University of Illinois Urbana-Champaign

Rhizoctonia disease of soybeans and its potential biological control by Bacillus megaterium

Liu, Zonglin

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Description

Title
Rhizoctonia disease of soybeans and its potential biological control by Bacillus megaterium
Author(s)
Liu, Zonglin
Issue Date
1990
Doctoral Committee Chair(s)
Sinclair, James B.
Department of Study
  • Agriculture, Agronomy
  • Biology, Microbiology
  • Agriculture, Plant Pathology
Discipline
  • Agriculture, Agronomy
  • Biology, Microbiology
  • Agriculture, Plant Pathology
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
  • Agriculture, Agronomy
  • Biology, Microbiology
  • Agriculture, Plant Pathology
Language
eng
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.
Type of Resource
text
Permalink
http://hdl.handle.net/2142/22366
Copyright and License Information
Copyright 1990 Liu, Zonglin

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