Rhizobial Inoculation, Alone or Coinoculated with Azospirillum brasilense, Promotes Growth of Wetland Rice

Hahn, Leandro; Sá, Enílson Luiz Saccol de; Osório, Benjamin Dias; Machado, Rafael Goulart; Damasceno, Raquel Garibaldi; Giongo, Adriana

doi:10.1590/18069657rbcs20160006

Cited by 18 publications

(10 citation statements)

References 39 publications

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“…It has been demonstrated that, in wheat plants, isolates of Azospirilum obtained from this same plant species were more efficient than those isolated from plants of different species (Baldani et al, 1986). In other poaceae, such as corn (Salamone et al, 1996) and rice (Hahn et al, 2016), the effect of genotype on the interaction with bacteria has also been demonstrated.…”

Section: Resultsmentioning

confidence: 97%

Wheat cultivars submitted to seed inoculation with Azospirillum brasilense and nitrogen application in different environments

Feldmann¹,

Bredemeier²,

Hahn³

et al. 2018

Científica

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The response of wheat to seed inoculation with Azospirillum brasilense is variable, depending on factors related to the interaction of the bacterium with the genotype, growing environment and nitrogen availability. The objective of this work was to evaluate the response of wheat cultivars to seed inoculation with two strains of A. brasilense (Ab-V5 and Ab-V6) and to application of nitrogen (N) doses in two environments. The experiments were conducted under field conditions in Eldorado do Sul (RS) and Itapiranga (SC), in the 2012 and 2013 growing seasons, under a randomized block design, in a 3 x 2 x 3 factorial arrangement, with three N doses (0, 50 and 100 kg ha -1 ), with and without seed inoculation with A. brasilense, and three wheat cultivars (Mirante, Quartzo and TBIO Pioneiro). Nitrogen application increased wheat growth and grain yield, mainly in Eldorado do Sul (RS), where the soil of the experimental site shows lower fertility levels. Wheat seeds inoculation with two strains of A. brasilense showed variable responses in the growth and grain yield according to the cultivar, growing season and experimental site. Positive responses to seed inoculation were more consistent for the cultivar Mirante, in Eldorado do Sul (RS).Additional keywords: diazotrophic bacteria; plant growth-promoting bacteria; Triticum aestivum. ResumoA resposta à inoculação de sementes de trigo com Azospirillum brasilense é variável, dependendo de fatores relacionados à interação da bactéria com o genótipo, o ambiente de cultivo e a disponibilidade de nitrogênio. O objetivo deste trabalho foi avaliar a resposta de cultivares de trigo à inoculação das sementes com duas cepas de A. brasilense (Ab-V5 e Ab-V6) e à aplicação de doses de nitrogênio (N) em dois ambientes de cultivo. Os experimentos foram conduzidos a campo, nos municípios de Eldorado do Sul (RS) e Itapiranga (SC), nas safras de 2012 e 2013, sob o delineamento em blocos casualizados, em arranjo fatorial 3 x 2 x 3, sendo três doses de N (0; 50 e 100 kg ha -1 ), com e sem uso da inoculação das sementes com A. brasilense, e três cultivares de trigo (Mirante, Quartzo e TBIO Pioneiro). A aplicação de nitrogênio aumentou o crescimento e no rendimento de grãos do trigo, principalmente em Eldorado do Sul (RS), onde o solo da área experimental apresenta menores níveis de fertilidade. A inoculação das sementes de trigo com as duas cepas de A. brasilense apresentou respostas variáveis no crescimento e rendimento de grãos de acordo com a cultivar, o ano e o local de condução dos trabalhos. Respostas positivas à inoculação foram mais consistentes, na cultivar Mirante, em Eldorado do Sul (RS).Palavras-chave adicionais: bactéria diazotrófica; bactérias promotoras de crescimento vegetal; Triticum aestivum.

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Section: Resultsmentioning

confidence: 97%

Wheat cultivars submitted to seed inoculation with Azospirillum brasilense and nitrogen application in different environments

