Co-Inoculation of Soybean with Bradyrhizobium and Azospirillum Promotes Early Nodulation
By A. M. Chibeba, M. F. Guimarães, O. R. Brito, M. Nogueira, R. Araujo, M. Hungria. 2015
97 citations recorded by the source corpus.
Soybean inoculation with elite strains of Bradyrhizobium to improve nodulation, N2 fixation, and grain yield is well established worldwide. However, when grown in soils where N is deficient, soy- bean undergoes an initial phase of N starvation that may last up to 20 days after seedling germina- tion due to the lack of synchronism between the phase when seed N reserves are exhausted and the moment when plants begin to benefit from the nitrogen fixed by the bacteria. Practices that promote early nodulation may play a key role in reducing the N starvation period. Azospirillum is a plant growth promoting rhizobacteria (PGPR) that can stimulate root hair formation and root growth, creating more sites for early root infection and nodule formation by N2-fixing Bradyrhizo- bium spp. In this study, the effects of co-inoculating soybeans with Bradyrhizobium spp. and Azos- pirillum brasilense on nodulation precocity and N2 fixation were evaluated under greenhouse and field conditions. Nodule number and dry weight, as well as plant and root dry weight and N accu- mulated in shoots at 15, 18, 21, 24 and 30 days after emergence (DAE) were evaluated in response to inoculation with Bradyrhizobium spp. alone or when co-inoculated with Azospirillum sp. In the greenhouse, co-inoculated plants nodulated precociously as indicated by a significant increase (p < 0.05) in nodule biomass observed at (include) 21 DAE. More pronounced effects of co-inocula- tion were observed in the field as early as 18 DAE, suggesting that the presence of Azospirillum helps plants to overcome environmental stresses. * Corresponding author.
Subfields: Agronomy and Crop Science, Plant Science
View Paper: https://www.semanticscholar.org/paper/5eeebb6a5e5f4f776abe33d39746d4e42964045d
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Citations in the corpus
- Changes in root morphological traits in soybean co-inoculated with Bradyrhizobium spp. and Azospirillum brasilense or treated with A. brasilense exudates (2020, background): “Similar increases in nodulation have been attributed to the co-inoculation with Azospirillum in soybean (Molla et al. 2001a, 2001b; Hungria et al. 2013, 2015; Chibeba et al. 2015; Rego et al. 2018; Puente et al. 2019).”
- Outstanding impact of Azospirillum brasilense strains Ab-V5 and Ab-V6 on the Brazilian agriculture: Lessons that farmers are receptive to adopt new microbial inoculants (2021, background): “Furthermore, by improvements in the root system, Ab-V5 and Ab-V6 may promote early nodulation, as shown for the soybean (Chibeba et al., 2015; Cerezini et al., 2016).”