Consulta: creatorFacets:"Ambrosini,Adriana"
Registros recuperados: 5
Data/hora: 18/06/2024 15:51:02

Plant growth-promoting bacteria as inoculants in agricultural soils
Provedor de dados: 74
Autores: Souza,Rocheli de; Ambrosini,Adriana; Passaglia,Luciane M.P.
Abstract Plant-microbe interactions in the rhizosphere are the determinants of plant health, productivity and soil fertility. Plant growth-promoting bacteria (PGPB) are bacteria that can enhance plant growth and protect plants from disease and abiotic stresses through a wide variety of mechanisms; those that establish close associations with plants, such as the endophytes, could be more successful in plant growth promotion. Several important bacterial characteristics, such as biological nitrogen fixation, phosphate solubilization, ACC deaminase activity, and production of siderophores and phytohormones, can be assessed as plant growth promotion (PGP) traits. Bacterial inoculants can contribute to increase agronomic efficiency by reducing production costs...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Nitrogen fixation; Siderophore production; Plant-bacteria interaction; Inoculant; Rhizosphere.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572015000400401

Plant growth-promoting rhizobacteria (PGPR): their potential as antagonists and biocontrol agents
Provedor de dados: 74
Autores: Beneduzi,Anelise; Ambrosini,Adriana; Passaglia,Luciana M.P.
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...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Antagonism; Siderophore; Antibiotic; SAR; ISR.
Ano: 2012
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572012000600020

Amplification of 16S rRNA gene sequences to differentiate two highly related bradyrhizobia species
Provedor de dados: 86
Autores: Giongo,Adriana; Ambrosini,Adriana; Freire,João Ruy Jardim; Zanettini,Maria Helena Bodanese; Passaglia,Luciane Maria Pereira.
A 16S rRNA gene PCR-based assay was developed aiming at a fast molecular diagnostic method to differentiate the two phylogenetically closely related species Bradyrhizobium japonicum and B. elkanii, isolated from soybean nodules, in order to identify those more competitive and comprising greater nitrogen fixation ability for use in the formulation of commercial inoculants. The assay used was able to discriminate ten reference strains belonging to these two Bradyrhizobium species, as well as to efficiently identify 37 strains isolated from fields cultivated with soybean.
Tipo: Info:eu-repo/semantics/article
Palavras-chave: PCR; Rhizobial diversity; Commercial inoculants.
Ano: 2007
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000900019

Isolation and characterization of two plant growth-promoting bacteria from the rhizoplane of a legume (Lupinus albescens) in sandy soil
Provedor de dados: 90
Autores: Giongo,Adriana; Beneduzi,Anelise; Ambrosini,Adriana; Vargas,Luciano Kayser; Stroschein,Marcos Roberto; Eltz,Flávio Luiz; Bodanese-Zanettini,Maria Helena; Passaglia,Luciane Maria Pereira.
Two bacterial strains that amplified part of the nifH gene, RP1p and RP2p, belonging to the genus Enterobacter and Serratia, were isolated from the rhizoplane of Lupinus albescens. These bacteria are Gram-negative, rod-shaped, motile, facultative anaerobic, and fast-growing; the colonies reach diameters of 3-4 mm within 24 h of incubation at 28 ºC. The bacteria were also able to grow at temperatures as high as 40 ºC, in the presence of high (2-3 % w/v) NaCl concentrations and pH 4 -10. Strain RP1p was able to utilize 10 of 14 C sources, while RP2p utilized nine. The isolates produced siderophores and indolic compounds, but none of them was able to solubilize phosphate. Inoculation of L. albescens with RP1p and RP2p strains resulted in a significant...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Indolic compounds; Siderophores; Inoculation experiment.
Ano: 2010
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000200009

SOIL FUNGISTASIS AGAINST FUSARIUM GRAMINEARUM UNDER DIFFERENT CROP MANAGEMENT SYSTEMS
Provedor de dados: 90
Autores: Lisboa,Bruno Brito; Bayer,Cimélio; Passaglia,Luciane Maria Pereira; Camargo,Flávio Anastácio de Oliveira; Beneduzi,Anelise; Ambrosini,Adriana; Vargas,Luciano Kayser.
Soil management, in terms of tillage and cropping systems, strongly influences the biological properties of soil involved in the suppression of plant diseases. Fungistasis mediated by soil microbiota is an important component of disease-suppressive soils. We evaluated the influence of different management systems on fungistasis against Fusarium graminearum, the relationship of fungistasis to the bacterial profile of the soil, and the possible mechanisms involved in this process. Samples were taken from a long-term experiment set up in a Paleudult soil under conventional tillage or no-tillage management and three cropping systems: black oat (Avena strigose L.) + vetch (Vicia sativa L.)/maize (Zea mays L.) + cowpea (Vigna sinensis L.), black oat/maize, and...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Crop systems; Fungistasis; No-tillage; Plant diseases.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000100069