Endophytic microorganisms, defined as fungi or bacteria that colonize the interior of plants without causing any immediate negative effects or damages, have reciprocal relationships with host plants. In some cases their presence is beneficial to the host due to the synthesis of bioactive compounds, among which several alcohols, esters, ketones and others that may react with other compounds and ...

A total of 100 isolates of chitinolytic bacteria were obtained from the rhizospheres of various agronomic plants, and the 16S rRNA gene sequences of these isolates were determined. Phylogenetic analyses revealed that 81 isolates belonged to the classes Betaproteobacteria (39 isolates) and Gammaproteobacteria (42 isolates). Of the remaining 19 isolates, 16 belonged to the phylum Firmicutes. Clus...

The study was conducted over the years 2012-2013 in order to evaluate the antagonistic effects of the metabolites of actinomycetes against phytopathogenic fungi of agricultural importance. To demonstrate the antagonist activity of antibiosis, bioassays were performed in vitro using the method of wells with cell-free filtrates and the double layer method with chloroform in order to kill living c...

In fungi a genetic system ensures that enzymes are secreted mainly at ambient pH values corresponding to their optima of activity. Although a great deal of information has been obtained concerning this environmental response, there is a lack of studies involving phytopathogenic, endophytic and entomopathogenic fungi as well as different aspects of fungus-host interactions. This study compares i...

The present study was carried out to evaluate the ability of Trichoderma harzianum (ALL 42-isolated from Brazilian Cerrado soil) to promote common bean growth and to modulate its metabolism and defense response in the presence or absence of the phytopathogenic fungi Rhizoctonia solani and Fusarium solani using a proteomic approach. T. harzianum was able to promote common bean plants growth as s...

Many plants produce low-molecular-weight compounds which inhibit the growth of phytopathogenic fungi in vitro. These compounds may be preformed inhibitors that are present constitutively in healthy plants (also known as phytoanticipins), or they may be synthesized in response to pathogen attack (phytoalexins). Successful pathogens must be able to circumvent or overcome these antifungal defenses...

In the course of our screening program, a streptomyces strain S-288 was found to produce an antibiotic which exhibits a bulging effect^ against Piricularia oryzae. This strain was isolated from a soil sample collected at Mie Prefecture, Japan. As a result of taxonomic studies by the usual methods, its characteristics are summarized as follows: no whorl, no spiral, smooth surface of spores, yell...

The minimal inhibitory concentrations (MIC) of various antibiotics and fungicides for Erwinia carotovora, Pseudomonas coronafaciens var. atropurpurea, P. lachrymans, Alternaria mali, A. kikuchiana, Pyricularia oryzae, Botrytis sp. and Sclerotinia sp. isolated from diseased plants in various localities of Japan were examined to enable the isolates to be gruoped into sensitive and resistant strai...

Modern Concepts & Developments in Agronomy Computational Tools and Phytopathogenic Fungi Secretome: Unraveling the Protein Arsenal Mariana Regina Almas do Carmo1, Tulio Morgan1, Rafael Ferreira Alfenas2 Gabriela Piccolo Maitan-Alfenas1* 1Department of Biochemistry Molecular Biology, Brazil 2Department Phytopathology, *Corresponding author: Maitan-Alfenas, Department Federal University Viçosa, S...

The selection of saprotrophic antagonist fungi strains the Trichoderma genus by indicators cellulolytic and antagonistic activity for promising destructors in composting solid cellulose-containing municipal waste to obtain organic fertilizer was carried out. High (64,89–68,98 %) established asperellum D-11 (the basis biological preparation Fungilex, L) sp. L-3 component microbiological inoculan...