Abstract
Abstract The effect of strains EPS291 and EPS817 of Pseudomonas fluorescens to improve plant growth and nutrition as well as to reduce root‐knot nematode in roots was investigated in micropropagated banana. Plantlets, cultured under commercial nursery conditions, were treated twice with bacteria after transplanting from in vitro conditions. Bacterial application was performed by drenching bacterial suspension containing approximately 10 8 CFU (colony‐forming units) g −1 of substrate. Both strains significantly increased aerial fresh weight, plant length and leaf area, while the effect on other growth parameters depended on the strain. N content was also significantly increased after both bacteria treatments. A second experiment was performed to determine the potential biocontrol effect against the root‐knot nematode Meloidogyne javanica . Following the same experimental conditions, Meloidogyne inoculum containing 10 500 nematodes was applied 15 days after the second bacteria treatment. At the end of the experiment, 135 days later, nematode reproduction in roots of bacterised bananas was significantly reduced. In both experiments, the inoculated bacteria colonised the root system and population levels in root, 5.5 months after transplanting were 6.8 × 10 3 to 1.6 × 10 4 CFU g −1 fresh weight of root. The potential use of this technology to improve hardening stages in banana plant production in commercial nurseries is discussed.
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Claims 5
Claim · model-written summary
Both bacterial strains significantly increased aerial fresh weight, plant length, and leaf area of banana.
- Taxon
- bananat0
- Treatment
- strains EPS291 and EPS817 of Pseudomonas fluorescense1
- Interactor
- Pseudomonas fluorescens
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Pseudomonas fluorescense1biocontrol_agent - Outcome
- aerial fresh weight, plant length and leaf areae0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.JPG?width=500)
Verbatim
e0“Both strains significantly increased aerial fresh weight, plant length and leaf area”
t0“banana”
e1“strains EPS291 and EPS817 of Pseudomonas fluorescens”
Claim · model-written summary
Other growth responses depended on bacterial strain.
Not reportedComparatorDirection
Verbatim
e0“the effect on other growth parameters depended on the strain.”
t0“banana”
Claim · model-written summary
Both bacterial treatments significantly increased banana nitrogen content.
- Taxon
- bananat0
- Treatment
- bacteria treatmentse0
- Interactor
- Pseudomonas fluorescensPseudomonas fluorescense1biocontrol_agent
- Outcome
- N contente0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“N content was also significantly increased after both bacteria treatments.”
t0“banana”
e1“strains EPS291 and EPS817 of Pseudomonas fluorescens”
Claim · model-written summary
Bacterial treatment significantly reduced Meloidogyne javanica reproduction in banana roots.
- Taxon
- bananase0
- Treatment
- bacterisede0
- Interactor
- Meloidogyne javanicaMeloidogyne javanicae1pest
- Outcome
- nematode reproduction in rootse0
- Direction
- reducede0
Not reportedComparator
Verbatim
e0“nematode reproduction in roots of bacterised bananas was significantly reduced.”
e1“root‐knot nematode Meloidogyne javanica”
Claim · model-written summary
Inoculated bacteria colonized banana roots and reached 6.8 × 10 3 to 1.6 × 10 4 CFU g −1 fresh root weight.
- Taxon
- bananat0
- Interactor
- Pseudomonas fluorescensPseudomonas fluorescense1biocontrol_agent
- Outcome
- population levels in roote0
- Value
- 6.8 × 10 3 to 1.6 × 10 4 CFU g −1 fresh weight of roote0
- Qualifier
- 5.5 months after transplantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the inoculated bacteria colonised the root system and population levels in root, 5.5 months after transplanting were 6.8 × 10 3 to 1.6 × 10 4 CFU g −1 fresh weight of root.”
t0“banana”
e1“strains EPS291 and EPS817 of Pseudomonas fluorescens”
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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.