Abstract
Plants develop palisade tissue consisting of cylindrical mesophyll cells located at the adaxial side of leaves in response to high light. To understand high light signalling in palisade tissue development, we investigated leaf autonomous and long-distance signal responses of palisade tissue development using Arabidopsis thaliana. Illumination of a developing leaf with high light induced cell height elongation, whereas illumination of mature leaves with high light increased cell density and suppressed cell width expansion in palisade tissue of new leaves. Examination using phototropin1 phototropin2 showed that blue light signalling mediated by phototropins was involved in cell height elongation of the leaf autonomous response rather than the cell density increase induced by long-distance signalling. Hydrogen peroxide treatment induced cylindrical palisade tissue cell formation in both a leaf autonomous and long-distance manner, suggesting involvement of oxidative signals. Although constitutive expression of transcription factors involved in systemic-acquired acclimation to excess light, ZAT10 and ZAT12, induced cylindrical palisade tissue cell formation, knockout of these genes did not affect cylindrical palisade tissue cell formation. We conclude that two distinct signalling pathways - leaf autonomous signalling mostly dependent on blue light signalling and long-distance signalling from mature leaves that sense high light and oxidative stress - control palisade tissue development in A. thaliana.
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Claims 8
Claim · model-written summary
High light on a developing leaf induced palisade cell height elongation.
- Taxon
- Arabidopsis thaliana
Arabidopsis thalianae1 - Organ / stage
- developing leafe0
- Treatment
- Illumination of a developing leaf with high lighte0
- Outcome
- cell height elongatione0
- Direction
- elongatione0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Illumination of a developing leaf with high light induced cell height elongation”
e1“using Arabidopsis thaliana”
Claim · model-written summary
High light on mature leaves increased cell density in palisade tissue of new leaves.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Organ / stage
- new leavese0
- Treatment
- illumination of mature leaves with high lighte0
- Outcome
- cell densitye0
- Direction
- increasede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“illumination of mature leaves with high light increased cell density and suppressed cell width expansion in palisade tissue of new leaves”
e1“using Arabidopsis thaliana”
Claim · model-written summary
High light on mature leaves suppressed cell width expansion in palisade tissue of new leaves.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Organ / stage
- new leavese0
- Treatment
- illumination of mature leaves with high lighte0
- Outcome
- cell width expansione0
- Direction
- suppressede0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“illumination of mature leaves with high light increased cell density and suppressed cell width expansion in palisade tissue of new leaves”
e1“using Arabidopsis thaliana”
Claim · model-written summary
Phototropin-mediated blue light signaling was involved in local cell height elongation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Gene
- phototropinse0
- Outcome
- cell height elongatione0
- Qualifier
- leaf autonomous responsee0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“blue light signalling mediated by phototropins was involved in cell height elongation of the leaf autonomous response”
e1“using Arabidopsis thaliana”
Claim · model-written summary
Phototropin-mediated blue light signaling was not involved in the long-distance cell density increase.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae2
- Gene
- phototropinse1
- Outcome
- cell density increasee0
- Qualifier
- long-distance signallinge0
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“rather than the cell density increase induced by long-distance signalling”
e1“blue light signalling mediated by phototropins”
e2“using Arabidopsis thaliana”
Claim · model-written summary
Hydrogen peroxide treatment induced cylindrical palisade cells by both local and long-distance responses.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- Hydrogen peroxide treatmente0
- Outcome
- cylindrical palisade tissue cell formatione0
- Qualifier
- in both a leaf autonomous and long-distance mannere0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Hydrogen peroxide treatment induced cylindrical palisade tissue cell formation in both a leaf autonomous and long-distance manner”
e1“using Arabidopsis thaliana”
Claim · model-written summary
Constitutive expression of ZAT10 and ZAT12 induced cylindrical palisade tissue cells.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae1
- Treatment
- constitutive expression of transcription factorse0
- Gene
- ZAT10 and ZAT12e0
- Outcome
- cylindrical palisade tissue cell formatione0
Not reportedComparatorDirection
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“constitutive expression of transcription factors involved in systemic-acquired acclimation to excess light, ZAT10 and ZAT12, induced cylindrical palisade tissue cell formation”
e1“using Arabidopsis thaliana”
Claim · model-written summary
Knockout of ZAT10 and ZAT12 did not affect cylindrical palisade tissue cell formation.
- Taxon
- Arabidopsis thalianaArabidopsis thalianae2
- Treatment
- knockout of these genese0
- Gene
- ZAT10 and ZAT12e1
- Outcome
- cylindrical palisade tissue cell formatione0
- Direction
- did not affecte0
Not reportedComparator
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“knockout of these genes did not affect cylindrical palisade tissue cell formation”
e1“ZAT10 and ZAT12”
e2“using Arabidopsis thaliana”
The same questions in other papers
light · growth · Arabidopsis thaliana (thale cress)Results differ
29 papers in the same direction as this paper · 14 in the opposite direction
- negative
- negative
- negative
40 papers more in this group
See all 44 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.