| two new antifungal alkaloids produced by streptoverticillium morookaense. | a new carbazole alkaloid, streptoverticillin, and a new 2-azetidinone, streptoverticillinone, along with three known cyclodipeptides were isolated from the mycelial solid culture of streptoverticillium morookaense. their structures were elucidated by analysis of 1d and 2d nmr, mass spectra and optical rotation data. two new compounds exhibited antifungal activity against peronophythora litchii. | 2007 | 17446689 |
| secondary metabolites of the phytopathogen peronophythora litchii. | two new metabolites, 4r*-hydroxy-3,5r*-dimethoxycyclohex-2-enone (1) and 2-hydroxy-n-(2-hydroxyphenyl)propionamide (2), were isolated from solid cultures of the phytopathogen peronophythora litchii, along with 4-hydroxybenzyl alcohol (3) and methyl d-indole-3-lactate (4). their structures were elucidated on the basis of spectroscopic and spectrometric data. these metabolites were not toxic to brine shrimps (lc50 > 500 microg/ml). | 2010 | 20334136 |
| generation and characterization of isolates of peronophythora litchii resistant to carboxylic acid amide fungicides. | four isolates of peronophythora litchii with resistance to carboxylic acid amide (caa) fungicides were selected on fungicide-amended agar. these isolates had various levels of resistance, as evidenced by their resistance factor (rf), which is the 50% effective concentration (ec(50)) value of a particular isolate divided by that of the wild-type parent. rf values to dimethomorph for the four isolates were 15, 24, 141, and >1,500. resistance was stable for two isolates, while the ec(50) values dec ... | 2010 | 20373974 |
| antifungal properties of methanol extract and its active compounds from brickellia rosmarinifolia vent. | a new isocoumarin, 7-hydroxyl-4-methyl isocoumarine (1), together with three known monoterpenes, (3r, 4r, 6s)-3, 6-dihydroxy-1-menthene (2), (+)-(1r, 3s, 4r, 6s)-6-hydroxymenthol (3) and 4-isopropyl-1-methylcyclohex-2-ene-1, 6-diol (4), was isolated from the methanol extract of brickellia rosmarinifolia. the structures were determined by spectroscopic means. compounds 1, 2, 3 and 4 showed antifungal activities against colletotrichum musae and peronophythora litchii in vitro. | 2010 | 20678558 |