Journal Article

Mushroom tumor: a new disease on Flammulina velutipes caused by Ochrobactrum pseudogrignonense

Wu, Zhipeng, He, Xiaolan, Wang, Bo, Peng, Weihong, Zhang, Xiaoping, Gan, Bingcheng

2016

Overview

Mushroom tumor on Flammulina velutipes has become the main disease during the off-season cultivation of F. velutipes while the causal organism has remained unknown. The present study was aimed at identifying the pathogen confirming its pathogenisity following Koch's Postulates, characterizing it using morphological, physiological, biochemical and molecular features, and studying its current distribution. We determined that mushroom tumor is a new bacterial infection disease caused by Ochrobactrum pseudogrignonense. It produces tumor-like structures on the surface of the substrate, and inhibits the formation of primordia and fruiting of F. velutipes. The molecular studies showed that this new pathogen is closely related to Ochrobactrum based on 16S rRNA sequences. This is the first time that Ochrobactrum has been shown to be a pathogen of a mushroom. Mushroom tumor is a new bacterial infection disease on Flammulina velutipes caused by Ochrobactrum pseudogrignonense.

• Publisher: Oxford University Press
• Subject: Bacterial diseases / Current distribution / Flammulina - chemistry / Flammulina - growth & development / Flammulina velutipes / Microbiology / Molecular Sequence Data / Mushrooms / Ochrobactrum - classification / Ochrobactrum - genetics / Ochrobactrum - isolation & purification / Ochrobactrum - physiology / Ochrobactrum pseudogrignonense / Off season cultivation / Pathogens / Phylogeny / Plant Tumors - microbiology / Primordia / rRNA 16S / Substrate inhibition / Tumors / Vegetables - microbiology