Abstract
The effect of three plant growth-promoting Bacillus strains inoculated either alone or as a consortium was tested on oat (Avena sativa) growth. The bioinoculants were applied as vegetative cells or endospores at low cell densities on the seeds and their effect was tested in sterile in vitro conditions, pot experiments, and a field trial. The in vitro seed germination assay showed that both individual bacterial inocula and bacterial consortia had positive effects on seed germination. Greenhouse pot experiments with sterile and non-sterile soil showed that consortia increased the total dry biomass of oat plants as compared to single strain inoculation and uninoculated controls. However, the positive impact on plant growth was less prominent when the bioinoculated strains had to compete with native soil microbes. Finally, the field experiment demonstrated that the consortium of vegetative cells was more efficient in promoting oat growth than the endospore consortium and the uninoculated control. Moreover, both consortia successfully colonized the roots and the rhizosphere of oat plants, without modifying the overall structure of the autochthonous soil microbial communities.
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Claims 6
Claim · model-written summary
Individual Bacillus inocula and consortia had positive effects on oat seed germination in vitro.
- Taxon
- oat
Avena sativae1 - Treatment
- individual bacterial inocula and bacterial consortiae0
- Interactor
- Bacillus strainse2symbiont
- Outcome
- seed germinatione0
- Direction
- increaseinferrede0
- Setting
- in vitroe3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both individual bacterial inocula and bacterial consortia had positive effects on seed germination”
e1“oat (Avena sativa)”
e2“three plant growth-promoting Bacillus strains”
e3“sterile in vitro conditions”
Claim · model-written summary
In greenhouse pot experiments, Bacillus consortia increased total dry biomass of oat plants compared with single-strain inoculation and uninoculated controls.
- Taxon
- oatAvena sativae0
- Treatment
- consortiae0
- Interactor
- Bacillus strainse2symbiont
- Outcome
- total dry biomasse0
- Direction
- increasede0
- Comparator
- single strain inoculation and uninoculated controlse0
- Setting
- Greenhouse pot experimentse3
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“consortia increased the total dry biomass of oat plants as compared to single strain inoculation and uninoculated controls”
e3“Greenhouse pot experiments with sterile and non-sterile soil”
e2“three plant growth-promoting Bacillus strains”
Claim · model-written summary
The positive impact of the inoculants on oat growth was less prominent when the strains had to compete with native soil microbes.
- Taxon
- oatAvena sativae1
- Outcome
- positive impact on plant growthe0
- Direction
- less prominente0
- Qualifier
- compete with native soil microbese0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the positive impact on plant growth was less prominent when the bioinoculated strains had to compete with native soil microbes”
e1“oat (Avena sativa)”
Claim · model-written summary
In a field experiment, the consortium of vegetative cells promoted oat growth more than the endospore consortium and the uninoculated control.
- Taxon
- oatAvena sativae0
- Treatment
- consortium of vegetative cellse0
- Interactor
- Bacillus strainse2symbiont
- Outcome
- promoting oat growthe0
- Direction
- more efficiente0
- Comparator
- endospore consortium and the uninoculated controle0
- Setting
- field experimente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the field experiment demonstrated that the consortium of vegetative cells was more efficient in promoting oat growth than the endospore consortium and the uninoculated control”
e2“three plant growth-promoting Bacillus strains”
Claim · model-written summary
Both consortia successfully colonized the roots and rhizosphere of oat plants.
- Taxon
- oatAvena sativae0
- Interactor
- Bacillus strainse2symbiont
- Outcome
- colonized the roots and the rhizospheree0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both consortia successfully colonized the roots and the rhizosphere of oat plants”
e2“three plant growth-promoting Bacillus strains”
Claim · model-written summary
The consortia did not modify the overall structure of the autochthonous soil microbial communities.
- Taxon
- oatAvena sativae1
- Outcome
- overall structure of the autochthonous soil microbial communitiese0
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“without modifying the overall structure of the autochthonous soil microbial communities”
e1“oat (Avena sativa)”
The same questions in other papers
inoculation · growth · Avena sativa (oats)Results differ
29 papers in the same direction as this paper · 2 in the opposite direction · 1 reporting no difference from an alternative
- no effect
- no effect
- no effect
29 papers more in this group
See all 33 papers →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.