Agronomic efficiency of Bradyrhizobium in peanut under different environments in Brazilian Northeast

Sizenando, Ciro Igor Torres; Ramos, Jean Pierre Cordeiro; Fernandes‐Júnior, Paulo Ivan; Lima, Liziane Maria de; Freire, R. M. M.; Santos, Roseane Cavalcanti dos

doi:10.5897/ajar2016.11294

Cited by 9 publications

(4 citation statements)

References 13 publications

(11 reference statements)

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“…These positive effects were observed in the physiological traits evaluated in the present study, indicating that the inoculation of ESA 123 and SEMIA 6144 can benefit the peanuts by other plant growth promoting mechanisms, in addition to BNF, what is important to strain selection for drylands, as the Brazilian semi-arid region. The agronomic efficiency of ESA 123 was already showed in rain-fed field conditions of Brazilian semi-arid (Sizenando et al 2016). The data obtained in the present study indicated that the high field performance of this bradyrhizobia can be achieved due its higher N fixation ability in addition to the bacterium influence to increase the drought tolerance of peanut plants.…”

Section: Discussionsupporting

confidence: 53%

“…The rhizobia inoculation reduced the effects of drought in the peanut plants in the present study. Combining the results of lower reduction of leaf gas exchanges, proline accumulation and reduction of SOD and APX enzymes, the average higher plant development and N accumulation, along with the agronomic efficiency previously evaluated by Sizenando et al (2016), it is possible to point out the Fig. 2 Net photosynthesis (A) (a), stomatal conductance (gs) (b) and transpiration (E) (c) on leaves of peanut plants submitted to water deficit and inoculated with two strains of Bradyrhizobium.…”

Section: Discussionmentioning

confidence: 92%

“…Peanut is able to associate efficiently with different rhizobial strains (Melo et al 2016), presenting higher efficiency the Bradyrhizobium genus (Valetti et al 2016;Santos et al 2017a). During the last years, some studies have been carried out in Brazil aiming to evaluate the biodiversity (Lyra et al 2013;Torres-Júnior et al 2014;Santos et al 2017a), the symbiotic efficiency (Torres-Júnior et al 2014;Santos et al 2017a, b), and the agronomic efficiency of new rhizobium strains (Sizenando et al 2016). However, the potential of these bacteria to reduce the abiotic stresses, as water deficit, for example, has not been investigated.…”

Section: Introductionmentioning

confidence: 99%

“…The ESA 123 strain of Bradyrhizobium sp., native from a soil in the municipality of Barbalha (Ceará, Brazil), has already been indicated as a bacterium with high symbiotic efficiency (Santos et al 2017a) and agronomic efficiency in different sites of the Brazilian semi-arid region (Sizenando et al 2016). This strain may present certain drought tolerance since it is from a dry region and is efficient in fixing N in association with peanut.…”

Section: Introductionmentioning

confidence: 99%

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Can Bradyrhizobium strains inoculation reduce water deficit effects on peanuts?

Barbosa

Brito

Fernandes

et al. 2018

World J Microbiol Biotechnol

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Drought is one of the environmental factors that most affects peanut cultivation in semi-arid regions, resulting in economic losses to growers. However, growth promoting bacteria are able to reduce water deficit damage in some plant species. In this context, this study aimed to evaluate the interaction of Bradyrhizobium strains reducing water stress effects on peanut genotypes by antioxidant enzymes activities, leaf gas exchanges and vegetative growth, as well as to determine the taxonomic positioning of strain ESA 123. The 16S rRNA gene of ESA 123 was amplified by PCR and sequenced by dideoxy Sanger sequencing method. An experiment was performed in greenhouse with three peanut genotypes (BRS Havana, CNPA 76 AM and 2012-4), two Bradyrhizobium strains (SEMIA 6144 and ESA 123), a mineral source of N and an absolute control (without N) under two water regimes (with and without irrigation). Seeds of peanut were sown and the plants were grown until 30 days after emergence. On the 20th day, the water deficit plants group had their irrigation suspended for 10 days. At in silico analyzes, ESA 123 presented 98.97% similarity with the type strain of B. kavangense. Leaf gas exchange was affected by water deficit; as well as alteration of antioxidant activities and reduction of vegetative growth variables. However, some plants inoculated with SEMIA 6144 and ESA 123 strains presented lower reductions and increment of some evaluated variables, mainly the ones inoculated with the ESA 123 strain, Bradyrhizobium sp. from the semi-arid region of Northeast Brazil. This data suggests beneficial effects of the peanut-Bradyrhizobium interaction in a water stress condition, specially with the ESA 123 strain.

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Section: Discussionsupporting

confidence: 53%

Section: Discussionmentioning

confidence: 92%