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A Hydroponic Co-cultivation System for Simultaneous and Systematic Analysis of Plant/Microbe Molecular Interactions and Signaling

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Which specificity in cooperation between phytostimulating rhizobacteria and plants?

Benoît Drogue¹, Hugo Doré, Stéphanie Borland

¹Université de Lyon, F-69622 Lyon, France.

Research in Microbiology

|September 20, 2012

Summary

Plant growth-promoting rhizobacteria (PGPR) may exhibit host specificity. This review explores evidence for specific interactions during plant attraction, root colonization, and symbiotic function between PGPR and plants.

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Area of Science:

Microbiology
Plant Science
Symbiosis

Background:

Plant growth-promoting rhizobacteria (PGPR) are common in plant-associated microbiomes.
Host specificity is well-documented for parasitic and mutualistic plant interactions.
Specificity in plant-associative symbiosis with PGPR is less understood.

Purpose of the Study:

To review existing evidence for host specificity in plant growth-promoting rhizobacteria.
To examine the stages of associative symbiosis establishment for potential specificity.

Main Methods:

Literature review of studies on plant-rhizobacteria interactions.
Analysis of mechanisms involved in plant-PGPR symbiosis.

Main Results:

Evidence suggests specificity in bacterial attraction by host plants.
Root colonization by PGPR may also be host-specific.
Functional aspects of the plant-PGPR symbiosis might involve specific interactions.

Conclusions:

Host specificity is likely a factor in plant growth-promoting rhizobacteria associations.
Further research is needed to fully elucidate the mechanisms of PGPR-plant specificity.