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Publication Type J
Authors Idaszkin, Y. L., R. Polifroni and J. Mesa-Marin
Title Isolation of Plant Growth Promoting Rhizobacteria from Spartina densiflora and Sarcocornia perennis in San Antonio polluted salt marsh, Patagonian Argentina
Source Estuarine Coastal and Shelf Science
Language English
Author Keywords Halophytes Heavy metal Phosphate solubilization Auxins Siderophores Chitinase metal-resistant phytoremediation estuaries accumulation soils environments restoration communities bacteria Marine & Freshwater Biology Oceanography
Abstract With the purpose of Plant Growth Promoting Rhizobacteria (PGPR) isolation, several authors have sampled different wetlands in the northern half of Argentina. However, to date, we do not know the existence of microbiological studies conducted in the Patagonian salt marshes, and concretely, concerning isolation of PGPR. The present work was conducted in the heavy metal polluted San Antonio salt marsh, in two areas with different grade of pollution. In those areas, we isolated cultivable bacteria from the rhizosphere of the halophytes Spartina densiflora and Sarcocornia perennis, and look for several plant growth promoting (PGP) properties among them. In total, 60 different cultivable bacteria were isolated. 50% of the rhizobacterial strains demonstrated at least one of the PGP properties assayed, 25% of them produced siderophores, 16% were able to solubilize phosphate, 11% were able to produce auxins and 7% chitinase. We could observe that PGP properties were more abundant among bacteria growing in polluted soils. Also, bacteria inhabiting S. densiflora rhizosphere showed more PGP properties related to heavy metal phytostabilization mechanisms, in line with the phytoremediation strategy of this halo-phyte. Overall, these findings support the idea that coastal hazardous scenarios may be a good opportunity to seek for PGPR. Indeed, some of the strains isolated in this work presented more than one PGP property, so they may be selected for further formulation of inoculants for different applications. For further research, it would be interesting to analyse other PGP properties in these strains, as well as to isolate rhizobacteria from other halo-phytes in diverse Patagonian salt marshes.
Author Address [Idaszkin, Yanina L.] Consejo Nacl Invest Cient & Tecn, Inst Patagon Estudio Ecosistemas Continentales IP, CENPAT, Puerto Madryn, Chubut, Argentina. [Idaszkin, Yanina L.] Univ Nacl Patagonia San Juan Bosco, Blvd Brown 3051,U9120ACD, Puerto Madryn, Chubut, Argentina. [Polifroni, Rosana] Consejo Nacl Invest Cient & Tecn, Ctr Estudio Sistemas Marinos CESIMAR, CENPAT, Puerto Madryn, Chubut, Argentina. [Mesa-Marin, Jennifer] Univ Seville, Fac Biol, Dept Biol Vegetal & Ecol, Campus Reina Mercedes, Seville 41012, Spain. Mesa-Marin, J (corresponding author), Univ Seville, Fac Biol, Dept Biol Vegetal & Ecol, Campus Reina Mercedes, Seville 41012, Spain. jmesam@us.es
ISSN 0272-7714
ISBN 0272-7714
29-Character Source Abbreviation Estuar. Coast. Shelf Sci.
Publication Date Oct
Year Published 2021
Volume 260
Beginning Page 7
Digital Object Identifier (DOI) 10.1016/j.ecss.2021.107488
Unique Article Identifier WOS:000702688200001

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