Potassium Solubilization: Mechanism and Functional Impact on Plant Growth

Berde, Chanda Vikrant; Gawde, Sonal Suresh; Berde, Vikrant B.

doi:10.1007/978-3-030-73507-4_5

Cited by 6 publications

(2 citation statements)

References 77 publications

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“…Potassium is a macronutrient essential for plant growth and is involved in several plant physiological processes, including enzyme activation, protein synthesis, and photosynthesis. Through the formation and excretion of organic acids, including citric, oxalic, and tartaric acids, potassium solubilizing bacteria (KSB) can solubilize unavailable forms of K-bearing minerals such as micas, illite, and orthoclase [59,60]. Several studies have shown that different KSB can solubilize K in vitro and in the rhizosphere [55,61,62].…”

Section: Discussionmentioning

confidence: 99%

Analyzing Single and Combined Cultures of Plant Growth-Promoting Rhizobacteria Isolates from Afghanistan as a Potential Biofertilizer for Rice Growth and Development

Habibi,

Yokoyama,

Haidari

et al. 2023

Agriculture

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Developing multi-functional, environmentally friendly biofertilizers can help reduce chemical fertilizer usage. This study examined single and combined application effects of four plant growth-promoting rhizobacteria (PGPR) strains: AF124 (Rhizobium daejeonense), AF74 (Enterobacter cloacae), AF96 (Pseudomonas putida), and AF42 (Enterobacter cloacae), isolated from alkaline salt-stressed soils from Afghanistan. Physiological features such as nitrogen (N2) fixation, indole-3-acetic acid (IAA), organic acid production, and P and K solubilization of bacteria in single or combined cultures in vitro were examined. A single application of AF124 and AF74 showed significantly higher IAA production than the combined application of dual, triple, and quadruple PGPR treatments. Regarding acetylene reduction activity, an N2-fixation activity indicator, a single application of AF124 showed the highest value, followed by a triple application of AF124 + AF96 + AF42. The P-solubilization activity and organic acid production were lower in the single application of AF124 but higher with other strains in the combined applications, which resulted in the secretion of multiple organic acids into the medium. The highest solubilized K value was obtained from the quadruple application compared to other treatments. In the rice inoculation test, all single and combined PGPR treatments increased its growth parameters, such as root length and root and shoot dry biomass. The present results indicate that these four PGPR strains can potentially contribute to developing multi-functional bio-fertilizer formulations.

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Section: Discussionmentioning

confidence: 99%

Analyzing Single and Combined Cultures of Plant Growth-Promoting Rhizobacteria Isolates from Afghanistan as a Potential Biofertilizer for Rice Growth and Development

Habibi,

Yokoyama,

Haidari

et al. 2023

Agriculture

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“…Soil microorganisms play an important role in biogeochemical cycles ( Bertrand et al., 2015 ). Microorganisms can provide nutrients to plants by solubilizing bound mineral components through acidolysis, complexation, chelation and exchange reactions ( Vaid et al., 2014 ; Kamran et al., 2017 ; Berde et al, 2021 ). A number of strains of the genera Bacillus and Streptomyces have been found to be capable of releasing metal ions from minerals ( Sindhu et al., 2014 ; Cumpa-Velásquez, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Active permanent greening – a new slope greening technology based on mineral solubilizing microorganisms

Wang,

Tang,

Liu

et al. 2023

Front. Plant Sci.

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IntroductionWith social and economic development and the associated large-scale exploitation of natural resources, the number of slopes has significantly increased. As slope instability can lead to serious geological disasters, the ecological protection and reconstruction of slopes has become a hot topic of common global concern.MethodsIn order to achieve scientific slope management and overcome the difficulty of maintaining slope greening in the long term, this study explored eight strategies (A, B, C, AB, AC, BC, ABC, CK), involving different patented mineral solubilizing microorganisms (MSMs), and analyzed the field application of active permanent greening (APG) based on MSMs.ResultsThe results revealed that MSMs significantly increased the content of effective metal ions and available nutrients in soil and enhanced soil enzyme activity. Among all strategies, strategy A showed significant superiority, with soil effective calcium, magnesium, potassium, nitrogen, phosphorus and organic matter contents increasing by 51.62%, 55.41%, 30.42%, 39.77%, 181.69% and 76.92%, respectively, while urease, sucrase and peroxidase activities increased by 89.59%, 74.68% and 85.30%. MSMs strongly promoted the growth of Amorpha. Strategy A showed the best performance, with plant seedling height, ground diameter, leaf area, root length, and root volume increasing by 95.75%, 47.78%, 124.14%, 108.83%, and 139. 86%, respectively. According to a comprehensive evaluation using the entropy-analysis hierarchy process, strategy A has great potential for application. The field test results verified that APG has significantly better greening performance than the traditional greening method, with high vegetation cover and stable soil layer.DiscussionThe results of this study provide a reliable practical basis and technical reference for the development, promotion, and application of APG.

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Zinc oxide nanoparticles and PGPR strengthen salinity tolerance and productivity of wheat irrigated with saline water in sodic-saline soil

Alharbi,

Hafez,

Omara

et al. 2023

Plant Soil

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Background and aims Wheat growth and productivity need an exceptional approach to resist the deleterious effects of salt stress. Methods This study proposed to assess the effectiveness of the exogenous application of plant growth-promoting rhizobacteria (PGPR; i.e., Azospirillum lipoferum SP2, Bacillus coagulans NCAIM B.01123, Bacillus circulance NCAIM B.02324, and Bacillus subtilis MF497446) at a rate of 950 g ha−1 and foliar application of zinc oxide nanoparticles (ZnO-NPs; 500 mg L−1) against irrigation with saline (from a groundwater well) and fresh water (from the Nile River water) of wheat (Triticum aestivum L.) in sodic-saline soil during 2021 and 2022 growing seasons under open field conditions. Results The integrated application of PGPR and ZnO-NPs protected wheat plants against irrigation with saline water through increasing antioxidant enzyme activities, i.e., catalase (47%), peroxidase (102%), and superoxide dismutase (106%), and K+ uptake (27%) over control. Conversely, higher stress mitigation through the integrated application was illustrated by a considerable decline in electrolyte leakage (−62%), proline (−39%), MDA (−56%), and H2O2 levels (−60%). The N uptake by wheat grains increased by 57% upon treating plants with PGPR+ZnO-NPs, which also increased the Zn contents in grain and straw by 117% and 72%, respectively. Also, PGPR+ZnO-NPs increased the activity of soil urease and dehydrogenase by 80% and 232%, respectively, in plots irrigated with saline water. Conclusion The results of the present investigation suggest the use of the integrated application of PGPR and ZnO-NPs to protect wheat plants against salinity of soil and/ or irrigation water.

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Potassium Solubilization: Mechanism and Functional Impact on Plant Growth

Cited by 6 publications

References 77 publications

Analyzing Single and Combined Cultures of Plant Growth-Promoting Rhizobacteria Isolates from Afghanistan as a Potential Biofertilizer for Rice Growth and Development

Analyzing Single and Combined Cultures of Plant Growth-Promoting Rhizobacteria Isolates from Afghanistan as a Potential Biofertilizer for Rice Growth and Development

Active permanent greening – a new slope greening technology based on mineral solubilizing microorganisms

Zinc oxide nanoparticles and PGPR strengthen salinity tolerance and productivity of wheat irrigated with saline water in sodic-saline soil

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