Mycobiology.  2007 Jun;35(2):91-96.

Characterization of Fusarium oxysporum Isolated from Paprika in Korea

• Cha SD
• Jeon YJ
• Ahn GR
• Han JI
• Han KH
• Kim SH

Abstract

In the present study we first report in Korea the identification and characterization of Fusarium oxysporum isolated from rotten stems and roots of paprika (Capsicum annuum var. grossum) at Masan, Kyungsangnamdo in 2006. The fungal species produced white aerial mycelia accompanying with dark violet pigment on PDA. The optimal temperature and pH for the growth of the species was 25degrees C and pH 7, respectively. Microscopic observation of one of isolates of the species shows that its conidiophores are unbranched and monophialides, its microconidia have oval-ellipsoidal shape with no septate and are of 3.0~11 x 1.5~3.5 microm sizes, its macroconidia are of 15~20 x 2.0~3.5 microm sizes and have slightly curved or slender shape with 2~3 septate. The results of molecular analysis show that the ITS rDNA of F. oxysporum from paprika shares 100% sequence identity with that of known F. oxysporum isolates. The identified species proved it's pathogenicity by causing rotting symptom when it was inoculated on paprika fruits. The growth of F. oxysporum from paprika was suppressed on PDA by agrochemicals such as benomyl, tebuconazole and azoxystrobin. The identified species has the ability of producing extracelluar enzymes that degrade cellobiose and pectin.

Keyword

Extracelluar enzymes; Fusarium oxysporum; Fungicides; Paprika

MeSH Terms

Agrochemicals
Benomyl
Capsicum*
Cellobiose
DNA, Ribosomal
Fruit
Fusarium*
Gyeongsangnam-do
Hydrogen-Ion Concentration
Korea*
Viola
Virulence
Agrochemicals
Benomyl
Cellobiose
DNA, Ribosomal