Efficient Nitrogen-Fixing Bacteria Isolated from Soybean Nodules in the Semi-arid Region of Northeast Brazil are Classified as Bradyrhizobium brasilense (Symbiovar Sojae)

Costa, Elaine Martins da; Ribeiro, Paula Rose Almeida; Carvalho, Teotônio Soares de; Vicentin, Rayssa Pereira; Balsanelli, Eduardo; Souza, Emanuel Maltempi de; Lebbe, Luc; Willems, Anne; Moreira, Fátima Maria de Souza

doi:10.1007/s00284-020-01993-6

Cited by 8 publications

(6 citation statements)

References 51 publications

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“…Soybeans are considered a minor crop in Thailand's vast agricultural production systems. Due to their ability to fixate nitrogen from the specific rhizobia bacteria in the soybean's root nodule, soybeans are suitable for growth in rotational or intercropping systems, which contribute to increased farmer income and improved soil health [19,20]. Thailand's two production seasons involve the common practice of planting soybeans in the wet season in the undulating topography of upland areas and the dry season in the lowland paddy fields.…”

Section: Discussionmentioning

confidence: 99%

Identification of Superior Soybean Cultivars through the Indication of Specific Adaptabilities within Duo-Environments for Year-Round Soybean Production in Northeast Thailand

et al. 2021

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The soybean (Glycine max (L.) Merrill) is one of the world’s most important sources of food, feed, and fuel due to its high protein value and oil content. However, there exists a lack of soybean genotypes suitable for growth in diverse conditions as soybean breeders have developed their own varieties for specific purposes within their own unique environments. This, therefore, creates the need for soybean genotypes for different environments. The objectives of the experiment described herein were to determine the genotype magnitude through the environment interaction (GxE) of new soybean breeding lines, thereby identifying widely and/or specifically adapted genotypes under ten of Northeast Thailand’s typical environmental conditions from 2017 to 2019. Analyses of the environment (E) and GxE captured a large portion of the total sum of squares of grain yield and related traits, which demonstrated the influence of the two factors in evaluating soybean genotypes, thereby identifying the need for response analysis to identify superior genotypes in each environment. Based on the grain yields of three environments, four genotype groups were clustered. Within the high grain yield environment (EG1), we identified five genotypes with higher yield performance (35*sj-32 (3356 kg/ha), 38D*a-16 (3138 kg/ha), 42*Ly-50-2 (3122 kg/ha), 35*Lh-7 (3116 kg/ha), and 223*Lh-85 (3073 kg/ha)) of KK (3132 kg/ha), the recommended soybean variety for Northeast Thailand, than that of the CM60 (2606 kg/ha). These five top-yielding genotypes, however, produced unstable grain yields through varied environments as they were each narrowly adapted to a specific environment. Moreover, those genotypes may be grown within a rotational cropping system in a duo-environment (wet and dry season) of soybean production in Thailand’s northeast region.

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Section: Discussionmentioning

confidence: 99%

Identification of Superior Soybean Cultivars through the Indication of Specific Adaptabilities within Duo-Environments for Year-Round Soybean Production in Northeast Thailand

et al. 2021

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“…The wide functional variability in symbiotic efficiency of the strains evaluated in both species studied (acacia and velvet bean) demonstrates the high symbiotic diversity of the Bradyrhizobium genus. We emphasize that these strains belong to different phylogenetic groups, as characterized by housekeeping gene sequencing (Guimarães et al 2012; Ribeiro et al 2015), and 12 of the strains were classified at species level, including B. brasilense (Costa et al 2017(Costa et al , 2020, B. forestalis (Costa et al 2018), B. viridifuturi (Costa et al 2019), and B. uaiense (Michel et al 2020). In addition, variability was found in symbiotic efficiency even among strains of the same phylogenetic group and/or species.…”

Section: Discussionmentioning

confidence: 99%

“…These strains originated from soils of the Brazilian ecosystems and they have been characterized by housekeeping gene sequencing (Guimarães et al 2015;Ribeiro et al 2015), which indicate that they belong to different phylogenetic groups. Recent studies have classified 13 of these strains at species level, including B. brasilense (Costa et al 2017(Costa et al , 2020, B. forestalis (Costa et al 2018), B. viridifuturi (Costa et al 2019), B. uaiense (Michel et al 2020, and B. stylosanthis (Michel et al unpublished data) (Table 1). Their symbiotic efficiencies have already been evaluated in previous studies with legume species other than those evaluated in this study (Table 1).…”

Section: Strains Evaluatedmentioning

confidence: 99%

“…The strains that exhibited lower growth under the extreme pH and temperature conditions compared to the optimal conditions (pH 6.8 and 28°C) were considered as having weak growth (w). The other 12 strains (UFLA03-320, UFLA03-321 T , UFLA03-290, UFLA04-0212, INPA54B T , INPA86A, UFLA03-164 T , UFLA03-153, UFLA03-84, UFLA03-144, INPA237B, and UFLA06-13) were evaluated in previous studies (Costa et al 2017(Costa et al , 2018(Costa et al , 2019(Costa et al , 2020Michel et al 2020) with the same methodology described above.…”

