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<p>Fruit drop is a&#xa0;serious challenge in date palm production, but it can be mitigated through various approaches. One of the most effective approaches for mitigating fruit drop is the foliar application of plant growth regulators (PGRs). Gibberellic acid (GA<sub>3</sub>) is a&#xa0;promising growth regulator that plays a&#xa0;pivotal role in plant growth and development, particularly in enhancing fruit quality and mitigating fruit drop. Exogenous application of GA<sub>3</sub> has been extensively explored to address pre-harvest fruit drop in horticultural crops. This investigation is targeted to assess the impact of GA<sub>3</sub> to mitigate fruit drop and enhance the quality of fruits in ‘Hillavi’ and ‘Khudravi’ date palm cultivars. The study was carried out at the Postgraduate Agriculture Research Station (PARS), Faisalabad, Pakistan, using a&#xa0;randomized complete block design (RCBD). Three GA<sub>3</sub> concentrations (75 ppm, 150 ppm, and 225 ppm) were applied at the Kimri stage of date fruit development. The results revealed that exogenous spraying of GA<sub>3</sub> significantly reduced fruit drop while improving fruit development and growth. Notable improvements were observed in bunch weight, pulp weight, fruit breadth, fruit weight, fruit length, moisture percentage, ascorbic acid, total sugar content, reducing and non-reducing sugars, total soluble solids (TSS), and tannin content. Additionally, the exogenous application of GA<sub>3</sub> improved antioxidant enzyme activities, including peroxidase and catalase, along with flavonoid and phenolic contents as compared to the control treatment (Ck). This research highlights the potential of phytohormones, particularly GA<sub>3</sub>, as an effective strategy to mitigate fruit drop while enhancing fruit quality in date palm, underscoring their importance in sustainable horticultural practices.</p>

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Investigating the Role of Gibberellic Acid in Fruit Drop Mitigation and Fruit Quality Improvement in Date Palm Cultivars

  • 期刊论文

  • 发表日期：

    2025年6月13日

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  • Hammad Hussain,
  • Yue Yu,
  • Abdul Haseeb Ahmed,
  • Faisal Hayat,
  • Muhammad Awais,
  • Abdullah Ma’Arij,
  • Guo Wei,
  • Rashad Qadri

摘要

Fruit drop is a serious challenge in date palm production, but it can be mitigated through various approaches. One of the most effective approaches for mitigating fruit drop is the foliar application of plant growth regulators (PGRs). Gibberellic acid (GA3) is a promising growth regulator that plays a pivotal role in plant growth and development, particularly in enhancing fruit quality and mitigating fruit drop. Exogenous application of GA3 has been extensively explored to address pre-harvest fruit drop in horticultural crops. This investigation is targeted to assess the impact of GA3 to mitigate fruit drop and enhance the quality of fruits in ‘Hillavi’ and ‘Khudravi’ date palm cultivars. The study was carried out at the Postgraduate Agriculture Research Station (PARS), Faisalabad, Pakistan, using a randomized complete block design (RCBD). Three GA3 concentrations (75 ppm, 150 ppm, and 225 ppm) were applied at the Kimri stage of date fruit development. The results revealed that exogenous spraying of GA3 significantly reduced fruit drop while improving fruit development and growth. Notable improvements were observed in bunch weight, pulp weight, fruit breadth, fruit weight, fruit length, moisture percentage, ascorbic acid, total sugar content, reducing and non-reducing sugars, total soluble solids (TSS), and tannin content. Additionally, the exogenous application of GA3 improved antioxidant enzyme activities, including peroxidase and catalase, along with flavonoid and phenolic contents as compared to the control treatment (Ck). This research highlights the potential of phytohormones, particularly GA3, as an effective strategy to mitigate fruit drop while enhancing fruit quality in date palm, underscoring their importance in sustainable horticultural practices.