Repositorio
Institucional

Cornejo, Pablo

Silambarasan, Sivagnanam

Logeswari, Peter

Vangnai, Alisa S.

Kamaraj, Balu

Plant growth-promoting actinobacterial inoculant assisted phytoremediation increases cadmium uptake in Sorghum bicolor under drought and heat stresses*

ELSEVIER SCI LTD

ENVIRONMENTAL POLLUTION

en

In this study, two proficient Cadmium (Cd) resistant and plant growth-promoting actinobacterial strains were isolated from metal-polluted soils and identified as Streptomyces sp. strain RA04 and Nocardiopsis sp. strain RA07. Multiple abiotic stress tolerances were found in these two actinobacterial strains, including Cd stress (CdS), drought stress (DS) and high-temperature stress (HTS). Both actinobacterial strains exhibited multifarious plant growth-promoting (PGP) traits such as phosphate solubilization, and production of indole-3-acetic acid, siderophores and 1-aminocyclopropane-1-carboxylate deaminase under CdS, DS and HTS conditions. The inoculation of strains RA04 and RA07 significantly increased Sorghum bicolor growth and photosynthetic pigments under CdS, DS, HTS, CdS + DS and CdS + HTS conditions as compared to their respective uninoculated plants. The actinobacterial inoculants reduced malondialdehyde concentration and enhanced antioxidant enzymes in plants cultivated under various abiotic stress conditions, indicating that actinobacterial inoculants reduced oxidative damage. Furthermore, strains RA04 and RA07 enhanced the accumulation of Cd in plant tissues and the translocation of Cd from root to shoot under CdS, CdS + DS and CdS + HTS treatments as compared to their respective uninoculated plants. These findings suggest that RA04 and RA07 strains could be effective bioinoculants to accelerate phytoremediation of Cd polluted soil even in DS and HTS conditions.

artículo original

"S. Silambarasan thankfully acknowledges the financial support received from ""Vicerrectoria de Investigacion y Postgrado, Universidad de La Frontera, Chile"". P. Cornejo acknowledges the ""Agencia Nacional de Investigacion y Desarrollo"" (ANID-Chile) for funding the ANID/FONDECYT/1210964 and ANID/FONDAP/15130015 grants, as well as the Chilean Ministry of Education (MINEDUC Chile) for funding the InES19 project, code FRO19101. The fund by the National Research Council of Thailand (N42A640329) is acknowledged.

S. Silambarasan agradece el apoyo financiero recibido de la ""Vicerrectoria de Investigación y Postgrado, Universidad de La Frontera, Chile"". P. Cornejo agradece a la Agencia Nacional de Investigación y Desarrollo (ANID-Chile) por financiar las becas ANID/FONDECYT/1210964 y ANID/FONDAP/15130015, así como al Ministerio de Educación de Chile (MINEDUC Chile) por financiar el InES19 proyecto, código FRO19101. Se reconoce el fondo del Consejo Nacional de Investigación de Tailandia (N42A640329)."

10.1016/j.envpol.2022.119489

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Plant growth-promoting actinobacteria

Cadmium

Phytoremediation

Abiotic stress

Antioxidant enzymes

Sorghum bicolor

ZEA-MAYS L.

INDUCED OXIDATIVE STRESS

CONTAMINATED SOIL

TRACE-ELEMENTS

CITRIC-ACID

TOLERANCE

BACTERIA

ASSAY

PHYTOEXTRACTION

ALLEVIATION

Ciencias Ambientales

Actinobacterias promotoras del crecimiento vegetal

Cadmio

Fitorremediación

Estrés abiótico

Enzimas antioxidantes

Sorgo bicolor

ZEA-MAYS L.

ESTRÉS OXIDATIVO INDUCIDO

SUELO CONTAMINADO

OLIGOELEMENTOS

ÁCIDO CÍTRICO

TOLERANCIA

BACTERIAS

ENSAYO

FITOEXTRACCIÓN

ALIVIACIÓN

Biorremediación

Biotecnología Ambiental

Agronomía

Plant growth-promoting actinobacterial inoculant assisted phytoremediation increases cadmium uptake in Sorghum bicolor under drought and heat stresses*

artículo original

version publicada

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metadata

metadata

WOS:000804993600008

ANID FONDECYT 1210964

ANID FONDAP 15130015

MINEDUC FRO19101

NRCT N42A640329