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<p>Aluminum (Al) toxicity, is a major yield-limiting factor in acid soils, reducing the yield of crop plants including lentil through its adverse effects on the root system. In the present study, a diverse set of 50 genotypes including wild was phenotyped at the seedling stage using root length, root staining score, and root regrowth after staining as well as callose deposition. All traits, except root staining score exhibited significant genetic variability among the genotypes under Al stress condition. Al-tolerant genotypes displayed greater root length and increased root re-growth after root staining, and increased secretion of organic acids such as citrate and malate, which corresponded to lower accumulation of Al and callose in their roots The secretion of organic acids showed strong and positive correlation with root centric traits, while significant negative association with callose and Al accumulation was notices in response to Al stress. These findings indicate that coordinated regulation of organic acid secretion and root-associated traits confers Al tolerance in lentil.</p>

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Root-centric morpho-physiological insights into aluminum tolerance mechanism in lentil

  • 期刊论文

  • 发表日期：

    2026年7月20日

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  • Ankita Tripathi,
  • Raktim Mitra,
  • Keshawanand Tripathi,
  • Dharmendra Singh

摘要

Aluminum (Al) toxicity, is a major yield-limiting factor in acid soils, reducing the yield of crop plants including lentil through its adverse effects on the root system. In the present study, a diverse set of 50 genotypes including wild was phenotyped at the seedling stage using root length, root staining score, and root regrowth after staining as well as callose deposition. All traits, except root staining score exhibited significant genetic variability among the genotypes under Al stress condition. Al-tolerant genotypes displayed greater root length and increased root re-growth after root staining, and increased secretion of organic acids such as citrate and malate, which corresponded to lower accumulation of Al and callose in their roots The secretion of organic acids showed strong and positive correlation with root centric traits, while significant negative association with callose and Al accumulation was notices in response to Al stress. These findings indicate that coordinated regulation of organic acid secretion and root-associated traits confers Al tolerance in lentil.