Potassium Solubilizing Microbes: Diversity, Ecological Significances and Biotechnological Applications

Pandey, Dheeraj; Kehri, Harbans Kaur; Zoomi, Ifra; Singh, Uma; Chaudhri, Kanhaiya L.; Akhtar, Ovaid

doi:10.1007/978-3-030-38453-1_9

Cited by 12 publications

(8 citation statements)

References 130 publications

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“…Genes with a higher abundance under drought in native-invasive mixes had putative functional annotations related largely to nutrient acquisition. For example, potassium is a critical macronutrient for microbes and their plant hosts (Pandey et al, 2020), and increased abundance of genes with predicted Kup, a potassium uptake protein, annotations may relate to increased competition for limited nutrients in native-invasive mixes during drought. Another putative function that increased, RpoN, can act as a regulator of nitrogen assimilation and virulence (Kullik et al, 1991), and in both capacities could provide competitive dominance for invasives through nutrient acquisition or microbial warfare with nativeassociated microbes, assuming that genes with this annotation perform similarly here.…”

Section: Drought Amplifies Microbial Effects Of Invasive Competitionmentioning

confidence: 99%

Invasive plant species interact with drought to shift key functions and families in the native rhizosphere

Ettinger

LaForgia

2023

Preprint

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Interactions between species invasions and climate change have the potential to drive changes in plant communities more than either factor alone. One pathway through which these effects can occur is via changes to the rhizosphere microbial community. Invasive plants can alter the taxonomic and functional makeup of these microbial communities, which may affect natives' abilities to compete with invaders. At the same time, climate change is leading to more frequent extreme wet and dry events, shifting the composition of microbial taxa available in the soil. Understanding the response of plant communities to these combined global change drivers requires a comprehensive approach that assesses the relationship between plant competition and belowground rhizosphere microbial community responses. Here we use a field experiment in a California grassland with a set of six native annual forbs (i.e., wildflowers) and three invasive annual grasses to test how competition with invasive plants alters both identity and function in the native rhizosphere microbiome, and whether competition between these groups interacts with rainfall to amplify or ameliorate these microbial shifts. Metagenomics of rhizosphere communities revealed that drought combined with competition from invaders altered a higher number of functions and families in the native rhizosphere compared to invasive competition alone or drought alone. This suggests invasion-driven shifts in the microbial community may be involved in weakening natives' ability to cope with climate change, especially drought. Understanding the role of the microbial community under invasion and climate change may be critical to mitigating the negative effects of these interacting global change drivers on native communities.

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Section: Drought Amplifies Microbial Effects Of Invasive Competitionmentioning

confidence: 99%

Invasive plant species interact with drought to shift key functions and families in the native rhizosphere

Ettinger

LaForgia

2023

Preprint

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“…The inoculated plates were incubated at 28°C for 7 days in the dark, and the growth zone around the cultured disc was observed [46]. The eight isolates were tested for K solubilization activity using the Aleksandrov Agar medium, which shows growth zone formation as an indicator of K solubilizers [47]. In addition, isolates were cultivated on Petri dishes containing 15 mL of NBRIP agar to study the capability of strains for solubilizing insoluble phosphate [46,48].…”

Section: Metal Solubilizationmentioning

confidence: 99%

Comprehensive Characterization and Screening of Different Trichoderma Isolates as Plant Growth Promoters: Insight to Metal Solubilization, Enzymatic Activity, and Antagonistic Effect

Hewedy

Mansour

Ali

et al. 2022

Preprint

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The present study aimed to isolate a Trichoderma species with dual action as a plant growth promoter in conjunction with antagonistic activity against the plant pathogen Colletotrichum lagenarium. Using internal transcribed spacer (ITS) sequences and inter simple sequence repeat markers (ISSR), eight strains of Trichoderma were identified, and their diversity was studied. In addition, some plant growth promoters such as indole acetic acid (IAA) and element solubilization were evaluated. Moreover, the activity of amylase, pectinase, cellulase, and chitinase was studied in the isolated species. Results showed that Trichoderma viride (T27) and Trichoderma atrobrunneum (T40) produced the highest IAA (80.36, 61.39 µg/mL), respectively and K solubilization efficiency (KE) (12.2 and 14.4, respectively). In contrast, Trichoderma afroharzianum (T31) and Trichoderma atrobrunneum (T40) had the highest zinc (Zn) solubilizer (7.1 and 7.2 cm), respectively. Strains T. viride (T27) and T. atrobrunneum (T41) showed the highest antagonistic activity against anthracnose fungi; therefore, they were examined under scanning electron microscopy. The SDS-PAGE protein pattern and its antigenicity analysis ranged between 40 and 180 kDa. The results of SDS-PAGE indicated that with chitin, both T27 and T40 presented different bands in their protein profile compared to the control (without chitin). The results suggest that T. viride (T27) and T. atrobrunneum (T40) could be used as eco-friendly bio-fungicides with a high potential plant growth promoter production.

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“…Potassium solubilizing microorganisms solubilize mineral potassium that are unavailable to plant to become accessible and available to plant (Meena et al 2016), PSM mobilizes K from soil mineral making such available to plants (Pandey et al 2020). Jain et al (2022) explains that potassium solubilizing microorganisms convert the unavailable form of mineral K to forms that are available to plant, indicating that KSMs possess a potential to improve the potassium availability in soils and hence can play an important role in the potassium nutrient management the condition of K-limited soils and can therefore reduce the use of potassium-based chemical fertilizers.…”

Section: Introductionmentioning

confidence: 99%

“…Mineral K that is usually made available by KSM contributes immensely to K supply in many soils (Meena et al 2016). This mineral K could make available the K required by plant and could also preserve ecosystem productivity in the long run by reducing K leaching (Pandey et al 2020). This will hence reduce the quantity of chemical K fertilizer required to meet plant K requirement.…”

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 Microbes: Diversity, Ecological Significances and Biotechnological Applications

Cited by 12 publications

References 130 publications

Invasive plant species interact with drought to shift key functions and families in the native rhizosphere

Invasive plant species interact with drought to shift key functions and families in the native rhizosphere

Comprehensive Characterization and Screening of Different Trichoderma Isolates as Plant Growth Promoters: Insight to Metal Solubilization, Enzymatic Activity, and Antagonistic Effect

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

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