Faculty Opinions recommendation of Restoration of DWF4 expression to the leaf margin of a dwf4 mutant is sufficient to restore leaf shape but not size: the role of the margin in leaf development.

2007 ◽  
Author(s):  
Lieven De Veylder
Keyword(s):  
Leaf Development ◽  
Leaf Shape ◽  
Leaf Margin

scholarly journals Restoration ofDWF4expression to the leaf margin of adwf4mutant is sufficient to restore leaf shape but not size: the role of the margin in leaf development

2007 ◽  
Vol 52 (6) ◽  
pp. 1094-1104 ◽  
Author(s):  
Beate Reinhardt ◽  
Emanuel Hänggi ◽  
Sabrine Müller ◽  
Marion Bauch ◽  
Joanna Wyrzykowska ◽  
...  
Keyword(s):  
Leaf Development ◽  
Leaf Shape ◽  
Leaf Margin

Developmental comparison of leaf shape variation in three Chamaedorea species

Botany ◽  
2009 ◽  
Vol 87 (2) ◽  
pp. 210-221 ◽  
Author(s):  
Julia Nowak ◽  
Adam Nowak ◽  
Usher Posluszny
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Light Microscopy ◽  
Leaf Development ◽  
Leaf Shape ◽  
Shape Variation ◽  
Differential Growth ◽  
Scanning Electron ◽  
Palm Leaf ◽  
The Ideal

Compound palm leaf development is unique and consists of two processes. First, the primordial tissue folds through differential growth, forming plications. Second, these plications separate through an abscission-like process, forming leaflets. The second process of leaflet separation allows for the development of compound leaves. The question that this study addresses concerns the development of bifid leaves, as they do not form leaflets but only develop a cleft through an apical incision. The ideal genus to use for this study is Chamaedorea as it includes species with both pinnate and bifid leaves. Chamaedorea fragrans (Ruiz & Pav.) Mart. and Chamaedorea stolonifera H. Wendl. ex Hook. f. were chosen as the species with adult bifid leaves. Although Chamaedorea seifrizii Burret is a pinnate-leaved palm, its juvenile leaves are bifid. Scanning electron microscopy and light microscopy were used to study the development of bifid leaves. Our results indicate that neither of these bifid palms develop separation sites within the lamina, but rather the apical cleft develops through “late leaflet separation” or by an abscission-like process. In contrast, C. seifrizii juvenile leaves exhibit “early leaflet separation” when developing the apical cleft.

scholarly journals Combining Leaf Shape and Texture for Costa Rican Plant Species

2016 ◽  
Author(s):  
Jose Carranza-Rojas ◽  
Erick Mata-Montero
Keyword(s):  
Costa Rica ◽  
Tree Species ◽  
Leaf Shape ◽  
Costa Rican ◽  
Automatic Identification ◽  
Leaf Margin ◽  
Best Value ◽  
Candidate Species ◽  
Image Dataset ◽  
Northeast Us

In the last decade, research in Computer Vision has developed several algorithms to help botanists and non-experts to classify plants based on images of their leaves. LeafSnap is a mobile application that uses a multiscale curvature model of the leaf margin to classify leaf images into species. It has achieved high levels of accuracy on 184 tree species from Northeast US. We extend the research that led to the development of LeafSnap along two lines. First, LeafSnap’s underlying algorithms are applied to a set of 66 tree species from Costa Rica. Then, texture is used as an additional criterion to measure the level of improvement achieved in the automatic identification of Costa Rica tree species. A 25.6% improvement was achieved for a Costa Rican clean image dataset and 42.5% for a Costa Rican noisy image dataset. In both cases, our results show this increment as statistically significant. Further statistical analysis of visual noise impact, best algorithm combinations per species, and best value of k , the minimal cardinality of the set of candidate species that the tested algorithms render as best matches is also presented in this research.

