ISOLATION AND SCREENING OF BACTERIA FROM Zea mays PLANT GROWTH PROMOTERS

Toribio-Jiménez, Jeiry; Rodríguez-Barrera, Miguel Ángel; Hernández-Flores, Giovanni; Ruvacaba-Ledezma, Jesús Carlos; Castellanos-Escamilla, Mildred; Romero‐Ramírez, Yanet

doi:10.20937/rica.2017.33.esp01.13

Cited by 17 publications

(7 citation statements)

References 37 publications

(32 reference statements)

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“…Regard the in vitro plant growth promoter potential of the isolated strains, a nitrogen-fixing bacteria predominance (81%) was observed (Table 1). These results concur with reports of rhizospheric soils from corn (Toribio-Jiménez et al, 2017;Karnwal, 2017, Richard et al, 2018. In the production of indoloacteic acid (IAA), only 25% of the strains had this activity, the statistical analysis determined significant differences between them.…”

Section: Resultssupporting

confidence: 90%

“…From the total isolates, 62.5% (10 strains) were Grampositive, the remaining Gram-negative (Table 1). Similarly, Toribio-Jiménez et al (2017) and Abedinzadeh et al (2019) reported a higher number of Gram-positive in corn. The 56% of the isolated strains were aerobic or catalase-positive, similar to those reported by Karnwal (2017).…”

Section: Resultsmentioning

confidence: 84%

“…(Olanrewaju et al, 2017). There are several reports of groups of rhizobacteria associated with corn that promote its growth (Abedinzadeh et al, 2019;Bjelić et al, 2018;Karnwal, 2017;Richard et al, 2018;Toribio-Jiménez et al, 2017); however, native microorganisms may be better adapted to a specific region, making them ideal in strain selection processes, given that they could be more competitive than introduced bacteria (Karagöz, 2012). In this regard, even though in the state of Campeche, Mexico, corn is the main cultivated grain, with an area of approximately 150 thousand hectares (SAGARPA, 2019), there are no reports of native rhizobacteria used in its cultivation.…”

Section: Introductionmentioning

confidence: 99%

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Isolation and selection of rhizospheric bacteria with biofertilizing potential for corn cultivation

Díaz¹,

Quintal-Vargas

Santillán-Fernández³

et al. 2021

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Objective: To isolate and determine in a greenhouse environment the biofertilizingpotential of rhizospheric bacteria associated to corn (Zea mays L.) at Campeche,Mexico.Design / methodology / approach: Rhizospheric soils were collected from twocorn production zones with different management conditions. Bacterial strains wereisolated from these samples and their biofertilizing potential determined by in vitro2 and in vivo tests. The obtained data from both tests were assessed using ananalysis of variance (ANOVA) and a means comparison test (LSD, p ? 0.01).Results: In total, 16 rhizospheric bacteria were isolated, a higher number in non-mechanized soils (n = 10) compared to mechanized ones (n = 6). In the in vitrotests, the most representative activity corresponds to nitrogen fixation (81%)attributed to a higher bacteria percentage, while the activity with lower bacterianumbers corresponds to IAA production (25%). At the in vivo tests in corn plants,the YM1 strain presented the highest fresh and dry root biomass (20 and 2 g plant -1 , respectively). The YM4 strain promoted greater plant height (63.33 cm), and YM5registered the highest values in stem diameter (7.13 mm), root length (36.78 cm)and fresh shoot weight (12.03 g plant -1 ).Limitations / Implications: Strain evaluations were limited to controlledgreenhouse conditions.Conclusion: The YM1, YM4 and YM5 strains show potential for further evaluationas biofertilizers for corn cultivation under field conditions.

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Section: Resultssupporting

confidence: 90%

Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Isolation and selection of rhizospheric bacteria with biofertilizing potential for corn cultivation

Díaz¹,

Quintal-Vargas

Santillán-Fernández³

et al. 2021

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“…This could be due to these bacteria could produce organic acids such as gluconic acid, lactic acid, succinic acid, formic acid, malic acid, citric acid, oxalic acid, acetic acid or tartaric acid. These organic acids could help to dissolve efficiently not only the insoluble silicate minerals but also insoluble phosphate minerals and become the soluble one for bacteria and plant to absorb for their growth (Khan et al, 2014) and the outcome of the previous studies showed that Citrobacter freundii had another function in phosphate solubilization in liquid medium containing Ca 3 (PO 4 ) 2 as phosphorus source and Klebsiella aerogenes as well in phosphate solubilization (Toribio-Jiménez et al, 2017;Samina et al, 2010). However, these bacteria's function in phosphate solubilization for AlPO 4 and FePO 4 as phosphorous sources for bacteria has still not published yet.…”

Section: Discussionmentioning

confidence: 99%

Evaluation of some biophysical characteristics of five silicate solubilizing bacteria isolated from different ecosystems

Đường¹,

Nghĩa

2020

Vietnam J. Biotechnol.

