title: Correlation of virulence with secretion in vitro of three wall-degrading enzymes in isolates of Sclerotinia fructigena obtained after mutagen treatment.
abstract: Correlation and regression analyses were carried out between the virulence (expressed as growth rate in apple fruits) and the secretion in vitro of three host wall-degrading enzymes by 119 isolates of Sclerotinia fructigena, most of which had been obtained following exposure of conidia to N-methyl-N'-nitro-N-nitroso-guanidine. Virulence was found to be significantly correlated (P less than 0-01) with alpha-L-arabinofuranosidase, but not with pectin esterase or, where enzyme interdependence had been statistically eliminated, with polygalacturonase. Approximately 35% of the total variability in virulence could be accounted for in terms of the three enzymes.
mesh_terms: D001089:Arabinose; D001203:Ascomycota / Q000201:enzymology / Q000254:growth & development / Q000472:pathogenicity*; D004950:Esterases / Q000096:biosynthesis*; D005690:Galactose; D006026:Glycoside Hydrolases / Q000096:biosynthesis*; D008769:Methylnitronitrosoguanidine; D009153:Mutagens; D010368:Pectins; D010935:Plant Diseases; D014466:Ultraviolet Rays; D014574:Uronic Acids; D014774:Virulence
chemical_list: D009153:Mutagens; D014574:Uronic Acids; D008769:Methylnitronitrosoguanidine; D010368:Pectins; D001089:Arabinose; D004950:Esterases; D006026:Glycoside Hydrolases; D005690:Galactose