Isolation and Identification of Two Potassium Solubilizing Fungi from Arid Soil

Growth Enhancement of Arabidopsis (Arabidopsis thaliana) and Onion (Allium cepa) With Inoculation of Three Newly Identified Mineral-Solubilizing Fungi in the Genus Aspergillus Section Nigri

“…Soil fungi have been known for the important microorganisms that are involved in the biogeochemical cycling of elements in the terrestrial environment (Gadd, 2010(Gadd, , 2017Frac et al, 2018). Several previous studies have determined that soil fungi in the genera Aspergillus, Arthroderma, Apophysomyces, Fusarium, Geotrichum, Mucor, Penicillium, Rhizopus, Talaromyces, Trichoderma, and Tritirachium could effectively solubilize various insoluble minerals (Akintokun et al, 2007;Acevedo et al, 2014;Kanse et al, 2015;Patel et al, 2015;Yin et al, 2015;Zhao and Zhang, 2015;Gaind, 2016;Kasana et al, 2017;Karmakar et al, 2018;Khuna et al, 2019). In this study, all pure fungal strains of A. chiangmaiensis, A. pseudopiperis, and A. pseudotubingensis were able to solubilize different insoluble minerals (cobalt, copper, ferric, magnesium, manganese, phosphorus, zinc-containing minerals, feldspar, and kaolin), while the solubilization process indicated the very different activities of the different minerals.…”

“…Additionally, the phosphate solubilization was found in some Aspergillus species categorized in other Aspergillus sections, e.g., Aspergillus clavatus, Aspergillus flavus, Aspergillus floccosus, Aspergillus fumigatus, Aspergillus niveus, and Aspergillus versicolor (Alam et al, 2002;Yadav et al, 2011Yadav et al, , 2020Mahamuni et al, 2012;Das et al, 2013;Verma and Ekka, 2015;Ceci et al, 2018;Islam et al, 2019). Furthermore, the solubilization abilities of cobalt, ferric, manganese, phosphorus, zinc-containing minerals, and feldspar in A. niger and A. tubingensis isolated from soil have been reported (Sayer et al, 1995;Gaind, 2016;Kasana et al, 2017;Bakri, 2019). Previous studies have demonstrated that several mineral-solubilizing fungi could solubilize inorganic minerals into available forms through mechanisms that mainly involve the production of organic acids (e.g., citric, fumaric, gluconic, malic, succinic, tartaric, and oxalic acids), hydrolytic enzymes (phytase and phosphatases of phosphorus), and metal-chelating substances (Pawar and Thaker, 2009;Jain et al, 2012bJain et al, , 2014Acevedo et al, 2014;Xiao et al, 2015;Zhao and Zhang, 2015).…”

Potassium Releasing Bacteria for Unlocking Soil Potassium- A Way Forward for Judicious Use of Chemical Fertilizers

“…(S-18), isolated from rape rhizospheric soil enhanced the potassium uptake in rye grass, growth vigour, and biomass yield [55]. Kasana et al [76], reported that the potassium solubilizing fungal strain, Fomitopsis meliae RCKF7 when treated with the seeds of wheat showed increased shoot dry weight, weight of spikes and grain yield. In rice samples inoculated with KRB isolates, KSB 37, KSB 39 and KSB 44, grain yield and K uptake was prominent.…”

Guar (Cyamopsis tetragonoloba L.): A Potential Candidate for the Rehabilitation of Feldspar Mine Spoil Amended with Bioinoculants

“…Phosphate solubilization by rhizobacterial isolates may be influenced by the production of organic acids such as formic, acetic, propionic, lactic, glycolic, fumaric and succinic acids (Yasmin et al, 2009), resulting in mineralization and mobilization of unavailable soil P, thus helping in increased uptake of P by the plants (Dotaniya et al, 2014). Feldspar has insoluble form of potassium (8-10%) and therefore, this K could be effectively utilized by native potassium solubilizing microorganisms (Kasana et al, 2017). Similarly, Ullaman et al (1996), has seen absorption of K enhanced rapidly upon introduction of Bacillus mucilaginosus that can solubilize rock K mineral such as potash feldspar by production and excretion of organic acids.…”