Inoculation of paddy rice with Azospirillum brasilense and Pseudomonas fluorescens: Impact of plant genotypes on rhizosphere microbial communities and field crop production

Salamone, Inés E. García de; Funes, Juan M.; Salvo, Luciana P. Di; Escobar-Ortega, J; D'Auria, F; Ferrando, Lucía; Scavino, Ana Fernández

doi:10.1016/j.apsoil.2011.12.012

Cited by 86 publications

(51 citation statements)

References 22 publications

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“…Although the average values of absorbance for arginine showed that the microbial communities associated with inoculated and control plants had significant differences in ability to use arginine, a moderate effect on the physiological and genetic characteristics of microbial communities associated with certain rice cultivars was found under field conditions [24]. The nif H T-RFLP-patterns of diazotrophic communities associated with rice roots showed that some of the restriction fragments permitted differentiation of inoculation treatments, such as the 66 bp fragment that could correspond to Methylogaea oryzae which is a methanotrophic bacterium associated with rice [24]. These data suggest that the hormonal effect exercised by Azospirillum improves the efficiency of the nitrogen absorption leading to superior yields of biomass.…”

Section: Inoculation Impact Analysismentioning

confidence: 99%

Microbial Inoculants and Their Impact on Soil Microbial Communities: A Review

Trabelsi

Mhamdi

2013

BioMed Research International

320

170

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The knowledge of the survival of inoculated fungal and bacterial strains in field and the effects of their release on the indigenous microbial communities has been of great interest since the practical use of selected natural or genetically modified microorganisms has been developed. Soil inoculation or seed bacterization may lead to changes in the structure of the indigenous microbial communities, which is important with regard to the safety of introduction of microbes into the environment. Many reports indicate that application of microbial inoculants can influence, at least temporarily, the resident microbial communities. However, the major concern remains regarding how the impact on taxonomic groups can be related to effects on functional capabilities of the soil microbial communities. These changes could be the result of direct effects resulting from trophic competitions and antagonistic/synergic interactions with the resident microbial populations, or indirect effects mediated by enhanced root growth and exudation. Combination of inoculants will not necessarily produce an additive or synergic effect, but rather a competitive process. The extent of the inoculation impact on the subsequent crops in relation to the buffering capacity of the plant-soil-biota is still not well documented and should be the focus of future research.

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Section: Inoculation Impact Analysismentioning

confidence: 99%

Microbial Inoculants and Their Impact on Soil Microbial Communities: A Review

Trabelsi

Mhamdi

2013

BioMed Research International

320

170

View full text Add to dashboard Cite

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“…Countless studies have been conducted to study the isolation, characterization and identification of PGPB in grasses (Khalid et al, 2004;Roesch et al, 2007;Ilyas and Bano 2010;Arzanesh et al, 2011;Rashid et al, 2012;Arruda et al, 2013). Other studies have investigated plant-bacteria interactions (Weyens et al, 2009;Hardoim et al, 2015) and have demonstrated their potential agricultural and environmental applications, such as the control of diseases and pests (Compant et al, 2005;Mendes et al, 2007), the promotion of plant growth (García de Salamone et al, 2012;Rojas-Tapias et al, 2012), the biological fixation of nitrogen in plants, the production of metabolites of pharmacological and biotechnology interest (de- Bashan et al, 2004), the creation of vectors to introduce genes of interest into plants (Murray et al, 1992) and the production of organic products that reduce the need for fertilizers in nature (Sala et al, 2008;Singh et al, 2011), among others. Farmers constantly demand technologies that reduce costs and achieve eco-sustainable alternatives.…”

Section: Introductionmentioning

confidence: 99%

Interactions between endophytic bacteria and their effects on poaceae growth performance in different inoculation and fertilization conditions

Chaves¹,

Guimarães²,

Vendruscolo³

et al. 2019

Aust J Crop Sci

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Plant growth-promoting bacteria (PGPB) are a broad group of microorganisms that offer a huge, unexplored potential. We assessed the genetic diversity of endophytic bacteria that were isolated from corn and wheat plants in 3 different types of soils: A1 (Red Argisol), A2 (Red Latosol) and A3 (Red Nitossol). Endophytic bacteria were isolated from seedlings using 7 solid culture media and were further analyzed by 16S gene sequencing. IAA (Indole-3-acetic acid) production and PSI (Phosphorus solubilization index) bacteria capacity were tested in a randomly scheme in triplicate. In vitro association was assayed with 6 randomly selected endophytic strains. The experiment design was arranged in a randomly scheme with 10 replications. In vivo assays were performed to evaluate plant growth promotion using a low-fertility soil in different inoculation and/or fertilization conditions. The experiment design was arranged in a factorial 3x4 scheme in triplicate. The following characteristics were evaluated in both experiments in triplicate: plant biomass, total nitrogen content (TN) and endophytic population. As results, a total of 136 isolates were collected, and from these isolates, 41 strains were sequenced and classified into 4 major phylogenetic categories. There was a 38-fold variation between the highest (Ensifer adhaerens) and the lowest (Agrobacterium larrymoorei) IAA producer, and only 14% of strains were high phosphate solubilizers. In vitro assays identified both positively (Burkholderia ambifaria) and negatively (Pantoea ananatis) associative strains. In vivo assays showed that plant genotype can limit or induce the endophytic microbiota and that plant microbiota are highly influenced by soil fertility.

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“…Among the Alphaproteobacteria , Azospirillum is one of the most studied genera (8). This genus was isolated not only from the rice phyllosphere (7, 17), but also from the rhizosphere of other plants (21).…”

mentioning

confidence: 99%

Impact of <i>Azospirillum</i> sp. B510 Inoculation on Rice-Associated Bacterial Communities in a Paddy Field

et al. 2013

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Rice seedlings were inoculated with Azospirillum sp. B510 and transplanted into a paddy field. Growth in terms of tiller numbers and shoot length was significantly increased by inoculation. Principal-coordinates analysis of rice bacterial communities using the 16S rRNA gene showed no overall change from B510 inoculation. However, the abundance of Veillonellaceae and Aurantimonas significantly increased in the base and shoots, respectively, of B510-inoculated plants. The abundance of Azospirillum did not differ between B510-inoculated and uninoculated plants (0.02–0.50%). These results indicate that the application of Azospirillum sp. B510 not only enhanced rice growth, but also affected minor rice-associated bacteria.

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Inoculation of paddy rice with Azospirillum brasilense and Pseudomonas fluorescens: Impact of plant genotypes on rhizosphere microbial communities and field crop production

Cited by 86 publications

References 22 publications

Microbial Inoculants and Their Impact on Soil Microbial Communities: A Review

Microbial Inoculants and Their Impact on Soil Microbial Communities: A Review

Interactions between endophytic bacteria and their effects on poaceae growth performance in different inoculation and fertilization conditions

Impact of <i>Azospirillum</i> sp. B510 Inoculation on Rice-Associated Bacterial Communities in a Paddy Field

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