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Examining the fungal and bacterial niche overlap using selective inhibitors in soil.

Rousk, Johannes LU ; Aldén, Louise LU ; Bahr, Adam and Bååth, Erland LU (2008) In FEMS Microbiology Ecology 63(3). p.350-358
Abstract
It is important to know the contributions of bacteria and fungi to decomposition in connection with both the structure of the food web and the functioning of the ecosystem. However, the extent of the competition between these groups of organisms is largely unknown. The bacterial influence on fungal growth in a soil system was studied by applying three different bacterial inhibitors - bronopol, tylosin and oxytetracycline - in a series of increasing concentrations, and comparing the resulting bacterial and fungal growth rates measured using leucine and acetate-in-ergosterol incorporation, respectively. Direct measurements of growth showed that fungi increased after adding inhibitors; the level of increase in fungal growth corresponded to... (More)
It is important to know the contributions of bacteria and fungi to decomposition in connection with both the structure of the food web and the functioning of the ecosystem. However, the extent of the competition between these groups of organisms is largely unknown. The bacterial influence on fungal growth in a soil system was studied by applying three different bacterial inhibitors - bronopol, tylosin and oxytetracycline - in a series of increasing concentrations, and comparing the resulting bacterial and fungal growth rates measured using leucine and acetate-in-ergosterol incorporation, respectively. Direct measurements of growth showed that fungi increased after adding inhibitors; the level of increase in fungal growth corresponded to that of the decrease in bacterial growth, irrespective of the bacterial inhibitor used. Similar antagonistic effects of the bacteria on fungal growth were also found after adding the bacterial inhibitors together with additional substrate (alfalfa or straw plant material). The resulting responses in bacterial and fungal growth indirectly indicated that the negative interaction between fungi and bacteria was mostly attributable to exploitation competition. The results of this study also emphasize the increased sensitivity of using growth-related, instead of biomass-based, measurements when studying bacterial and fungal interactions in soil. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
FEMS Microbiology Ecology
volume
63
issue
3
pages
350 - 358
publisher
Elsevier
external identifiers
  • PMID:18205814
  • WOS:000252966300009
  • Scopus:38849114907
ISSN
1574-6941
DOI
10.1111/j.1574-6941.2008.00440.x
project
Interaction between fungi and bacteria in soil
Effect of environmental factors on fungal and bacterial growth in soil
Microbial carbon-use efficiency
language
English
LU publication?
yes
id
0a7d4e3f-dc5c-4a70-968b-5ea4e747057a (old id 1021278)
date added to LUP
2008-02-19 14:47:50
date last changed
2016-11-13 04:28:23
@misc{0a7d4e3f-dc5c-4a70-968b-5ea4e747057a,
  abstract     = {It is important to know the contributions of bacteria and fungi to decomposition in connection with both the structure of the food web and the functioning of the ecosystem. However, the extent of the competition between these groups of organisms is largely unknown. The bacterial influence on fungal growth in a soil system was studied by applying three different bacterial inhibitors - bronopol, tylosin and oxytetracycline - in a series of increasing concentrations, and comparing the resulting bacterial and fungal growth rates measured using leucine and acetate-in-ergosterol incorporation, respectively. Direct measurements of growth showed that fungi increased after adding inhibitors; the level of increase in fungal growth corresponded to that of the decrease in bacterial growth, irrespective of the bacterial inhibitor used. Similar antagonistic effects of the bacteria on fungal growth were also found after adding the bacterial inhibitors together with additional substrate (alfalfa or straw plant material). The resulting responses in bacterial and fungal growth indirectly indicated that the negative interaction between fungi and bacteria was mostly attributable to exploitation competition. The results of this study also emphasize the increased sensitivity of using growth-related, instead of biomass-based, measurements when studying bacterial and fungal interactions in soil.},
  author       = {Rousk, Johannes and Aldén, Louise and Bahr, Adam and Bååth, Erland},
  issn         = {1574-6941},
  language     = {eng},
  number       = {3},
  pages        = {350--358},
  publisher    = {ARRAY(0x9957720)},
  series       = {FEMS Microbiology Ecology},
  title        = {Examining the fungal and bacterial niche overlap using selective inhibitors in soil.},
  url          = {http://dx.doi.org/10.1111/j.1574-6941.2008.00440.x},
  volume       = {63},
  year         = {2008},
}