Efficiency of Combining Strains Ag87 (Bacillus megaterium) and Ag94 (Lysinibacillus sp.) as Phosphate Solubilizers and Growth Promoters in Maize

Massucato, Luana Rainieri; Almeida, Suelen Regina de Araújo; Silva, Mayara Barbosa; Mosela, Mirela; Zeffa, Douglas Mariani; Nogueira, Alexandre Simões; Filho, Renato Barros de Lima; Mian, Silas; Higashi, Allan Yukio; Teixeira, Gustavo Manoel; Shimizu, Gabriel Danilo; Giacomin, Renata Mussoi; Fendrich, Ricardo Cancio; Faria, Marcos Ventura; Scapim, Carlos Alberto; Gonçalves, Leandro Simões Azeredo

doi:10.3390/microorganisms10071401

Cited by 5 publications

(4 citation statements)

References 43 publications

(48 reference statements)

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“…Its action generally involves the release of low-molecular-density organic compounds through which their hydroxyl and carboxyl groups chelate the cations bound to insoluble phosphate, thereby promoting its solubilization [26]. The scientific community places adequate emphasis on its application to crops such as soybean [27,28], corn [29], and millet [30]. The common bean also has importance to agriculture and the bioeconomy.…”

Section: The Impact Of Psb On Photosynthetic Componentsmentioning

confidence: 99%

UAV Multispectral Data: A Reliable Approach for Managing Phosphate-Solubilizing Bacteria in Common Bean

et al. 2022

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Remote sensing can offer stakeholders opportunities to make precise and accurate decisions on agricultural activities. For instance, farmers can exploit aircraft systems to acquire survey-level, high-resolution imagery data for crop and soil management. Therefore, the objective of this study was to analyze whether an unmanned aerial vehicle (UAV) allows for the assessment and monitoring of biofertilization of the common bean upon vegetation indices (VIs). The biological treatment of the legume crop included its inoculation with phosphate-solubilizing bacteria (PSB), namely Bacillus subtilis and B. megaterium. Indicators of photosynthetic performance, such as chlorophylls (a and b) and carotenoids, were measured from actively growing leaves to determine effectiveness. In addition, images were acquired in the field, both spatially and temporally, to establish functional relationships between biometric and computational features. Microorganisms manifested as growth-promoting agents to the crop as they significantly increased its quantities of light-harvesting pigments. VIs allowed for predicting their impact on photosynthetic performance, making them on-site markers of PSB. Therefore, this research can provide insights into the remote, non-destructive mapping of spectral changes in the common bean upon the application of PSB. Imagery data from UAV would enable producers to generate information on the crop to intervene in the field at the right time and place for improved utilization of biofertilizers.

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Section: The Impact Of Psb On Photosynthetic Componentsmentioning

confidence: 99%

UAV Multispectral Data: A Reliable Approach for Managing Phosphate-Solubilizing Bacteria in Common Bean

et al. 2022

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“…In addition to their own ability to alter phosphorus speciation, PSB can act synergistically with phosphate fertilizers, and their joint application has been shown to improve phosphorus utilization [12]. PSB are also gradually becoming raw materials for biofertilizers and inoculants; the effect of their application in agricultural fields is also noticeable and can significantly increase the productivity of agronomic crops in agroecological niches [13,14]. Currently, research on PSB mechanisms is limited in scope and lacks comprehensive studies from different perspectives.…”

Section: Introductionmentioning

confidence: 99%

Phosphate-Solubilizing Bacteria: Advances in Their Physiology, Molecular Mechanisms and Microbial Community Effects

