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<p>This study investigates the effects of two AMF inocula, native AMF consortium “Rhizolive consortium” (RC) and the commercial strain “<i>Rhizophagus irregularis</i>” (RI), on growth, biomass accumulation, and physiological traits of the 'Picholine Marocaine' olive cultivar under greenhouse conditions. Our results showed that both AMF inocula successfully established symbiotic relationships; however, mycorrhizal frequency and intensity did not differ significantly between treatments. Notably, arbuscule colonization was significantly higher in RC-inoculated plants than in those inoculated with RI, while RI exhibited slightly higher vesicle colonization compared to RC. RC-inoculated plants exhibited greater shoot height 52 cm, and developed an average of 55 leaves. Biomass accumulation also increased by approximately 34% and 38% in for fresh and dry shoot weights, respectively. In terms of physiological performance, RC-inoculated plants displayed enhanced stomatal conductance and chlorophyll fluorescence by about 21% and 2.5%, respectively. Moreover, chlorophyll a, total chlorophyll, and carotenoid contents were markedly higher in RC-inoculated plants than RI treatment. These findings demonstrate the potential of native AMF consortia, isolated from olive rhizospheres, to enhance root colonization, growth, and physiological efficiency of the 'Picholine Marocaine' olive cultivar, highlighting their relevance as sustainable alternatives to commercial mycorrhizal inoculants.</p>

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Evaluating the impact of native and commercial mycorrhizal inoculants on growth and physiology of the 'Picholine Marocaine' olive cultivar

  • 期刊论文

  • 发表日期：

    2026年1月23日

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  • Hanane Boutaj,
  • Abdelilah Meddich,
  • Allal Douira,
  • Cherkaoui El Modafar

摘要

This study investigates the effects of two AMF inocula, native AMF consortium “Rhizolive consortium” (RC) and the commercial strain “Rhizophagus irregularis” (RI), on growth, biomass accumulation, and physiological traits of the 'Picholine Marocaine' olive cultivar under greenhouse conditions. Our results showed that both AMF inocula successfully established symbiotic relationships; however, mycorrhizal frequency and intensity did not differ significantly between treatments. Notably, arbuscule colonization was significantly higher in RC-inoculated plants than in those inoculated with RI, while RI exhibited slightly higher vesicle colonization compared to RC. RC-inoculated plants exhibited greater shoot height 52 cm, and developed an average of 55 leaves. Biomass accumulation also increased by approximately 34% and 38% in for fresh and dry shoot weights, respectively. In terms of physiological performance, RC-inoculated plants displayed enhanced stomatal conductance and chlorophyll fluorescence by about 21% and 2.5%, respectively. Moreover, chlorophyll a, total chlorophyll, and carotenoid contents were markedly higher in RC-inoculated plants than RI treatment. These findings demonstrate the potential of native AMF consortia, isolated from olive rhizospheres, to enhance root colonization, growth, and physiological efficiency of the 'Picholine Marocaine' olive cultivar, highlighting their relevance as sustainable alternatives to commercial mycorrhizal inoculants.