Abstract
AbstractSucrose transporters (SUCs/SUTs) play crucial roles in apoplast transport and long-distance distribution of sucrose throughout the whole plant. However, whether and how the Arabidopsis AtSUC4 modulates sucrose import from apoplast to cytosol remains unclear. In the present study, we found that AtSUC4 protein was localized to the plasma membrane in the root. Expression of AtSUC4 in roots was gradually induced with the increasing sucrose concentrations (0%, 2%, 4% and 6%). When feeding high concentrations (4% and 6%) of sucrose, the primary root growth of seedling was inhibited. Interestingly, atsuc4 mutants exhibited longer primary root than the wild type under these conditions, indicating that atsuc4 mutants were less sensitive to excess sucrose. Moreover, the root of atsuc4 mutants accumulated less sucrose and abscisic acid (ABA) and more indole-3-acetic acid (IAA) on 4% and 6% sucrose supplementation. Transcriptomic analysis revealed that numerous genes associated with sugar transport and metabolism, as well as ABA signalling were down-regulated, whereas many IAA signaling-related genes were up-regulated in mutant plants relative to the wild type under 6% sucrose treatment. Collectively, our finding demonstrated that the deficiency of AtSUC4 reduced the inhibition of primary root growth under high sucrose condition, probably through reducing the sucrose transportation and metabolism, and subsequent alteration in IAA and ABA signalling.
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Claims 8
Claim · model-written summary
AtSUC4 protein localized to the plasma membrane in roots.
- Taxon
- Arabidopsis
Arabidopsist0 - Organ / stage
- roote0
- Gene
- AtSUC4e0
- Outcome
- localized to the plasma membranee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“AtSUC4 protein was localized to the plasma membrane in the root.”
t0“Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation”
Claim · model-written summary
Root AtSUC4 expression rose with sucrose concentration.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- increasing sucrose concentrations (0%, 2%, 4% and 6%)e0
- Gene
- AtSUC4e0
- Outcome
- Expression of AtSUC4e0
- Direction
- gradually inducede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Expression of AtSUC4 in roots was gradually induced with the increasing sucrose concentrations (0%, 2%, 4% and 6%).”
t0“Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation”
Claim · model-written summary
High sucrose inhibited primary root growth.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- high concentrations (4% and 6%) of sucrosee0
- Outcome
- primary root growthe0
- Direction
- inhibitede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“When feeding high concentrations (4% and 6%) of sucrose, the primary root growth of seedling was inhibited.”
t0“Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation”
Claim · model-written summary
Under high sucrose, atsuc4 mutants had longer primary roots than wild type.
- Taxon
- ArabidopsisArabidopsist0
- Material
- atsuc4 mutantse0
- Outcome
- primary roote0
- Direction
- longere0
- Comparator
- wild typee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“atsuc4 mutants exhibited longer primary root than the wild type under these conditions”
t0“Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation”
Claim · model-written summary
Under sucrose supplementation, mutant roots accumulated less sucrose and ABA than wild type.
- Taxon
- ArabidopsisArabidopsist0
- Material
- atsuc4 mutantse0
- Outcome
- sucrose and abscisic acid (ABA)e0
- Direction
- lesse0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root of atsuc4 mutants accumulated less sucrose and abscisic acid (ABA) and more indole-3-acetic acid (IAA) on 4% and 6% sucrose supplementation.”
t0“Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation”
Claim · model-written summary
Under sucrose supplementation, mutant roots accumulated more IAA.
- Taxon
- ArabidopsisArabidopsist0
- Material
- atsuc4 mutantse0
- Outcome
- indole-3-acetic acid (IAA)e0
- Direction
- moree0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“the root of atsuc4 mutants accumulated less sucrose and abscisic acid (ABA) and more indole-3-acetic acid (IAA) on 4% and 6% sucrose supplementation.”
t0“Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation”
Claim · model-written summary
Sugar transport, metabolism, and ABA signalling genes were down regulated in mutants versus wild type under 6% sucrose.
- Taxon
- ArabidopsisArabidopsist0
- Material
- mutant plantse0
- Outcome
- genes associated with sugar transport and metabolism, as well as ABA signallinge0
- Direction
- down-regulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“numerous genes associated with sugar transport and metabolism, as well as ABA signalling were down-regulated, whereas many IAA signaling-related genes were up-regulated in mutant plants relative to the wild type under 6% sucrose treatment.”
t0“Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation”
Claim · model-written summary
IAA signalling genes were up regulated in mutants versus wild type under 6% sucrose.
- Taxon
- ArabidopsisArabidopsist0
- Material
- mutant plantse0
- Outcome
- IAA signaling-related genese0
- Direction
- up-regulatede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“many IAA signaling-related genes were up-regulated in mutant plants relative to the wild type under 6% sucrose treatment.”
t0“Arabidopsis sucrose transporter 4 (AtSUC4) is involved in high sucrose-mediated inhibition of root elongation”
The same questions in other papers
sucrose · growth · ArabidopsisPositive and negative results
7 papers in the same direction as this paper · 9 in the opposite direction
- positive
- positive
- positive
13 papers more in this group
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