Symptoms similar to the cobweb disease were observed on beech mushrooms (Hypsizygus marmoreus') growing in Cheongdo-gun, Gyeongbuk Province, Korea, in May 2013. The causal agent was collected and cultured on potato dextrose agar media at different temperatures (5-30°C). The growth of the isolated fungus, characterized by the production of numerous sclerotia and red pigments, was temperature dependent, with minimum growth at 5°C and maximum growth at 25°C. A pathogenicity test revealed that the isolated fungus causes cobweb disease in the host mushroom H. marmoreus (white) as well as in three other mushrooms-H. marmoreus (brown), Flammulina velutipes, and Pleurotus eryngii-with massive mycelia and few conidia. Phylogenetic analysis of four genes (ITS, RPB1, RPB2, and TEF) showed that this isolate has a unique lineage and is distantly related to other species of Cladobotryum that cause the cobweb disease. The results showed that the isolated fungus is a new species, herein named Cladobotryum hypsigum, which causes cobweb disease in H. marmoreus in Korea.
|Number of pages||6|
|Journal||Journal of the Faculty of Agriculture, Kyushu University|
|Publication status||Published - Feb 1 2015|
All Science Journal Classification (ASJC) codes
- Agronomy and Crop Science