Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents

The rhizosphere-associated microbiome has diverse functions that support plant growth and health, varying among plant species, vegetation growth stages and environmental habitats. This microbiome includes a group of bacteria denominated plant growth-promoting rhizobacteria (PGPR) which can colonize...

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Autores principales:	Mónica Oyuela Aguilar, Florencia Álvarez, Daniela Medeot, Edgardo Jofré, Liliana Semorile, Mariano Pistorio
Formato:	article
Lenguaje:	EN
Publicado:	International Viticulture and Enology Society 2021
Materias:	plant-growth–promoting bacteria (PGPB) rhizosphere grapevine biofertilization biocontrol Agriculture S Botany QK1-989
Acceso en línea:	https://doaj.org/article/4bdddb29cb83401398c702c3ce1dc7f8
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spelling	oai:doaj.org-article:4bdddb29cb83401398c702c3ce1dc7f82021-11-26T07:14:27ZScreening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents10.20870/oeno-one.2021.55.4.46552494-1271https://doaj.org/article/4bdddb29cb83401398c702c3ce1dc7f82021-11-01T00:00:00Zhttps://oeno-one.eu/article/view/4655https://doaj.org/toc/2494-1271 The rhizosphere-associated microbiome has diverse functions that support plant growth and health, varying among plant species, vegetation growth stages and environmental habitats. This microbiome includes a group of bacteria denominated plant growth-promoting rhizobacteria (PGPR) which can colonize plant roots. Certain PGPR isolates improve the ability of plants to adapt to a stressful environment. In this study, we collected and characterised the rhizosphere-associated bacteria, or epiphytic rhizobacteria, from Malbec and Cabernet-Sauvignon vineyards from the main wine-producing provinces of Argentina to analyse their potential use as biologic fertilisers and/or as pathogen-control agents. A total of 170 bacterial isolates were obtained, distributed into eleven different genera and classified into three phyla, Proteobacteria, Actinobacteria and Firmicutes. The in vitro analysis for plant-growth-promoting (PGP) activities demonstrated that a significant number of bacterial isolates had one or more of these traits. The Pseudomonas was the genus with the highest number of isolates and PGP activities, followed by the Arthrobacter, Serratia, Bacillus andPantoea. We observed that bacterial isolates identified as Bacillus exhibited a remarkable production of hydrolytic enzymes related to biocontrol activities. Biocontrol trials from the Bacillus collection revealed that at least five isolates were able to inhibit the fungal growth of Botrytis cinerea and Alternaria alternata. The results obtained suggest the biological potential of each isolate and the relevance of proceeding to greenhouse and field assays to obtain long-term environmentally compatible bio-products for vineyard management. Mónica Oyuela AguilarFlorencia ÁlvarezDaniela MedeotEdgardo JofréLiliana SemorileMariano PistorioInternational Viticulture and Enology Societyarticleplant-growth–promoting bacteria (PGPB)rhizospheregrapevinebiofertilizationbiocontrolAgricultureSBotanyQK1-989ENOENO One, Vol 55, Iss 4 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	plant-growth–promoting bacteria (PGPB) rhizosphere grapevine biofertilization biocontrol Agriculture S Botany QK1-989
spellingShingle	plant-growth–promoting bacteria (PGPB) rhizosphere grapevine biofertilization biocontrol Agriculture S Botany QK1-989 Mónica Oyuela Aguilar Florencia Álvarez Daniela Medeot Edgardo Jofré Liliana Semorile Mariano Pistorio Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents
description	The rhizosphere-associated microbiome has diverse functions that support plant growth and health, varying among plant species, vegetation growth stages and environmental habitats. This microbiome includes a group of bacteria denominated plant growth-promoting rhizobacteria (PGPR) which can colonize plant roots. Certain PGPR isolates improve the ability of plants to adapt to a stressful environment. In this study, we collected and characterised the rhizosphere-associated bacteria, or epiphytic rhizobacteria, from Malbec and Cabernet-Sauvignon vineyards from the main wine-producing provinces of Argentina to analyse their potential use as biologic fertilisers and/or as pathogen-control agents. A total of 170 bacterial isolates were obtained, distributed into eleven different genera and classified into three phyla, Proteobacteria, Actinobacteria and Firmicutes. The in vitro analysis for plant-growth-promoting (PGP) activities demonstrated that a significant number of bacterial isolates had one or more of these traits. The Pseudomonas was the genus with the highest number of isolates and PGP activities, followed by the Arthrobacter, Serratia, Bacillus andPantoea. We observed that bacterial isolates identified as Bacillus exhibited a remarkable production of hydrolytic enzymes related to biocontrol activities. Biocontrol trials from the Bacillus collection revealed that at least five isolates were able to inhibit the fungal growth of Botrytis cinerea and Alternaria alternata. The results obtained suggest the biological potential of each isolate and the relevance of proceeding to greenhouse and field assays to obtain long-term environmentally compatible bio-products for vineyard management.
format	article
author	Mónica Oyuela Aguilar Florencia Álvarez Daniela Medeot Edgardo Jofré Liliana Semorile Mariano Pistorio
author_facet	Mónica Oyuela Aguilar Florencia Álvarez Daniela Medeot Edgardo Jofré Liliana Semorile Mariano Pistorio
author_sort	Mónica Oyuela Aguilar
title	Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents
title_short	Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents
title_full	Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents
title_fullStr	Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents
title_full_unstemmed	Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents
title_sort	screening of epiphytic rhizosphere-associated bacteria in argentinian malbec and cabernet-sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents
publisher	International Viticulture and Enology Society
publishDate	2021
url	https://doaj.org/article/4bdddb29cb83401398c702c3ce1dc7f8
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Screening of epiphytic rhizosphere-associated bacteria in Argentinian Malbec and Cabernet-Sauvignon vineyards for potential use as biological fertilisers and pathogen-control agents

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