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<p>The influence of arbuscular mycorrhizal fungi (AMF) inoculation on the growth and physiology of <i>Phaseolus vulgaris</i> L. and <i>Zea mays</i> L. in the Brazilian tropical seasonal dry forest is not well known. We examined the effects of indigenous AMF species inoculation on these two annual crops at phosphorus-deficient soils under glasshouse conditions. The AMF species used as inoculum were collected from the root zone of <i>Mimosa tenuiflora</i>, a native plant of the Caatinga ecoregion. The inoculum was propagated in plastic pots with <i>Trifolium</i> sp. as the host plant. We investigated the effect of four treatments: (1) Control– non-inoculated; (2) <i>Acaulospora</i> inoculum– inoculation with <i>A. tuberculata</i>; (3) <i>Gigaspora</i> inoculum– inoculation with <i>G. gigantea</i>; and (4) Mixed inoculum– inoculation with both <i>Acaulospora</i> and <i>Gigaspora</i> species. We found that inoculation with the indigenous AMF community enhanced plant dry biomass, plant P concentration, root colonization, and physiological responses for both model plants. This study highlighted the importance of exploring the P molecule as an integral element in plant development and presents the AMF inoculation as an efficient alternative to overcome low-P conditions, leading to improved nutrient acquisition in low-fertility soils, better growth conditions through enhanced physiological responses, and ultimately increased plant dry biomass.</p>

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An assessment of plant growth and physiological responses in annual crops grown in P deficient soils inoculated with indigenous arbuscular mycorrhizal fungi

  • 期刊论文

  • 发表日期：

    2025年1月29日

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  • Tancredo Souza,
  • Josefa Bruna Lima dos Santos,
  • Diego Silva Batista

摘要

The influence of arbuscular mycorrhizal fungi (AMF) inoculation on the growth and physiology of Phaseolus vulgaris L. and Zea mays L. in the Brazilian tropical seasonal dry forest is not well known. We examined the effects of indigenous AMF species inoculation on these two annual crops at phosphorus-deficient soils under glasshouse conditions. The AMF species used as inoculum were collected from the root zone of Mimosa tenuiflora, a native plant of the Caatinga ecoregion. The inoculum was propagated in plastic pots with Trifolium sp. as the host plant. We investigated the effect of four treatments: (1) Control– non-inoculated; (2) Acaulospora inoculum– inoculation with A. tuberculata; (3) Gigaspora inoculum– inoculation with G. gigantea; and (4) Mixed inoculum– inoculation with both Acaulospora and Gigaspora species. We found that inoculation with the indigenous AMF community enhanced plant dry biomass, plant P concentration, root colonization, and physiological responses for both model plants. This study highlighted the importance of exploring the P molecule as an integral element in plant development and presents the AMF inoculation as an efficient alternative to overcome low-P conditions, leading to improved nutrient acquisition in low-fertility soils, better growth conditions through enhanced physiological responses, and ultimately increased plant dry biomass.