The occurrence of rhizobacteria from Paspalum genotypes and their effects on plant growth

Amaral, Mayan Blanc; Ribeiro, Thiago Gonçalves; Alves, Gabriela Cavalcanti; Coelho, Márcia Reed Rodrigues; Matta, Frederico de Pina; Baldani, José Ivo; Baldani, V. L. D.

doi:10.1590/1678-992x-2020-0240

Cited by 2 publications

(3 citation statements)

References 46 publications

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“…85% of the mixture was shaken for 5 min in a Benchmark vortex and allowed to stand for 20 min, then the samples were serially diluted to 10 −4 and an aliquot of 100 µL was inoculated in triplicate, for each treatment, in Petri dishes with 20 mL of trypticase soy agar (TSA) culture medium and 1g of copper sulfate. They were incubated at 37 • C for 48 h and colony forming units (CFU) were counted [49].…”

Section: Colonies Count Of Rhizobacteriamentioning

confidence: 99%

Plant Growth-Promoting Rhizobacteria Improve Growth and Fruit Quality of Cucumber under Greenhouse Conditions

Zapata-Sifuentes

Hernández-Montiel²,

Sáenz‐Mata

et al. 2022

Plants

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Cucumber fruit is rich in fiber, carbohydrates, protein, magnesium, iron, vitamin B, vitamin C, flavonoids, phenolic compounds, and antioxidants. Agrochemical-based production of cucumber has tripled yields; however, excessive synthetic fertilization has caused problems in the accumulation of salts in the soil and has increased production costs. The objective of this study was to evaluate the effect of three strains of plant growth-promoting rhizobacteria (PGPR) on cucumber fruit growth and quality under greenhouse conditions. The rhizobacteria Pseudomonas paralactis (KBendo6p7), Sinorhizobium meliloti (KBecto9p6), and Acinetobacter radioresistens (KBendo3p1) was adjusted to 1 × 108 CFU mL−1. The results indicated that the inoculation with PGPR improved plant height, stem diameter, root length, secondary roots, biomass, fruit size, fruit diameter, and yield, as well as nutraceutical quality and antioxidant capacity, significantly increasing the response of plants inoculated with A.radioresistens and S.meliloti in comparison to the control. In sum, our findings showed the potential functions of the use of beneficial bacteria such as PGPR for crop production to reduce costs, decrease pollution, and achieve world food safety and security.

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Section: Colonies Count Of Rhizobacteriamentioning

confidence: 99%

Plant Growth-Promoting Rhizobacteria Improve Growth and Fruit Quality of Cucumber under Greenhouse Conditions

Zapata-Sifuentes

Hernández-Montiel²,

Sáenz‐Mata

et al. 2022

Plants

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“…In this work, through in vitro tests, the main strains that showed the potential to promote plant growth belonged to Bacillus , Enterobacter , Microbacterium, Micrococcus , Pantoea , and Pseudomonas ( Amaral et al, 2021 ). The main PGPB isolated from Paspalum genotypes were Acinetobacter , Bacillus , Cupriavidus , Dyadobacter , Enterobacter , Paraburkholderia , Pseudomonas , and Rhizobium .…”

Section: Discussionmentioning

confidence: 97%

“… Pérez and Martínez (2016) isolated and identified endophytic bacteria that is resistant to mercury associated with P. arundinaceum in Mina Santa Cruz, Bolivar., Colombia, aiming to obtain plant growth-promoting strains with potential for phytoremediation of mercury-contaminated soil. Amaral et al (2021) isolated and characterized plant growth-promoting rhizobacteria (PGPR) from 10 genotypes of Paspalum and evaluated the effect of inoculation on P. regnellii , P. atratum , and P. malacophyllum . The genotypes were also collected from the Paspalum germplasm bank at the Brazilian Agricultural Research Corporation; however, the genotype of P. atratum studied was cv.…”

Section: Discussionmentioning

confidence: 99%

Endophytic and rhizospheric bacteria associated with Paspalum atratum and its potential for plant growth promotion with different phosphate sources

et al. 2022

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The genus Paspalum belongs to the family Poaceae and has several species that are native to Brazil. The Paspalum Germplasm Bank (GB) of the Brazilian Agricultural Research Corporation comprises approximately 450 accessions from 50 species. Among these accessions, Paspalum atratum (BGP 308) has economic potential for forage purposes. However, the endophytic and rhizospheric microbial communities within this accession and their ability to promote plant growth remain unknown. The present study aimed to isolate the endophytic and rhizospheric bacteria associated with P. atratum and to assess their potential for plant growth improvement, so-called plant growth-promoting bacteria (PGPB). For the in vitro tests, the ability of nitrogen-fixing bacteria (NFB), phosphate solubilization (PS) and indoleacetic acid (IAA) production were evaluated. A total of 116 endophytic and rhizosphere bacteria were obtained from the isolation. In the in vitro tests, 43 (37.00%) of these isolates showed positive NFB, PS, and IAA results. These isolates were identified by 16S rDNA sequencing. The phosphate solubilization index (PSI) ranged from 2 to 3.61, all 43 strains performed biological nitrogen fixation and the IAA production ranged from 12.85 to 431.41 μg ml−1. Eight of these 43 isolates were evaluated in vivo in a greenhouse using P. atratum caryopsis. The pots were filled with soil prepared with three different phosphate sources and one control without phosphate. After growth, the plants were submitted to morphological, bromatological and chemical determination. Data were analyzed using analysis of variance (ANOVA) and principal component analysis (PCA). In the in vivo test, treatments 105 (Pseudomonas sp.) and 458 (Pseudomonas sp.) were the most significant for the crystalline phosphate source, 109 (Bacillus sp.) for the sedimentary phosphate source and, as for the soluble phosphate source most treatments that received bacterial isolates had higher phosphorus content in the dry matter than the uninoculated soluble phosphate control. The 105FCR (crystalline phosphate + Pseudomonas sp.), 109FSE (sedimentary phosphate + Bacillus sp.), and 110 FSE (sedimentary phosphate + Enterobacter sp.) treatments showed the best results for plant growth promotion. This work made it possible to determine the bacterial community associated with P. atratum (BGP308) and to obtain new potential plant growth-promoting strains.

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The occurrence of rhizobacteria from Paspalum genotypes and their effects on plant growth

Cited by 2 publications

References 46 publications

Plant Growth-Promoting Rhizobacteria Improve Growth and Fruit Quality of Cucumber under Greenhouse Conditions

Plant Growth-Promoting Rhizobacteria Improve Growth and Fruit Quality of Cucumber under Greenhouse Conditions

Endophytic and rhizospheric bacteria associated with Paspalum atratum and its potential for plant growth promotion with different phosphate sources

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