TY - JOUR N2 - Studies undertaken in 2002–2004 on ‘Golden Delicious’ apple fruits showed the presence of amino acids on the surface of their skin. Amount of total free amino acids ranged from 2.5 to 3.0 mg/L. In in vitro bioassays it was found that amino acids as a basic source of nitrogen did not activate germination of conidia of Peltaster fructicola (Johnson). However amino acids stimulated elongation of germ tubes and early hyphal growth. It was confirmed that fruit washings also contained sugars that stimulated both conidial germination and germ tube elongation. We proved also that different carbon to nitrogen proportions significantly affected P. fructicola growth. Proportions of C:N were evaluated according to newly introduced amino acid sugar index (ASI) L1 - http://journals.pan.pl/Content/118628/PDF-MASTER/273-278_Effect%20of%20surface%20amino.pdf L2 - http://journals.pan.pl/Content/118628 PY - 2005 IS - No 4 EP - 278 KW - Peltaster fructicola KW - sooty blotch KW - surface amino acids KW - sugars KW - apple skin KW - conidial germination KW - germ tubes KW - C:N ratio A1 - Wrona, Beata A1 - Gleason, Mark PB - Committee of Plant Protection PAS PB - Institute of Plant Protection – National Research Institute VL - vol. 45 DA - 25.10.2005 T1 - Effect of surface amino acids on the growth of Peltaster fructicola – fungus associated with sooty blotch complex SP - 273 UR - http://journals.pan.pl/dlibra/publication/edition/118628 T2 - Journal of Plant Protection Research ER -