Abstract
Helianthus tuberosus L. (Jerusalem artichoke) produce inulin, a type of fructan, which possesses several biotechnology applications, e.g., sugar syrup, prebiotics, fiber in diabetic food, enabling blood sugar and cholesterol reduction. Drought reduces inulin accumulation in the tubers of Jerusalem artichoke as the plants protect themselves from this stress by induction of stress gene responses, effecting growth reduction. Endophytic bacteria are promising candidates to promote plant growth and yield particularly under abiotic stress. Therefore, three endophytic bacteria with plant growth promoting properties were examined for their ability to improve Jerusalem artichoke growth and yield under both well-watered and drought conditions when inoculated individually or in combinations in pot experiments with 2 factorial random complete block design. The interactions of the endophytic bacteria and plant host determined the differential gene expression in response to drought as revealed by quantitative polymerase chain reaction. Single inoculum of the endophytic bacteria increased the height, weight, root traits, and harvest index of Jerusalem artichoke compared to co-inocula under both well-watered and drought conditions. However, the co-inocula of Rossellomorea aquimaris strain 3.13 and Bacillus velezensis strain 5.18 proved to be a synergistic combination leading to high inulin accumulation; while the co-inocula of B. velezensis strain 5.18 and Micrococcus luteus strain 4.43 were not beneficial when used in combination. The genes, dehydrin like protein and ethylene responsive element binding factor, were upregulated in the plants inoculated with single inoculum and co-inocula of all endophytic bacteria during drought stress. Moreover, the gene expression of indole-3-acetic acid (IAA) amido synthetase were up-regulated in Jerusalem artichoke inoculated with M. luteus strain 4.43 during drought stress. The fructan:fructan 1-fructosyltransferase (1-FFT) was also stimulated by the endophytic bacteria particularly in drought condition; the results of this study could explain the relationship between endophytic bacteria and plant host for growth and yield promotion under well-watered and drought conditions.
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Claims 7
Claim · model-written summary
Single bacterial inocula increased height, weight and root traits relative to co-inocula under both watering conditions.
- Taxon
- Jerusalem artichoke
.jpg?width=60)
Helianthus tuberosuse0 - Treatment
- Single inoculum of the endophytic bacteriae0
- Outcome
- height, weight, root traitse0
- Direction
- increasede0
- Qualifier
- under both well-watered and drought conditionse0
- Comparator
- co-inoculae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e0“Single inoculum of the endophytic bacteria increased the height, weight, root traits, and harvest index of Jerusalem artichoke compared to co-inocula under both well-watered and drought conditions.”
Claim · model-written summary
Single bacterial inocula increased harvest index relative to co-inocula.
- Taxon
- Jerusalem artichokeHelianthus tuberosuse0
- Treatment
- Single inoculum of the endophytic bacteriae0
- Outcome
- harvest indexe0
- Direction
- increasede0
- Comparator
- co-inoculae0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Single inoculum of the endophytic bacteria increased the height, weight, root traits, and harvest index of Jerusalem artichoke compared to co-inocula under both well-watered and drought conditions.”
Claim · model-written summary
The R. aquimaris and B. velezensis co-inoculum led to high inulin accumulation.
- Taxon
- Jerusalem artichokeHelianthus tuberosust0
- Treatment
- co-inocula of Rossellomorea aquimaris strain 3.13 and Bacillus velezensis strain 5.18e0
- Interactor
- Rossellomorea aquimaris strain 3.13Rossellomorea aquimarise0symbiont
- Second interactor
- Bacillus velezensis strain 5.18
Bacillus velezensise0symbiont - Outcome
- inulin accumulatione0
- Direction
- highe0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the co-inocula of Rossellomorea aquimaris strain 3.13 and Bacillus velezensis strain 5.18 proved to be a synergistic combination leading to high inulin accumulation”
t0“Jerusalem artichoke”
Claim · model-written summary
The B. velezensis and M. luteus combination was not beneficial.
- Taxon
- Jerusalem artichokeHelianthus tuberosust0
- Treatment
- co-inocula of B. velezensis strain 5.18 and Micrococcus luteus strain 4.43e0
- Interactor
- B. velezensis strain 5.18Bacillus velezensise0symbiont
- Second interactor
- Micrococcus luteus strain 4.43
Micrococcus luteuse0symbiont - Outcome
- not beneficiale0
- Direction
- not beneficiale0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the co-inocula of B. velezensis strain 5.18 and Micrococcus luteus strain 4.43 were not beneficial when used in combination.”
t0“Jerusalem artichoke”
Claim · model-written summary
Single and combined endophyte inocula upregulated dehydrin like protein and ethylene responsive element binding factor genes during drought.
- Taxon
- Jerusalem artichokeHelianthus tuberosust0
- Treatment
- single inoculum and co-inocula of all endophytic bacteriae0
- Outcome
- dehydrin like protein and ethylene responsive element binding factore0
- Direction
- upregulatede0
- Qualifier
- during drought stresse0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The genes, dehydrin like protein and ethylene responsive element binding factor, were upregulated in the plants inoculated with single inoculum and co-inocula of all endophytic bacteria during drought stress.”
t0“Jerusalem artichoke”
Claim · model-written summary
M. luteus inoculation upregulated IAA amido synthetase expression during drought.
- Taxon
- Jerusalem artichokeHelianthus tuberosuse0
- Treatment
- inoculated with M. luteus strain 4.43e0
- Interactor
- M. luteus strain 4.43Micrococcus luteuse0symbiont
- Outcome
- gene expression of indole-3-acetic acid (IAA) amido synthetasee0
- Direction
- up-regulatede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the gene expression of indole-3-acetic acid (IAA) amido synthetase were up-regulated in Jerusalem artichoke inoculated with M. luteus strain 4.43 during drought stress.”
Claim · model-written summary
Endophytic bacteria stimulated 1-FFT, particularly during drought.
- Taxon
- Jerusalem artichokeHelianthus tuberosust0
- Treatment
- endophytic bacteriae0
- Outcome
- fructan:fructan 1-fructosyltransferase (1-FFT)e0
- Direction
- stimulatede0
- Qualifier
- particularly in drought conditione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The fructan:fructan 1-fructosyltransferase (1-FFT) was also stimulated by the endophytic bacteria particularly in drought condition”
t0“Jerusalem artichoke”
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1 paper more in this group
See all 5 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.