Abstract
Root growth and architecture are markedly influenced by both developmental and environmental cues. Sugars integrate different stimuli and are essential building blocks and signaling molecules for modulating the root system. Members from the SUGAR WILL EVENTUALLY BE EXPORTED TRANSPORTER (SWEET) family facilitate the transport of different sugars over cellular membranes and steer both inter and intracellular distribution of sugars. SWEET17 represents a fructose-specific sugar porter localized to the vacuolar membrane, the tonoplast. Here, we analyzed how SWEET17-dependent fructose released from vacuoles affects root growth during drought stress in Arabidopsis (Arabidopsis thaliana). We found that the SWEET17 gene was predominantly expressed in the root vasculature and in meristematic cells of the root tip. SWEET17 expression appeared markedly induced during lateral root (LR) outgrowth and under drought. Moreover, fructose repressed primary root growth but induced density and length of first order LRs. Consistently, sweet17 knock-out mutants exhibited reduced LR growth and a diminished expression of LR-development-related transcription factors during drought stress, resulting in impaired drought tolerance of sweet17 mutants. We discuss how SWEET17 activity integrates drought-induced cellular responses into fructose signaling necessary for modulation of the root system and maximal drought tolerance.
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Claims 7
Claim · model-written summary
SWEET17 expression predominated in root vasculature and meristematic root tip cells.
- Taxon
- Arabidopsis
Arabidopsise1 - Organ / stage
- root vasculature and in meristematic cells of the root tipe0
- Gene
- SWEET17e0
- Outcome
- predominantly expressede0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SWEET17 gene was predominantly expressed in the root vasculature and in meristematic cells of the root tip”
t0“Vacuolar fructose transporter SWEET17 is critical for root development and drought tolerance”
e1“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
SWEET17 expression increased during lateral root outgrowth and drought.
- Taxon
- ArabidopsisArabidopsise1
- Gene
- SWEET17e0
- Outcome
- SWEET17 expressione0
- Direction
- inducede0
- Qualifier
- during lateral root (LR) outgrowth and under droughte0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“SWEET17 expression appeared markedly induced during lateral root (LR) outgrowth and under drought”
t0“Vacuolar fructose transporter SWEET17 is critical for root development and drought tolerance”
e1“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
Fructose repressed primary root growth.
- Taxon
- ArabidopsisArabidopsise1
- Treatment
- fructosee0
- Outcome
- primary root growthe0
- Direction
- repressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fructose repressed primary root growth but induced density and length of first order LRs”
t0“Vacuolar fructose transporter SWEET17 is critical for root development and drought tolerance”
e1“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
Fructose increased first order lateral root density and length.
- Taxon
- ArabidopsisArabidopsise1
- Treatment
- fructosee0
- Outcome
- density and length of first order LRse0
- Direction
- inducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“fructose repressed primary root growth but induced density and length of first order LRs”
t0“Vacuolar fructose transporter SWEET17 is critical for root development and drought tolerance”
e1“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
sweet17 knockout mutants had reduced lateral root growth during drought.
- Taxon
- ArabidopsisArabidopsise1
- Material
- sweet17 knock-out mutantse0
- Treatment
- drought stresse0
- Outcome
- LR growthe0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweet17 knock-out mutants exhibited reduced LR growth and a diminished expression of LR-development-related transcription factors during drought stress”
t0“Vacuolar fructose transporter SWEET17 is critical for root development and drought tolerance”
e1“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
sweet17 knockout mutants had diminished expression of lateral root development transcription factors during drought.
- Taxon
- ArabidopsisArabidopsise1
- Material
- sweet17 knock-out mutantse0
- Treatment
- drought stresse0
- Outcome
- expression of LR-development-related transcription factorse0
- Direction
- diminishede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“sweet17 knock-out mutants exhibited reduced LR growth and a diminished expression of LR-development-related transcription factors during drought stress”
t0“Vacuolar fructose transporter SWEET17 is critical for root development and drought tolerance”
e1“Arabidopsis (Arabidopsis thaliana)”
Claim · model-written summary
sweet17 mutants had impaired drought tolerance.
- Taxon
- ArabidopsisArabidopsise1
- Material
- sweet17 mutantse0
- Outcome
- impaired drought tolerancee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“impaired drought tolerance of sweet17 mutants”
t0“Vacuolar fructose transporter SWEET17 is critical for root development and drought tolerance”
e1“Arabidopsis (Arabidopsis thaliana)”
The same questions in other papers
fructose · growth · ArabidopsisResults agree
1 paper in the same direction as this paper
- no effect
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.