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<p>Rootstocks significantly influence grapevine physiology, photosynthetic efficiency, antioxidant enzyme activity, oxidative stress tolerance, and postharvest quality. This study aimed to evaluate the effects of four different rootstocks viz., Dogridge, 110R, 140Ru, and 1103P, on the physiology, antioxidant enzyme activity, and berry quality of ‘Crimson Seedless’ grapes grown in semi-arid tropical climate. A&#xa0;randomized block design with five replicates per rootstock was used, and key parameters, including photosynthetic efficiency, chlorophyll content, antioxidant enzyme activity (catalase and peroxidase), oxidative stress (malondialdehyde content), yield, and postharvest quality, were assessed across berry setting, veraison, and harvest stages. The results demonstrated that 1103P conferred the highest photosynthetic efficiency from berry setting to harvest (12.45–7.70 μmol CO<sub>2</sub> m⁻<sup>2</sup> s⁻<sup>1</sup>), enhanced antioxidant enzyme activity, and the lowest malondialdehyde (MDA) level (2.55–4.86 nmol/g FW), indicating superior oxidative stress tolerance and membrane stability along with moderate yield (8.67 kg/vine). This also contributed to improved postharvest shelf life due to reduced oxidative damage and better fruit firmness retention, followed by Dogridge. In contrast, 110R and 140Ru had lower antioxidant defense mechanisms and higher oxidative stress, leading to reduced photosynthesis efficiency. These findings suggest that 1103P is the most suitable rootstock, followed by Dogridge for enhancing vine performance, stress resilience, fruit quality, and postharvest longevity in ‘Crimson Seedless’ under semi-arid conditions. This study provides valuable insights for rootstock selection to improve vineyard sustainability and commercial viability in the regions.</p>

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Optimizing Rootstock Choice for Enhanced Photosynthetic Efficiency, Antioxidant Activity and Yield of Grapes Under Semi-arid Climate

  • 期刊论文

  • 发表日期：

    2025年8月27日

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  • N. A. Deshmukh,
  • S. R. Takale,
  • N. M. Patil,
  • S. D. Gat,
  • P. H. Nikumbhe,
  • K. Banerjee

摘要

Rootstocks significantly influence grapevine physiology, photosynthetic efficiency, antioxidant enzyme activity, oxidative stress tolerance, and postharvest quality. This study aimed to evaluate the effects of four different rootstocks viz., Dogridge, 110R, 140Ru, and 1103P, on the physiology, antioxidant enzyme activity, and berry quality of ‘Crimson Seedless’ grapes grown in semi-arid tropical climate. A randomized block design with five replicates per rootstock was used, and key parameters, including photosynthetic efficiency, chlorophyll content, antioxidant enzyme activity (catalase and peroxidase), oxidative stress (malondialdehyde content), yield, and postharvest quality, were assessed across berry setting, veraison, and harvest stages. The results demonstrated that 1103P conferred the highest photosynthetic efficiency from berry setting to harvest (12.45–7.70 μmol CO2 m⁻2 s⁻1), enhanced antioxidant enzyme activity, and the lowest malondialdehyde (MDA) level (2.55–4.86 nmol/g FW), indicating superior oxidative stress tolerance and membrane stability along with moderate yield (8.67 kg/vine). This also contributed to improved postharvest shelf life due to reduced oxidative damage and better fruit firmness retention, followed by Dogridge. In contrast, 110R and 140Ru had lower antioxidant defense mechanisms and higher oxidative stress, leading to reduced photosynthesis efficiency. These findings suggest that 1103P is the most suitable rootstock, followed by Dogridge for enhancing vine performance, stress resilience, fruit quality, and postharvest longevity in ‘Crimson Seedless’ under semi-arid conditions. This study provides valuable insights for rootstock selection to improve vineyard sustainability and commercial viability in the regions.