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논문 기본 정보
- 자료유형
- 학술저널
- 저자정보
- 저널정보
- 충남대학교 농업과학연구소 Korean Journal of Agricultural Science Korean Journal of Agricultural Science Vol.49 No.3
- 발행연도
- 2022.9
- 수록면
- 463 - 481 (19page)
이용수
초록· 키워드
오류제보하기
Phosphorous (P) is considered to be one of the key essential elements demanded by crop plants. Approximately 70 - 90% of phosphatic fertilizers applied to crops are fixed in soil as Ca, Fe, and Al metal cations, which are insoluble and thus not readily available for plant uptake. Therefore, most soils are deficient in plant available P. This is usually rectified by applying phosphate fertilizers continuously, although this is not economically viable or environmentally acceptable. The present paper reviews the mechanisms involved with phosphate solubilization and mineralization by phosphate solubilizing microorganisms (PSMs) with the associated factors that determine the success. PSMs are effectively involved in mediating the bioavailability of soil P. Their contribution includes mineralization of organic P solubilization of inorganic P minerals, and storing sizable amounts of P in biomass through different mechanisms such as the production of organic and inorganic acids, H₂S, siderophores, exopolysaccharides, and production of enzymes such as phosphatases, phytase, and phosphonatases/C-P lyases, which are capable of chelating the metal ions, forming complexes, and making plant available P. PSMs manifest a wide range of metabolic functions in different environments, resulting in significantly higher plant growth, enhanced soil properties, and increased biological activities. Therefore, development of bio-inoculants with efficient novel PSM strains and further investigations on exploring such strains from diverse ecological niches with multifunctional plant-growth-promoting traits are needed.
목차
ABSTRACT
Introduction
Phosphate solubilizing microorganisms
Mechanisms of phosphate solubilization
Inorganic phosphate solubilization
Organic acid production
Inorganic acids and H₂S production
Proton release from NH₄+ (assimilation/respiration)
Mechanism of indirect phosphate solubilization
Direct oxidation pathway
Exopolysaccharide (EPS) production
Siderophore production
Organic phosphate solubilization
Phosphatases
Phytases
Phosphonatases/C-P lyases
Conclusion
References
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