Phosphate-Solubilizing Microorganisms: A Critical Review

Kishore, Nand; Pindi, Pavan Kumar; Reddy, S. Ram

doi:10.1007/978-81-322-2286-6_12

Cited by 32 publications

(22 citation statements)

References 118 publications

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“…(ArHy-505), and Enterobacter sp. (EnHy-402), and concluded that the concentration of EPS and microbial origin were responsible for solubilization (Kishore et al 2015). EPS production by soil microflora is also enhanced under stress conditions, as evident from the study of Silambarasan et al (2019).…”

Section: Exopolysaccharide (Eps) Productionmentioning

confidence: 96%

“…Organic acids like citric acid, gluconic acid, oxalic acid, and tartaric acid exuded by PSMs solubilize inorganic phosphates by (a) chelation of cations bound to phosphate, (b) reducing pH, (c) complexation with metal ions bound to phosphates, and (d) challenging P for adsorption site (Kishore et al 2015). Organic acids are low molecular weight compounds that chelate the phosphorus-bound cation through their hydroxyl and carboxyl groups and lower the rhizospheric pH through the gaseous exchange (O 2 /CO 2 ) and proton-bicarbonate balance, thereby releasing the bound phosphorus (Kim et al 1997).…”

Section: Production Of Organic Acidsmentioning

confidence: 99%

“…It also plays a role in respiration in plants (Khan et al 2010) and fixation of nitrogen in leguminous crops (Hutchins et al 2019). Phosphorus in top soil generally accounts for 50 to 3000 mg kg − 1 of soil, yet only 0.1% of total phosphorus is available for plant uptake (Zou et al 1992;Zhu et al 2018), due to precipitation with cations in soil, immobilization, adsorption, and interconversion to organic form (Kishore et al 2015). Consequently, there has been an increase over the years in the demand for and use of phosphatic fertilizers to maintain a continuous supply of phosphorus in plants, as illustrated in Table 1.…”

Section: Introductionmentioning

confidence: 99%

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Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Rawat

Das

Shankhdhar

et al. 2020

J Soil Sci Plant Nutr

226

130

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Phosphorus is the second most critical macronutrient after nitrogen required for metabolism, growth, and development of plants. Despite the abundance of phosphorus in both organic and inorganic forms in the soil, it is mostly unavailable for plant uptake due to its complexation with metal ions in the soil. The use of agrochemicals to satisfy the demand for phosphorus to improve crop yield has led to the deterioration of the ecosystem and soil health, as well as an imbalance in the soil microbiota. Consequently, there is a demand for an alternate cost-effective and eco-friendly strategy for the biofortification of phosphorus. One such strategy is the application of phosphate-solubilizing microorganisms which can solubilize insoluble phosphates in soil by different mechanisms like secretion of organic acids, enzyme production, and excretion of siderophores that can chelate the metal ions and form complexes, making phosphates available for plant uptake. These microbes not only solubilize phosphates but also promote plant growth and crop yield by producing plant-growth-promoting hormones like auxins, gibberellins, and cytokinins, antibiosis against pathogens, 1-aminocyclopropane-1-carboxylic acid deaminase which enhances plant growth under stress conditions, improving plant resistance to heavy metal toxicity, and so on. Pyrroloquinoline quinine (pqq) and glucose dehydrogenase (gcd) are the representative genes for phosphorus solubilization in microorganisms. The content presented in this review paper focuses on different mechanisms and modes of action of phosphate-solubilizing microorganisms, their contribution to phosphorus solubilization, growth-promoting attributes in plants, and the molecular aspects of phosphorus solubilization.

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Section: Exopolysaccharide (Eps) Productionmentioning

confidence: 96%

Section: Production Of Organic Acidsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Rawat

Das

Shankhdhar

et al. 2020

J Soil Sci Plant Nutr

226

130

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“…With regards to P biosolubilization, evidence of the involvement of some soil microorganisms in this phenomenon is by no means novel, dating back to early 1903 ( Kishore et al, 2015 ). It is predominantly works by Gerretsen (1948) and Pikovskaya (1984) which unfolded for the first time the ability of some microorganisms to solubilize insoluble P. This led afterward to the discovery of several P solubilizing microorganisms (PSMs) beneficial bacteria and fungi, living in close association with plants.…”

