Journal
AGRONOMIE
Volume 23, Issue 5-6, Pages 407-418Publisher
EDP SCIENCES S A
DOI: 10.1051/agro:2003014
Keywords
rhizosphere; bacterization; methodology
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Some free-living rhizobacteria are considered as potential biocontrol and plant growth-promoting agents. Successful application of beneficial bacteria as microbial inoculants requires their presence and activity at the appropriate level, but even more, at the right time and place. Various markers are described in the literature to differentiate introduced bacteria from indigenous microflora and to visualize them. These markers are presented together with the methods currently applied to quantifying bacterial densities and to characterizing the distribution of introduced bacteria. The methods of quantifying bacterial densities are either based on bacterial cultivation or not. Different types of microscopic observations, allowing the characterization of the bacterial distribution and location in the rhizosphere, are also described. The respective advantages and limitations of these markers and methods are discussed.
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