TY  - PRO
AU  - Halama,P.
AU  - Dumortier,V.
AU  - Ginkel,M.van|McNab,A.|Krupinsky,J.
AU  - Lalaoui,F.
AU  - Paul,B.
ED  - Centro Internacional de Mejoramiento de Maiz y Trigo (CIMMYT), Mexico DF (Mexico)
TI  - Aggressiveness of Phaeosphaeria nodorum isolates and their in vitro secretion of cell-wall-degrading enzymes
SN  - 970-648-035-8
U1  - 632.4 
PY  - 1999///
CY  - Mexico, DF (Mexico)
PB  - CIMMYT
KW  - Enzymes
KW  - Fungi
KW  - AGROVOC
KW  - Pathogens
KW  - Plant diseases
KW  - Statistical analysis
KW  - CIMMYT
N2  - The relationship between the in vitro production of cell-wall-degrading enzymes and the aggressiveness of three Phaeosphaeria nodorum isolates was studied. When grown in liquid medium containing 1% cell wall from wheat leaves as the only carbon source, the isolates secreted xylanase, ß-arabinosidase, ß-xylosidase, polygalacturonase, ß-galactosidase, cellulase, ß-1.3-glucanase, ß-glucosidase, acetyl-esterase, and butyrate-esterase. Time course experiments showed different levels of enzyme production and different kinetics between isolates. Xylanase, cellulase, polygalacturonase, and butyrate-esterase were positively correlated with isolate aggressiveness. The most aggressive isolate produced a higher proportion of xylanase than the other two isolates, suggesting the role of this enzyme in the pathogenesis of P. nodorum
ER  -