Potassium solubilizing microorganisms as soil health engineers: An insight into molecular mechanism

Jain, Devendra; Saheewala, Heena; Sanadhaya, Suman; Joshi, Arunabh; Bhojiya, Ali Asger; Verma, Abhishek; Mohanty, Santosh Ranjan

doi:10.1016/b978-0-323-89973-4.00007-7

Cited by 11 publications

(11 citation statements)

References 44 publications

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“…It is involved in increasing plant resistance to biotic and abiotic stresses and is required to activate most enzymes involved in plant processes ( Ahmad et al., 2016 ). It was also reported that the major mechanism of K solubilization is production of organic and inorganic acids ( Jain et al., 2022 ). As for phosphorus, most K is unavailable for plant uptake, so potassium solubilizing bacteria can be used to solubilize potassium-insoluble minerals such as biotite, feldspat, muscovite, vermiculite, smectite, orthoclase, and mica to soluble forms, which are then available for plant uptake ( Ahmad et al., 2016 ).…”

Section: Discussionmentioning

confidence: 99%

Phosphate and potash solubilizing bacteria from Moroccan phosphate mine showing antagonism to bacterial canker agent and inducing effective tomato growth promotion

et al. 2023

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Most agricultural soils are facing limited phosphorus availability that challenges modern agriculture. Phosphate solubilizing microbia (PSM) has been explored extensively as potential biofertilizers for plant growth and nutrition, and harnessing phosphate rich areas could provide such beneficial microorganisms. Isolation of PSM from Moroccan rock phosphate led to the selection of two bacterial isolates, Bg22c and Bg32c, showing high solubilization potential. The two isolates were also tested for other in vitro PGPR effects and compared to a non-phosphate solubilizing bacterium Bg15d. In addition to phosphates, Bg22c and Bg32c were able to solubilize insoluble potassium and zinc forms (P, K, and Zn solubilizers) and produce indole-acetic acid (IAA). Mechanisms of solubilization involved production of organic acids as demonstrated by HPLC. In vitro, the isolates Bg22c and Bg15d were able to antagonize the phytopathogenic bacteria Clavibacter michiganensis subsp. michiganensis, causal agent of tomato bacterial canker disease. Phenotypic and molecular identification by 16S rDNA sequencing demonstrated delineation of Bg32c and Bg15d as members of the genus Pseudomonas and Bg22c as member of the genus Serratia. The two isolates Bg22c and Bg32c were further tested either alone or in a consortium and compared to the non-P, K, and Zn solubilizing Pseudomonas strain Bg15d for their efficacy to promote tomato growth and yield. They were also compared to treatment with a conventional NPK fertilizer. Under greenhouse conditions, Pseudomonas strain Bg32c remarkably improved the growth of whole plant height, root length, shoot and root weight, number of leaves and fruits, as well as fruit fresh weight. This strain also induced stomatal conductance enhancement. The strain also improved total soluble phenolic compounds, total sugars, protein, phosphorus and phenolic compounds contents compared to the negative control. All increases were more pronounced in plants inoculated with strain Bg32c in comparison with control and strain Bg15d. The strain Bg32c could be considered a potential candidate for formulation of a biofertilizer in order to improve tomato growth.

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Section: Discussionmentioning

confidence: 99%

Phosphate and potash solubilizing bacteria from Moroccan phosphate mine showing antagonism to bacterial canker agent and inducing effective tomato growth promotion

et al. 2023

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“…As for the soil in which the bush grows, the values of reserve-k in the subsurface soil were higher than the values of potassium in the surface soil, as shown in the table (3). The phase and reserve-k is higher than the cultivated soils, as the potassium concentration reserve-k was 18.4-34.1 cmol kg -1 , we will finance potassium cmol kg -1 , and this indicates that the soil condition is moderate in content and does not need fertilizing according to the limits set by [8]. the values of potassium reserve-k in these soils can be explained by the lack of exploitation of these soils in the cultivation of a specific crop, where the bush grows in which its spread is not dense and thus the lack of spread and penetration of the roots in a homogeneous manner, meaning that there is no significant depletion as in the densely planted soils.…”

Section: Regulatory Capacity Of Soils To Replace Potassiummentioning

confidence: 97%

“…The results confirmed that the agriculturally exploited soils are poor in potassium, where the reserve-k concentration was 0.460-0.400 cmol kg -1 . And based on the limits set by [8]. in determining the need for potassium fertilizing, which is when the values of the reserve-k are less than 0.512 cmol kg -1 that is considered poor in its content of reserve-k and when it ranges between 1.023 -0.512 cmol kg -1 is considered to have moderate content and does not need fertilizing, and when the values of potassium reserve are more than 1.023 cmol kg -1 of potassium reserve is considered rich in its content of stored potassium.…”

Section: Regulatory Capacity Of Soils To Replace Potassiummentioning

confidence: 99%

Potassium Forms Status in Some Iraqi Sedimentary Soils and Effect of Cultivation on It

Hamid

Kadhim

2022

IOP Conf. Ser.: Earth Environ. Sci.

