Abstract
Gravitropism is affected by many exogenous factors such as environmental stresses. In the present study, the effect of ellagic acid (EA) on the gravitropic curvature of Arabidopsis thaliana (L.) Heynh. roots was characterized. Exogenous application of EA influenced root gravitropic responses in a concentration-dependent fashion. KI/I staining research revealed that the starch grain in the root cap was reduced by EA treatments. Simultaneously, expression of auxin-responsive reporter gene DR5::GFP showed that the auxin redistribution in roots treated with EA was less sensitive to that of control groups under gravity stimulus. Moreover, the expression of one of the auxin flux-facilitators—PIN2, was also suppressed by EA. Taken together, our results indicated that the effects of EA on root gravitropism were largely dependent on the reduction of starch grain and the disorder of lateral auxin redistribution.
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Claims 5
Claim · model-written summary
Ellagic acid influenced root gravitropic responses in a concentration-dependent manner.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Treatment
- EAe0
- Outcome
- root gravitropic responsese0
- Qualifier
- concentration-dependente0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Exogenous application of EA influenced root gravitropic responses in a concentration-dependent fashion.”
t0“Arabidopsis thaliana”
t1“Arabidopsis thaliana”
Claim · model-written summary
Ellagic acid reduced starch grains in the root cap.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Organ / stage
- root cape0
- Treatment
- EA treatmentse0
- Outcome
- starch graine0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the starch grain in the root cap was reduced by EA treatments.”
t0“Arabidopsis thaliana”
t1“Arabidopsis thaliana”
Claim · model-written summary
Auxin redistribution in ellagic acid-treated roots was less sensitive under gravity stimulus than controls.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- EAe0
- Outcome
- auxin redistributione0
- Direction
- less sensitivee0
- Qualifier
- under gravity stimuluse0
- Comparator
- control groupse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the auxin redistribution in roots treated with EA was less sensitive to that of control groups under gravity stimulus.”
t0“Arabidopsis thaliana”
t1“Arabidopsis thaliana”
Claim · model-written summary
Ellagic acid suppressed PIN2 expression.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- EAe0
- Gene
- PIN2e0
- Outcome
- expressione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the expression of one of the auxin flux-facilitators—PIN2, was also suppressed by EA.”
t0“Arabidopsis thaliana”
t1“Arabidopsis thaliana”
Claim · model-written summary
The authors attribute the gravitropic effect to reduced starch grains and disrupted lateral auxin redistribution.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Outcome
- root gravitropisme0
- Qualifier
- reduction of starch grain and the disorder of lateral auxin redistributione0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the effects of EA on root gravitropism were largely dependent on the reduction of starch grain and the disorder of lateral auxin redistribution.”
t0“Arabidopsis thaliana”
t1“Arabidopsis thaliana”