Section: Microbially-mediated N and P In Soilsmentioning

confidence: 99%

Soil Microbial Resources for Improving Fertilizers Efficiency in an Integrated Plant Nutrient Management System

et al. 2018

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Tomorrow’s agriculture, challenged by increasing global demand for food, scarcity of arable lands, and resources alongside multiple environment pressures, needs to be managed smartly through sustainable and eco-efficient approaches. Modern agriculture has to be more productive, sustainable, and environmentally friendly. While macronutrients such as nitrogen (N), phosphorus (P), potassium (K), and sulfur (S) supplied by mineral fertilizers are vital to crop production, agriculturally beneficial microorganisms may also contribute directly (i.e., biological N2 fixation, P solubilization, and phytohormone production, etc.) or indirectly (i.e., antimicrobial compounds biosynthesis and elicitation of induced systemic resistance, etc.) to crop improvement and fertilizers efficiency. Microbial-based bioformulations that increase plant performance are greatly needed, and in particular bioformulations that exhibit complementary and synergistic effects with mineral fertilization. Such an integrated soil fertility management strategy has been demonstrated through several controlled and non-controlled experiments, but more efforts have to be made in order to thoroughly understand the multiple functions of beneficial microorganisms within the soil microbial community itself and in interaction with plants and mineral resources. In fact, the combined usage of microbial [i.e., beneficial microorganisms: N2-fixing (NF), P-solubilizing, and P mobilizing, etc.] and mineral resources is an emerging research area that aims to design and develop efficient microbial formulations which are highly compatible with mineral inputs, with positive impacts on both crops and environment. This novel approach is likely to be of a global interest, especially in most N- and P-deficient agro-ecosystems. In this review, we report on the importance of NF bacteria and P solubilizing/mobilizing microbes as well as their interactions with mineral P fertilization in improving crop productivity and fertilizers efficiency. In addition, we shed light on the interactive and synergistic effects that may occur within multi-trophic interactions involving those two microbial groups and positive consequences on plant mineral uptake, crop productivity, and resiliency to environmental constraints. Improving use of mineral nutrients is a must to securing higher yield and productivity in a sustainable manner, therefore continuously designing, developing and testing innovative integrated plant nutrient management systems based on relevant biological resources (crops and microorganisms) is highly required.

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“…Entretanto, seu número é baixo para competir com outros microrganis-mos, tornando difícil a promoção de crescimento de plantas. Assim, é necessário que sejam aplicados inoculantes em altas concentrações para que tal função seja efetiva (KISHORE et al, 2015). Tais microrganismos também estão presentes em adubos orgânicos, como esterco bovino, utilizado no presente estudo, fato que poderia mascarar os resultados.…”

Section: Resultados E Discussõesunclassified

Interação entre isolados de rizóbios e genótipos de tomateiro (Solanum lycopersicum)

Santos

Huff

Rosa

et al. 2017

R. Eletr. Cient. da Uergs

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Com o melhoramento vegetal, as plantas de tomateiro (Solanum lycopersicum) são selecionadas com vistas a expressar o máximo do seu rendimento, tornando-se mais exigentes em fertilizantes e agrotóxicos. Na busca por sistemas mais sustentáveis de produção, necessita-se entender melhor as interações entre plantas e microrganismos promotores de crescimento. Estes podem ser utilizados como insumos biológicos, no entanto, sua eficiência pode depender da interação entre os genótipos dos organismos envolvidos. Dentre os microrganismos promotores de crescimento, estão os rizóbios, que realizam a fixação biológica de nitrogênio quando associados simbioticamente com leguminosas, que também podem estimular o crescimento de outras famílias botânicas por outros mecanismos. Assim, o objetivo desta pesquisa foi avaliar a produção de diferentes genótipos de tomateiros quando inoculados com quatro isolados de rizóbios. Foi realizado um experimento a campo, bifatorial, com delineamento experimental em blocos casualizados, com três repetições. Cada bloco continha 15 unidades experimentais com oito plantas inoculadas com meio de cultura contendo rizóbios. Foram utilizadas duas variedades crioulas e uma cultivar híbrida, inoculadas com os isolados UFRGS-VP16, UFRGS-Lc336, UFRGS-Lc348 e SEMIA-3007. Os frutos foram colhidos no começo da maturação, pesados e medidos. Os dados foram submetidos à análise de variância e teste Dunnett. As cultivares Cereja e Rosa, ambas crioulas, tiveram aumento de produção com a inoculação com rizóbios, enquanto a variedade Serato, híbrida, não obteve incremento de produção com essa prática.

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Phosphate-Solubilizing Microorganisms: A Critical Review

Cited by 32 publications

References 118 publications

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Phosphate-Solubilizing Microorganisms: Mechanism and Their Role in Phosphate Solubilization and Uptake

Soil Microbial Resources for Improving Fertilizers Efficiency in an Integrated Plant Nutrient Management System

Interação entre isolados de rizóbios e genótipos de tomateiro (Solanum lycopersicum)

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