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<p>Crop wild relatives (CWR) are inherently more resilient to adverse environmental conditions than commercial crops. Understanding the tolerance mechanisms present in their wild counterparts can help increase crop stress tolerance. This study investigated the effects of PEG-6000-induced osmotic stress (0 to 25%) on tolerance traits in forty-two accessions of <i>Vigna</i> species from the section <i>Aconitifoliae</i>. Stress tolerance was evaluated based on germination percentage, growth of seedling, biomass production, chlorophyll content, rate of damamge to the membranes, and accumulation of osmolytes. Multivariate trait analyses revealed that species in the section <i>Aconitifoliae</i> of the genus <i>Vigna</i> were more tolerant to osmotic stress than domesticated lines, exhibiting significant natural variation in their responses to PEG-induced osmotic stress. Discriminant function analysis (DF) identified groups of highly resistant (HR), intermediate resistant (IR), and highly susceptible (HS) accessions. The substantial differences between these groups were validated using multivariate analysis of variance (MANOVA). Although wild <i>Vigna</i> species exhibited better tolerance to osmotic stress than the cultivated <i>Vigna aconitifolia</i> accessions tested, the accession IC-550525 of <i>Vigna stipulacea</i> showed remarkably high tolerance based on growth maintenance under stress. To increase the osmotic stress tolerance of domesticated <i>Vigna</i> species, wild species should be further investigated through forward genetic studies to discover and analyze the genes responsible for their high tolerance.</p>

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Multifaceted Traits of Osmotic Stress Tolerance in Vigna Species: A Study of Section Aconitifoliae from India

  • 期刊论文

  • 发表日期：

    2025年5月26日

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  • Nitin T. Gore,
  • Ganesh D. Mankar,
  • Sumaiya S. Shaikh,
  • Rajkumar B. Barmukh,
  • Pankaj S. Mundada,
  • Suraj D. Umdale,
  • Gayacharan,
  • Nikhil B. Gaikwad,
  • Tukaram D. Nikam,
  • Vitthal T. Barvkar,
  • Mahendra L. Ahire

摘要

Crop wild relatives (CWR) are inherently more resilient to adverse environmental conditions than commercial crops. Understanding the tolerance mechanisms present in their wild counterparts can help increase crop stress tolerance. This study investigated the effects of PEG-6000-induced osmotic stress (0 to 25%) on tolerance traits in forty-two accessions of Vigna species from the section Aconitifoliae. Stress tolerance was evaluated based on germination percentage, growth of seedling, biomass production, chlorophyll content, rate of damamge to the membranes, and accumulation of osmolytes. Multivariate trait analyses revealed that species in the section Aconitifoliae of the genus Vigna were more tolerant to osmotic stress than domesticated lines, exhibiting significant natural variation in their responses to PEG-induced osmotic stress. Discriminant function analysis (DF) identified groups of highly resistant (HR), intermediate resistant (IR), and highly susceptible (HS) accessions. The substantial differences between these groups were validated using multivariate analysis of variance (MANOVA). Although wild Vigna species exhibited better tolerance to osmotic stress than the cultivated Vigna aconitifolia accessions tested, the accession IC-550525 of Vigna stipulacea showed remarkably high tolerance based on growth maintenance under stress. To increase the osmotic stress tolerance of domesticated Vigna species, wild species should be further investigated through forward genetic studies to discover and analyze the genes responsible for their high tolerance.