Are root exudates more important than other sources of rhizodeposits in structuring rhizosphere bacterial communities?

A - Papers appearing in refereed journals

Dennis, P. G., Miller, A. J. and Hirsch, P. R. 2010. Are root exudates more important than other sources of rhizodeposits in structuring rhizosphere bacterial communities? FEMS Microbiology Ecology. 72 (3), pp. 313-327.

AuthorsDennis, P. G., Miller, A. J. and Hirsch, P. R.
Abstract

This review evaluates the importance of root exudates in determining rhizosphere bacterial community structure. We present evidence that indicates that: (1) the direct influence of root exudates on rhizosphere bacterial communities is limited to small spatiotemporal windows related to root apices; (2) upon rapid assimilation by microorganisms, root exudates are modified, independent of plant influences, before rerelease into the rhizosphere by the microorganisms themselves - thus, at short distances from root apices, rhizosphere carbon pools are unlikely to be dominated by root exudates; and (3) many of the major compounds found in root exudates are ubiquitous in the rhizosphere as they are found in other pools of rhizodeposits and in microbial exudates. Following this argument, we suggest that the importance of root exudates in structuring rhizosphere bacterial communities needs to be considered in the context of the wider contribution of other rhizosphere carbon pools. Finally, we discuss the implications of rhizosphere bacterial distribution trends for the development of effective strategies to manage beneficial plant-microorganism interactions.

KeywordsMicrobiology
Year of Publication2010
JournalFEMS Microbiology Ecology
Journal citation72 (3), pp. 313-327
Digital Object Identifier (DOI)doi:10.1111/j.1574-6941.2010.00860.x
PubMed ID20370828
Open accessPublished as non-open access
FunderBiotechnology and Biological Sciences Research Council
Natural History Museum, London
Funder project or codeSEF
Soil microbial community function and diversity
Project: 4967
PublisherWiley
Oxford University Press (OUP)
ISSN0168-6496

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