Molecular Characterization of Potassium Solubilizing Bacteria from Crop Rhizosphere of the North Eastern Region of India

Buragohain, Smrita; Nath, Dhruba Jyoti; Devi, Yumnam Bijilaxmi; Bhattacharyya, Badal; Dutta, S. K.

doi:10.18520/cs/v114/i12/2543-2548

Cited by 10 publications

(7 citation statements)

References 13 publications

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“…The soil pH was significantly reduced to 7.7 as a result of KSB inoculation, especially in the treatments that contained potassium sulfate alone or mixed with K-feldspar. Several previous researchers have confirmed the ability of B. cereus to produce organic acids and reduce the soil pH [16,[42][43][44]. According to the results of our study, the soil pH in the treatments inoculated with the bio-fertilizer was lower than that of the non-inoculated ones.…”

Section: Soil Qualitysupporting

confidence: 81%

“…Chen et al [43] studied the activity of potassium solubilizing bacteria (B. aryabhattai SK1-7) in fermentation and pot experiments, and they found that the pH of the growth media declined from 7.2 to 4.3 within the first day, while the soil pH in the pot experiments was decreased by 0.28 units after 100 days of inoculation. The decreases in the soil pH as a result of inoculation with KSB was also reported by Buragohain et al [44]. The indirect effect of the biofertilizer was through increasing the plant growth as a result of stimulating hormones produced from the inoculated biofertilizer [45,46].…”

Section: Soil Qualitysupporting

confidence: 72%

“…The improvement of soil quality was likely due to the reduction in soil pH as a result of the activity of Bacillus cereus. KSB has been previously shown to produce organic acids and other chemicals which may reduce soil pH [16,42,44]. The initial soil pH in the current study before cultivation was 8.0.…”

Section: Soil Qualitymentioning

confidence: 66%

“…Bacillus cereus can dissolve potassium from K-feldspar minerals by producing organic acids that increase the K release from the mineral [16,40]. Several studies have confirmed that potassium solubilizing bacteria are able to produce organic acids such as tartaric, citric, and oxalic acids [16,[41][42][43][44].…”

Section: Kinetics Of K Releasementioning

confidence: 99%

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Potassium Source and Biofertilizer Influence K Release and Fruit Yield of Mango (Mangifera indica L.): A Three-Year Field Study in Sandy Soils

et al. 2022

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Arid degraded soils have a coarse texture and poor organic matter content, which reduces the activity of microorganisms and soil enzymes, and thus the soil quality, plant yield and quality decrease. Potassium solubilizing bacteria (KSB) have been suggested to increase the activity of soil enzymes and increase the release of potassium from natural K-feldspar in the arid degraded soil, and thus potentially reduce the rates of the application of chemical fertilizers. Field studies were conducted for three successive growing seasons in an organic farming system to investigate the effects of K-feldspar and KSB (Bacillus cereus) on K release, soil fertility, and fruit yield of mango plants (Mangifera indica L.). The maximum growth of mango plants was found in the treatments inoculated with KSB. KSB increased soil available N, P, K, and the activity of dehydrogenase and alkaline phosphatase enzymes by 10, 7, 18, 54, and 52%, respectively. KSB increased the fruit yield of mango by 23, 27, and 23% in the first, second, and third growing seasons, respectively. The partial (up to 50%) substitution of chemical K-fertilizer with K-feldspar gave fruit yield and quality very close to that fertilized with the full chemical K-fertilizer. The release rate of K (over all the treatments) varied between 0.18 and 0.64 mg kg−1 of soil per day. KSB significantly increased the K release rate. The application of chemical K-fertilizer gave the highest K release, while substitution with K-feldspar reduced the release of K. Natural K-feldspar contains 8.2% K but is poorly soluble when applied alone. KSB increased the soil quality parameters and enhanced the growth and quality of mango fruit. The fruit yield of mango, under KSB inoculation and fertilization with different K sources, ranged between 9.14 to 17.14 t ha−1. The replacement of 50% of chemical K-fertilizer with natural K-feldspar caused a decrease in the fruit yield by 17, 8, and 2.7% in the first, second, and third years, respectively. The substitution of chemical K-fertilizer with K-feldspar up to 50% with KSB is a good strategy to reduce the excessive use of chemical K-fertilizer. B. cereus and natural K-feldspar have the potential to improve soil health and mango plant productivity in low fertile arid soils.