Aubrieta alshehbazii (Brassicaceae), a new species from Central Turkey

Phytotaxa ◽  
2017 ◽  
Vol 299 (1) ◽  
pp. 103 ◽  
Author(s):  
ALİ A. DÖNMEZ ◽  
ZÜBEYDE UĞURLU AYDIN ◽  
MARCUS A. KOCH
Keyword(s):  
New Species ◽  
Leaf Shape ◽  
Type Material ◽  
Morphological Description ◽  
Leaf Margin ◽  
New Synonym ◽  
Central Turkey ◽  
A New Species

Aubrieta alshehbazii is described as a new species that was collected from rocky steppe of Central Turkey. The new species is sympatric and most similar to A. pinardii, but differs by leaf shape, leaf margin, petiole, indumentum and inflorescence. A detailed morphological description, figures and comparisons with potentially closely allied species are provided herein. The new species is assigned to CR threat category of the IUCN. Beside this, due to further studies on type material of various Aubrieta taxa, A. anamasica is proposed as a new synonym of A. pinardii

scholarly journals Why More Leaflets? The Role of Natural Selection in Shaping the Spatial Pattern of Leaf-Shape Variation in Oxytropis diversifolia (Fabaceae) and Two Close Relatives

2021 ◽  
Vol 12 ◽  
Author(s):  
Hui Wang ◽  
Pei-Liang Liu ◽  
Jian Li ◽  
Han Yang ◽  
Qin Li ◽  
...  
Keyword(s):  
Natural Selection ◽  
Spatial Pattern ◽  
Leaf Shape ◽  
Morphological Differentiation ◽  
Clinal Variation ◽  
Shape Variation ◽  
Association Analyses ◽  
Intergenic Regions ◽  
Close Relatives

Leaf shape exhibits tremendous diversity in angiosperms. It has long been argued that leaf shape can affect major physiological and ecological properties of plants and thus is likely to be adaptive, but the evolutionary evidence is still scarce. Oxytropis diversifolia (Fabaceae) is polymorphic for leaf shape (1 leaflet, 1–3 leaflets, and 3 leaflets) and exhibits clinal variation in steppes of Nei Mongol, China. With two close relatives predominantly fixed for one phenotype as comparison (Oxytropis neimonggolica with 1 leaflet and Oxytropis leptophylla with 5–13 leaflets), we used a comprehensive cline-fitting approach to assess the role of natural selection in shaping the spatial pattern of leaf-shape variation in this system. For 551 individuals sampled from 22 populations, we quantified leaf-morphological differentiation, evaluated patterns of neutral genetic variation using five chloroplast DNA intergenic regions and 11 nuclear microsatellite loci, and performed microhabitat and macroclimatic-association analyses. We found that 1-leaflet proportions in O. diversifolia populations significantly increased from west to east, and three phenotypes also differed in leaflet-blade size. However, compared with the other two species, populations of O. diversifolia showed little neutral genetic differentiation, and no population structure was detected at either marker. We further revealed that the leaf-shape cline could largely be explained by three macroclimatic variables, with leaflet number decreasing and leaflet-blade size increasing with annual precipitation and showing the reverse trends with temperature seasonality and isothermality. Our results suggest that spatially varying abiotic environmental factors contribute to shape the leaf-shape cline in O. diversifolia, while the interspecific pattern may be due to both local adaptation and historical events.

scholarly journals Distinctness, Uniformity and Stability (DUS) Characterization of Neolamarckia Cadamba Genetic Resources

2019 ◽  
Vol 7 (2) ◽  
pp. 268-275
Author(s):  
R. Thirunirai Selvan ◽  
K. T. Parthiban ◽  
B. Palanikumaran
Keyword(s):  
Genetic Resources ◽  
Leaf Shape ◽  
Morphological Characters ◽  
Leaf Length ◽  
Leaf Margin ◽  
Leaf Venation ◽  
Leaf Petiole ◽  
New Varieties ◽  
Bark Texture

Neolamarckia cadamba (Kadam) genetic resources were characterised Distinctness, Uniformity and Stability (DUS) traits based on International Union for the Protection of New Varieties of Plants12 guidelines. Twenty-five clones of kadam were characterised based on the morphological characters of leaf and bark with 12 descriptors. Among these 12 descriptors, 9 were qualitative traits viz., leaf shape, Leaf base shape, apex shape, leaf margin, leaf venation, base symmetry, Waxiness in upper side of leaf, bark colour and bark texture and 3 were quantitative characters viz., leaf length, leaf breath, leaf petiole length. The study exhibited significant variations among the genetic resources investigated for various DUS traits, which could act as reference traits for developing variety to protect the genetic resources through Intellectual Property Rights.

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