Abstract
The phytohormone salicylic acid (SA) is well known for its induction of pathogenesis-related proteins and systemic acquired resistance; SA also has specific effects on plant growth and development. Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development. We show that exogenous SA treatment at low (below 50 µM) and high (greater than 50 µM) concentrations affect root meristem development in two different PR1-independent ways. Low-concentration SA promoted adventitious roots and altered architecture of the root apical meristem, whereas high-concentration SA inhibited all growth processes in the root. All exposures to exogenous SA led to changes in auxin synthesis and transport. A wide range of SA treatment concentrations activated auxin synthesis, but the effect of SA on auxin transport was dose dependent. Mathematical modeling of auxin synthesis and transport predicted auxin accumulation or depletion in the root tip following low- or high-concentration SA treatments, respectively. SA-induced auxin accumulation led to the formation of more layers of columella initials, an additional cortical cell layer (middle cortex), and extra files of epidermis, cortex, and endodermis cells. Suppression of SHORT ROOT and activation of CYCLIN D6;1 mediated the changes in radial architecture of the root. We propose that low-concentration SA plays an important role in shaping root meristem structure and root system architecture.
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Claims 13
Claim · model-written summary
Low-concentration SA promoted adventitious roots in Arabidopsis.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae0 - Treatment
- Low-concentration SAe1
- Outcome
- adventitious rootse1
- Direction
- promotede1
- Qualifier
- below 50 µMe2
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e1“Low-concentration SA promoted adventitious roots and altered architecture of the root apical meristem”
e2“exogenous SA treatment at low (below 50 µM) and high (greater than 50 µM) concentrations”
Claim · model-written summary
Low-concentration SA altered the architecture of the root apical meristem in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Organ / stage
- root apical meristeme1
- Treatment
- Low-concentration SAe1
- Outcome
- architecture of the root apical meristeme1
- Direction
- alterede1
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e1“Low-concentration SA promoted adventitious roots and altered architecture of the root apical meristem”
Claim · model-written summary
High-concentration SA inhibited all growth processes in the root of Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- high-concentration SAe3
- Outcome
- all growth processes in the roote3
- Direction
- inhibitede3
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e3“high-concentration SA inhibited all growth processes in the root”
Claim · model-written summary
All exposures to exogenous SA changed auxin synthesis and transport.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- exogenous SAe5
- Outcome
- auxin synthesis and transporte5
- Direction
- changese5
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e5“All exposures to exogenous SA led to changes in auxin synthesis and transport”
Claim · model-written summary
A wide range of SA concentrations activated auxin synthesis in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- A wide range of SA treatment concentrationse4
- Outcome
- auxin synthesise4
- Direction
- activatede4
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e4“A wide range of SA treatment concentrations activated auxin synthesis, but the effect of SA on auxin transport was dose dependent”
Claim · model-written summary
The effect of SA on auxin transport was dose dependent.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- SAe4
- Outcome
- auxin transporte4
Not reportedDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e4“A wide range of SA treatment concentrations activated auxin synthesis, but the effect of SA on auxin transport was dose dependent”
Claim · model-written summary
Mathematical modeling predicted auxin accumulation in the root tip after low-concentration SA treatment.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- low- or high-concentration SA treatmentse6
- Outcome
- auxin accumulatione6
- Direction
- increaseinferrede6
- Qualifier
- in the root tipe6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e6“Mathematical modeling of auxin synthesis and transport predicted auxin accumulation or depletion in the root tip following low- or high-concentration SA treatments, respectively”
Claim · model-written summary
Mathematical modeling predicted auxin depletion in the root tip after high-concentration SA treatment.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- low- or high-concentration SA treatmentse6
- Outcome
- depletione6
- Direction
- decreaseinferrede6
- Qualifier
- in the root tipe6
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e6“Mathematical modeling of auxin synthesis and transport predicted auxin accumulation or depletion in the root tip following low- or high-concentration SA treatments, respectively”
Claim · model-written summary
SA-induced auxin accumulation led to more layers of columella initials in Arabidopsis root tips.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- SA-induced auxin accumulatione7
- Outcome
- layers of columella initialse7
- Direction
- moree7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e7“SA-induced auxin accumulation led to the formation of more layers of columella initials, an additional cortical cell layer (middle cortex), and extra files of epidermis, cortex, and endodermis cells”
Claim · model-written summary
SA-induced auxin accumulation led to an additional cortical cell layer (middle cortex) in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- SA-induced auxin accumulatione7
- Outcome
- an additional cortical cell layer (middle cortex)e7
- Direction
- increaseinferrede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e7“SA-induced auxin accumulation led to the formation of more layers of columella initials, an additional cortical cell layer (middle cortex), and extra files of epidermis, cortex, and endodermis cells”
Claim · model-written summary
SA-induced auxin accumulation led to extra files of epidermis, cortex, and endodermis cells in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Treatment
- SA-induced auxin accumulatione7
- Outcome
- extra files of epidermis, cortex, and endodermis cellse7
- Direction
- increaseinferrede7
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e7“SA-induced auxin accumulation led to the formation of more layers of columella initials, an additional cortical cell layer (middle cortex), and extra files of epidermis, cortex, and endodermis cells”
Claim · model-written summary
Suppression of SHORT ROOT mediated the changes in radial architecture of the root in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Gene
- SHORT ROOTe1
- Outcome
- radial architecture of the roote1
- Qualifier
- Suppressione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e1“Suppression of SHORT ROOT and activation of CYCLIN D6;1 mediated the changes in radial architecture of the root”
Claim · model-written summary
Activation of CYCLIN D6;1 mediated the changes in radial architecture of the root in Arabidopsis.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae0
- Gene
- CYCLIN D6;1e1
- Outcome
- radial architecture of the roote1
- Qualifier
- activatione1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Here we analyzed the effect of SA on Arabidopsis (Arabidopsis thaliana) root development”
e1“Suppression of SHORT ROOT and activation of CYCLIN D6;1 mediated the changes in radial architecture of the root”
The same questions in other papers
salicylic acid · growth · Arabidopsis thaliana (thale cress)Results differ
3 papers in the same direction as this paper · 3 in the opposite direction
- negative
- negative
- negative
3 papers more in this group
See all 7 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.