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Plant colonization by pink-pigmented facultative methylotrophic bacteria (PPFMs)
Zahra S Omer1, Riccardo Tombolini, Berndt Gerhardson
1Plant Pathology and Biocontrol Unit, Uppsala, Sweden. zahra.saad.omer@vpat.slu.se
FEMS Microbiology Ecology
|August 29, 2009
Summary
Pink-pigmented facultative methylotrophic bacteria (PPFMs) colonize plants like red clover and winter wheat. Their populations vary seasonally, but they show potential for agricultural applications through inoculation.
Area of Science:
- Microbiology
- Plant Science
- Environmental Science
Background:
- Pink-pigmented facultative methylotrophic bacteria (PPFMs) utilize methanol as their primary energy source.
- PPFMs are common in the phyllosphere but often overlooked due to slow growth.
- Their ecological roles and impact on host plants are not well understood.
Purpose of the Study:
- To investigate PPFM colonization patterns in agricultural environments.
- To assess the colonization potential of PPFMs on different plant species and in the rhizosphere.
- To understand the seasonal dynamics of PPFM populations.
Main Methods:
- Field surveys of PPFM populations on red clover and winter wheat.
- Greenhouse experiments to test cross-colonization between plant species.
- Seed inoculation trials to evaluate rhizosphere colonization.
- Confocal scanning laser microscopy using GFP-tagged isolates.
Main Results:
- Red clover exhibited more consistent PPFM colonization than winter wheat.
- PPFM populations decreased from spring to summer and increased by the end of the season.
- PPFMs successfully colonized both phyllosphere and rhizosphere, with colonization influenced by application methods.
Conclusions:
- PPFMs are prevalent in agricultural phyllosphere environments.
- Seasonal variations and plant-specific colonization dynamics were observed.
- PPFMs demonstrate potential for agricultural applications, particularly via seed inoculation for rhizosphere colonization.
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