scholarly journals BIOLOGICAL NITROGEN FIXATION STABILITY OF COWPEA CULTIVARS WITH TROPICAL SEMI-ARID RHIZOBIAL STRAINS

2021 ◽  
Vol 34 (2) ◽  
pp. 359-369
Author(s):  
AMANDA CORDEIRO DE MELO SOUZA ◽  
THIAGO PONTES LIRA ◽  
ANTONIO FÉLIX DA COSTA ◽  
FELIPE JOSÉ CURY FRACETTO ◽  
GISELLE GOMES MONTEIRO FRACETTO ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Biological Nitrogen Fixation ◽  
Dry Matter ◽  
Block Design ◽  
Nitrogen Accumulation ◽  
Arid Soils ◽  
Cowpea Cultivars ◽  
Nodule Number ◽  
Biological Nitrogen ◽  
Semi Arid

ABSTRACT Cowpeas (Vigna unguiculata L. Walp) are an economically and socially important legume in northern and north-eastern Brazil and can establish effective symbiosis with nitrogen-fixing bacteria. We evaluated the symbiotic compatibility and efficiency of rhizobial strains from Pernambuco semi-arid soils and determined their symbiotic stability on the IPA-206, BR 17-Gurguéia, and BRS Novaera cultivars, selected for different environments. The experiment was conducted in a greenhouse to evaluate a 3 × 28 factorial arrangement (cultivars selected for different environments × inoculation with the currently recommended strain, uninoculated plants with or without mineral nitrogen, and 25 rhizobial strains from semi-arid soils) in a randomized block design with four replicates. We determined nodule number, shoot and root dry matter, nodule dry matter by nodule number, nitrogen accumulated in the shoot by nodule dry matter, nitrogen content and accumulation in the shoot, relative efficiency of the recommended strain based on nitrogen accumulation, and shoot dry matter. Overall, the cultivars responded differently to different strains and cultivar biological nitrogen fixation potential. Strains G7.85 and BR 3262 showed potential for biological nitrogen fixation. BR 3262 was confirmed to be adequate for inoculation of different cowpea cultivars.

Yield and biological nitrogen fixation of cowpea varieties in the semi-arid region of Brazil

2012 ◽  
Vol 45 ◽  
pp. 109-114 ◽  
Author(s):  
Ana Dolores Santiago de Freitas ◽  
Acácia Fernandes Silva ◽  
Everardo Valadares de Sá Barretto Sampaio
Keyword(s):  
Nitrogen Fixation ◽  
Biological Nitrogen Fixation ◽  
Arid Region ◽  
Cowpea Varieties ◽  
Semi Arid Region ◽  
Biological Nitrogen ◽  
Semi Arid

scholarly journals Multivariate analysis and determination of the best indirect selection criteria to genetic improvement the biological nitrogen fixation ability in common bean genotypes (Phaseolus vulgaris L.)

Genetika ◽  
2012 ◽  
Vol 44 (2) ◽  
pp. 279-284 ◽  
Author(s):  
Reza Golparvar
Keyword(s):  
Nitrogen Fixation ◽  
Common Bean ◽  
Biological Nitrogen Fixation ◽  
Genetic Improvement ◽  
Selection Criteria ◽  
Block Design ◽  
Indirect Selection ◽  
Shoot Number ◽  
Biological Yield ◽  
Biological Nitrogen

In order to determine the best indirect selection criteria for genetic improvement of biological nitrogen fixation, sixty four common bean genotypes were cultivated in two randomized complete block design. Genotypes were inoculated with bacteria Rhizobium legominosarum biovar Phaseoli isolate L-109 only in one of the experiments. The second experiment was considered as check for the first. Correlation analysis showed positive and highly significant correlation of majority of the traits with percent of nitrogen fixation. Step-wise regression designated that traits percent of total nitrogen of shoot, number of nodule per plant and biological yield accounted for 92.3 percent of variation exist in percent of nitrogen fixation. Path analysis indicated that these traits have direct and positive effect on percent of nitrogen fixation. Hence, these traits are promising indirect selection criteria for genetic improvement of nitrogen fixation capability in common bean genotypes especially in early generations.

