Exploration of silicate solubilizing bacteria for sustainable agriculture and silicon biogeochemical cycle

Raturi, Gaurav; Sharma, Yogesh; Rana, Varnika; Thakral, Vandana; Myaka, Balaraju; Salvi, Prafull; Singh, Manish Kumar; Dhar, Hena; Deshmukh, Rupesh

doi:10.1016/j.plaphy.2021.06.039

Cited by 55 publications

(16 citation statements)

References 101 publications

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“…Several other studies have also reported the bacteria-associated weathering of silicate-mineral and release of silica. Soil rhizosphere is considered a rich source of silica formation where bacterial activities are high due to a large number of organic acids, polysaccharides, hydroxyl ions, organic ligands, and enzyme production [96,97]. Rice soil rhizosphere is considered an ideal condition for isolation of SSB [98,99].…”

Section: Rhizobiamentioning

confidence: 99%

“…1. During metabolism, silicon-solubilizing bacteria release a large number of organic acids, polysaccharides, hydroxyl ions, organic ligands, and enzymes that further aid in the silicate weathering process [96,97]. During this process, organic acids (keto acids, oxalic acid, citric acid, and carbolic acid) are produced that combine with different type of cations and become readily available to plant by stimulating the hydrolysis and supplying H + ions to the medium [152,153].…”

Section: Mechanisms Of Si Solubilization By Si Solubilizing Bacteriamentioning

confidence: 99%

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Impact of Silicon on Plant Nutrition and Significance of Silicon Mobilizing Bacteria in Agronomic Practices

Raza

Abbas

Amna

et al. 2023

Silicon

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Globally, rejuvenation of soil health is a major concern due to the continuous loss of soil fertility and productivity. Soil degradation decreases crop yields and threatens global food security. Improper use of chemical fertilizers coupled with intensive cultivation further reduces both soil health and crop yields. Plants require several nutrients in varying ratios that are essential for the plant to complete a healthy growth and development cycle. Soil, water, and air are the sources of these essential macro- and micro-nutrients needed to complete plant vegetative and reproductive cycles. Among the essential macro-nutrients, nitrogen (N) plays a significant in non-legume species and without sufficient plant access to N lower yields result. While silicon (Si) is the 2nd most abundant element in the Earth’s crust and is the backbone of soil silicate minerals, it is an essential micro-nutrient for some plants. Silicon is just beginning to be recognized as an important micronutrient to some plant species and, while it is quite abundant, Si is often not readily available for plant uptake. The manufacturing cost of synthetic silica-based fertilizers is high, while absorption of silica is quite slow in soil for many plants. Rhizosphere biological weathering processes includes microbial solubilization processes that increase the dissolution of minerals and increases Si availability for plant uptake. Therefore, an important strategy to improve plant silicon uptake could be field application of Si-solubilizing bacteria. In this review, we evaluate the role of Si in seed germination, growth, and morphological development and crop yield under various biotic and abiotic stresses, different pools and fluxes of silicon (Si) in soil, and the bacterial genera of the silicon solubilizing microorganisms. We also elaborate on the detailed mechanisms of Si-solubilizing/mobilizing bacteria involved in silicate dissolution and uptake by a plant in soil. Last, we discuss the potential of silicon and silicon solubilizing/mobilizing to achieve environmentally friendly and sustainable crop production.