Section: Tolerance Of the Strains To Different Ph And Temperature Conditionsmentioning

confidence: 99%

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Acid and high-temperature tolerant Bradyrhizobium spp. strains from Brazilian soils are able to promote Acacia mangium and Stizolobium aterrimum growth

et al. 2020

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In selection of rhizobia, it is important to consider tolerance of the strain to adverse conditions, as well as its symbiotic efficiency and capacity to perform other plant growth-promoting processes. In this study, we evaluated Bradyrhizobium spp. strains from Brazilian soils regarding tolerance to different pH and temperature conditions, inorganic calcium phosphate solubilization capacity, and symbiotic efficiency when inoculated on acacia (Acacia mangium) and velvet bean (Stizolobium aterrimum) in axenic conditions. In each experiment of symbiotic efficiency, 18 strains (including representatives of Bradyrhizobium sp., B. viridifuturi, B. brasilense, B. uaiense, B. stylosanthis, and B. forestalis) were compared to two uninoculated controls, one with low (5.25 mg L −1 ) and another with high (52.5 mg L −1 ) concentrations of mineral nitrogen (N), and one inoculant strain [BR 3617 (B. japonicum) in the acacia experiment and BR 2811(B. elkanii) in the velvet bean experiment]. All strains grew at the different pH values tested (4 to 10) and tolerated a wide temperature range (15 to 37°C) and most of them solubilized inorganic calcium phosphate. Most strains did not nodulate acacia, but were able to promote growth of this species. The UFLA03-268 (Bradyrhizobium sp.) strain was the most efficient in symbiosis with acacia. In the velvet bean experiment, the UFLA03-144 (B. viridifuturi), INPA104A (Bradyrhizobium sp.), and UFLA03-321 T (B. brasilense) strains outperformed the other treatments in shoot dry matter production of velvet bean, showing high potential for use as inoculants in this species. Strains representing the five Bradyrhizobium species and Bradyrhizobium sp. were similar or more efficient in shoot nitrogen accumulation (SNA) than the control with mineral N. They also led to 84 (UFLA 04-0212) to 246 (INPA 104A) % increases in SNA compared to inoculation with BR 2811. This study showed an efficient symbiotic relationship between B. viridifuturi, B. brasilense, B. uaiense, B. stylosanthis and B. forestalis and velvet bean.

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“…However, recently, strains isolated from soybean nodules in the state of Piauí (Cerrado biome) were found to be efficient for fixing nitrogen in symbiosis with soybeans during experiments conducted under axenic conditions (Ribeiro et al, 2015). Some of these strains were classified as Bradyrhizobium brasilense (symbiovar sojae) (Costa et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Bradyrhizobium brasilense as an efficient soybean microsymbiont in two contrasting soils of the southwestern region of Piauí (Cerrado biome)

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Costa

et al. 2021

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The goal of this study was to evaluate the efficiency of Bradyrhizobium brasilense strains native to the soil of the semiarid region in northeastern Brazil in symbiosis with soybeans in two contrasting soils in southwestern Piauí. A pot experiment was conducted using a randomized block design in a 10 × 2 factorial scheme. There were 10 nitrogen (N) sources: six native Bradyrhizobium strains [UFLA06-13, UFLA06-15, UFLA06-19, UFLA06-21, UFLA06-22 (B. brasilense), and UFLA06-24 (Bradyrhizobium sp.)], two controls with strain SEMIA 5019 (B. elkanii) and a commercial inoculant [SEMIA 5079 (B. japonicum) + SEMIA 5080 (B. diazoefficiens)] recommended for soybeans, and two controls without the application of an inoculant (one with and the other without the application of mineral N). The second experimental factor corresponded to the use of two soils (Oxisol and Quartzarenic Neosol). All strains showed increased nodulation and shoot nitrogen content in soybean plants in both soils. Most strains promoted higher nitrogen fixation when inoculated in the Oxisol. UFLA06-19, UFLA06-22, and UFLA06-24 were efficient in nitrogen accumulation in the shoots of soybeans in the Oxisol. This is the first report regarding the efficiency of B. brasilense strains in symbiosis with soybeans under different soil conditions.

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Efficient Nitrogen-Fixing Bacteria Isolated from Soybean Nodules in the Semi-arid Region of Northeast Brazil are Classified as Bradyrhizobium brasilense (Symbiovar Sojae)

Cited by 8 publications

References 51 publications

Identification of Superior Soybean Cultivars through the Indication of Specific Adaptabilities within Duo-Environments for Year-Round Soybean Production in Northeast Thailand

Identification of Superior Soybean Cultivars through the Indication of Specific Adaptabilities within Duo-Environments for Year-Round Soybean Production in Northeast Thailand

Acid and high-temperature tolerant Bradyrhizobium spp. strains from Brazilian soils are able to promote Acacia mangium and Stizolobium aterrimum growth

Bradyrhizobium brasilense as an efficient soybean microsymbiont in two contrasting soils of the southwestern region of Piauí (Cerrado biome)

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