Endophytic Fungi: Role in Phosphate Solubilization

Mehta, Preeti; Sharma, R. L.; Putatunda, Chayanika; Walia, Abhishek

doi:10.1007/978-3-030-03589-1_9

Cited by 42 publications

(27 citation statements)

References 130 publications

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“…There is not much evidence of significant organic phosphorus solubilization through lyases, as their activity is low because of the low availability of their substrates in the soil (Selvapandiyan and Bhatnagar 1994). CP lyases' activity is reported in many phosphatesolubilizing bacteria like Bacillus, Pseudomonas, Enterobacter, Acinetobacter, Rhizobium, and Burkholderia (Teng et al 2019a;Vazquez et al 2000) and in endophytic fungi like Aspergillus, Penicillium, Piriformospora, and Curvularia (Mehta et al 2019).…”

Section: Phosphonatases/carbon-phosphorus (C-p) Lyasesmentioning

confidence: 99%

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

Rawat

Das

Shankhdhar

et al. 2020

J Soil Sci Plant Nutr

280

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: Phosphonatases/carbon-phosphorus (C-p) Lyasesmentioning

confidence: 99%

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

Rawat

Das

Shankhdhar

et al. 2020

J Soil Sci Plant Nutr

280

130

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“…The H 2 S released by PSB when reacts with ferric phosphate make ferrous sulphate with concurrent discharge of phosphate ion. Moreover, phytohormones such as indole acetic acid (Chaiharn and Lumyong 2011), gibberellins and cytokinins (Mehta et al 2019) produced by PSB are also positively correlated with phosphate solubilization.…”

mentioning

confidence: 99%

Integration of poultry manure and phosphate solubilizing bacteria improved availability of Ca bound P in calcareous soils

et al. 2019

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A laboratory incubation experiment was executed to examine the role of phosphate solubilizing bacteria (with PSB and without PSB) and poultry manure (4, 8 and 12 t PM ha −1) in improving P mobilization/mineralization under four different lime regimes (4.78, 10, 15 and 20% CaCO 3 M/M) for 56 days using three factorial complete randomized design (CRD) with triplicates. Phosphorus availability progressively increased over time irrespective of PSB inoculation, PM and lime levels. The PSB and PM (4-12 t ha −1) addition into soil significantly increased Olsen P at all incubation intervals. Post incubation PSB survival increased by 12 and 9% with inoculation and 12 t PM ha −1 over control and 4 t PM ha −1 , respectively. Liming ominously reduced P mobilization/mineralization by 1.3, 2.6 and 10.5% and PSB population by 6.6, 7.3 and 16.3% at 10, 15 and 20% (lime), respectively, over control at day 56. However, PSB and PM addition (with increasing rate) into soil significantly counterbalanced these ill effects of lime. Thus, the application of PSB and PM is a promising measure to enhance P availability in calcareous soils and shall be practiced.

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“…T. harzanium (DBF81) is known to be involved in mineral solubilization ( Altomare et al, 1999 ; Rawat and Tewari, 2011 ; Tallapragada and Gudimi, 2011 ; Bader et al, 2020 ) through various mechanisms, including solubilization via acidification, redox reactions, chelation and hydrolysis ( Li et al, 2015 ). According to several authors, the main mechanism by which fungal endophytes solubilize phosphate and other minerals is the production of organic acids that lowers the pH of the soil, consequently causing the solubilization of insoluble minerals ( Chhabra and Dowling, 2017 ; Adhikari and Pandey, 2019 ; Mehta et al, 2019 ). All of the tested fungal strains, except DBF79, reduced the pH of their media.…”

Section: Discussionmentioning

confidence: 99%

Natural Fungal Endophytes From Noccaea caerulescens Mediate Neutral to Positive Effects on Plant Biomass, Mineral Nutrition and Zn Phytoextraction

et al. 2021

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Phytoextraction using hyperaccumulating plants is a method for the remediation of soils contaminated with trace elements (TEs). As a strategy for improvement, the concept of fungal-assisted phytoextraction has emerged in the last decade. However, the role played by fungal endophytes of hyperaccumulating plants in phytoextraction is poorly studied. Here, fungal endophytes isolated from calamine or non-metalliferous populations of the Cd/Zn hyperaccumulator Noccaea caerulescens were tested for their growth promotion abilities affecting the host plant. Plants were inoculated with seven different isolates and grown for 2 months in trace element (TE)-contaminated soil. The outcomes of the interactions between N. caerulescens and its native strains ranged from neutral to beneficial. Among the strains, Alternaria thlaspis and Metapochonia rubescens, respectively, isolated from the roots of a non-metallicolous and a calamine population of N. caerulescens, respectively, exhibited the most promising abilities to enhance the Zn phytoextraction potential of N. caerulescens related to a significant increase of the plant biomass. These strains significantly increased the root elemental composition, particularly in the case of K, P, and S, suggesting an improvement of the plant nutrition. Results obtained in this study provide new insights into the relevance of microbial-assisted phytoextraction approaches in the case of hyperaccumulating plants.

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Endophytic Fungi: Role in Phosphate Solubilization

Cited by 42 publications

References 130 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

Integration of poultry manure and phosphate solubilizing bacteria improved availability of Ca bound P in calcareous soils

Natural Fungal Endophytes From Noccaea caerulescens Mediate Neutral to Positive Effects on Plant Biomass, Mineral Nutrition and Zn Phytoextraction

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