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Title:Rhizoctonia disease of soybeans and its potential biological control by Bacillus megaterium
Author(s):Liu, Zonglin
Doctoral Committee Chair(s):Sinclair, James B.
Department / Program:Agriculture, Agronomy
Biology, Microbiology
Agriculture, Plant Pathology
Discipline:Agriculture, Agronomy
Biology, Microbiology
Agriculture, Plant Pathology
Degree Granting Institution:University of Illinois at Urbana-Champaign
Subject(s):Agriculture, Agronomy
Biology, Microbiology
Agriculture, Plant Pathology
Abstract:Three intraspecific groups (ISGs), ISG-2A, 2B, and 2C, of Rhizoctonia solani were proposed for 14 isolates of anastomosis group (AG) 2 based on isozyme analysis. These ISGs were fixed for deferent genotypes at aco locus and seemed to reflect genetic affinities. A highly virulent field isolate, 65L-2, was obtained and characterized as a member of AG-2-2 and ISG-2C. This isolate was deposited at The American Type Culture Collection as ATCC 66489.
Bacillus megaterium B153-2-2, a rhizobacterium, was isolated from a soybean crown and characterized as a potential biological control agent. It was able to colonize soybean root system and the root zone and survived the winter in the field. This train was antagonistic to a wide range of soil fungal pathogens in culture and reduced the population of R. solani inoculum in the soil and suppressed Rhizoctonia root rot of soybeans in the greenhouse and field. It also enhanced soybean root growth and nodulation by Bradyrhizobium japonicum. Spacial and temporal distribution models of this bacterium on the roots of soybeans and in the root zone were developed.
B. megaterium B153-2-2 was deposited at The American Type Culture Collection as ATCC 55000.
Issue Date:1990
Rights Information:Copyright 1990 Liu, Zonglin
Date Available in IDEALS:2011-05-07
Identifier in Online Catalog:AAI9114326
OCLC Identifier:(UMI)AAI9114326

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