PMID- 18312375
OWN - NLM
STAT- MEDLINE
DCOM- 20080618
LR  - 20240109
IS  - 0168-6496 (Print)
IS  - 0168-6496 (Linking)
VI  - 64
IP  - 1
DP  - 2008 Apr
TI  - Rhizosphere bacterial community composition responds to arbuscular mycorrhiza, 
      but not to reductions in microbial activity induced by foliar cutting.
PG  - 78-89
LID - 10.1111/j.1574-6941.2008.00447.x [doi]
AB  - Differences in bacterial community composition (BCC) between bulk and rhizosphere 
      soil and between rhizospheres of different plant species are assumed to be 
      strongly governed by quantitative and qualitative rhizodeposit differences. 
      However, data on the relationship between rhizodeposit amounts and BCC are 
      lacking. Other soil microorganisms, e.g. arbuscular mycorrhizal fungi (AMF), may 
      also influence BCC. We simulated foliar herbivory (cutting) to reduce belowground 
      carbon allocation and rhizodeposition of pea plants grown either with or without 
      AMF. This reduced soil respiration, rhizosphere microbial biomass and 
      bacteriovorous protozoan abundance, whereas none of these were affected by AMF. 
      After labelling plants with (13)CO(2), root and rhizosphere soil (13)C enrichment 
      of cut plants were reduced to a higher extent (24-46%) than shoot (13)C 
      enrichment (10-24%). AMF did not affect (13)C enrichment. Despite these clear 
      indications of reduced rhizosphere carbon-input, denaturing gradient gel 
      electrophoresis (DGGE) of 16S rRNA genes PCR-amplified targeting DNA and RNA from 
      rhizosphere soil did not reveal any effects of cutting on banding patterns. In 
      contrast, AMF induced consistent differences in both DNA- and RNA-based DGGE 
      profiles. These results show that a reduction in rhizosphere microbial activity 
      is not necessarily accompanied by changes in BCC, whereas AMF presence inhibits 
      proliferation of some bacterial taxa while stimulating others.
FAU - Vestergard, Mette
AU  - Vestergard M
AD  - Section for Terrestrial Ecology, Department of Biology, University of Copenhagen, 
      Copenhagen O, Denmark. mevmadsen@bi.ku.dk
FAU - Henry, Frederic
AU  - Henry F
FAU - Rangel-Castro, Juan Ignacio
AU  - Rangel-Castro JI
FAU - Michelsen, Anders
AU  - Michelsen A
FAU - Prosser, James I
AU  - Prosser JI
FAU - Christensen, Soren
AU  - Christensen S
LA  - eng
PT  - Journal Article
DEP - 20080226
PL  - England
TA  - FEMS Microbiol Ecol
JT  - FEMS microbiology ecology
JID - 8901229
RN  - 0 (Carbon Isotopes)
RN  - 142M471B3J (Carbon Dioxide)
SB  - IM
MH  - Bacteria/classification/genetics/*growth & development
MH  - Biomass
MH  - Carbon Dioxide/metabolism
MH  - Carbon Isotopes/metabolism
MH  - *Ecosystem
MH  - Electrophoresis/methods
MH  - Fungi/*growth & development
MH  - *Mycorrhizae
MH  - *Pisum sativum/growth & development/microbiology
MH  - Plant Roots/metabolism/*microbiology
MH  - *Soil Microbiology
EDAT- 2008/03/04 09:00
MHDA- 2008/06/19 09:00
CRDT- 2008/03/04 09:00
PHST- 2008/03/04 09:00 [pubmed]
PHST- 2008/06/19 09:00 [medline]
PHST- 2008/03/04 09:00 [entrez]
AID - FEM447 [pii]
AID - 10.1111/j.1574-6941.2008.00447.x [doi]
PST - ppublish
SO  - FEMS Microbiol Ecol. 2008 Apr;64(1):78-89. doi: 10.1111/j.1574-6941.2008.00447.x. 
      Epub 2008 Feb 26.