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Section: Rhizobiamentioning

confidence: 99%

Section: Mechanisms Of Si Solubilization By Si Solubilizing Bacteriamentioning

confidence: 99%

Impact of Silicon on Plant Nutrition and Significance of Silicon Mobilizing Bacteria in Agronomic Practices

Raza

Abbas

Amna

et al. 2023

Silicon

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“…Most of the silicate solubilizing bacteria (SSBs) belong to Bacillus, Pseudomonas, Proteus, Enterobacter etc. (Raturi et al, 2021). Up to now several SSBs belongs to diverse genera have been isolated and characterised (Fig.…”

Section: Fig 3 Cultural Characteristics Of Colonies Of Silicatementioning

confidence: 99%

Review Article Silicate Bacteria as a Biofertilizer

Afify

2022

Journal of Agricultural Chemistry and Biotechnology

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The present article reveals that silicate solubilizing microbes are essential part of weathering silicate minerals. Alumino-silicate group appears the most minerals to weathering by several bacteria. The contribution of biological agents in weathering has attracted increased interests as several genera of microorganisms, therefore referred as ''silicate bacteria'' were found to decompose aluminosilicate minerals to increase potassium, silicon and aluminum in an available forms for plant nutrition.Thus, the magnitude of the role of such bacteria in the decomposition of alumino-silicates and releasing the elements contained therein as well as in the elements uptake by plants was found of great interest . The article concluded that effect of silicate bacteria in minerals weathering, soil formation, elements cycling and plant nutrition. Therefore, the speculate that the classic weathering sequence is not just chemical weathering. But should be interpreted as a mixture of chemical and biochemical weathering.

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“…Siderophores which are chelators with a small molecular weight having a high affinity for divalent and trivalent metals. Siderophores are also thought to have a role in silicate solubilization in acidic media [ 34 , 35 ]. (ii) Enzyme-based mechanism.…”

Section: Introductionmentioning

confidence: 99%

Mycosynthesis of Silica Nanoparticles Using Aspergillus niger: Control of Alternaria solani Causing Early Blight Disease, Induction of Innate Immunity and Reducing of Oxidative Stress in Eggplant

et al. 2022

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The threats to the life and production of crops are exacerbated by climate change and the misuse of chemical pesticides. This study was designed to evaluate the effectiveness of biosynthesized silica nanoparticles (SiO2-NPs) as an alternative to pesticides against early blight disease of eggplant. Antifungal activity, disease index, photosynthetic pigments, osmolytes, oxidative stress, antioxidant enzymes activities were tested for potential tolerance of eggplant infected with Alternaria solani. Silica nanoparticles were successfully biosynthesized using Aspergillus niger through green and ecofriendly method. Results revealed that SiO2-NPs exhibited promising antifungal activity against A. solani where MIC was 62.5 µg/mL, and inhibition growth at concentration 1000 µg/mL recorded 87.8%. The disease Index (DI) as a result of infection with A. solani reached 82.5%, and as a result, a severe decrease in stem and root length and number of leaves occurred, which led to a sharp decrease in the photosynthetic pigments. However, contents of free proline, total phenol and antioxidant enzymes activity were increased in infected plants. On the other hand, the treatment with SiO2-NPs 100 ppm led to a great reduction in the disease Index (DI) by 25% and a high protection rate by 69.69%. A clear improvement in growth characteristics and a high content of chlorophyll and total carotenoids was also observed in the plants as a result of treatment with silica nanoparticles in (healthy and infected) plants. Interestingly, the noticeable rise in the content of infected and healthy plants of proline and phenols and an increase in the activity of super oxide dismutase (SOD) and polyphenol oxidase (PPO). It could be suggested that foliar application of SiO2-NPs especially 100 ppm could be commercially used as antifungal and strong inducer of plant physiological immunity against early blight disease.

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Exploration of silicate solubilizing bacteria for sustainable agriculture and silicon biogeochemical cycle

Cited by 55 publications

References 101 publications

Impact of Silicon on Plant Nutrition and Significance of Silicon Mobilizing Bacteria in Agronomic Practices

Impact of Silicon on Plant Nutrition and Significance of Silicon Mobilizing Bacteria in Agronomic Practices

Review Article Silicate Bacteria as a Biofertilizer

Mycosynthesis of Silica Nanoparticles Using Aspergillus niger: Control of Alternaria solani Causing Early Blight Disease, Induction of Innate Immunity and Reducing of Oxidative Stress in Eggplant

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