Diseases in rice plants (paddy) caused by microorganisms such as Pyricularia oryzae lead to a decrease production. Therefore, it is essential find out biological agents for protecting paddy and general, against plant diseases. Liquid smoke endophytic fungi have been known enhance the protection of disease. The purpose this study was determine ability liquid smoke, concentrations combinations su...

Abstract Pyricularia oryzae is one of the most devastating plant pathogens in world. This fungus produces several secondary metabolites including phytotoxin pyriculols, which are classified into 2 types: aldehyde form (pyriculol and pyriculariol) alcohol (dihydropyriculol dihydropyriculariol). Although interconversion between has been predicted, PYC10 gene for oxidation to known, responsible re...

Abstract Synthesis of assumed natural (12R,13S)-enantiomers pyriculariol (1) and dihydropyriculariol (2), phytotoxins isolated from rice blast disease fungus, Pyricularia oryzae, was achieved using Wittig reaction or microwave-assisted Stille coupling as the key step. The synthesis revealed that 1 2 are racemates. Foliar application test on a leaf indicated both salicylaldehyde core side chain ...

A series of novel glycosylthiadiazole derivatives, namely 2-phenylamino-5-glycosyl-1,3,4-thiadiazoles, were designed and synthesized by condensation between sugar aldehydes A/B and substituted thiosemicarbazide C followed by oxidative cyclization by treating with manganese dioxide. The original fungicidal activities results showed that some title compounds exhibited excellent fungicidal activit...

antitumor and antifungal agents. Recently, curacin A, which is a potential antitumor agent, was isolated from marine cyanobacterium (blue-green alga) Lyngbya majuscula as an antimitotic cytotoxic component.1} We have reported an effective assay method for antimitotic substances, which observes deformations of mycelia germinated from conidia of Pyricularia oryzae P-2b, and certain antimitotic co...

A bioassay method detecting deformations of mycelia germinated from conidia of Pyricularia oryzae P-2b, has been modified to give quantitative estimations. The method was first developed using antimitotic agents which showed characteristic curling effect. Morphological deformations include curling, swelling, hyper-divergency, beads shape and so on, and inhibition of the germination was also obs...

Phellinsin A, a novel chitin synthases inhibitor was isolated from the cultured broth of fungus PL3, which was identified as Phellinus sp. PL3. Phellinsin A was purified by solvent partition, silica gel, ODS column chromatographies, and preparative HPLC, consecutively. The structure of phellinsin A was assigned as a phenolic compound on the basis of various spectroscopic analyses including UV, ...