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<p>Drought stress has a significant abiotic impact on present and future worldwide agricultural production, as well as on plant physiology, development, and yield. Establishing arbuscular mycorrhizal fungi (AMF) symbiosis is a crucial component in helping plants cope with drought circumstances. In this context, we investigated the effects of an indigenous microbial consortium on the leaf water status, photosynthesis indices, and accumulation of compatible solutes in <i>Argania spinosa</i> (Argan) seedlings subjected to drought stress. The study focused on two distinct argan provenances (Admine and Lakhsas) over a period of twelve-month, under two levels of drought stress (30% and 60%, compared to a control of 100% of field capacity). Results showed that microbial inoculation significantly improved leaf water potential, stomatal conductance, and chlorophyll fluorescence in both provenances under well-watered and drought conditions, with more pronounced effects under severe stress (30% FC). In contrast, non-mycorrhizal seedlings accumulated higher levels of glucose and fructose, whereas sucrose content was generally higher in mycorrhizal plants. These findings suggest that the Rhizargan consortium enhances drought tolerance in argan seedlings by improving physiological performance and modulating osmolyte accumulation.</p>

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Enhancement of drought tolerance in Argan tree by an indigenous consortium of AMF: Changes in photosynthetic apparatus and carbohydrate metabolism

  • 期刊论文

  • 发表日期：

    2026年6月1日

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  • Merieme Soufiani,
  • Abdelghani Chakhchar,
  • Salama Aissam,
  • Abderrahim Ferradous,
  • Allal Douira,
  • Abdelilah Meddich,
  • Cherkaoui El Modafar

摘要

Drought stress has a significant abiotic impact on present and future worldwide agricultural production, as well as on plant physiology, development, and yield. Establishing arbuscular mycorrhizal fungi (AMF) symbiosis is a crucial component in helping plants cope with drought circumstances. In this context, we investigated the effects of an indigenous microbial consortium on the leaf water status, photosynthesis indices, and accumulation of compatible solutes in Argania spinosa (Argan) seedlings subjected to drought stress. The study focused on two distinct argan provenances (Admine and Lakhsas) over a period of twelve-month, under two levels of drought stress (30% and 60%, compared to a control of 100% of field capacity). Results showed that microbial inoculation significantly improved leaf water potential, stomatal conductance, and chlorophyll fluorescence in both provenances under well-watered and drought conditions, with more pronounced effects under severe stress (30% FC). In contrast, non-mycorrhizal seedlings accumulated higher levels of glucose and fructose, whereas sucrose content was generally higher in mycorrhizal plants. These findings suggest that the Rhizargan consortium enhances drought tolerance in argan seedlings by improving physiological performance and modulating osmolyte accumulation.