ORIGINAL ARTICLE
Effect of surface amino acids on the growth of Peltaster fructicola – fungus associated with sooty blotch complex
1
Agricultural University, Faculty of Horticulture, Department of Plant Pathology
Al. 29 Listopada 54, 31-425 Kraków, Poland;
2
Iowa State University, Department of Plant Pathology, Ames, Iowa 50011, USA
Corresponding author
Beata Wrona
Agricultural University, Faculty of Horticulture, Department of Plant Pathology Al. 29 Listopada 54, 31-425 Kraków, Poland;
Agricultural University, Faculty of Horticulture, Department of Plant Pathology Al. 29 Listopada 54, 31-425 Kraków, Poland;
Journal of Plant Protection Research 2005;45(4):273-278
KEYWORDS
Peltaster fructicolasooty blotchsurface amino acidssugarsapple skinconidial germinationgerm tubesC:N ratio
TOPICS
ABSTRACT
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)
CONFLICT OF INTEREST
The authors have declared that no conflict of interests exist.
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| eISSN: | 1899-007X |
| ISSN: | 1427-4345 |
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