Summary
This greenhouse study screened 44 arbuscular mycorrhizal fungal isolates spanning 18 species and five AMF orders to evaluate their effects on leek growth and nutrient uptake. The results reveal substantial variation in plant benefit depending on fungal identity and phylogeny: ancient AMF families (Archaeosporaceae and Paraglomeraceae) were generally less beneficial for plant growth and nutrient acquisition than more recent families (Glomeraceae, Entrophosporaceae, and Diversisporaceae). The findings underscore that not all mycorrhizal associations are equally effective, with significant implications for understanding plant–fungal symbiosis and potentially informing selection of AMF for horticultural production.
Regional applicability
The findings are relevant to UK horticulture, particularly allium and vegetable production, where AMF inoculants are increasingly considered for soil health and nutrient uptake enhancement. Understanding that phylogenetic identity predicts AMF effectiveness could inform selection of native or introduced fungal strains for UK growing systems, though field validation under temperate climate conditions would strengthen practical application.
Key measures
Plant growth response (percentage change), nutrient uptake, root colonisation levels, AMF family identity and phylogenetic age
Outcomes reported
The study measured plant growth response (ranging from −19% to +232%) and nutrient uptake in leek plants inoculated with 44 different AMF isolates, and assessed whether ancient versus recently evolved AMF lineages differed in their effectiveness. Root colonisation levels were also quantified across different AMF families.
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