Abstract
Stevia rebaudiana (Bertoni) Bertoni is a plant of economic interest in the food and pharmaceutical industries due its steviol glycosides (SG), which are rich in metabolites that are 300 times sweeter than sucrose. In addition, S. rebaudiana plants contain phenolic compounds and flavonoids with antioxidant activity. Endophytic bacteria promote the growth and development and modulate the metabolism of the host plant. However, little is known regarding the role of endophytic bacteria in the growth; synthesis of SG, flavonoids and phenolic compounds; and the relationship between trichome development and specialized metabolites in S. rebaudiana , which was the subject of this study. The 12 bacteria tested did not increase the growth of S. rebaudiana plants; however, the content of SG increased with inoculation with the bacteria Enterobacter hormaechei H2A3 and E. hormaechei H5A2. The SG content in leaves paralleled an increase in the density of glandular, short, and large trichome. The image analysis of S. rebaudiana leaves showed the presence of SG, phenolic compounds, and flavonoids principally in glandular and short trichomes. The increase in the transcript levels of the KO , KAH , UGT74G1 , and UGT76G1 genes was related to the SG concentration in plants of S. rebaudiana inoculated with E. hormaechei H2A3 and E. hormaechei H5A2. In conclusion, inoculation with the stimulating endophytes E. hormaechei H2A3 and E. hormaechei H5A2 increased SG synthesis, flavonoid content and flavonoid accumulation in the trichomes of S. rebaudiana plants.
Abstract from the paper’s OpenAlex record; open copy licensed cc-by. Read at the source ↗
The text the model read, with the source record’s inline markup (italics, sub- and superscripts) rendered and its character entities decoded; quote offsets refer to the raw text.
Claims 6
Claim · model-written summary
The 12 bacteria tested did not increase growth of Stevia rebaudiana plants.
- Taxon
- Stevia rebaudiana
Stevia rebaudianae0 - Treatment
- 12 bacteria testede1
- Outcome
- growthe1
- Direction
- did not increasee1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stevia rebaudiana (Bertoni) Bertoni is a plant of economic interest”
e1“The 12 bacteria tested did not increase the growth of S. rebaudiana plants”
Claim · model-written summary
Inoculation with Enterobacter hormaechei H2A3 and H5A2 increased steviol glycoside content in S. rebaudiana.
- Taxon
- S. rebaudianaStevia rebaudianae1
- Treatment
- inoculation with the bacteria Enterobacter hormaechei H2A3 and E. hormaechei H5A2e1
- Interactor
- Enterobacter hormaechei H2A3Enterobacter hormaecheie1symbiont
- Second interactor
- E. hormaechei H5A2Enterobacter hormaecheie1symbiont
- Outcome
- content of SGe1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stevia rebaudiana (Bertoni) Bertoni is a plant of economic interest”
e1“The 12 bacteria tested did not increase the growth of S. rebaudiana plants; however, the content of SG increased with inoculation with the bacteria Enterobacter hormaechei H2A3 and E. hormaechei H5A2”
Claim · model-written summary
Steviol glycoside content in leaves was associated with an increased density of glandular, short and large trichomes.
- Taxon
- Stevia rebaudianaStevia rebaudianae0
- Organ / stage
- leavese1
- Compound
- SGe1
- Outcome
- density of glandular, short, and large trichomee1
- Direction
- increasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Stevia rebaudiana (Bertoni) Bertoni is a plant of economic interest”
e1“The SG content in leaves paralleled an increase in the density of glandular, short, and large trichome”
Claim · model-written summary
Steviol glycosides, phenolic compounds and flavonoids were present principally in glandular and short trichomes of S. rebaudiana leaves.
- Taxon
- S. rebaudianaStevia rebaudianae1
- Organ / stage
- glandular and short trichomese1
- Outcome
- presence of SG, phenolic compounds, and flavonoidse1
- Qualifier
- principallye1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The image analysis of S. rebaudiana leaves showed the presence of SG, phenolic compounds, and flavonoids principally in glandular and short trichomes”
Claim · model-written summary
Increased transcript levels of KO, KAH, UGT74G1 and UGT76G1 were related to SG concentration in S. rebaudiana inoculated with E. hormaechei H2A3 and H5A2.
- Taxon
- S. rebaudianaStevia rebaudianae1
- Interactor
- E. hormaechei H2A3Enterobacter hormaecheie1symbiont
- Second interactor
- E. hormaechei H5A2Enterobacter hormaecheie1symbiont
- Gene
- KO , KAH , UGT74G1 , and UGT76G1e1
- Compound
- SGe1
- Outcome
- transcript levelse1
- Direction
- increasee1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“The increase in the transcript levels of the KO , KAH , UGT74G1 , and UGT76G1 genes was related to the SG concentration in plants of S. rebaudiana inoculated with E. hormaechei H2A3 and E. hormaechei H5A2”
Claim · model-written summary
Inoculation with the stimulating endophytes E. hormaechei H2A3 and H5A2 increased flavonoid content and flavonoid accumulation in the trichomes of S. rebaudiana.
- Taxon
- S. rebaudianaStevia rebaudianae1
- Treatment
- inoculation with the stimulating endophytes E. hormaechei H2A3 and E. hormaechei H5A2e1
- Interactor
- E. hormaechei H2A3Enterobacter hormaecheie1symbiont
- Second interactor
- E. hormaechei H5A2Enterobacter hormaecheie1symbiont
- Outcome
- flavonoid content and flavonoid accumulation in the trichomese1
- Direction
- increasede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e1“In conclusion, inoculation with the stimulating endophytes E. hormaechei H2A3 and E. hormaechei H5A2 increased SG synthesis, flavonoid content and flavonoid accumulation in the trichomes of S. rebaudiana plants”
The same questions in other papers
inoculation · growth · Stevia rebaudianaPositive and negative results
4 in the opposite direction
- positive
- positive
- positive
1 paper more in this group
See all 5 papers →inoculation · molecular: metabolites · Stevia rebaudianaResults agree
3 papers in the same direction as this paper
- positive
- 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.