Pan,

Cai

2023

Microorganisms

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Phosphorus is an essential nutrient for all life on earth and has a major impact on plant growth and crop yield. The forms of phosphorus that can be directly absorbed and utilized by plants are mainly HPO42− and H2PO4−, which are known as usable phosphorus. At present, the total phosphorus content of soils worldwide is 400–1000 mg/kg, of which only 1.00–2.50% is plant-available, which seriously affects the growth of plants and the development of agriculture, resulting in a high level of total phosphorus in soils and a scarcity of available phosphorus. Traditional methods of applying phosphorus fertilizer cannot address phosphorus deficiency problems; they harm the environment and the ore material is a nonrenewable natural resource. Therefore, it is imperative to find alternative environmentally compatible and economically viable strategies to address phosphorus scarcity. Phosphorus-solubilizing bacteria (PSB) can convert insoluble phosphorus in the soil into usable phosphorus that can be directly absorbed by plants, thus improving the uptake and utilization of phosphorus by plants. However, there is no clear and systematic report on the mechanism of action of PSB. Therefore, this paper summarizes the discovery process, species, and distribution of PSB, focusing on the physiological mechanisms outlining the processes of acidolysis, enzymolysis, chelation and complexation reactions of PSB. The related genes regulating PSB acidolysis and enzymatic action as well as genes related to phosphate transport and the molecular direction mechanism of its pathway are examined. The effects of PSB on the structure and abundance of microbial communities in soil are also described, illustrating the mechanism of how PSB interact with microorganisms in soil and indirectly increase the amount of available phosphorus in soil. And three perspectives are considered in further exploring the PSB mechanism in utilizing a synergistic multi-omics approach, exploring PSB-related regulatory genes in different phosphorus levels and investigating the application of PSB as a microbial fungicide. This paper aims to provide theoretical support for improving the utilization of soil insoluble phosphorus and providing optimal management of elemental phosphorus in the future.

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“…It may fulfill 19-20% of the needed N for oilseed crops (Puri et al 2016a) and this percent increase up to 30% in some crops like wheat (de Freitas et al 2000) and maize (Puri et al 2016b). Another example of biofertilizers is Bacillus megaterium that can solubilize soil-P (Massucato et al 2022) via promoting root exudates, and increasing malic, oxalic and acetic acids (An et al 2022). For increasing K availability in soil, inoculation with either of Paenibacillus polymyxa or Bacillus circulans can be used successfully (Abdel Latef et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Wheat Productivity as Influenced by Integrated Mineral, Organic and Biofertilization

2023

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XPONENTIAL population growth and soaring fertilizer prices are among the main challenges threating food security worldwide. Probably, substituting chemical inputs (partially or completely) with organic and/or bio-alternatives are the keys to achieve sustainable development. Thus, a field experiment was conducted for two successive seasons in a randomized block design to achieve this goal, comprising the following treatments: 100% mineral P and K fertilizers (T 1 , control), 10 g potassium humate (KH) kg -1 (T 2 ), 10 g humic acid (HA) kg -1 (T 3 ) and 10 g kg -1 fulvic acid (FA) (T 4 ). For treatments from T 2 to T 4 , supplementary doses of chemical fertilizers were added to satisfy wheat needs for P and K. Also, a combined treatment of 50% biogas (added on nitrogen bases) plus supplementary PK doses in the form of (i) rock phosphate and feldspars + biofertilizers (Bacillus megatherium and Bacillus circulans) (T 5 ) or (ii) chemical P and K fertilizers were included (T 6 ). All plots were planted with wheat and received 20% of the recommended N requirements via N 2 -fixation with Bacillus polymyxa while the other 80% was accomplished as ammonium nitrate (after considering the added N in organic additives). Key findings indicate that application of biogas+ supplementary chemical PK fertilizers (T 6 ) recorded the highest increases in P and K available contents in soil. This in turn significantly raised their concentrations within different plant parts and boosted straw and grain yields during the two seasons of study. Application of 100% mineral PK (T 1 ) recorded significantly lower values in all abovementioned parameters versus T 6 . Nevertheless, these two treatments (T 1 and T 6 ) recorded comparable increases in 1000-grain weight, plant height, spike lengths and number of grains per spike. Application of KH, HA and FA as partial substitutes for chemical fertilizers (T 2 -T 4 ) lessened significantly nutrient bioavailability and their contents within wheat parts; as a result, plant growth and yield components declined significantly. The least values were recorded for the treatment that received biogas+ rock phosphate and feldspar + biofertilizers (T 5 ). Overall, straw and grain yields of wheat plants were correlated significantly with P and K contents in both shoots and grains. In conclusion, the combination between biogas and chemical fertilizers seemed to be the optimum selection to satisfy wheat needs for nutrients; hence increase wheat productivity under arid conditions.

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Efficiency of Combining Strains Ag87 (Bacillus megaterium) and Ag94 (Lysinibacillus sp.) as Phosphate Solubilizers and Growth Promoters in Maize

Cited by 5 publications

References 43 publications

UAV Multispectral Data: A Reliable Approach for Managing Phosphate-Solubilizing Bacteria in Common Bean

UAV Multispectral Data: A Reliable Approach for Managing Phosphate-Solubilizing Bacteria in Common Bean

Phosphate-Solubilizing Bacteria: Advances in Their Physiology, Molecular Mechanisms and Microbial Community Effects

Wheat Productivity as Influenced by Integrated Mineral, Organic and Biofertilization

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