Feldmann¹,

Bredemeier²,

Hahn³

et al. 2018

Científica

Self Cite

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“…Puente et al [ 9 ] found that the foliar inoculation of Azospirillum brasilense Az39 increased the number and biomass of root nodules produced by Bradyrhizobium japonicum E.109 in soybean plants. This positive interaction has mainly been observed between Azospirillum and nodule-forming rhizobia [ 10 , 11 ] and has been reported to improve the response of soybean plants to drought [ 12 ] and of maize plants to salinity stress [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Potential of Herbaspirillum and Azospirillum Consortium to Promote Growth of Perennial Ryegrass under Water Deficit

et al. 2021

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Plant growth-promoting bacteria (PGPB) can mitigate the effect of abiotic stresses on plant growth and development; however, the degree of plant response is host-specific. The present study aimed to assess the growth-promoting effect of Herbaspirillum (AP21, AP02), Azospirillum (D7), and Pseudomonas (N7) strains (single and co-inoculated) in perennial ryegrass plants subjected to drought. The plants were grown under controlled conditions and subjected to water deficit for 10 days. A significant increase of approximately 30% in dry biomass production was observed using three co-inoculation combinations (p < 0.01). Genomic analysis enabled the detection of representative genes associated with plant colonization and growth promotion. In vitro tests revealed that all the strains could produce indolic compounds and exopolysaccharides and suggested that they could promote plant growth via volatile organic compounds. Co-inoculations mostly decreased the in vitro-tested growth-promoting traits; however, the co-inoculation of Herbaspirillum sp. AP21 and Azospirillum brasilense D7 resulted in the highest indolic compound production (p < 0.05). Although the Azospirillum strain showed the highest potential in the in vitro and in silico tests, the plants responded better when PGPB were co-inoculated, demonstrating the importance of integrating in silico, in vitro, and in vivo assessment results when selecting PGPB to mitigate drought stress.

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“…There are important reports in the literature on the beneits of grasses grown after legumes interacting with symbiotic N-ixing bacteria [5,21,22]. Currently, among the 13 symbiotic N-ixing bacteria, including the genera Rhizobium, Mesorhizobium, Bradyrhizobium, there are the subclasses α-proteobacteria and β-proteobacteria, with two genera belonging to the Burkholderiales, and a genus Pseudomonas subclass γ-proteobacteria [23].…”

Section: Beneicial Interaction Between Grasses and Nitrogen Ixing Bacmentioning

confidence: 99%

Analytical Interpretation of the Beneficial Interaction Between Microorganisms and Grasses

Machado¹

2017

Grasses - Benefits, Diversities and Functional Roles

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Soil microorganisms compose ¼ of the biodiversity of our planet and are responsible for important processes such as the decomposition of organic residues and the transformation of the nutrients contained in these residues into nutrients for plants. The microorganisms also aid the grasses implantation, increasing the grasses yield by means of several mechanisms of plant growth promotion. These mechanisms of growth promotion of grasses can be direct, or indirect. In this chapter, we discuss the main mechanisms of growth promotion of grasses by soil microorganisms. It will be explained how the microorganisms in the soil act favoring the growth and development of cultivated grasses. For this, there will be clariied the importance of soil microorganisms in nutrient cycling, the mechanisms of nutrient capture, the production of phytostimulant substances by microorganisms, and the mechanisms of soil pathogen suppression.Keywords: nutrient cycling, biological nitrogen ixation, interaction between plants, microorganisms IntroductionThe microbial population inhabiting the rhizosphere consists of a wide range of organisms, which together interact directly and indirectly with the cultivated plants. Only with regard to the number of bacteria, it is estimated that there are about 2 billion cells per gram of soil [1]. These microorganisms become interesting to the human species, as they interfere in the yield of the cultivated plants, by means of several mechanisms.A microorganism is considered a plant growth promoter when it is capable of increasing the yield of the crops of interest. To measure this capacity, the interaction of a given microorganism with some plants of interest must irst be evaluated under axenic conditions and in comparison © 2017 The Author(s). Licensee InTech. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.with cultivated plants. It is fundamental that this initial stage is studied in isolation of the interaction of the plant with the organism, thus isolating the interaction of other factors such as climate, environment, and other edaphic or epiedaphic macro or microorganisms to make sure that the efect on the yield of the plants of interest is solely and exclusively due to the inoculated microorganism. Without this initial screening under axenic conditions, it would be impossible to certify and prove that the positive efect observed in the studied plant is due to the microorganism of interest.Only after the positive efect of the microorganism on the plant has been proven, this interaction will be tested under conditions of greater interference, such as greenhouse, fertilization, or soil conditions with an original ield microbial population (nonsterile soil). Under these conditions, the resistance of the interaction to various interference factors will be tested. Once approved in tests condu...

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Rhizobial Inoculation, Alone or Coinoculated with Azospirillum brasilense, Promotes Growth of Wetland Rice

Cited by 18 publications

References 39 publications

Wheat cultivars submitted to seed inoculation with Azospirillum brasilense and nitrogen application in different environments

Wheat cultivars submitted to seed inoculation with Azospirillum brasilense and nitrogen application in different environments

Potential of Herbaspirillum and Azospirillum Consortium to Promote Growth of Perennial Ryegrass under Water Deficit

Analytical Interpretation of the Beneficial Interaction Between Microorganisms and Grasses

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