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A field experiment was carried out in Al-Hussainiya area / Al-Mussaib district within Babil Governorate to study the extraction and estimation of potassium in cultivated soil, and bush soil, and uncultivated soil, to identify the state of the soil in terms of its ability to supply potassium (poor potassium - moderate potassium - rich in potassium). Soil samples were collected from the study area in the period (1-4-2022) for each soil from the surface depth (0-30) cm and sub-surface (30-60) cm. Potassium was extracted from the study soil and the amount of potassium Soluble in water, and the exchangable, reserve-K, primary step-K and total step-K, and total K. The value of reserve-K was 0.40 and 0.46 cmol in the cultivated soil, 0.99 and 1.07 cmol in the uncultivated soil, 0.66 and 0.87 cmol in the bush soil and the surface and subsurface layers, respectively, and the initial step-K values were 0.213 and 0.487 cmol in the cultivated soil and 0.845 and 0.929 cmol in uncultivated soil and 0.48 and 0.511 bush soil, and value of total step-K was 0.982 and 0.944 cmol in the cultivated soil, 3.073 and 3.136 cmol in the uncultivated soil, 2.795 and 2.109 cmol in the bush soil and the surface and subsurface layers, respectively. Based on the results obtained and under the conditions of this study, the concentration of potassium Soluble in water and exchangable within the content of the dry and semi-arid areas, and that the exploitation of the soil by intensive cultivation constantly led to a decrease in the values of step-K and reserve-K, and that the concentration of step-K and reserve-K is lower in the subsurface layers (30- 60) cm in the cultivated soil and the soil in which the bush grows. As for the uncultivated soils, the potassium values are higher and almost close in the subsurface layer compared to the surface. As a result of the conditions of use, the sequence of the step-K and reserve-K in the study soils are as follows: Cultivated soil > bush soil > uncultivated soil. In addition to the need to use potassium fertilizers under conditions of intensive cultivation.

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“…In addition to nitrogen, both phosphorus and potassium are key to plant metabolism and physiology. Both are present in soil but only small amounts are in forms that are bioavailable to plants; they can be made more bioavailable via microbial processes. , Although there are references in the scientific literature to engineering microorganisms to provide more P and K, we are not aware of commercial attempts being made at this time. We anticipate efforts around increasing P and K bioavailability in the future.…”

Section: Gems In Food and Agriculturementioning

confidence: 99%

Perspectives on Genetically Engineered Microorganisms and Their Regulation in the United States

Shams,

Fischer,

Bodnar

et al. 2024

ACS Synth. Biol.

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Genetically engineered microorganisms (GEMs) represent a new paradigm in our ability to address the needs of a growing, changing world. GEMs are being used in agriculture, food production and additives, manufacturing, commodity and noncommodity products, environmental remediation, etc., with even more applications in the pipeline. Along with modern advances in genome-manipulating technologies, new manufacturing processes, markets, and attitudes are driving a boom in more products that contain or are derived from GEMs. Consequentially, researchers and developers are poised to interact with biotechnology regulatory policies that have been in effect for decades, but which are out of pace with rapidly changing scientific advances and knowledge. In the United States, biotechnology is regulated by multiple agencies with overlapping responsibilities. This poses a challenge for both developers and regulators to simultaneously allow new innovation and products into the market while also ensuring their safety and efficacy for the public and environment. This article attempts to highlight the various factors that interact between regulatory policy and development of GEMs in the United States, with perspectives from both regulators and developers. We present insights from a 2022 workshop hosted at the University of California, Berkeley that convened regulators from U.S. regulatory agencies and industry developers of various GEMs and GEM-derived products. We highlight several new biotechnologies and applications that are driving innovation in this space, and how regulatory agencies evaluate and assess these products according to current policies. Additionally, we describe recent updates to regulations that incorporate new technology and knowledge and how they can adapt further to effectively continue regulating for the future.

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Potassium solubilizing microorganisms as soil health engineers: An insight into molecular mechanism

Cited by 11 publications

References 44 publications

Phosphate and potash solubilizing bacteria from Moroccan phosphate mine showing antagonism to bacterial canker agent and inducing effective tomato growth promotion

Phosphate and potash solubilizing bacteria from Moroccan phosphate mine showing antagonism to bacterial canker agent and inducing effective tomato growth promotion

Potassium Forms Status in Some Iraqi Sedimentary Soils and Effect of Cultivation on It

Perspectives on Genetically Engineered Microorganisms and Their Regulation in the United States

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