Abstract
• The hormonal and physiological regulations underpinning the cell contexts of structural features of the heterogeneous cell wall pectic polysaccharide rhamnogalacturonan-I are far from being understood. • The effect of the modulation of abscisic acid (ABA) concentrations and sensitivity on the detection of the LM6 1,5-arabinan epitope at the surface of Arabidopsis thaliana seedling root apices was assessed by means of fluorescence imaging. • Treatment with 50 nM ABA resulted in an increase in the detection of the LM6 epitope at the root surface in the region of the meristem. An inhibitor of ABA biosynthesis and introduction of the ABA synthesis mutation aba3-2 resulted in reduced epitope detection. The same ABA application resulted in an increase in the number of epidermal root meristem cells and both this and LM6 epitope detection were specifically disrupted in the abi4 ABA-insensitive mutant. These two effects were uncoupled with the application of higher ABA concentrations, which resulted in a reduction in the number of epidermal root meristem cells but increased LM6 epitope detection. • This work demonstrates a role for ABI4-mediated ABA signalling in the modulation of pectic arabinan occurrence at the A. thaliana root meristem.
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Claims 9
Claim · model-written summary
50 nM ABA increased detection of the LM6 epitope at the root meristem surface.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianat0 - Organ / stage
- root surface in the region of the meristeme0
- Treatment
- 50 nM ABAe0
- Outcome
- detection of the LM6 epitopee0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Treatment with 50 nM ABA resulted in an increase in the detection of the LM6 epitope at the root surface in the region of the meristem”
t0“Arabidopsis thaliana”
Claim · model-written summary
An ABA biosynthesis inhibitor reduced epitope detection.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- An inhibitor of ABA biosynthesise0
- Outcome
- epitope detectione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An inhibitor of ABA biosynthesis and introduction of the ABA synthesis mutation aba3-2 resulted in reduced epitope detection”
t0“Arabidopsis thaliana”
Claim · model-written summary
The aba3-2 mutation reduced epitope detection.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- introduction of the ABA synthesis mutation aba3-2e0
- Gene
- aba3-2e0
- Outcome
- epitope detectione0
- Direction
- reducede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“An inhibitor of ABA biosynthesis and introduction of the ABA synthesis mutation aba3-2 resulted in reduced epitope detection”
t0“Arabidopsis thaliana”
Claim · model-written summary
ABA increased the number of epidermal root meristem cells.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- ABA applicatione0
- Outcome
- number of epidermal root meristem cellse0
- Direction
- increasee0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“The same ABA application resulted in an increase in the number of epidermal root meristem cells”
t0“Arabidopsis thaliana”
Claim · model-written summary
The abi4 mutant disrupted ABA-induced root meristem cell increase.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- abi4 ABA-insensitive mutante0
- Gene
- abi4e0
- Outcome
- number of epidermal root meristem cellse1
- Direction
- disruptede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both this and LM6 epitope detection were specifically disrupted in the abi4 ABA-insensitive mutant”
e1“The same ABA application resulted in an increase in the number of epidermal root meristem cells”
t0“Arabidopsis thaliana”
Claim · model-written summary
The abi4 mutant disrupted LM6 epitope detection.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- abi4 ABA-insensitive mutante0
- Gene
- abi4e0
- Outcome
- LM6 epitope detectione0
- Direction
- disruptede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“both this and LM6 epitope detection were specifically disrupted in the abi4 ABA-insensitive mutant”
t0“Arabidopsis thaliana”
Claim · model-written summary
Higher ABA concentrations reduced epidermal root meristem cell number.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- higher ABA concentrationse0
- Outcome
- number of epidermal root meristem cellse0
- Direction
- reductione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher ABA concentrations, which resulted in a reduction in the number of epidermal root meristem cells but increased LM6 epitope detection”
t0“Arabidopsis thaliana”
Claim · model-written summary
Higher ABA concentrations increased LM6 epitope detection.
- Taxon
- Arabidopsis thalianaArabidopsis thalianat0
- Treatment
- higher ABA concentrationse0
- Outcome
- LM6 epitope detectione0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“higher ABA concentrations, which resulted in a reduction in the number of epidermal root meristem cells but increased LM6 epitope detection”
t0“Arabidopsis thaliana”
Claim · model-written summary
ABI4-mediated ABA signalling modulates pectic arabinan occurrence at the root meristem.
- Taxon
- A. thalianaArabidopsis thalianae0
- Organ / stage
- root meristeme0
- Gene
- ABI4e0
- Outcome
- pectic arabinan occurrencee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“ABI4-mediated ABA signalling in the modulation of pectic arabinan occurrence at the A. thaliana root meristem”
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