Data/hora: 09/06/2024 08:41:02

Provedor de dados: | Genetics and Molecular Biology
País: | Brazil
Título: | Plant growth-promoting rhizobacteria (PGPR): their potential as antagonists and biocontrol agents
Autores: | Beneduzi,Anelise; Ambrosini,Adriana; Passaglia,Luciana M.P.
Data: | 2012-01-01
Ano: | 2012
Palavras-chave: | Antagonism; Siderophore; Antibiotic; SAR; ISR.
Resumo: | Bacteria that colonize plant roots and promote plant growth are referred to as plant growth-promoting rhizobacteria (PGPR). PGPR are highly diverse and in this review we focus on rhizobacteria as biocontrol agents. Their effects can occur via local antagonism to soil-borne pathogens or by induction of systemic resistance against pathogens throughout the entire plant. Several substances produced by antagonistic rhizobacteria have been related to pathogen control and indirect promotion of growth in many plants, such as siderophores and antibiotics. Induced systemic resistance (ISR) in plants resembles pathogen-induced systemic acquired resistance (SAR) under conditions where the inducing bacteria and the challenging pathogen remain spatially separated. Both types of induced resistance render uninfected plant parts more resistant to pathogens in several plant species. Rhizobacteria induce resistance through the salicylic acid-dependent SAR pathway, or require jasmonic acid and ethylene perception from the plant for ISR. Rhizobacteria belonging to the genera Pseudomonas and Bacillus are well known for their antagonistic effects and their ability to trigger ISR. Resistance-inducing and antagonistic rhizobacteria might be useful in formulating new inoculants with combinations of different mechanisms of action, leading to a more efficient use for biocontrol strategies to improve cropping systems.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600020
Editor: | Sociedade Brasileira de Genética
Relação: | 10.1590/S1415-47572012000600020
Formato: | text/html
Fonte: | Genetics and Molecular Biology  v.35 n.4 suppl.1 2012
Fonte: | info:eu-repo/semantics/openAccess