Mycobiology.  2006 Sep;34(3):154-157. 10.4489/MYCO.2006.34.3.154.

Characterization of Sclerotinia sclerotiorum Isolated from Paprika

• Jeon YJ
• Kwon HW
• Nam JS
• Kim SH

• KMID: 1598826
• DOI: http://doi.org/10.4489/MYCO.2006.34.3.154

Abstract

A fungal isolate collected from infected paprika (Capsicum annuum var. grossum) was characterized as Sclerotinia sclerotiorum based on its ability of sclerotium formation, physiological and molecular properties. When the isolate was grown on potato dextrose agar, oatmeal agar, and malt extract agar, it grew most well on PDA. Optimal temperature and pH for its growth were 25degrees C and pH 7, respectively. The fungal isolate produced sclerotia on PDA within 10 days, and the color and shape of the sclerotia were similar to those of S. sclerotiorum . The ITS rDNA regions including ITS1 and ITS2 and 5.8S sequences were amplified using ITS1F and ITS4 primers from the genomic DNAs of the paprika isolate and other known pathogenic S. sclerotiorum isolated from different crops in Korea, and their nucleotide sequences were determined. Sequence comparison analysis showed the ITS rDNA of the paprika isolate shares 100% sequence identity with those of S. sclerotiorum isolated from red pepper, lettuce and a S. sclerotiorum isolate registered in GenBank DNA database. Neighbor joining analysis based on the ITS rDNA sequence revealed the paprika isolate has very close phylogenetic relationships with known Sclerotinia sclerotiorum isolates. This is the first report that S. sclerotiorum has been found associated with paprika rot in paprika growing countries.

Keyword

ITS rDNA; Paprika; Sclerotinia sclerotiorum; Stem rot

MeSH Terms

Agar
Ascomycota*
Base Sequence
Capsicum*
Databases, Nucleic Acid
DNA
DNA, Ribosomal
Glucose
Hydrogen-Ion Concentration
Korea
Lettuce
Solanum tuberosum
Agar
DNA
DNA, Ribosomal
Glucose