Abstract
To reveal the mode of morphogenesis of flattened unifacial leaves, we analysed the cell division direction and distribution on the leaf blade of Juncus prismatocarpus. Using the pulse-chase 5-ethynyl-2'-deoxyuridine method, we quantified and mapped the cell division direction on the leaf blade of J. prismatocarpus and compared the distribution of thickening cell divisions with the expression pattern of DROOPING LEAF (DL), a key gene involved in leaf blade thickening. Thickening cell divisions were the most abundant (> 45%) among all cell division directions on the leaf blade of J. prismatocarpus from the early plastochron 2 stage through the plastochron 3 stage. Mapping of cell divisions indicated that cell divisions in a particular direction were not restricted to a particular domain but were distributed diffusely throughout the entire cross-sectional area of the leaf blade. Gradient analysis indicated that the distribution of thickening cell divisions of the adaxial domain was denser than that of the abaxial domain. Contrary to the prolonged and diffuse distribution of thickening cell divisions, DL expression was transient and restricted in a narrow band. Our results suggest that a diffuse 'thickening meristem' plays the key role in the development of flattened unifacial leaves.
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Claims 5
Claim · model-written summary
Thickening cell divisions were the most abundant (> 45%) among all cell division directions on the leaf blade of J. prismatocarpus from early plastochron 2 through plastochron 3.
- Taxon
- J. prismatocarpus
.jpg?width=60)
Juncus prismatocarpuse1 - Organ / stage
- leaf bladee1
- Outcome
- Thickening cell divisionse1
- Value
- > 45%e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
.jpg?width=500)
Verbatim
e1“Thickening cell divisions were the most abundant (> 45%) among all cell division directions on the leaf blade of J. prismatocarpus from the early plastochron 2 stage through the plastochron 3 stage”
Claim · model-written summary
Cell divisions in a particular direction were not restricted to a particular domain but were distributed diffusely throughout the entire cross-sectional area of the leaf blade.
- Taxon
- Juncus prismatocarpusJuncus prismatocarpust0
- Organ / stage
- leaf bladee1
- Outcome
- cell divisions in a particular direction were not restricted to a particular domaine1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Juncus prismatocarpus”
e1“cell divisions in a particular direction were not restricted to a particular domain but were distributed diffusely throughout the entire cross-sectional area of the leaf blade”
Claim · model-written summary
The distribution of thickening cell divisions was denser in the adaxial domain than in the abaxial domain of the leaf blade.
- Taxon
- Juncus prismatocarpusJuncus prismatocarpust0
- Outcome
- distribution of thickening cell divisions of the adaxial domaine1
- Direction
- densere1
- Comparator
- abaxial domaine1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Juncus prismatocarpus”
e1“the distribution of thickening cell divisions of the adaxial domain was denser than that of the abaxial domain”
Claim · model-written summary
DL expression was transient and restricted in a narrow band, in contrast to the prolonged and diffuse distribution of thickening cell divisions.
- Taxon
- Juncus prismatocarpusJuncus prismatocarpust0
- Gene
- DLe1
- Outcome
- DL expression was transient and restricted in a narrow bande1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Juncus prismatocarpus”
e1“DL expression was transient and restricted in a narrow band”
Claim · model-written summary
The authors suggest that a diffuse thickening meristem plays the key role in the development of flattened unifacial leaves.
- Taxon
- Juncus prismatocarpusJuncus prismatocarpust0
- Outcome
- development of flattened unifacial leavese1
- Qualifier
- diffuse 'thickening meristem'e1
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
t0“Juncus prismatocarpus”
e1“a diffuse 'thickening meristem' plays the key role in the development of flattened unifacial leaves”