Rhizobacteria producing growth promoting substances as a bio-control agent against R. solani and F. solani causing root rot disease of tomato seedlings
Abstract: A number of 261 bacterial isolates were obtained from different plants rhizosphere. Majority of these isolates showed qualitative abilities to produce indole acetic acid (IAA), siderophores and hydrogen cyanide. Only 31 isolates (11.9%) showed in-vitro antagonistic activities against R. solani or F. solani the causative agents of root rot disease of tomato seedlings. Efficient isolates against the two pathogens R. solani and F. solani in-vitro were further tested for their abilities as biocontrol agents in a pot experiment. Pre and post emergence damping off, survival rate, shoot and root dry weight of tomato seedlings were determined. Tested isolates varied greatly in their in-vivo antagonistic activities against R. solani or F. solani as indexed by survival rate and also effects on shoot and root dry weights. These isolates were producers of IAA and gibberellins in-vitro and the majority of them produced siderophore and hydrogen cyanide. Most efficient four isolates against R. solani or F. solani and producing reasonable quanitities of growth promoting substances as well as sidereophores and cyanide were identified as strains of Bacillus subtilis (3 isolates) and Pseudomonase synxantha (one isolate)
Publication year 2005
Pages 47-62
Availability location Faculty of Agriculture, Ain Shams University, Shubra El-Khima, Cairo, Egypt.
Availability number
Organization Name
Country Egypt
City Shubra El-Khima, Cai
Publisher Name: Faculty of Agriculture, Ain Shams University, Shubra El-Khima, Cairo, Egypt.
serial title Annals Of Agricultural Science
ISSN 0570-1783
Volume 50 . 1
Department Agricultural Microbiology Research
Author(s) from ARC
External authors (outside ARC)
    شوقى محمود سليم كلية الزراعة - جامعة عين شمس
    محمود محمد زكى كلية الزراعة - جامعة عين شمس
Agris Categories Soil biology
AGROVOC
TERMS		 Bacillus subtilis. Biological control. Fusarium solani. Pseudomonas. Rhizobacteria. Rhizoctonia solani. Siderophores. Tomatoes.
Publication Type Journal
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