Microbiol. Mol. Biol. Rev., Jun 1997, 121-135, Vol 61, No. 2
JA van Veen, LS van Overbeek and JD van Elsas
Introduced microorganisms are potentially powerful agents for manipulation
of processes and/or components in soil. Fields of application include
enhancement of crop growth, protection of crops against plant-pathogenic
organisms, stimulation of biodegradation of xenobiotic compounds
(bioaugmentation), and improvement of soil structure. Inoculation of soils
has already been applied for decades, but it has often yielded inconsistent
or disappointing results. This is caused mainly by a commonly observed
rapid decline in inoculant population activity following introduction into
soil, i.e., a decline of the numbers of inoculant cells and/or a decline of
the (average) activity per cell. In this review, we discuss the available
information on the effects of key factors that determine the fate and
activity of microorganisms introduced into soil, with emphasis on bacteria.
The factors addressed include the physiological status of the inoculant
cells, the biotic and abiotic interactions in soil, soil properties, and
substrate availability. Finally, we address the possibilities available to
effectively manipulate the fate and activity of introduced microorganisms
in relation to the main areas of their application.
Copyright © 1997, American Society for Microbiology
Fate and activity of microorganisms introduced into soil
IPO-DLO, GW Wageningen, The Netherlands.
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