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Silicate solubilizing bacteria (SSB) are key microorganisms to solubilize silicate minerals in the soil. Silicon helps to increase the growth and yield of plants and to enhance the environmental stress tolerance capability of plants. The aim of this study was to evaluate the effect of several factors like pH, salinity, and temperature on silicate solubilizing capacity of five selected SSB. Moreover, phosphorus solubilizing, nitrogen-fixing and indole-3-acetic acid (IAA) synthesizing capacity of these five bacteria were also tested. Liquid soil extract medium containing 0.25% Mg2O8Si3 was used in this study. Abilities of bacteria in phosphorous solubility, nitrogen fixation, and IAA synthesis were tested in NBRIP, Burk’s and NBRIP containing 100 mg L-1 tryptophan media, respectively. The results of the study indicated that five SSB showed their high capacity in silicate solubilization at pH 7.0, NaCl 0.0% and 35oC. However, at a concentration of NaCl 0.5%, these five SSB still solubilized well silicate mineral. Moreover, they also solubilized effectively three different insoluble phosphate sources of Ca3(PO4)2, AlPO4 and FePO4 with a range varied between 105.8 and 928.7 mg P2O5 L-1, 33.9 and 49.6 mg P2O5 L-1, and 1.94 and 34.1 mg P2O5 L-1, respectively. They also fixed biologically nitrogen with a range from 1.37 to 5.09 mg NH4+ L-1 after 2 incubation days. Finally, they also showed their ability in IAA synthesis with an amount between 4.85 and 51.5 mg IAA L-1. In short, these five SSB in this study not only had the ability in silicate solubilization but also had other functions in plant growth promotion.

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“…B. licheniformis is recognized by multiple biotechnological applications such as: 1) bioremediation of sites contaminated by pesticides, fertilizers, hydrocarbons and heavy metals, 2) biological control in the development of biofungicides due to antifungal activity, 3) concrete production for its ability to precipitate calcium carbonate, and 4) biofertilizers for the characteristics of plant growth promotion [14]. B. licheniformis M2-7, is a mobile, facultative anaerobic, and thermoresistant bacterium isolated from hot springs [15].…”

Section: Introductionmentioning

confidence: 99%

Carbon Storage Regulator A (csrA) Gene Regulates Motility and Growth of Bacillus licheniformis in the Presence of Hydrocarbons

Angel¹,

Segura²,

Jiménez³

et al. 2020

Microbiology and Biotechnology Letters

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The global carbon storage regulator (Csr) system is conserved in bacteria and functions as a regulator in the exponential and stationary phases of growth in batch culture. The Csr system plays a role in the central carbon metabolism, virulence, motility, resistance to oxidative stress, and biofilm formation. Although the Csr was extensively studied in Gram negative bacteria, it has been reported only in the control of motility in Bacillus subtilis among Gram positive bacteria. The goal of this study was to explore the role of the csrA gene of Bacillus licheniformis M2-7 on motility and the bacterial ability to use hydrocarbons as carbon source. We deleted the csrA gene of B. licheniformis M2-7 using the plasmid pCsr-L, harboring the spectinomycin cassette obtained from the plasmid pHP45-omega2. Mutants were grown on culture medium supplemented with 2% glucose or 0.1% gasoline and motility was assessed by electron microscopy. We observed that CsrA negatively regulates motility by controlling the expression of the hag gene and the synthesis of flagellin. Notably, we showed the ability of B. licheniformis to use gasoline as a unique carbon source. Our results demonstrated that CsrA is an indispensable regulator for the growth of B. licheniformis M2-7 on gasoline.

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ISOLATION AND SCREENING OF BACTERIA FROM Zea mays PLANT GROWTH PROMOTERS

Cited by 17 publications

References 37 publications

Isolation and selection of rhizospheric bacteria with biofertilizing potential for corn cultivation

Isolation and selection of rhizospheric bacteria with biofertilizing potential for corn cultivation

Evaluation of some biophysical characteristics of five silicate solubilizing bacteria isolated from different ecosystems

Carbon Storage Regulator A (csrA) Gene Regulates Motility and Growth of Bacillus licheniformis in the Presence of Hydrocarbons

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