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<p>The regulatory functions that jasmonic acid (JA) and salicylic acid (SA) play in physiological processes when plants are subjected to water deficiency is not well understood currently. Therefore, this study was devised to analyze the regulatory role and antagonistic interactions between JA and SA that may ultimately play a role in mitigating drought stress. Experimental <i>Rosa damascena</i> plants were harvested at three different time points after having been subjected to 25%, 50% or 100% of the soil water holding capacity (WHC), utilizing <i>R. damascena</i>. The stomatal aperture was reduced greatly in JA-treated plants cultivated in simulated severe drought stress conditions; however, this reduction in stomata aperture was significantly restored upon exogenous application of SA. Additionally, SA applied to JA-treated, drought-stressed plants modulates proline content in both roots and shoots. Finally, the reduction of the total chlorophyll content was mediated by disruption of the stomata aperture, the augmented levels of antioxidant enzyme activity, and the proline content in JA-treated plants subjected to severe drought stress were all mitigated via the exogenous application of SA, suggesting that SA may modulate JA-induced stomatal closure, even under drought condition.</p>

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Metabolic responses induced by JA and SA in mitigating simulated drought stress in Rosa Damascena

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • Mina Khorami Moghadam,
  • Mostafa Khoshhal Sarmast,
  • Azim Ghasemnejad,
  • Tatyana Savchenko

摘要

The regulatory functions that jasmonic acid (JA) and salicylic acid (SA) play in physiological processes when plants are subjected to water deficiency is not well understood currently. Therefore, this study was devised to analyze the regulatory role and antagonistic interactions between JA and SA that may ultimately play a role in mitigating drought stress. Experimental Rosa damascena plants were harvested at three different time points after having been subjected to 25%, 50% or 100% of the soil water holding capacity (WHC), utilizing R. damascena. The stomatal aperture was reduced greatly in JA-treated plants cultivated in simulated severe drought stress conditions; however, this reduction in stomata aperture was significantly restored upon exogenous application of SA. Additionally, SA applied to JA-treated, drought-stressed plants modulates proline content in both roots and shoots. Finally, the reduction of the total chlorophyll content was mediated by disruption of the stomata aperture, the augmented levels of antioxidant enzyme activity, and the proline content in JA-treated plants subjected to severe drought stress were all mitigated via the exogenous application of SA, suggesting that SA may modulate JA-induced stomatal closure, even under drought condition.