Beneficial bacteria improve seedling growth and nutrition and promote biological control of coffee diseases.

Aim: We investigated the effects of plant growth-promoting bacteria (PGPB) on the growth and nutrition of coffee seedlings and the biological control of coffee leaf rust (Hemileia vastatrix), brown eye spot (Cercospora coffeicola), and leaf blight (Boeremia coffeae).

Methods And Results: In the first part of the study, 19 PGPB strains, obtained in the phyllosphere, endosphere, and rhizosphere of coffee and other hosts, produced varied metabolites related to plant growth and biological control. Two coffee cultivars were treated with the bacterial strains, but cultivar Catuaí Amarelo IAC 62 was less responsive to the treatments.

Functional genomics analysis of a phyllospheric Pseudomonas spp with potential for biological control against coffee rust.

Background: Pseudomonas spp. promotes plant growth and colonizes a wide range of environments. During the annotation of a Coffea arabica ESTs database, we detected a considerable number of contaminant Pseudomonas sequences, specially associated with leaves.

Genomic and physiological evaluation of two root associated Pseudomonas from Coffea arabica.

Many Pseudomonas species promote plant growth and colonize a wide range of environments. The annotation of a Coffea arabica ESTs database revealed a considerable number of Pseudomonas sequences. To evaluate the genomic and physiology of Pseudomonas that inhabit coffee plants, fluorescent Pseudomonas from C.

Plant-Growth Endophytic Bacteria Improve Nutrient Use Efficiency and Modulate Foliar N-Metabolites in Sugarcane Seedling.

Beneficial plant-microbe interactions lead to physiological and biochemical changes that may result in plant-growth promotion. This study evaluated the effect of the interaction between sugarcane and endophytic bacterial strains on plant physiological and biochemical responses under two levels of nitrogen (N) fertilization. Six strains of endophytic bacteria, previously selected as plant growth-promoting bacteria (PGPB), were used to inoculate sugarcane mini stalks, with and without N fertilization.

Bacterial community composition and diversity of two different forms of an organic residue of bioenergy crop.

The use of residue of sugarcane ethanol industry named vinasse in fertirrigation is an established and widespread practice in Brazil. Both non-concentrated vinasse (NCV) and concentrated vinasse (CV) are used in fertirrigation, particularly to replace the potassium fertilizer. Although studies on the chemical and organic composition of vinasse and their impact on nitrous oxide emissions when applied in soil have been carried out, no studies have evaluated the microbial community composition and diversity in different forms of vinasse.

Exploitation of new endophytic bacteria and their ability to promote sugarcane growth and nitrogen nutrition.

Few studies have evaluated endophytic bacteria in relation to plant growth promotion, nitrogen uptake and biological control. The aim of this study was to molecularly and physiologically characterize thirteen endophytic bacteria strains, evaluate their biological control properties and their ability to promote plant growth and plant N nutrition. All the strains produced indole acetic acid and promoted increase of plant biomass, N accumulative amount and N-use efficiency index.

Lettuce and rhizosphere microbiome responses to growth promoting Pseudomonas species under field conditions.

Plant growth promoting rhizobacteria are well described and recommended for several crops worldwide. However, one of the most common problems in research into them is the difficulty in obtaining reproducible results. Furthermore, few studies have evaluated plant growth promotion and soil microbial community composition resulting from bacterial inoculation under field conditions.

Acidobacteria strains from subdivision 1 act as plant growth-promoting bacteria.

Acidobacteria is one of the most abundant phyla in soils and has been detected in rhizosphere mainly based on cultivation-independent approaches such as 16S rRNA gene survey. Although putative interaction of Acidobacteria with plants was suggested, so far no plant-bacterial interactions were shown. Therefore, we performed several in vitro tests to evaluate Acidobacteria-plant interactions and the possible mechanisms involved in such interaction.