Abstract
Some of free-living rhizobacteria were isolated from rhizosphereof shallot growing in two different fields on Sulawesi Island. The bacterial isolates were cultured in liquid and solid media and were further tested for their ability to produce bioauxin. L-Tryptophan as a physiological precursor of auxin was added to the culture media and the production of IAA was tested using a colorimeter method. Six isolates from west Sulawesi and ten isolates from South Sulawesi were found to produce bioauxin, while 40 other isolates had negative results on IAA production. The amount of IAA produced by the isolates on liquid medium ranged from 4.01 to 8.62 ppm, while in the solid medium, the concentration of IAA produced by the same bacteria was considerably lower than in Liquid media. Thus, culture conditions influence the secretion of IAA by the bacteria. Of these 16 IAA producing isolates, five efficient producers were used for in plant a growth promotion assay. The isolate MK6-1-1 showed the best stimulatory effect on leaves number and bulb tillers, isolate LB8 was investigated to modulate better bulbs fresh biomass weight, while isolate MK11 was found to have the best effect on bulbs dry weight and bulbs dry biomass weight. Application of liquid media MK 6-1-1 bacteria isolates on the medium shallot planting early phases provides the best results on the vegetative growth of shallot that is leafs number (10.75 pieces) and the number of bulb tillers (2.75 bulbs) except the best plants height showed by Isolate bacteria MK 11 (29,60 cm). Bacterial isolates LB 8 shows bulbs fresh biomass weight (9.83 g) and bulbs fresh biomass shrinkage (7.45) while the bacteria Isolate MK 11 showed the best result of bulb dry weight (2.26 g) and bulbs dry biomass weight (3.41).
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Claims 14
Claim · model-written summary
Six western Sulawesi and ten South Sulawesi rhizobacterial isolates produced bioauxin.
- Taxon
- Shallot
Allium cepa var. aggregatumt0 - Interactor
- isolatese0symbiont
- Outcome
- produce bioauxine0
- Setting
- west Sulawesie0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six isolates from west Sulawesi and ten isolates from South Sulawesi were found to produce bioauxin, while 40 other isolates had negative results on IAA production.”
t0“Shallot Rhizosphere”
Claim · model-written summary
Forty other isolates did not produce IAA.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Interactor
- isolatese0symbiont
- Outcome
- negative results on IAA productione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Six isolates from west Sulawesi and ten isolates from South Sulawesi were found to produce bioauxin, while 40 other isolates had negative results on IAA production.”
t0“Shallot Rhizosphere”
Claim · model-written summary
Isolates produced 4.01 to 8.62 ppm IAA in liquid medium.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Interactor
- isolatese0symbiont
- Outcome
- IAA produced by the isolatese0
- Value
- 4.01 to 8.62 ppme0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of IAA produced by the isolates on liquid medium ranged from 4.01 to 8.62 ppm, while in the solid medium, the concentration of IAA produced by the same bacteria was considerably lower than in Liquid media.”
t0“Shallot Rhizosphere”
Claim · model-written summary
IAA production was lower in solid than liquid medium.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Treatment
- solid mediume0
- Outcome
- concentration of IAA produced by the same bacteriae0
- Direction
- lowere0
- Comparator
- Liquid mediae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The amount of IAA produced by the isolates on liquid medium ranged from 4.01 to 8.62 ppm, while in the solid medium, the concentration of IAA produced by the same bacteria was considerably lower than in Liquid media.”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for leaves number and bulb tillers.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Treatment
- MK6-1-1e0
- Interactor
- MK6-1-1e0symbiont
- Outcome
- leaves number and bulb tillerse0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The isolate MK6-1-1 showed the best stimulatory effect on leaves number and bulb tillers”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for bulbs fresh biomass weight.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Treatment
- LB8e0
- Interactor
- LB8e0symbiont
- Outcome
- bulbs fresh biomass weighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“isolate LB8 was investigated to modulate better bulbs fresh biomass weight”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for bulbs dry weight and bulbs dry biomass weight.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Treatment
- MK11e0
- Interactor
- MK11e0symbiont
- Outcome
- bulbs dry weight and bulbs dry biomass weighte0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“isolate MK11 was found to have the best effect on bulbs dry weight and bulbs dry biomass weight”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for leafs number.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Outcome
- leafs numbere0
- Value
- 10.75 piecese0
Not reportedInteractorInteractor roleTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“leafs number (10.75 pieces)”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for number of bulb tillers.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Outcome
- number of bulb tillerse0
- Value
- 2.75 bulbse0
Not reportedInteractorInteractor roleTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the number of bulb tillers (2.75 bulbs)”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for plants height.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Treatment
- MK 11e0
- Interactor
- MK 11e0symbiont
- Outcome
- plants heighte0
- Value
- 29,60 cme0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“plants height showed by Isolate bacteria MK 11 (29,60 cm)”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for bulbs fresh biomass weight.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Treatment
- LB 8e0
- Interactor
- LB 8e0symbiont
- Outcome
- bulbs fresh biomass weighte0
- Value
- 9.83 ge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacterial isolates LB 8 shows bulbs fresh biomass weight (9.83 g)”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for bulbs fresh biomass shrinkage.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Outcome
- bulbs fresh biomass shrinkagee0
- Value
- 7.45e0
Not reportedInteractorInteractor roleTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bulbs fresh biomass shrinkage (7.45)”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for bulb dry weight.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Treatment
- MK 11e0
- Interactor
- MK 11e0symbiont
- Outcome
- bulb dry weighte0
- Value
- 2.26 ge0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bacteria Isolate MK 11 showed the best result of bulb dry weight (2.26 g)”
t0“Shallot Rhizosphere”
Claim · model-written summary
Shallot growth response reported for bulbs dry biomass weight.
- Taxon
- ShallotAllium cepa var. aggregatumt0
- Outcome
- bulbs dry biomass weighte0
- Value
- 3.41e0
Not reportedInteractorInteractor roleTreatmentComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“bulbs dry biomass weight (3.41)”
t0“Shallot Rhizosphere”
The same questions in other papers
in vitro · Bacteria · Allium cepa (onion)Positive and negative results
1 in the opposite direction
- negative
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.