Journal of the science of food and agriculture | 2021
Phosphorus mobilization and improvement of crop agronomic performances by a new white-rot fungus Ceriporia lacerata HG2011.
Abstract
BACKGROUND\nSome soil microorganisms can mobilize unavailable phosphorus (P) in soils for plant use and increase P fertilizer efficiency. Thus, an abiotic P solubilization experiment and fungal incubation in solution and soil were conducted to investigate the mobilization of various P compounds by a new white-rot fungus Ceriporia lacerata HG2011. The crop agronomic performances were then evaluated in the winter barley - summer maize - winter wheat rotation field.\n\n\nRESULTS\nC. lacerata HG2011 had a wide P mobilization spectrum, and mobilized P by different mechanisms depending on P sources supplied in liquid culture. The chief mechanism employed by this fungus was the production of protons in mobilizing Ca3 (PO4 )2 , low-molecular-weight organic acids and other unknown substances in FePO4 and AlPO4 , phytase (an inducible enzyme in the presence of phytate) in phytate, and phosphatase in lecithin and ribonucleic acid, respectively. Due to the large fungal biomass, P accumulated in the hypha should not be neglected in the assessment of the fungal P mobilization, rather than only soluble inorganic P. As C. lacerata HG2011 colonized on and in the test soil, phosphatase and phytase activities enhanced but pH decreased in the soil, leading to P mobilization. The application of this fungus mobilized soil P, increased crop P uptake and yields, and consecutively reduced P fertilizer use without yield sacrifices in the multiple crop rotation field.\n\n\nCONCLUSION\nC. lacerata HG2011 showed a new use in mobilizing soil P and reducing P fertilizer input in modern agriculture beyond medical purposes, environmental protection, and biofuel production. This article is protected by copyright. All rights reserved.