Potential Piriformospora indica effect on growth and mineral nutrition of Phaseolus vulgaris crop under low phosphorus intake
2021
Beltayef, Hayet | Melki, Mongi | Saidi, Wafa | Hajri, Rim | Cruz Mínguez, Cristina | Muscolo, Adele | ben Youness, Mongi
The aim of this study was the mycorrhizae inoculation effect on production and mineral nutrition of snap bean variety under low phosphorus intake. The experiment was a randomized block design with four treatments: a non-mycorrhizal control, two mycorrhizal strains: Piriformospora indica (Piri), Glomus intraradice (Glomus), and their combined inoculation Piri + Glomus; using ten replicates per treatment. A comparative trial of different treatments on plant growth, yield parameters, mineral absorption and mycorrhizae colonization frequency was conducted in the greenhouse under controlled conditions using autoclaved soil-sand-vermiculite substrate. The inoculation with Piri and co-inoculation with Piri + Glomus significantly increased aerial dry biomass (p ≤ 0.01) and highly increased root dry biomass (p ≤ 0.001). Mycorrhizal snap bean plants showed a significantly higher number of pods, pods dry weight, dry weight of seeds per plant, and percentage of mycorrhizal colonization than non-mycorrhizal plants. Mycorrhizae inoculation increased significantly nitrogen and phosphorus uptake that the inoculation with Piri increased N uptake in roots by 187% and P uptake by 200% compared to the non-inoculated plants. For cations leave incorporation, Piri significantly enhanced Ca²⁺ by 100%, Mg²⁺ by 110% and NH₄⁺ by 175% relative to the non-mycorrhizal plants. While mycorrhizal inoculation doesn’t have a significant effect on K⁺ nutrition. In conclusion, snap bean Contender variety seedling inoculated with Piri proved to be most effective by improving plant growth, mineral nutrition and yield production under low phosphorus uptake.
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