Potassium-Solubilizing Microorganisms (KSMs) and Its Effect on Plant Growth Improvement

Sindhu, S. S.; Parmar, Priyanka; Phour, Manisha; Sehrawat, Anju

doi:10.1007/978-81-322-2776-2_13

Cited by 92 publications

(15 citation statements)

References 65 publications

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“…If not supplied in adequate quantity, the plants will grow slowly, have poorly developed roots, and produce small seeds and low yields [89,90]. It has been reported that a wide range of bacterial and fungal strains use various mechanisms, including the production of acids, chelation, acidolysis, complexolysis, and exchange reactions to solubilize the insoluble K into soluble forms [18,91,92]. Examples of potassium-solubilizing biofertilizer include Bacillus spp.…”

Section: Potassium Solubilizing and Mobilizing Biofertilizersmentioning

confidence: 99%

Microbes as Biofertilizers, a Potential Approach for Sustainable Crop Production

2021

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Continuous decline of earth’s natural resources and increased use of hazardous chemical fertilizers pose a great concern for the future of agriculture. Biofertilizers are a promising alternative to hazardous chemical fertilizers and are gaining importance for attaining sustainable agriculture. Biofertilizers play a key role in increasing crop yield and maintaining long-term soil fertility, which is essential for meeting global food demand. Microbes can interact with the crop plants and enhance their immunity, growth, and development. Nitrogen, phosphorous, potassium, zinc, and silica are the essential nutrients required for the proper growth of crops, but these nutrients are naturally present in insolubilized or complex forms. Certain microorganisms render them soluble and make them available to the plants. The potential microbes, their mode of action, along with their effect on crops, are discussed in this review. Biofertilizers, being cost effective, non-toxic, and eco-friendly, serve as a good substitute for expensive and harmful chemical fertilizers. The knowledge gained from this review can help us to understand the importance of microbes in agriculture and the ways to formulate these microbes as biofertilizers for sustainable crop production.

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Section: Potassium Solubilizing and Mobilizing Biofertilizersmentioning

confidence: 99%

Microbes as Biofertilizers, a Potential Approach for Sustainable Crop Production

2021

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“…Certain bacteria such as Azospirillum, Bacillus, Burkholderia, Erwinia, Pseudomonas, Rhizobium, or Serratiaare have been reported as phosphate solubilizing bacteria which helps in increasing the biological nitrogen fixation efficiency, improve the availability of Fe and Zn, and alter the growth of roots or shoots by production of plant hormones (Kucey et al, 1989;Mehnaz and Lazarovits, 2006). Potassium-solubilizing bacteria/fungi have been isolated from rhizosphere soil of different crops, which cause solubilization of potassium by the production of organic/inorganic acids or polysaccharides (Sindhu et al, 2016). PGPR plays a vital role in plant growth and development under stressful conditions through different mechanisms like fixation of nitrogen, solubilization of phosphorus, zinc solubilization, siderophores production, growth regulators, organic acids, enzymes like ACC-deaminase, chitinase, and glucanase (Glick et al, 2007;Berg, 2009;Hayat et al, 2010;Kamran et al, 2017).…”

Section: Plant Growth-promoting Rhizobacteria (Pgpr)mentioning

confidence: 99%

Plant-Microbe Interactions in Alleviating Abiotic Stress—A Mini Review

Michael

2021

Front. Agron.

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Crop plants are continuously exposed to various abiotic stresses like drought, salinity, ultraviolet radiation, low and high temperatures, flooding, metal toxicities, nutrient deficiencies which act as limiting factors that hampers plant growth and low agricultural productivity. Climate change and intensive agricultural practices has further aggravated the impact of abiotic stresses leading to a substantial crop loss worldwide. Crop plants have to get acclimatized to various environmental abiotic stress factors. Though genetic engineering is applied to improve plants tolerance to abiotic stresses, these are long-term strategies, and many countries have not accepted them worldwide. Therefore, use of microbes can be an economical and ecofriendly tool to avoid the shortcomings of other strategies. The microbial community in close proximity to the plant roots is so diverse in nature and can play an important role in mitigating the abiotic stresses. Plant-associated microorganisms, such as endophytes, arbuscular mycorrhizal fungi (AMF), and plant growth-promoting rhizobacteria (PGPR), are well-documented for their role in promoting crop productivity and providing stress tolerance. This mini review highlights and discusses the current knowledge on the role of various microbes and it's tolerance mechanisms which helps the crop plants to mitigate and tolerate varied abiotic stresses.

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“…Soils affected by plants had much greater K extractability than barren soils, except for E. vulgare, R. acetosa, and E. cannabinum. The mechanism of K solubilisation in the root zone of several plants is not clear; however, recent studies have documented isolation of K-solubilising bacteria both from K minerals and rhizosphere of cropped plants [7].…”

Section: Soil Chemical Characteristicsmentioning

confidence: 99%

Activity and Diversity of Microorganisms in Root Zone of Plant Species Spontaneously Inhabiting Smelter Waste Piles

Siebielec

Sugier

et al. 2020

Molecules

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The aim was to assess plant driven changes in the activity and diversity of microorganisms in the top layer of the zinc and lead smelter waste piles. The study sites comprised two types (flotation waste—FW and slag waste—SW) of smelter waste deposits in Piekary Slaskie, Poland. Cadmium, zinc, lead, and arsenic contents in these technosols were extremely high. The root zone of 8 spontaneous plant species (FW—Thymus serpyllum, Silene vulgaris, Solidago virgaurea, Echium vulgare, and Rumex acetosa; and SW—Verbascum thapsus; Solidago gigantea, Eupatorium cannabinum) and barren areas of each waste deposit were sampled. We observed a significant difference in microbial characteristics attributed to different plant species. The enzymatic activity was mostly driven by plant-microbial interactions and it was significantly greater in soil affected by plants than in bulk soil. Furthermore, as it was revealed by BIOLOG Ecoplate analysis, microorganisms inhabiting barren areas of the waste piles rely on significantly different sources of carbon than those found in the zone affected by spontaneous plants. Among phyla, Actinobacteriota were the most abundant, contributing to at least 25% of the total abundance. Bacteria belonging to Blastococcus genera were the most abundant with the substantial contribution of Nocardioides and Pseudonocardia, especially in the root zone. The contribution of unclassified bacteria was high—up to 38% of the total abundance. This demonstrates the unique character of bacterial communities in the smelter waste.

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Potassium-Solubilizing Microorganisms (KSMs) and Its Effect on Plant Growth Improvement

Cited by 92 publications

References 65 publications

Microbes as Biofertilizers, a Potential Approach for Sustainable Crop Production

Microbes as Biofertilizers, a Potential Approach for Sustainable Crop Production

Plant-Microbe Interactions in Alleviating Abiotic Stress—A Mini Review

Activity and Diversity of Microorganisms in Root Zone of Plant Species Spontaneously Inhabiting Smelter Waste Piles

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