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<p>Drought stress is a serious paramount threat to sustainable crop production worldwide. However, a novel strategy to increase water use efficiency is the application of biochar, aiding in reducing the effects of drought stress in an affordable manner. Current research aimed to determine whether biochar could cope with the drought stress in loki (<i>Laginaria siceraria</i>). Impact biochar concentrations (500, 1000, 1500&#xa0;mg/L) on the growth of two varieties (Long and Round) of loki grown under drought stress were analyzed in the form of growth attributes, photosynthetic status by DUAL PAM as well as quantification of antioxidants (Proline, CAT &amp; SOD). Although drought stress negatively influenced the plant growth, photosynthetic activities like Y (II), Y (I), ETR-I and ETR-II and antioxidant enzymes: CAT &amp; SOD along with an accumulation of proline. Conversely, plants treated with biochar specifically with a concentration of 1500&#xa0;mg/L had a profound effect on the protection of PS II through the protective component of non-photochemical quenching (NPQ) with downregulation of electron transport rate (ETR) by lowering reactive oxygen species (ROS). Thus, the application of biochar enhances the development of NPQ indirectly preventing drought-induced photo inhibition and enhancing the plant’s photosynthetic efficiency. There is a synergistic effect of biochar in strengthening the growth and photosynthetic activity of L. <i>siceraria</i>, altering its physiological and antioxidant status under water deficit conditions. It is recommended that the use of biochar can be crucial under drought stress circumstances, improving vegetable crops’ capacity to withstand drought conditions at the field level.</p>

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Synergistic Effect of Biochar on the Growth, Photosynthesis and Antioxidant System of Laginaria siceraria Under Drought Stress

  • 期刊论文

  • 发表日期：

    2025年3月18日

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  • Sadia Bashir,
  • Tayyaba Arshad,
  • Habib-ur-Rehman Athar,
  • Rifat Hayat

摘要

Drought stress is a serious paramount threat to sustainable crop production worldwide. However, a novel strategy to increase water use efficiency is the application of biochar, aiding in reducing the effects of drought stress in an affordable manner. Current research aimed to determine whether biochar could cope with the drought stress in loki (Laginaria siceraria). Impact biochar concentrations (500, 1000, 1500 mg/L) on the growth of two varieties (Long and Round) of loki grown under drought stress were analyzed in the form of growth attributes, photosynthetic status by DUAL PAM as well as quantification of antioxidants (Proline, CAT & SOD). Although drought stress negatively influenced the plant growth, photosynthetic activities like Y (II), Y (I), ETR-I and ETR-II and antioxidant enzymes: CAT & SOD along with an accumulation of proline. Conversely, plants treated with biochar specifically with a concentration of 1500 mg/L had a profound effect on the protection of PS II through the protective component of non-photochemical quenching (NPQ) with downregulation of electron transport rate (ETR) by lowering reactive oxygen species (ROS). Thus, the application of biochar enhances the development of NPQ indirectly preventing drought-induced photo inhibition and enhancing the plant’s photosynthetic efficiency. There is a synergistic effect of biochar in strengthening the growth and photosynthetic activity of L. siceraria, altering its physiological and antioxidant status under water deficit conditions. It is recommended that the use of biochar can be crucial under drought stress circumstances, improving vegetable crops’ capacity to withstand drought conditions at the field level.