Leaf Photosynthetic Metabolism and N2 Fixation at the Flowering Stage in Three Genotypes of Cowpea [Vigna unguiculata (L.) Walp.]

Oliveira, Marciel T.; Benko‐Iseppon, Ana Maria; Kido, Éderson Akio; Santos, Mariana

doi:10.5539/jas.v4n2p245

Cited by 4 publications

(4 citation statements)

References 42 publications

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“…According to the authors, rhizobial symbiosis stimulated photosynthesis due to the removal of photosynthates sink limitation by the nodule activity. Oliveira et al (2012) also observed the same results to cowpea, where plants inoculated with a commercial rhizobia strain showed more efficiency on gas exchanges than the control plants. Also, in the present study, peanut presented a better gas exchange behavior when inoculated with SEMIA 6144.…”

Section: Nodulation and Agronomical Traitssupporting

confidence: 70%

Nodulation, gas exchanges and production of peanut cultivated with Bradyrhizobium in soils with different textures

et al. 2016

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Nitrogen fertilization from biological source is an uncommon practice for peanut growers due to the limited results, mainly in environments with water restriction. In this study, the response of a commercial Bradyrhizobium was evaluated on the nodulation and production of peanuts grown in sandy and medium textured soils. Two experiments using different soils were carried out in the field during the dry season, in Campina Grande, Paraíba State, Brazil. Three peanut genotypes were submitted to the following treatments: 1-no nitrogen fertilization (control), 2- chemical fertilization (ammonium sulfate) and 3- inoculation with Bradyrhizobium [commercial strain BR 1405 (SEMIA 6144)]. A completely randomized 3x3 factorial design was adopted with five repetitions for both experiments. The evaluates variables were: height of the main stem, number of nodes/plant, root length, root dry weight, weight of pods/plant and number of pods/plant. In addition, gas exchanges were estimated using IRGA apparatus. Both genotypes (BRS Havana and L7 Bege) were benefited in relation to production due to an inoculation with SEMIA 6144. No physiological response was verified in genotypes or N-treatments to gas exchange, excepting for the Ci/Ca ratio in the medium textured soil experiment. BRS Havana showed low Ci/Ca ratio in Bradyrhizobium treatment, indicating that SEMIA 6144 improved the plants photosynthetic efficiency.

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Section: Nodulation and Agronomical Traitssupporting

confidence: 70%

Nodulation, gas exchanges and production of peanut cultivated with Bradyrhizobium in soils with different textures

et al. 2016

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“…One potential strategy to reduce the effects of abiotic stress in peanuts is the biological interaction with rhizobia strains. This interaction may result in the selection of promising macro and micro-symbiont associations, as already shown for cowpea (Oliveira et al 2012) and common beans (Suárez et al 2008).…”

Section: Introductionmentioning

confidence: 67%

“…Higher N content in plants with full water supply, compared to those subjected to water deficit, indicated that in the period of low water availability, the activity of the nodules on nitrogen fixation was reduced or completely stopped. But the inoculation of rhizobia results in other benefits for the hosts, besides the N fixation (Suárez et al 2008;Oliveira et al 2012). 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.…”

Section: Discussionmentioning

confidence: 99%

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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“…The use of rhizobia, bacteria that induce the development of root and/or stem nodules in legumes, has been an alternative to optimize agricultural production through a reduced need for nitrogen fertilizers. In addition to nitrogen fixation, the rhizobium-legume interaction may contribute to host resistance to abiotic stresses such as drought, as has been demonstrated for tropical legumes such as cowpea (Oliveira et al, 2012) and peanut (Melo et al, 2016;Barbosa et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Research Article <i>Bradyrhizobium</i> spp. as attenuators of water deficit stress in runner peanut genotypes based on physiological and gene expression responses

Brito¹,

Santos²,

Barbosa³

et al. 2019

Genet. Mol. Res.

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The peanut plant has high plasticity and great adaptability to adverse conditions, including drought. To mitigate the negative effects of drought on legumes, nitrogen-fixing microorganisms have been investigated in some plant species, such as soybeans and beans. We analyzed the role Bradyrhizobium strains in peanut genotypes subjected to water deficit by means of plant growth, physiological and gene expression analysis. The research was conducted under greenhouse conditions with the runner peanut genotypes (IAC Runner 886, 2012-33 and 2012-47) and two Bradyrhizobium strains (ESA 123 and SEMIA 6144). After 20 days of germination, the water supply was completely interrupted and gas exchange analysis were carried out using an infrared gas analyzer, up to the 10 th day of stress. Leaves were collected for the analysis of proline content and the expression of NCED and ERF8 genes. Analyses of plant height (PH), shoot dry mass (SDM), root dry mass (RDM), number of nodules (NN) and nodule weight (NW) also were ©FUNPEC-RP www.funpecrp.com.br Genetics and Molecular Research 18 (4): gmr18379 S.L. Brito et al. 2 performed. The peanut shoots inoculated with the Bradyrhizobium strains obtained the best results. The genotypes inoculated with the ESA 123 strain obtained superior responses compared to the nonstressed treatment inoculated with the same bacteria and the stressed control without bacterial inoculation. In the ESA 123 inoculated treatments, the water stressed plants had higher RDM (28.5% higher, on average), NN (two fold higher), and gene expression (approximately six and threefold higher for ERF8 and NCED genes, respectively). The increase in the expression of NCED and ERF8 genes, in the three genotypes inoculated with ESA 123, suggests a key role of this inoculant in the activation of metabolic cascades for plant protection under water deficit.

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Leaf Photosynthetic Metabolism and N2 Fixation at the Flowering Stage in Three Genotypes of Cowpea [Vigna unguiculata (L.) Walp.]

Cited by 4 publications

References 42 publications

Nodulation, gas exchanges and production of peanut cultivated with Bradyrhizobium in soils with different textures

Nodulation, gas exchanges and production of peanut cultivated with Bradyrhizobium in soils with different textures

Can Bradyrhizobium strains inoculation reduce water deficit effects on peanuts?

Research Article <i>Bradyrhizobium</i> spp. as attenuators of water deficit stress in runner peanut genotypes based on physiological and gene expression responses

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