Journal article
Survival of inoculated Bacillus cereus spores and vegetative cells in non-planted and rhizosphere soil
Soil Biology and Biochemistry, Vol.27(8), pp.1017-1026
1995
Abstract
The survival of vegetative cells and spores of an antibiotic-resistant Bacillus cereus (B11) inoculant was similar in wheat rhizosphere soil and non-planted soil over a period of 21 d. Reliable ways of producing either spore or vegetative single cell inocula were developed. When applied to give densities ranging from 1 × 102 to 1 × 107 g-1 soil, B11 spores survived for at least 21 d at levels similar to those introduced but numbers of vegetative cells decreased by 1-2 orders of magnitude within the first 48 h and the extent of decrease was proportionately greater at low inoculum density. There was no significant difference after 21 d between total counts (vegetative cells + spores) or spore counts in either the rhizosphere or non-planted soil, regardless of whether the inoculant was composed of vegetative or spore cells. There was no difference between the changing spore-to-vegetative cell ratio within total cell counts between rhizosphere and non-planted soil. Inoculating soil with a mixture of Bacillus B11 (2 × 107 g-1), Flavobacterium P25 (3 × 108 g-1) and Arthrobacter A109 (2 × 108 g-1) increased the survival of P25 and A109 but decreased the survival of B11 in both non-planted and rhizosphere soil compared with each bacterium inoculated alone. For example, at day 21 in rhizosphere soil there were 1 × 106 g-1 A109 (single inoculant) and 1 × 107 g-1 A109 (mixed inoculum) and in non-planted soil 1 × 105 g-1 (single) and 1 × 107 g-1 (mixed). Thus, neither the survival nor the physiological state of Bacillus B11 was affected by the presence of developing wheat roots but survival was negatively affected by the presence of other inoculants. © 1995.
Details
- Title
- Survival of inoculated Bacillus cereus spores and vegetative cells in non-planted and rhizosphere soil
- Authors
- C S Young (Author) - University of Kent, United KingdomG Lethbridge (Author) - Shell Research Limited, United KingdomL J Shaw (Author) - University of Kent, United KingdomRichard G Burns (Author) - University of Kent, United Kingdom
- Publication details
- Soil Biology and Biochemistry, Vol.27(8), pp.1017-1026
- Publisher
- Pergamon
- Date published
- 1995
- DOI
- 10.1016/0038-0717(95)00030-I
- ISSN
- 0038-0717
- Organisation Unit
- University of the Sunshine Coast, Queensland; Office of the Deputy Vice-Chancellor (Research and Innovation)
- Language
- English
- Record Identifier
- 99449826002621
- Output Type
- Journal article
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