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<p>Field pea is most important, short-duration, cool-season, diploid pulse crop that plays a significant role in enhancing food and nutritional security of growing population. To investigate drought resilience, fifteen tolerant and five sensitive genotypes were evaluated based on RSI and seed yield. Significant variation was observed in key physiological and biochemical traits. Tolerant genotypes (HFP 1428, HFP 1129, HFP 920) exhibited higher antioxidant enzyme activities (POX, SOD, CAT) and greater accumulation of anthocyanins and flavonoids, coupled with smaller reductions in relative water content (RWC) and nitrogen balance index (NBI) under stress. Stage-wise analysis revealed that the grain-filling stage exhibited stronger antioxidant and secondary metabolite responses, while higher chlorophyll content, NDVI and NBI were recorded at flowering. These findings highlight that tolerant genotypes mitigated drought effects through enhanced physiological and biochemical regulation, unlike sensitive genotypes (Pant P-399, Pant P-516, NDP 2018-3). The results provide valuable insights for breeding drought-resistant field pea genotypes to strengthen resilience and food security under water-limited conditions.</p>

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Temporal Modulation of Physiological and Biochemical Mechanisms Enhances Drought Tolerance Across Developmental Stages in Field Pea (Pisum sativum L.)

  • 期刊论文

  • 发表日期：

    2025年11月27日

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  • Amit Sharma,
  • Ravika Sheoran,
  • Rajesh Yadav,
  • Pawan Kumar,
  • Kavita Dhaka,
  • Deepak Kaushik,
  • Jyoti Duhan,
  • Naresh

摘要

Field pea is most important, short-duration, cool-season, diploid pulse crop that plays a significant role in enhancing food and nutritional security of growing population. To investigate drought resilience, fifteen tolerant and five sensitive genotypes were evaluated based on RSI and seed yield. Significant variation was observed in key physiological and biochemical traits. Tolerant genotypes (HFP 1428, HFP 1129, HFP 920) exhibited higher antioxidant enzyme activities (POX, SOD, CAT) and greater accumulation of anthocyanins and flavonoids, coupled with smaller reductions in relative water content (RWC) and nitrogen balance index (NBI) under stress. Stage-wise analysis revealed that the grain-filling stage exhibited stronger antioxidant and secondary metabolite responses, while higher chlorophyll content, NDVI and NBI were recorded at flowering. These findings highlight that tolerant genotypes mitigated drought effects through enhanced physiological and biochemical regulation, unlike sensitive genotypes (Pant P-399, Pant P-516, NDP 2018-3). The results provide valuable insights for breeding drought-resistant field pea genotypes to strengthen resilience and food security under water-limited conditions.