Silicate Solubilization and Plant Growth Promoting Potential of Rhizobium Sp. Isolated from Rice Rhizosphere

Chandrakala, C.; Voleti, S. R.; Bandeppa, Sonth; Kumar, Narasimha; Latha, P.

doi:10.1007/s12633-019-0079-2

Cited by 47 publications

(43 citation statements)

References 42 publications

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“…(NBRIVS7) is also identified among the predominant Si solubilizers Bacillus and Pseudomonas spp., which is not yet reported earlier for this function. Our findings also report some new Bacillus and Pseudomonas species other than those reported earlier for silicon solubilization (Vasanthi et al, 2018;Chandrakala et al, 2019;Lee et al, 2019). PCA analysis yield insights into the correlation of different Si solubilizers with organic acid production, results from the biplot graph also suggests the principal role of organic acids, especially fumaric and succinic (Figure 4), in Si solubilization as reported earlier (Sheng et al, 2008;Vasanthi et al, 2018).…”

Section: Discussionsupporting

confidence: 86%

“…Solubilization of both insoluble silicon and phosphate due to organic acid production by microbes is known to enhance their availability to plants (Ameen et al, 2019). Various studies have reported weathering of silicates by bacteria for its dissolution to make it available to the plants (Chandrakala et al, 2019). Different groups have developed the liquid screening media containing different silicon sources viz.…”

Section: Introductionmentioning

confidence: 99%

“…feldspar, muscovite, biotite, and magnesium trisilicate with soluble phosphate sources (di-potassium hydrogen phosphate; K 2 HPO 4 and di-sodium hydrogen phosphate; Na 2 HPO 4 ); and agar based media containing glucose and magnesium trisilicate as sole source of nutrition (Sheng et al, 2008;Kang et al, 2017;Vasanthi et al, 2018). Number of bacterial strains of genus Bacillus, Pseudomonas, Proteus, Rhizobia, Burkholderia, and Enterobacter are known to release silicon from silicates and promote plant growth (Meena et al, 2014a;Wang et al, 2015;Kang et al, 2017;Kumawat et al, 2017;Chandrakala et al, 2019;Lee et al, 2019). However, due to the common mechanism of solubilization (organic acid production) and quantification method (molybdenum blue method) for both phosphate (P, Fiske and Subbarow, 1925) and silicon (Si, Elliott and Synder, 1991) there is unavailability of a concrete siliconsolubilizing media.…”

Section: Introductionmentioning

confidence: 99%

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Silicon-Solubilizing Media and Its Implication for Characterization of Bacteria to Mitigate Biotic Stress

et al. 2020

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Silicon (Si), the second most abundant element on earth, remains unavailable for plants' uptake due to its poor solubility. Microbial interventions to convert it in soluble forms are well documented. However, studies on discrimination of Si and P solubilizing microbes due to common estimation method and sharing of solubilization mechanism are still obscure. A defined differential media, i.e. silicon-solubilizing media (NBRISSM) is developed to screen Si solubilizers. NBRISN13 (Bacillus amyloliquefaciens), a Si solubilizer, exhibiting antagonistic property against Rhizoctonia solani, was further validated for disease resistance. The key finding of the work is that NBRISSM is a novel differential media for screening Si solubilizers, distinct from P solubilizers. Dominance of Pseudomonas and Bacillus spp. for the function of Si solubilization was observed during diversity analysis of Si solubilizers isolated from different rhizospheres. Sphingobacterium sp., a different strain has been identified for silicon solubilization other than Pseudomonas and Bacillus sp. Role of acidic phosphatase during Si solubilization has been firstly reported in our study in addition to other pH dependent phenomenon. Study also showed the combinatorial effect of feldspar and NBRISN13 on elicited immune response through (i) increased Si uptake, (ii) reduced disease severity, (iii) modulation of cell wall degrading and antioxidative enzyme activities, and (iv) induced defense responsive gene expression.

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Section: Discussionsupporting

confidence: 86%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Silicon-Solubilizing Media and Its Implication for Characterization of Bacteria to Mitigate Biotic Stress

et al. 2020

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“…Application of PGPBs such as Azospirillum, Azotobacter, Pseudomonas, and Bacillus species improved the alkaloid contents in two medicinal plants W. somnifera and H. niger under limited water conditions [62,63]. With regards to the endosymbiotic PGPBs, Chandrakala et al screened and isolated one Rhizobium species from rice rhizosphere, which could solubilize silicate and promote plant growth potential of the rice plants [160]. B. japonicum has been shown to help soybean to resist a high content of As in the soil [161], whereas S. fredii could effectively nodulate numerous different legumes, thereby promoting growth of the host plants [162].…”

Section: Applications Of Individual Microbes For Improvement Of Crop mentioning

confidence: 99%

“…Rhizobium spp. promoted the growth of rice seedlings and solubilized silicate; [160] Bradyrhizobium japonicum helped soybean in resisting arsenic contamination in soil [161] Frankia casuarinae CcI3 formed nodules and promoted the growth of Casuarina equisetifolia [163] Table 1. Cont.…”

Section: Research Aspects Microbes/ Microbiomes Beneficial Traits Refmentioning

confidence: 99%

Research Advances of Beneficial Microbiota Associated with Crop Plants

Tian

Lin

Tian

et al. 2020

IJMS

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Plants are associated with hundreds of thousands of microbes that are present outside on the surfaces or colonizing inside plant organs, such as leaves and roots. Plant-associated microbiota plays a vital role in regulating various biological processes and affects a wide range of traits involved in plant growth and development, as well as plant responses to adverse environmental conditions. An increasing number of studies have illustrated the important role of microbiota in crop plant growth and environmental stress resistance, which overall assists agricultural sustainability. Beneficial bacteria and fungi have been isolated and applied, which show potential applications in the improvement of agricultural technologies, as well as plant growth promotion and stress resistance, which all lead to enhanced crop yields. The symbioses of arbuscular mycorrhizal fungi, rhizobia and Frankia species with their host plants have been intensively studied to provide mechanistic insights into the mutual beneficial relationship of plant–microbe interactions. With the advances in second generation sequencing and omic technologies, a number of important mechanisms underlying plant–microbe interactions have been unraveled. However, the associations of microbes with their host plants are more complicated than expected, and many questions remain without proper answers. These include the influence of microbiota on the allelochemical effect caused by one plant upon another via the production of chemical compounds, or how the monoculture of crops influences their rhizosphere microbial community and diversity, which in turn affects the crop growth and responses to environmental stresses. In this review, first, we systematically illustrate the impacts of beneficial microbiota, particularly beneficial bacteria and fungi on crop plant growth and development and, then, discuss the correlations between the beneficial microbiota and their host plants. Finally, we provide some perspectives for future studies on plant–microbe interactions.

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