Agronomic effectiveness of rhizobia strains on cowpea in two consecutive years

Xavier, Gustavo Ribeiro; Runjanek, Norma G.; Santos, Carolina Etienne de Rosália e Silva; Freitas, Ana Dolores Santiago de; Silva, Vinícius Santos Gomes da; Silva, Aleksandro Ferreira da; Ferreira, Juscélia da Silva; Stamford, Newton Pereira; Martins, Lindete Míria Vieira; Jakson, Leite; Morgado, L. B.; Alcantara, R. M. C. M. de

doi:10.21475/ajcs.17.11.09.pne715

Cited by 11 publications

(11 citation statements)

References 14 publications

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“…The increment of values in the production variables on inoculated treatments demonstrates the efficiency of these strains to supply the required N and promote vegetal growth. The results obtained in the present work agree with results obtained after inoculating these strains in experiments performed in different soil and climatic conditions by Costa et al (2016), Lira Júnior et al (2017, Marinho et al (2017), Batista et al (2017) and Xavier et al (2017).…”

Section: Resultssupporting

confidence: 90%

Productivity and growth in cowpea inoculated with rhizobia under different light environments

et al. 2021

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The objective of this work was to verify the influence of light environments combined with rhizobia inoculation on cowpea growth and productivity. A completely random design was used in a 4x4 factorial scheme, with four light environments, four nitrogen sources and eight replicates in split plot parcels. Light environments were set by means of photo-conversion and thermo-conversion nettings (Aluminet®, red net and black net) and control treatment without shading (full sun). Nitrogen sources were constituted by the strains INPA 03-11B - SEMIA 6462 (Bradyrhizobium elkanni) and UFLA 03-84 - SEMIA 6461 (Bradyrhizobium viridifuturi), and two control treatments: with 70 kg ha-1 of mineral nitrogen and without N. Plant height, indices of chlorophyll a, b and total chlorophill, the number of leaves, number of nodules, dry matter of nodules, dry matter of the aerial portion, dry matter of roots and total dry matter, relative efficiency, gathering of nitrogen in the aerial portion, number, length and matter of pods per plant and dry matter of 100 grains, were evaluated. . There was interaction between light conditions and nitrogen sources for the number of nodules. Individual effect was observed in all other variables. Strain INPA 03-11B was able to promote higher nodulation in cowpea plants in light environments under full sun and Aluminet and the strain UFLA 03-84 only under full sun conditions. However, the efficiency of diazotrophic bacteria to promote vegetative growth, nitrogen gathering and production was not influenced by different light environments. Thus, full sun cultivation is recommended, independently of the nitrogen source used.

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Section: Resultssupporting

confidence: 90%

Productivity and growth in cowpea inoculated with rhizobia under different light environments

et al. 2021

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“…In recent studies, selection of effectiveness and competitiveness of rhizobia have been carried out in several herbaceous legumes in Brazilian semiarid soils, especially peanut (Sizenando et al, 2016), lima bean (Antunes et al, 2011) and cowpea (Xavier et al, 2017). However, few studies were conducted to evaluate the effectiveness of native isolates in nodulation of tree legume (Erythrina velutina Willd.)…”

Section: Introductionmentioning

confidence: 99%

Symbiotic efficiency of native rhizobia in legume tree Leucaena leucocephala derived from several soil classes of Brazilian Northeast region

Silva¹,

Santos²,

Freitas³

et al. 2018

Aust J Crop Sci

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The effective symbiotic activity of rhizobia can contribute increment of biological nitrogen fixation (BNF), which is of great importance in low technology regions. This study aimed to evaluate the symbiotic efficiency of native rhizobia from Brazilian Northeast soils for selection of the most efficient and competitive strains for Leucaena leucocephala plant. The greenhouse test was conducted in factorial scheme (7x3) ). The plants were harvested at 90 days and the following characteristics were determined: plant height, diameter, shoots dry matter, roots dry matter and nodules dry matter, number of nodules, nitrogen concentration and accumulation in shoots, and efficiency of nitrogen fixation. The isolates 36F and 45G are very promising on Biologic Nitrogen Fixation (BNF). They showed high symbiotic efficiency (higher than 90%). These selected strains provided the best characteristics such as plant height (57 and 52 cm), diameter (4.03 and 4.02 mm), dry matter of shoot (3.2 and 3.6 g plant -1) and nitrogen accumulation in shoots (60 and 65 mg plant-1).

