pathogenesis-related proteins and defense enzymes. Furthermore, SA alleviated virus-induced oxidative damage by enhancing the plant’s antioxidant defenses and stimulated the jasmonic acid (JA)-mediated signaling pathway. The increased accumulation of key biochemical constituents signified improved overall plant health and vigour, which subsequently promoted robust growth and contributed to higher yields. The results suggest that using salicylic acid as a treatment could be a promising and sustainable method for managing CMV in capsicum.