Contribution of biological nitrogen fixation to cowpea: a strategy for improving grain yield in the semi-arid region of Brazil

2003 ◽  
Vol 38 (6) ◽  
pp. 333-339 ◽  
Author(s):  
L. M. V. Martins ◽  
G. R. Xavier ◽  
F. W. Rangel ◽  
J. R. A. Ribeiro ◽  
M. C. P. Neves ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Grain Yield ◽  
Biological Nitrogen Fixation ◽  
Arid Region ◽  
Semi Arid Region ◽  
Biological Nitrogen ◽  
Semi Arid

scholarly journals Biological nitrogen fixation and urea-N recovery in 'Coastcross-1' pasture treated with Azospirillum brasilense

2020 ◽  
Vol 55 ◽  
Author(s):  
Priscila Flôres Aguirre ◽  
Sandro José Giacomini ◽  
Clair Jorge Olivo ◽  
Vinicius Felipe Bratz ◽  
Maurício Pase Quatrin ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Biological Nitrogen Fixation ◽  
Azospirillum Brasilense ◽  
Dry Matter ◽  
N Fertilizer ◽  
Forage Yield ◽  
N Recovery ◽  
15N Recovery ◽  
Forage Grass ◽  
Biological Nitrogen

Abstract: The objective of this work was to quantify the inoculation effect of Azospirillum brasilense (Ab-V5 and Ab-V6 strains) on the forage yield, biological nitrogen fixation (BNF), and urea-15N recovery of the forage grass 'Coastcross-1'. The experiment was carried out in a 2 (with or without inoculation) × 2 (without N fertilizer and with 100 kg ha-1 N per year as urea) × 7 (cuts) factorial arrangement. The natural 15N abundance method was used to determine BNF; to determine urea-N recovery, 15N-labeled urea was applied in microplots. Forage yield was higher in grasses subjected to inoculation, with 7.4 Mg ha-1 dry matter per year, for the treatment without N fertilizer, and 8.0 Mg ha-1 dry matter per year for the treatment with 100 kg ha-1 N per year, respectively, which shows an additive effect of inoculation and N fertilization. The contribution of BNF was 23.0 and 53.8 kg ha-1 per year for the unfertilized treatment, both in uninoculated and inoculated plants, respectively. Urea-15N recovery was 13.7 and 16.5 kg ha-1 per year for uninoculated and inoculated treatments, respectively, corresponding to 13.7 and 16.5% of the urea-N applied. Inoculation with A. brasilense increases forage yield and the contribution of BNF to grass nutrition with N, as well as urea-N recovery by the forage grass.

scholarly journals Symbiosis of selected Rhizobium leguminosarum bv. viciae strains with diverse pea genotypes: effects on biological nitrogen fixation

2017 ◽  
Vol 63 (11) ◽  
pp. 909-919 ◽  
Author(s):  
Chao Yang ◽  
Rosalind Bueckert ◽  
Jeff Schoenau ◽  
Axel Diederichsen ◽  
Hossein Zakeri ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Biological Nitrogen Fixation ◽  
Rhizobium Leguminosarum ◽  
Lateral Roots ◽  
Breeding Lines ◽  
Nodule Number ◽  
Pea Mutant ◽  
Greenhouse Assay ◽  
Root Tissues ◽  
Biological Nitrogen

Biological nitrogen fixation (BNF) can be improved by optimizing the interaction between the rhizobial inoculant and pea (Pisum sativum L.), leading to increased productivity and reduced nitrogen (N) fertilizer use. Eight Rhizobium leguminosarum bv. viciae strains were used to inoculate the super-nodulating pea mutant Rondo-nod3 (fix+), the hyper-nodulating pea mutant Frisson P88 Sym29, CDC Meadow commercial control, and the non-nodulating mutant Frisson P56 (nod–) to evaluate BNF in a greenhouse assay. Significant differences in strain × cultivar interactions were detected for shoot and root dry masses, which ranged from 1.8 to 4.7 g and from 0.27 to 0.73 g per plant, respectively; for nodule number on lateral roots, which ranged from 25 to 430 per plant; for amount of fixed N2, which ranged from 15 to 67 mg and from 4 to 15 mg per plant for shoot and root tissues, respectively; and for percentage of N derived from atmosphere (%Ndfa), which ranged from 37% to 61% and from 35% to 65% for shoot and root tissue, respectively. Strain × cultivar interactions in this study could contribute to identification of superior strains and pea breeding lines with genetic superiority in BNF. Nodule production in pea plants was not necessarily correlated with the amount of fixed N2, suggesting nodule activity is more important to BNF than is nodule number.

Biological nitrogen fixation and nitrogen and phosphorus budgets in farmer-managed intercrops of maize–pigeonpea in semi-arid southern and eastern Africa

2007 ◽  
Vol 295 (1-2) ◽  
pp. 127-136 ◽  
Author(s):  
Joseph J. Adu-Gyamfi ◽  
Fidelis A. Myaka ◽  
Webster D. Sakala ◽  
Rie Odgaard ◽  
Jens M. Vesterager ◽  
...  
Keyword(s):  
Nitrogen Fixation ◽  
Biological Nitrogen Fixation ◽  
Eastern Africa ◽  
Nitrogen And Phosphorus ◽  
Phosphorus Budgets ◽  
Biological Nitrogen ◽  
Semi Arid
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