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“…Compared to the single inoculation, the co-inoculation of two Bradyrhizobium strains was positively related to the growth, chlorophyll content (Vargas-Díaz et al 2019), and nitrogen accumulation on soybean (de Carvalho et al 2005) but not on cowpea (Xavier et al 2017;Silva Júnior et al 2018). In cowpea, the strains probably compete with each other and occupy the nodulation sites and are efficient in N fixation, whatever the nodule-occupying bacteria.…”

Section: Introductionmentioning

confidence: 94%

“…The inoculation of cowpea rhizobia is a promising technology to improve cowpea production in the Brazilian northeast region (Marinho et al 2014). Isolation and selection of native rhizobia have been reported in the field conditions in Brazilian drylands (Martins et al 2003;Fernandes Júnior et al 2012;Marinho et al 2014Marinho et al , 2017Xavier et al 2017). More recently, the bioprospection of new cowpea rhizobia from the same region indicated the existence of high efficient Bradyrhizobium and Microvirga strains, showing better performance than those officially recommended strains for inoculant production (Oliveira et al 2020;Sena et al 2020).…”

Section: Introductionmentioning

confidence: 99%

“…Among that highly efficient N 2 -fixing and competitive strains, two have been extensively studied by our research group in the last few years: B. yuanmingense BR 3267 native from the semiarid region of Pernambuco state (Martins et al 2003); and B. pachyrhizi BR 3262 isolated from an agroecological production system in Rio de Janeiro state. Both strains are highly efficient in Brazilian drylands (Marinho et al 2014;Xavier et al 2017). Besides its efficiency, BR 3262 strain also presents in vitro the ability to produce auxins (Menezes et al 2016), a remarkable characteristic of plant growth promoter bradyrhizobia (Ferreira et al 2020b).…”

Section: Introductionmentioning

confidence: 99%

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Co-inoculation of two symbiotically efficient Bradyrhizobium strains improves cowpea development better than a single bacterium application

et al. 2020

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The co-inoculation of Bradyrhizobium with other non-bradyrhizobial strains was already assessed on cowpea, but the co-inoculation of two Bradyrhizobium strains was not tested up to now. This study aimed to evaluate the cowpea growth, N accumulation, and Bradyrhizobium competitiveness of the elite strain B. pachyrhizi BR 3262 when co-inoculated with other efficient Bradyrhizobium from the Brazilian semiarid region. Three potted-plant experiments were carried out. In the first assay, 35 efficient Bradyrhizobium isolates obtained from the semiarid region of Brazil were co-inoculated with the elite strains B. pachyrhizi BR 3262. The experiment was conducted in gnotobiotic conditions. The plant growth, nodulation, N nutritional variables, and nodular occupation were assessed. Under gnotobiotic and non-sterile soil conditions, ten selected bacteria plus the elite strain B. yuanmingense BR 3267 were used at the second and third experiments, respectively. The cowpea was inoculated with the 11 bacteria individually or co-inoculated with BR 3262. The plant growth and N nutritional variables were assessed. A double-layer medium spot method experiment was conducted to evaluate the interaction among the co-inoculated strains in standard and diluted YMA media. The co-inoculation treatments showed the best efficiency when compared to the treatments inoculated solely with BR 3262. This strain occupied a low amount of cowpea nodules ranging from 5 to 67.5%. The treatments with lower BR 3262 nodule occupancy showed the best results for the shoot nitrogen accumulation. The culture experiment showed that four bacteria inhibited the growth of BR 3262. In contrast, seven strains from the soils of Brazilian semiarid region were benefited by the previous inoculation of this strain. In the second and third experiments, the results indicated that all 11 co-inoculated treatments were more efficient than the single inoculation, proofing the best performance of the dual inoculation of Bradyrhizobium on cowpea.

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Agronomic effectiveness of rhizobia strains on cowpea in two consecutive years

Cited by 11 publications

References 14 publications

Productivity and growth in cowpea inoculated with rhizobia under different light environments

Productivity and growth in cowpea inoculated with rhizobia under different light environments

Symbiotic efficiency of native rhizobia in legume tree Leucaena leucocephala derived from several soil classes of Brazilian Northeast region

Co-inoculation of two symbiotically efficient Bradyrhizobium strains improves cowpea development better than a single bacterium application

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