First Report of Potato Stem-End Rot Caused by Fusarium oxysporum in Korea
Mycobiology
;
: 206-209, 2014.
Article
Dans Anglais
| WPRIM
| ID: wpr-729221
ABSTRACT
In this study, we identified the causative agent of stem-end rot in potatoes that were grown in Gangwon alpine areas of Korea in 2013. The disease symptoms included appearance of slightly sunken circular lesion with corky rot on the potato surface at the stem-end portion. The fungal species isolated from the infected potatoes were grown on potato dextrose agar and produced white aerial mycelia with dark violet pigments. The conidiophores were branched and monophialidic. The microconidia had ellipsoidal to cylindrical shapes and ranged from 2.6~11.4 x 1.9~3.5 microm in size. The macroconidia ranged from 12.7~24.7 x 2.7~3.6 microm in size and had slightly curved or fusiform shape with 2 to 5 septate. Chlamydospores ranged from 6.1~8.1 x 5.7~8.3 microm in size and were present singly or in pairs. The causal agent of potato stem-end rot was identified as Fusarium oxysporum by morphological characterization and by sequencing the internal transcribed spacer (ITS1 and ITS4) regions of rRNA. Artificial inoculation of the pathogen resulted in development of disease symptoms and the re-isolated pathogen showed characteristics of F. oxysporum. To the best of our knowledge, this is the first study to report that potato stem-end rot is caused by F. oxysporum in Korea.
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
Sujet Principal:
Virulence
/
Solanum tuberosum
/
Agar-agar
/
Viola
/
Fusarium
/
Glucose
/
Corée
Type d'étude:
Étude pronostique
Pays comme sujet:
Asie
langue:
Anglais
Texte intégral:
Mycobiology
Année:
2014
Type:
Article
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