The Regulation of Dorsiventral Symmetry in Plants

Gleissberg, Stefan; Kim, Min Soo; Jernstedt, Judith A.; Sinha, Neelima

doi:10.1007/978-4-431-65930-3_15

Cited by 5 publications

(10 citation statements)

References 38 publications

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“…Fusion of lateral margins across an adaxial cross zone is suggestive of abaxialization of the unifacial petiole (Gleissberg et al 1999). Orientation of the xylem poles within the ring of vascular bundles to the center of the petiole would also be in accordance with abaxialization of its surface.…”

Section: Resultsmentioning

confidence: 93%

“…Reduction of abaxial identity in phb leaves was confirmed using the abaxial identity marker FIL, a YABBY gene (Siegfried et al 1999). Interestingly, while peltate leaves with abaxialized parts have evolved repeatedly in angiosperms, including the case reported here, adaxialized leaves like those seen in phb plants appear to be extremely rare in nature (Gleissberg et al 1999). The similarity between mutants and peltate/unifacial leaves in other plants suggests that expression changes in these genes underlie evolution of peltate/unifacial leaf architectures (Kim et al 2003a).…”

Section: Introductionmentioning

confidence: 84%

“…Here, the lamina-forming leaf blade has a bifacial structure, while the petiole is unifacial. Along unifacial petioles, the adaxial leaf face is generally thought to be suppressed, with the surface being made up solely of the abaxial face (Gleissberg et al 1999). Typically, such unifacial petioles are radially symmetric in outline, develop a circular arrangement of vascular bundles, and the leaf margin is completely suppressed.…”

Section: Introductionmentioning

confidence: 99%

“…Marginal fusion gives rise to a so-called cross zone bridging the lateral margins across the adaxial side of the leaf. Typically, cross zones develop wherever bifacial and abaxialized leaf sectors meet along the leaf (Gleissberg et al 1999).…”

Section: Introductionmentioning

confidence: 99%

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Developmental events leading to peltate leaf structure in Tropaeolum majus (Tropaeolaceae) are associated with expression domain changes of a YABBY gene

et al. 2005

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Peltate leaf architecture has evolved from conventional bifacial leaves many times in flowering plant evolution. Characteristics of peltate leaves, such as the differentiation of a cross zone and of a radially symmetric, margin-less petiole, have also been observed in mutants of genes responsible for adaxial-abaxial polarity establishment. This suggests that altered regulation of such genes provided a mechanism for the evolution of peltate leaf structure. Here, we show that evolution of leaf peltation in Tropaeolum majus, a species distantly related to Arabidopsis thaliana, was associated with altered expression of Tropaeolum majus FILAMENTOUS FLOWER (TmFIL), a gene conferring abaxial identity. In situ hybridization indicates that adaxial and abaxial domains are established in early leaf primordia as in species with bifacial leaves. Upon initiation of the cross zone by fusion of the blade margins, localized expansion of TmFIL to the upper leaf side could be seen, indicating a local loss of adaxial leaf identity. The observed changes in expression are consistent with a role of TmFIL in radialization of the petiole and circularization of the leaf blade margin by the cross zone. In addition, expression was observed in segment primordia and during expansion of the bifacial blade, suggesting additional roles for TmFIL in leaf development.

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Section: Resultsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Developmental events leading to peltate leaf structure in Tropaeolum majus (Tropaeolaceae) are associated with expression domain changes of a YABBY gene

et al. 2005

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“…Unifacial leaves, on the other hand, have only the abaxial identity in their leaf blade at the molecular level (Gleissberg et al, 1999;Rudall & Buzgo, 2002;Yamaguchi et al, 2010Yamaguchi et al, , 2012. As a result, the shape of their leaf blade is usually cylindrical (terete), similar to the shape of the phantastica (phan) mutant of snapdragon (Antirrhinum majus), which lacks the adaxial identity (Waites & Hudson, 1995).…”

Section: Introductionmentioning

confidence: 99%

Morphogenesis of flattened unifacial leaves in Juncus prismatocarpus (Juncaceae)

Yin

Tsukaya

2019

New Phytologist

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Summary 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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Developmental Genetics and Morphological Evolution of Flowering Plants, Especially Bladderworts (Utricularia): Fuzzy Arberian Morphology Complements Classical Morphology, , , , , , , , , <lk refid="m4.10"

2001

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This review compares new developmental models on flowering and other vascular plants with evolutionary hypotheses formulated by Agnes Arber and like-minded botanists. Special emphasis is laid on philosophical basics such as perspectivism, pluralism about evolutionary modelling, continuum way of thinking, and fuzzy logic. Arber's perspective is best labelled as F uzzy A rberian M orphology (FAM Approach). Its proponents ('FAMmers') treat structural categories (e.g. 'roots', 'shoots', 'stems', 'leaves', 'stipules') in vascular plants as concepts with fuzzy borderlines allowing intermediates (including transitional forms, developmental mosaics). The FAM Approach complements Cla ssical Plant M orphology (ClaM Approach), which is the traditional approach in botany. ClaM proponents ('ClaMmers') postulate that the structural categories of vascular plants are regarded as concepts with clear-cut borderlines and without intermediates. However, during the evolution of vascular plants, the root-shoot distinction and the stem-leaf distinction have become blurred several times due to developmental changes, resulting in organs with unique combinations of features. This happened, for example, in the bladderworts (Utricularia, Lentibulariaceae). When focusing on the 'leaf', the FAM Approach is identical to Arber's 'partial-shoot theory of the leaf' and Sinha's 'leaf shoot continuum model'. A compound leaf can repeat the developmental pathway of the whole shoot, at least to some degree. For example, compound leaves of Chisocheton(Meliaceae) with indeterminate apical growth and three-dimensional branching may be seen as developmental mosaics sharing some growth processes with whole shoots! We focus here on the FAM Approach because this perspective is especially promising for developmental geneticists studying flowering and other vascular plants.

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The Regulation of Dorsiventral Symmetry in Plants

Cited by 5 publications

References 38 publications

Developmental events leading to peltate leaf structure in Tropaeolum majus (Tropaeolaceae) are associated with expression domain changes of a YABBY gene

Developmental events leading to peltate leaf structure in Tropaeolum majus (Tropaeolaceae) are associated with expression domain changes of a YABBY gene

Morphogenesis of flattened unifacial leaves in Juncus prismatocarpus (Juncaceae)

Developmental Genetics and Morphological Evolution of Flowering Plants, Especially Bladderworts (Utricularia): Fuzzy Arberian Morphology Complements Classical Morphology, , , , , , , , , <lk refid="m4.10"

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