Abstract
Drought is more concerned to be a huge problem for agriculture as it affects plant growth and yield. Endophytic bacteria act as plant growth promoting bacteria that have roles for improving plant growth under stress conditions. The properties of four strains of endophytic bacteria were determined under water deficit medium with 20% polyethylene glycol. Bacillus aquimaris strain 3.13 showed high 1-aminocyclopropane-1-carboxylate (ACC) deaminase production; Micrococcus luteus strain 4.43 produced indole acetic acid (IAA). Exopolysaccharide production was high in Bacillus methylotrophicus strain 5.18 while Bacillus sp. strain 5.2 did not show major properties for drought response. Inoculation of endophytic bacteria into plants, strain 3.13 and 4.43 increased height, shoot and root weight, root length, root diameter, root volume, root area and root surface of Jerusalem artichoke grown under water limitation, clearly shown in water supply at 1/3 of available water. These increases were caused by bacteria ACC deaminase and IAA production; moreover, strain 4.43 boosted leaf area and chlorophyll levels, leading to increased photosynthesis under drought at 60 days of planting. The harvest index was high in the treatment with strain 4.43 and 3.13 under 1/3 of available water, promoting tuber numbers and tuber weight. Inulin content was unchanged in the control between well-watered and drought conditions. In comparison, inulin levels were higher in the endophytic bacteria treatment under both conditions, although yields dipped under drought. Thus, the endophytic bacteria promoted in plant growth and yield under drought; they had outstanding function in the enhancement of inulin content under wellwatered condition.
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Claims 13
Claim · model-written summary
Bacillus aquimaris strain 3.13 had high ACC deaminase production.
- Taxon
- Helianthus tuberosus L.
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Helianthus tuberosust0 - Interactor
- Bacillus aquimaris strain 3.13Rossellomorea aquimarise0symbiont
- Outcome
- 1-aminocyclopropane-1-carboxylate (ACC) deaminase productione0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Bacillus aquimaris strain 3.13 showed high 1-aminocyclopropane-1-carboxylate (ACC) deaminase production”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Micrococcus luteus strain 4.43 produced IAA.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Interactor
- Micrococcus luteus strain 4.43
Micrococcus luteuse0symbiont - Outcome
- indole acetic acid (IAA)e0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Micrococcus luteus strain 4.43 produced indole acetic acid (IAA).”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Bacillus methylotrophicus strain 5.18 had high exopolysaccharide production.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Interactor
- Bacillus methylotrophicus strain 5.18
Bacillus velezensise0symbiont - Outcome
- Exopolysaccharide productione0
- Direction
- highe0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exopolysaccharide production was high in Bacillus methylotrophicus strain 5.18”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Bacillus sp. strain 5.2 lacked major drought response properties.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Interactor
- Bacillus sp. strain 5.2e0symbiont
- Outcome
- major properties for drought responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Bacillus sp. strain 5.2 did not show major properties for drought response.”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Strain 3.13 increased height, shoot and root weight, and root dimensions under severe water limitation.
- Taxon
- Jerusalem artichokeHelianthus tuberosuse0
- Treatment
- strain 3.13e0
- Interactor
- strain 3.13e0symbiont
- Outcome
- height, shoot and root weighte0
- Direction
- increasede0
- Qualifier
- water supply at 1/3 of available watere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strain 3.13 and 4.43 increased height, shoot and root weight, root length, root diameter, root volume, root area and root surface of Jerusalem artichoke grown under water limitation, clearly shown in water supply at 1/3 of available water.”
Claim · model-written summary
Strain 4.43 increased height, shoot and root weight, and root dimensions under severe water limitation.
- Taxon
- Jerusalem artichokeHelianthus tuberosuse0
- Treatment
- 4.43e0
- Interactor
- 4.43e0symbiont
- Outcome
- height, shoot and root weighte0
- Direction
- increasede0
- Qualifier
- water supply at 1/3 of available watere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strain 3.13 and 4.43 increased height, shoot and root weight, root length, root diameter, root volume, root area and root surface of Jerusalem artichoke grown under water limitation, clearly shown in water supply at 1/3 of available water.”
Claim · model-written summary
Strain 4.43 increased leaf area and chlorophyll levels under drought.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Treatment
- strain 4.43e0
- Interactor
- strain 4.43e0symbiont
- Outcome
- leaf area and chlorophyll levelse0
- Direction
- boostede0
- Qualifier
- under drought at 60 days of plantinge0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strain 4.43 boosted leaf area and chlorophyll levels, leading to increased photosynthesis under drought at 60 days of planting.”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Strain 4.43 increased photosynthesis under drought.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Interactor
- strain 4.43e0symbiont
- Outcome
- photosynthesise0
- Direction
- increasede0
- Qualifier
- under drought at 60 days of plantinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“strain 4.43 boosted leaf area and chlorophyll levels, leading to increased photosynthesis under drought at 60 days of planting.”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Harvest index was high with strain 4.43 under severe water deficit.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Treatment
- strain 4.43e0
- Interactor
- strain 4.43e0symbiont
- Outcome
- harvest indexe0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The harvest index was high in the treatment with strain 4.43 and 3.13 under 1/3 of available water, promoting tuber numbers and tuber weight.”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Harvest index was high with strain 3.13 under severe water deficit.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Treatment
- 3.13e0
- Interactor
- 3.13e0symbiont
- Outcome
- harvest indexe0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The harvest index was high in the treatment with strain 4.43 and 3.13 under 1/3 of available water, promoting tuber numbers and tuber weight.”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Control inulin content was unchanged between well-watered and drought conditions.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Treatment
- drought conditionse0
- Outcome
- Inulin contente0
- Direction
- unchangede0
- Comparator
- well-waterede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Inulin content was unchanged in the control between well-watered and drought conditions.”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Bacterial treatment raised inulin levels under both water conditions.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Treatment
- endophytic bacteria treatmente0
- Interactor
- endophytic bacteriae0symbiont
- Outcome
- inulin levelse0
- Direction
- highere0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inulin levels were higher in the endophytic bacteria treatment under both conditions, although yields dipped under drought.”
t0“Helianthus tuberosus L.”
Claim · model-written summary
Yield fell under drought despite bacterial treatment.
- Taxon
- Helianthus tuberosus L.Helianthus tuberosust0
- Treatment
- droughte0
- Interactor
- endophytic bacteriae0symbiont
- Outcome
- yieldse0
- Direction
- dippede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“inulin levels were higher in the endophytic bacteria treatment under both conditions, although yields dipped under drought.”
t0“Helianthus tuberosus L.”
The same questions in other papers
drought · molecular: metabolites · Helianthus tuberosus (Jerusalem artichoke)Results differ
1 paper in the same direction as this paper · 2 in the opposite direction
- positive
- positive
- no effect
drought · yield · Helianthus tuberosus (Jerusalem artichoke)Positive and negative results
2 papers in the same direction as this paper · 1 in the opposite direction
- positive
- negative
- negative
inoculation · molecular: metabolites · Helianthus tuberosus (Jerusalem artichoke)Results agree
2 papers in the same direction as this paper
- 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.