Abstract
Plant hormone brassinosteroids (BRs) and auxin exert some similar physiological effects likely through their functional interaction, but the mechanism for this interaction is unknown. In this study, we show that BRs are required for lateral root development in Arabidopsis and that BRs act synergistically with auxin to promte lateral root formation. BR perception is required for the transgenic expression of the beta-glucuronidase gene fused to a synthetic auxin-inducible promoter (DR5::GUS) in root tips, while exogenous BR promotes DR5::GUS expression in the root tips and the stele region proximal to the root tip. BR induction of both lateral root formation and DR5::GUS expression is suppressed by the auxin transport inhibitor N-(1-naphthyl) phthalamic acid. Importantly, BRs promote acropetal auxin transport (from the base to the tip) in the root. Our observations indicate that BRs regulate auxin transport, providing a novel mechanism for hormonal interactions in plants and supporting the hypothesis that BRs promote lateral root development by increasing acropetal auxin transport.
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Claims 7
Claim · model-written summary
BRs are required for lateral root development.
- Taxon
- Arabidopsis
Arabidopsise0 - Treatment
- BRse0
- Outcome
- lateral root developmente0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BRs are required for lateral root development in Arabidopsis”
Claim · model-written summary
BRs and auxin synergistically promote lateral root formation.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- BRse0
- Compound
- auxine0
- Outcome
- lateral root formatione0
- Direction
- promtee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BRs act synergistically with auxin to promte lateral root formation.”
t0“Arabidopsis”
Claim · model-written summary
BR perception is required for DR5::GUS expression in root tips.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- root tipse0
- Gene
- DR5::GUSe0
- Outcome
- transgenic expression of the beta-glucuronidase genee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BR perception is required for the transgenic expression of the beta-glucuronidase gene fused to a synthetic auxin-inducible promoter (DR5::GUS) in root tips”
t0“Arabidopsis”
Claim · model-written summary
Exogenous BR promotes DR5::GUS expression in root tips and proximal stele.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- root tips and the stele region proximal to the root tipe0
- Treatment
- exogenous BRe0
- Gene
- DR5::GUSe0
- Outcome
- DR5::GUS expressione0
- Direction
- promotese0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“exogenous BR promotes DR5::GUS expression in the root tips and the stele region proximal to the root tip.”
t0“Arabidopsis”
Claim · model-written summary
The auxin transport inhibitor suppresses BR-induced lateral root formation.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- auxin transport inhibitor N-(1-naphthyl) phthalamic acide0
- Outcome
- lateral root formatione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BR induction of both lateral root formation and DR5::GUS expression is suppressed by the auxin transport inhibitor N-(1-naphthyl) phthalamic acid.”
t0“Arabidopsis”
Claim · model-written summary
The auxin transport inhibitor suppresses BR-induced DR5::GUS expression.
- Taxon
- ArabidopsisArabidopsist0
- Treatment
- auxin transport inhibitor N-(1-naphthyl) phthalamic acide0
- Gene
- DR5::GUSe0
- Outcome
- DR5::GUS expressione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BR induction of both lateral root formation and DR5::GUS expression is suppressed by the auxin transport inhibitor N-(1-naphthyl) phthalamic acid.”
t0“Arabidopsis”
Claim · model-written summary
BRs promote acropetal auxin transport in roots.
- Taxon
- ArabidopsisArabidopsist0
- Organ / stage
- roote0
- Treatment
- BRse0
- Outcome
- acropetal auxin transporte0
- Direction
- promotee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“BRs promote acropetal auxin transport (from the base to the tip) in the root.”
t0“Arabidopsis”
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See all 75 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.