Effect of Azospirillum brasilense coinoculated with Rhizobium on Phaseolus vulgaris flavonoids and Nod factor production under salt stress

The effects of salt upon Azospirillum brasilense strain Cd on plant growth, nodulation, flavonoid and lipochitooligosaccharide (LCOs-Nod factor) production, were sequentially followed after 4, 7 and 14 days during a Rhizobium- Phaseolus vulgaris cv. Negro Jamapa interaction, in a hydroponics growth...

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Veröffentlicht in:Soil biology & biochemistry 2008-11, Vol.40 (11), p.2713-2721
Hauptverfasser: Dardanelli, Marta S., Fernández de Córdoba, Francisco J., Espuny, M. Rosario, Rodríguez Carvajal, Miguel A., Soria Díaz, María E., Gil Serrano, Antonio M., Okon, Yaacov, Megías, Manuel
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container_end_page 2721
container_issue 11
container_start_page 2713
container_title Soil biology & biochemistry
container_volume 40
creator Dardanelli, Marta S.
Fernández de Córdoba, Francisco J.
Espuny, M. Rosario
Rodríguez Carvajal, Miguel A.
Soria Díaz, María E.
Gil Serrano, Antonio M.
Okon, Yaacov
Megías, Manuel
description The effects of salt upon Azospirillum brasilense strain Cd on plant growth, nodulation, flavonoid and lipochitooligosaccharide (LCOs-Nod factor) production, were sequentially followed after 4, 7 and 14 days during a Rhizobium- Phaseolus vulgaris cv. Negro Jamapa interaction, in a hydroponics growth system. Azospirillum brasilense promoted root branching in bean seedling roots and increased secretion of nod-gene-inducing flavonoid species, as detected by high-performance liquid chromatography (HPLC). The results also support that A. brasilense allows a longer, more persistent exudation of flavonoids by bean roots. A general positive effect of Azospirillum- Rhizobium coinoculation on the expression of nod-genes by Rhizobium tropici CIAT899 and Rhizobium etli ISP42, and on nodulation factor patterns, was observed in the presence of root exudates. The negative effects obtained under salt stress on nod-gene expression and on Nod factors' appearance were relieved in coinoculated plants.
doi_str_mv 10.1016/j.soilbio.2008.06.016
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subjects Abiotic stress
Agronomy. Soil science and plant productions
Azospirillum brasilense
beans
Biochemistry and biology
Biological and medical sciences
chemical constituents of plants
Chemical, physicochemical, biochemical and biological properties
Coinoculation
field crops
Flavonoids
Fundamental and applied biological sciences. Psychology
gene expression
nitrogen-fixing bacteria
Nod factors
nod-gene expression
nodulation
nodulation factors
oligosaccharides
Phaseolus vulgaris
Physics, chemistry, biochemistry and biology of agricultural and forest soils
plant growth-promoting rhizobacteria
Rhizobium
Rhizobium etli
Rhizobium tropici
root exudates
root growth
root nodules
roots
salinity
salt stress
seedlings
Soil science
strains
symbionts
symbiosis
title Effect of Azospirillum brasilense coinoculated with Rhizobium on Phaseolus vulgaris flavonoids and Nod factor production under salt stress
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