Abstract
The association of endophytic bacteria with their plant hosts has a beneficial effect for many different plant species. Our goal is to identify endophytic bacteria that improve the biomass production and the carbon sequestration potential of poplar trees (Populus spp.) when grown in marginal soil and to gain an insight in the mechanisms underlying plant growth promotion. Members of the Gammaproteobacteria dominated a collection of 78 bacterial endophytes isolated from poplar and willow trees. As representatives for the dominant genera of endophytic gammaproteobacteria, we selected Enterobacter sp. strain 638, Stenotrophomonas maltophilia R551-3, Pseudomonas putida W619, and Serratia proteamaculans 568 for genome sequencing and analysis of their plant growth-promoting effects, including root development. Derivatives of these endophytes, labeled with gfp, were also used to study the colonization of their poplar hosts. In greenhouse studies, poplar cuttings (Populus deltoides x Populus nigra DN-34) inoculated with Enterobacter sp. strain 638 repeatedly showed the highest increase in biomass production compared to cuttings of noninoculated control plants. Sequence data combined with the analysis of their metabolic properties resulted in the identification of many putative mechanisms, including carbon source utilization, that help these endophytes to thrive within a plant environment and to potentially affect the growth and development of their plant hosts. Understanding the interactions between endophytic bacteria and their host plants should ultimately result in the design of strategies for improved poplar biomass production on marginal soils as a feedstock for biofuels.
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Claims 3
Claim · model-written summary
Gammaproteobacteria dominated 78 endophytes isolated from poplar and willow trees.
- Interactor
- GammaproteobacteriaGammaproteobacteriae0symbiont
- Outcome
- dominated a collection of 78 bacterial endophytese0
PopulusOrganisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Members of the Gammaproteobacteria dominated a collection of 78 bacterial endophytes isolated from poplar and willow trees”
Claim · model-written summary
Enterobacter sp. strain 638 inoculation gave poplar cuttings the greatest biomass increase against uninoculated controls.
- Material
- Populus deltoides x Populus nigra DN-34e0
- Treatment
- inoculated with Enterobacter sp. strain 638e0
- Interactor
- Enterobacter sp. strain 638
Enterobacter sp.e0symbiont - Outcome
- biomass productione0
- Direction
- highest increasee0
- Comparator
- noninoculated control plantse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“poplar cuttings (Populus deltoides x Populus nigra DN-34) inoculated with Enterobacter sp. strain 638 repeatedly showed the highest increase in biomass production compared to cuttings of noninoculated control plants”
Claim · model-written summary
Sequence and metabolic analyses identified putative endophyte traits associated with thriving in plants and potentially influencing host growth.
Not reportedTaxon
Verbatim
e0“Sequence data combined with the analysis of their metabolic properties resulted in the identification of many putative mechanisms, including carbon source utilization, that help these endophytes to thrive within a plant environment and to potentially affect the growth and development of their plant hosts”
The same questions in other papers
inoculation · yield · Populus (poplar)Results agree
3 papers in the same direction as this paper
- positive
- positive
- positive
Claims are grouped by organism, treatment and what was measured or targeted. A paper counts as positive when any of its claims in the group is positive.