Saprotrophic soil fungi to improve phosphorus solubilisation and release: In vitro abilities of several species

Abstract

Modern agriculture is dependent on phosphate rock (PR), which is a nonrenewable resource. Improvement of phosphorus (P) availability for crops in agricultural soils represents a key strategy to slow down the depletion of PR. The aim of this study was to identify potential P biofertilisers among saprotrophic fungal species. We tested 30 fungal strains belonging to 28 taxa (4 Zygomycota and 24 Ascomycota) and with different life strategies. The study showed that many saprotrophic fungi have the ability to mobilise P from insoluble forms according to a variety of mechanisms. Our results expand the pool of P solubilising fungal species, also suggesting a new solubilisation index and shedding light on parameters that could be basic in the selection of efficient soil P-biofertilisers fungi. Rhizopus stolonifer var. stolonifer, Aspergillus niger and Alternaria alternata were found to be the best performing strains in terms of amounts of TCP solubilisation.

Microbe‐Mediated Extracellular and Intracellular Mineralization: Environmental, Industrial, and Biotechnological Applications

“…[ 74 ] Organic phosphate mineralization in soil is mainly dependent on the phosphatases derived from microbe s or plant excretion. [ 75 ] As the principle storage form of phosphorus in many plants, phytin acid can release phosphate radicals at certain pH values. The A. mycorrhizala fungal mycelium is capable of absorbing NH 4 + ions and cause hyphosphere acidification.…”

Screening of Phosphate-Solubilizing Fungi From Air and Soil in Yunnan, China: Four Novel Species in Aspergillus, Gongronella, Penicillium, and Talaromyces

“…For fungi, Rhizopus stolonifer var. stolonifer , Aspergillus niger , and Alternaria alternata have been found in the literature to be the most effective strains with respect to the amount of TCP solubilization by Ceci et al (2018) . However, solubilization by PSF depends on the insoluble inorganic phosphate source, type of carbon, nitrogen and metal ions in soils and culture conditions ( Richardson and Simpson, 2011 ; Jyoti et al, 2013 ).…”

When Salt Meddles Between Plant, Soil, and Microorganisms

“…Amongst studied fungal genera, the highest P-solubilizing ability was attributed to Aspergillus and Trichoderma species. Ceci et al (2018) showed that many saprotrophic fungi could mobilize P from insoluble forms according to a variety of mechanisms, with strains of Rhizopus stolonifer var. stolonifer, Aspergillus niger and Alternaria alternata among the best performing strains in terms of amounts of insoluble phosphate solubilisation.…”