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Section: Soil Qualitysupporting

confidence: 81%

Section: Soil Qualitysupporting

confidence: 72%

Section: Soil Qualitymentioning

confidence: 66%

Section: Kinetics Of K Releasementioning

confidence: 99%

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Potassium Source and Biofertilizer Influence K Release and Fruit Yield of Mango (Mangifera indica L.): A Three-Year Field Study in Sandy Soils

et al. 2022

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“…Also fluctuation in soil pH is critical to soil potassium kinetics and release from their respective sources by microbes including bacteria (Ahmad et al, 2016;Shrivastava et al, 2016;Estesami 2017;Masood and Bano, 2017;Sattar et al, 2019;Kour et al, 2020). According to Chen et al (2020), pH decline to 3.3 resulted in approximately 32.6% increase in the concentration of soil potassium and this is affirmed by the study of Buragohain et al (2018).…”

Section: Factors That Affect the Solubilization Of Potassium By Potas...mentioning

confidence: 97%

The use of soil microbial potassium solubilizers in potassium nutrient availability in soil and its dynamics

et al. 2022

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Background An increase in population has led to a higher demand for food. Meeting up this demand has necessitated the use of chemical fertilizers. However, utilization of these fertilizers has a considerable deleterious effect on the soil, plant, human, environmental sustainability, and only increase the cost and reduced profitability. With these identified problems, there is a need for efficient and sustainable methods regarding managing natural resources to enhance food production. Naturally, potassium (K) is an abundant element present in the soil but in an inaccessible form. There is therefore a need to seek an alternative method to improve the K availability to plants noting that K is an essential plant nutrient that plays a major role in plant physiological and metabolic processes. Subsequently, employing microbial potassium solubilizers is an efficient method to enhance the potassium availability in the soil, which in turn improves productivity. Therefore, this review discusses the various types of potassium solubilizing microorganisms in soil, their mechanism of action, and their importance in sustainable crop production. Main body Potassium solubilizing microorganisms (KSM) such as bacteria and fungi can solubilize K from an insoluble form to a soluble form to enhance uptake by plants. These microorganisms solubilize K through the production of organic acids such as tartaric acid, citric acid, and oxalic acid to release K from its minerals. Apart from making potassium available, these microbes can improve soil health and crop yield and act as bio-control agents by producing antibiotics. Potassium solubilizing microbes also produce hormones that help plants withstand both biotic and abiotic stresses. Hence, the application of KSM to agricultural soils will reduce the use of chemical fertilizers and enhance the sustainability of food production. Conclusion One of the most efficient ways of improving plant utilization of potassium in the soil is to use potassium solubilizing microbes, which can make potassium ions available from minerals of both igneous and sedimentary origins. The use of potassium solubilizing microbes as biofertilizers may be the awaited solution to increasing crop productivity, concerns linked to chemical fertilizer application, and earth resource diminution.

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Isolation and screening of potassium solubilizing bacteria from saxicolous habitat and their impact on tomato growth in different soil types

Muthuraja

Muthukumar

2021

Arch Microbiol

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Molecular Characterization of Potassium Solubilizing Bacteria from Crop Rhizosphere of the North Eastern Region of India

Cited by 10 publications

References 13 publications

Potassium Source and Biofertilizer Influence K Release and Fruit Yield of Mango (Mangifera indica L.): A Three-Year Field Study in Sandy Soils

Potassium Source and Biofertilizer Influence K Release and Fruit Yield of Mango (Mangifera indica L.): A Three-Year Field Study in Sandy Soils

The use of soil microbial potassium solubilizers in potassium nutrient availability in soil and its dynamics

Isolation and screening of potassium solubilizing bacteria from saxicolous habitat and their impact on tomato growth in different soil types

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