Potassium-Solubilizing Microorganisms and Their Role in Enhancing Soil Fertility and Health

Das, Ipsita; Pradhan, Madhusmita

doi:10.1007/978-81-322-2776-2_20

Cited by 85 publications

(12 citation statements)

References 52 publications

(54 reference statements)

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“…In addition, the associated soil nutrients (e.g., amount of C, N, and 10.3389/fmicb.2023.1066805 K) can change under biotic and abiotic environmental disturbances (Bastida et al, 2006;Otlewska et al, 2020;Crandall et al, 2022). Potassium-solubilizing microorganisms, widely present in different soil environments, can be used as biofertilizers to make available K from minerals and rocks, ultimately influencing soil nutrients, crop growth and quality (Das and Pradhan, 2016). The differential microorganisms in the rhizosphere of P. yunnanensis may disturb the balance of plant available nutrients in the soil and eventually lead to differences in the available P of different trunk types of P. yunnanensis.…”

Section: Discussionmentioning

confidence: 99%

Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

Gan

et al. 2023

Front. Microbiol.

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BackgroundPinus yunnanensis is a major silvicultural species in Southwest China. Currently, large areas of twisted-trunk Pinus yunnanensis stands severely restrict its productivity. Different categories of rhizosphere microbes evolve alongside plants and environments and play an important role in the growth and ecological fitness of their host plant. However, the diversity and structure of the rhizosphere microbial communities between P. yunnanensis with two different trunk types—straight and twisted—remain unclear.MethodsWe collected the rhizosphere soil of 5 trees with the straight and 5 trees with the twisted trunk type in each of three sites in Yunnan province. We assessed and compared the diversity and structure of the rhizosphere microbial communities between P. yunnanensis with two different trunk types by Illumina sequencing of 16S rRNA genes and internal transcribed spacer (ITS) regions.ResultsThe available phosphorus in soil differed significantly between P. yunnanensis with straight and twisted trunks. Available potassium had a significant effect on fungi. Chloroflexi dominated the rhizosphere soils of the straight trunk type, while Proteobacteria was predominant in the rhizosphere soils of the twisted trunk type. Trunk types significantly explained 6.79% of the variance in bacterial communities.ConclusionThis study revealed the composition and diversity of bacterial and fungal groups in the rhizosphere soil of P. yunnanensis with straight and twisted trunk types, providing proper microbial information for different plant phenotypes.

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Section: Discussionmentioning

confidence: 99%

Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

Gan

et al. 2023

Front. Microbiol.

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“…In several cases, they can also be intimately associated with a large number of agricultural crops, such as potatoes, tomatoes, wheat, and radish [74]. The solubilization of inorganic phosphorus has been documented to occur as a result of the action of low molecular weight organic acids synthesized by the various soil bacteria strains [176]. With regard to organic phosphorus, on the other hand, mineralization occurs following the synthesis of various phosphatases by bacteria, which catalyze the hydrolysis of phosphoric esters [89].…”

Section: Phosphate Solubilizationmentioning

confidence: 99%

Plant-Microbe Interaction in Sustainable Agriculture: The Factors That May Influence the Efficacy of PGPM Application

Malgioglio

Rizzo

Nigro³

et al. 2022

Sustainability

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The indiscriminate use of chemical fertilizers and pesticides has caused considerable environmental damage over the years. However, the growing demand for food in the coming years and decades requires the use of increasingly productive and efficient agriculture. Several studies carried out in recent years have shown how the application of plant growth-promoting microbes (PGPMs) can be a valid substitute for chemical industry products and represent a valid eco-friendly alternative. However, because of the complexity of interactions created with the numerous biotic and abiotic factors (i.e., environment, soil, interactions between microorganisms, etc.), the different formulates often show variable effects. In this review, we analyze the main factors that influence the effectiveness of PGPM applications and some of the applications that make them a useful tool for agroecological transition.

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“…An increase in the production of cereal by a factor of 3.2 was recorded as a result of 300% increase in consumption of K fertilizer between years 1961 and 2015 (Dhillon et al, 2019). However, potassium solubilizing organisms (KMS) have the capability to release soluble K from K bearing minerals (Das and Pradhan, 2016), therefore making the unavailable K available. KSMs like Acidothiobacillus ferrooxidans, Aspergilus terreus, Bacillus circulans, B. edaphicus, B. mucilaginosus, and Paenibacillus solubilize fixed form of K in soil making them available to plant via the processes such as organic acid production, acidolysis biofilm formation on mineral surfaces, and complex formation, hence improve growth and yield (Maurya et al 2016).…”

Section: Introductionmentioning

confidence: 99%

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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Potassium-Solubilizing Microorganisms and Their Role in Enhancing Soil Fertility and Health

Abstract: Potassium, the third major plant nutrient, occurs in potassium-bearing minerals such as feldspars and micas.

Cited by 85 publications

References 52 publications

Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

Comparison of the diversity and structure of the rhizosphere microbial community between the straight and twisted trunk types of Pinus yunnanensis

Plant-Microbe Interaction in Sustainable Agriculture: The Factors That May Influence the Efficacy of PGPM Application

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

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