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<p>The Indo-Gangetic Plains are recognized as India's primary wheat-producing region, playing a crucial role in ensuring food security for the country’s large population. However, in recent years, wheat cultivation in this region has become increasingly vulnerable due to rising temperatures associated with climate change and erratic weather patterns. Boron (B), a vital micronutrient for plant growth and development, has recently gained attention for its potential use as a nutri-priming agent to enhance stress tolerance. This study explores the effectiveness of boron-based nutri-priming in improving heat stress tolerance in two wheat genotypes: one sensitive to high temperatures (G1) and one resistant (G2). A range of morphological, physiological, biochemical, and antioxidant parameters was evaluated at 30, 60, and 90&#xa0;days after sowing (DAS) under two sowing conditions: timely (D1) and late (D2), to assess their response to heat stress. Results indicated that seed pre-treatment with boric acid followed by borax significantly improved morphological traits under both normal and heat stress conditions. In terms of antioxidant activity, borax was found to be the most effective overall. For protein content, boric acid yielded the best results in genotype G1, while borax was more effective in G2. Furthermore, genotype G2 showed a slight advantage over G1 in overall performance, and nitrate reductase activity was higher under timely sown (D1) conditions compared to late sown (D2) conditions. The study identified 8&#xa0;mM boric acid followed by 2&#xa0;mM borax as the optimal seed priming concentration for enhancing wheat performance under heat stress. This finding introduces a novel, eco-friendly, and cost-effective strategy for improving heat resilience in wheat cultivation. In the context of climate change, where rising temperatures increasingly threaten global wheat yields, boron-based priming offers a sustainable adaptation measure that minimizes reliance on synthetic chemicals, supports resource-efficient agriculture, and aligns with long-term goals of climate-smart and environmentally responsible farming systems.</p>

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Optimizing wheat resilience to heat stress via boron-based seed priming: insights from morphological and antioxidant assessments

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • Payal Chakraborty,
  • Kuldeep Rajpoot,
  • Padmanabh Dwivedi

摘要

The Indo-Gangetic Plains are recognized as India's primary wheat-producing region, playing a crucial role in ensuring food security for the country’s large population. However, in recent years, wheat cultivation in this region has become increasingly vulnerable due to rising temperatures associated with climate change and erratic weather patterns. Boron (B), a vital micronutrient for plant growth and development, has recently gained attention for its potential use as a nutri-priming agent to enhance stress tolerance. This study explores the effectiveness of boron-based nutri-priming in improving heat stress tolerance in two wheat genotypes: one sensitive to high temperatures (G1) and one resistant (G2). A range of morphological, physiological, biochemical, and antioxidant parameters was evaluated at 30, 60, and 90 days after sowing (DAS) under two sowing conditions: timely (D1) and late (D2), to assess their response to heat stress. Results indicated that seed pre-treatment with boric acid followed by borax significantly improved morphological traits under both normal and heat stress conditions. In terms of antioxidant activity, borax was found to be the most effective overall. For protein content, boric acid yielded the best results in genotype G1, while borax was more effective in G2. Furthermore, genotype G2 showed a slight advantage over G1 in overall performance, and nitrate reductase activity was higher under timely sown (D1) conditions compared to late sown (D2) conditions. The study identified 8 mM boric acid followed by 2 mM borax as the optimal seed priming concentration for enhancing wheat performance under heat stress. This finding introduces a novel, eco-friendly, and cost-effective strategy for improving heat resilience in wheat cultivation. In the context of climate change, where rising temperatures increasingly threaten global wheat yields, boron-based priming offers a sustainable adaptation measure that minimizes reliance on synthetic chemicals, supports resource-efficient agriculture, and aligns with long-term goals of climate-smart and environmentally responsible farming systems.