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A novel microcosm to identify inherently competitive microorganisms with the ability to mineralize phytate in solum

Soil Ecology Letters 2021年第4期3卷 367-382页

作者： Sabrina M.Pittroff Stefan Olsson Ashlea Doolette Ralf Greiner Alan E.Richardson mette haub.erg nicolaisen Microbial Ecology and Biotechnology Department of Plant and Environmental SciencesFaculty of ScienceUniversity of CopenhagenThorvaldsensvej 401871 Frederiksberg CDenmark State Key Laboratory for Ecological Pest Control of Fujian and Taiwan Crops College of Plant ProtectionFujian Agriculture and Forestry UniversityFuzhou 350002China CSIRO Agriculture and Food PO Box 1700CanberraACT2601Australia Department of Food Technology and Bioprocess Engineering Max Rubner InstitutKarlsruheGerman School of Agriculture Food and WineWaite Research InstituteThe University of AdelaideWaite Campus UrrbraeSA5064 Australia Plant Immunity Center Haixia Institute of Science and TechnologyFujian Agriculture and Forestry UniversityFuzhou 350002China

Fertilizer phosphorus(P)is a finite resource,necessitating the development of innovative solutions for P fertilizer efficiency in agricultural ***-inositol hexakisphosphate(phytate)constitutes the majority of identified organic P in many soil types and is poorly available to *** phytase-producing biofertilizers into soil presents a viable and environmentally acceptable way of utilizing P from phytate,while reducing the need for mineral P application.A deeper understanding of the microbial ecology in relation to degradation of phytate under natural soil conditions is however needed to obtain successful biofertilizer candidates able to compete in complex soil *** we present the development of a microcosm for studying microbial communities able to colonize and utilize Ca-phytate hotspots in *** results provide evidence that the recruited microbial population mineralizes ***,quantification of bacterial genes associated with organic P cycling in alkaline soils indicated that the phosphatases PhoX and PhoD may play a larger role in phytate mineralization in soil than previously *** sequencing and BioLog®catabolism studies show that hotspots containing Ca-phytate,recruited a different set of microorganisms when compared to those containing an addition of C source alone,with the genus Streptomyces specifically *** propose that Streptomyces represents an hitherto unexplored resource as P biofertilizer with competitive advantage for utilizing CaPhy in an inherently competitive soil *** further conclude that the use of our newly designed microcosm presents an innovative approach for isolating soil microorganisms with the potential to degrade precipitated phytate in solum.

关键词： Myo-inositol hexakisphosphate(phytate) Soil microcosm Soil microbial ecology Biofertilizers Alkaline phosphatase β-propeller phytase(BPP)

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