title: Effect of Casing Layer on Growth Promotion of the Edible Mushroom Pleurotus ostreatus.
abstract: Various bacteria were isolated from the casing layer soil of the culture bed of P. ostreatus and their role in fruiting body induction of the edible mushroom, P. ostreatus, was investigated. Analysis of the bacterial community isolated from the casing layer soil revealed that the composition of genera and number of cultivable bacteria were different for each sterilizing treatment. Bordetella was predominant in the bulk soil whereas Flavobacterium was predominant after sterilization of the casing layer soil. Fluorescent Pseudomonas was predominant in the non-sterilized casing layer soil. Total number of the bacterial genera in the casing layer soil was higher than that in the bulk soil. In particular, an increase in the fluorescent Pseudomonas population was observed in the non-sterilized casing layer accompanied by induction of fruiting body and enhanced mushroom production yield. The results suggested that specific bacterial populations in the casing layer play an important role in the formation of primodia and the development of basidiome in P. ostreatus.
authors.affiliation: Department of Applied Biochemistry, Konkuk University, Chungju 380-701, Korea.
authors.forename: Young Sub
authors.initials: YS
authors.lastname: Cho
authors.forename: Hang Yeon
authors.initials: HY
authors.lastname: Weon
authors.forename: Jung Ho
authors.initials: JH
authors.lastname: Joh
authors.forename: Jong Hyun
authors.initials: JH
authors.lastname: Lim
authors.forename: Kyung Yun
authors.initials: KY
authors.lastname: Kim
authors.forename: Eun Suk
authors.initials: ES
authors.lastname: Son
authors.forename: Chang Soo
authors.initials: CS
authors.lastname: Lee
authors.forename: Bong Gum
authors.initials: BG
authors.lastname: Cho
keywords: Casing layer soil; Mushroom growth promotion; Mushroom production; Pleurotus ostreatus