Characterization ofPhytophthora cinnamomipopulations from ornamental plants in South Carolina, USA

Autor:	C.-H. Duan, M. B. Riley, S. N. Jeffers
Rok vydání:	2008
Předmět:	South carolina Mating type Sporangium fungi Biology Phytophthora cinnamomi biology.organism_classification Fungicide chemistry.chemical_compound chemistry Ornamental plant Botany Amplified fragment length polymorphism Agronomy and Crop Science Fatty acid methyl ester
Zdroj:	Archives Of Phytopathology And Plant Protection. 41:14-30
ISSN:	1477-2906 0323-5408
DOI:	10.1080/03235400600628054
Popis:	Fifty-one isolates of Phytophthora cinnamomi isolated from ornamental plants in South Carolina, USA, between 1995 and 2000 were characterized by sporangium morphology, mating type, sensitivity to the fungicide mefenoxam, fatty acid methyl ester (FAME) profile analysis, and amplified fragment length polymorphism (AFLP) analysis. Sporangium shapes were predominantly ovoid to ellipsoid, and size averaged 65.5×40.3 μm (length×breadth) with average length/breadth ratio of 1.6. Forty-nine isolates were the A2 mating type with only two A1 isolates found. This is the first report of the A1 mating type of P. cinnamomi in South Carolina. All isolates were sensitive to mefenoxam and EC50 values for all isolates were less than 0.2 μg ml−1. FAMEs of each isolate were analysed by gas chromatography and revealed five major fatty acids: myristic (14:0), palmitic (16:0), linoleic (18:2ω6c), oleic (18:1ω9c), and eicosapentaenoic (20:5ω3c) acids. These five fatty acids accounted for more than 80% of FAME profiles. ...
Databáze:	OpenAIRE
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