Repositorio
Institucional

Cornejo, Pablo

Silambarasan, Sivagnanam#Logeswari, Peter#Kannan, Velu Rajesh

Evaluation of the production of exopolysaccharide by plant growth promoting yeast Rhodotorula sp. strain CAH2 under abiotic stress conditions

ELSEVIER

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

en

The capability of plant growth promoting microbes to survive under abiotic stresses has important significance for improving plant growth and productivity. Among the various plant growth promoting biomolecules produced by microbes, exopolysaccharide (EPS) help microbes to survive in inhospitable environments and endure environmental stressful conditions. In the present study, a yeast strain CAH2 was isolated from Beta vulgaris rhizosphere soil and identified as Rhodotorula sp., based on the partial 18S rRNA gene sequence analysis. Rhodotorula sp. strain CAH2 was found to tolerate higher concentrations of Al (6 mM), NaCl (150 mM) and PEG-6000 (15%, w/v). The strain CAH2 was shown to produce 7.5 g L-1 of EPS in the production medium with sucrose and yeast extract as a carbon and nitrogen sources, respectively. The EPS yield was increased constantly with increasing concentrations of Al. NaCI and PEG-6000. The structural feature of EPS studied through FT-IR and NMR spectral analysis confirmed the presence of glucose, mannose and galactose. The yeast strain CAH2 was produced multiple plant growth promoting traits in the presence and absence of abiotic stresses. Finally, these results indicate that the production of EPS could be safeguard the plant growth promoting Rhodotorula sp. strain CAH2 from unfavourable environmental conditions. (C) 2018 Elsevier B.V. All rights reserved.

Artículo original

S. Silambarasan is thankful to the Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT), Government of Chile for awarded the FONDECYT post-doctoral research grant (No 3170123). P. Cornejo acknowledges the financial support received in the form of FONDECYT Regular grant (No 1170264) from CONICYT, Government of Chile.

S. Silambarasan agradece a la Comisión Nacional de Investigación Científica y Tecnológica (CONICYT) del Gobierno de Chile por la beca FONDECYT para investigación postdoctoral (n.° 3170123). P. Cornejo agradece el apoyo financiero recibido mediante la beca FONDECYT Regular (n.° 1170264) de CONICYT del Gobierno de Chile.

10.1016/j.ijbiomac.2018.10.016

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Rhodotorula sp. strain CAH2# Abiotic stresses# Exopolysaccharide# Plant growth promoting traits

http://dx.doi.org/10.1016/j.ijbiomac.2018.10.016

Biochemistry & Molecular Biology# Chemistry, Applied# Polymer Science

Rhodotorula sp. cepa CAH2# Estreses abióticos# Exopolisacárido# Rasgos que promueven el crecimiento de las plantas.

Agronomía

Microbiología

Biotecnología agrícola

WOS:000452346100007

Evaluation of the production of exopolysaccharide by plant growth promoting yeast <i>Rhodotorula</i> sp. strain CAH2 under abiotic stress conditions

Artículo original

version publicada

ELSEVIER

INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES

Bioquímica y Biología Molecular# Química Aplicada# Ciencia de los polímeros

0141-8130

en

ANID FONDECYT 3170123#ANID FONDECYT 1170264

ANID CONICYT 3170123

ANID CONICYT FONDECYT 1170264

S. Silambarasan is thankful to the Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT), Government of Chile for awarded the FONDECYT post-doctoral research grant (No 3170123). P. Cornejo acknowledges the financial support received in the form of FONDECYT Regular grant (No 1170264) from CONICYT, Government of Chile.

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hibrida#verde

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