TY - JOUR T1 - Comparative pollen morphology and ultrastructure of Mentheae subtribe Nepetinae (Lamiaceae) JF - Rev Palaeobot Palyno Y1 - 2008 DO - 10.1016/j.revpalbo.2007.12.001 A1 - Hye-Kyoung Moon A1 - Stefan Vinckier A1 - Erik Smets A1 - Suzy Huysmans SP - 174–186 KW - Angiosperms KW - Grains KW - Labiatae KW - Nepetinae KW - Nepetoideae KW - Orbicules KW - Palynology KW - Salvia Lamiaceae KW - Sequence Data KW - Sexine Ornamentation KW - Systematic Implications KW - Tapetum KW - Ultrastructure AB - {This study provides new pollen data of 52 representative species belonging to all 12 genera in the currently classification of the subtribe Nepetinae, and considers the possible presence of orbicules for the first time. Pollen morphology and ultrastructure were investigated with light, scanning electron and transmission electron microscopy. Nepetinae pollen is small to large (P= 16-65 mu m VL - 149 UR - http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6V6W-4RC2NRJ-2&_user=2139813&_rdoc=1&_fmt=&_orig=search&_sort=d&_docanchor=&view=c&_acct=C000054276&_version=1&_urlVersion=0&_userid=2139813&md5=176fca009343bce3d0330d25969d0f75 ER - TY - JOUR T1 - Phylogeny of tribe Mentheae (Lamiaceae): The story of molecules and micromorphological characters JF - Taxon Y1 - 2010 A1 - Hye-Kyoung Moon A1 - Erik Smets A1 - Suzy Huysmans SP - 1065–1076 KW - Anatomy KW - Dna KW - Evolution KW - Inference KW - Labiatae KW - Lamiaceae KW - Mentheae KW - Micromorphology KW - Morphology KW - Nepetoideae Lamiaceae KW - Phylogeny KW - Salvia Lamiaceae KW - Sequence Data KW - Verbenaceae AB - Mentheae are the largest tribe in the family Lamiaceae and economically important, including herbs like mint, sage and thyme. The evolutionary history of this tribe was reconstructed based on ITS and trnL-trnF spacer sequence data of 71 species, representing. 47 out of 65 genera. The resulting phylogeny was used to analyse the distribution of selected morphological characteristics such as sexine ornamentation of pollen, nutlet shape with existence of abscission scar and its form, and trichome types. Two monophyletic groups are recognized, which largely correspond to the current subtribal circumscription. Subtribe Salviinae is monophyletic, including the genus Melissa which was a genus of uncertain affinity in Mentheae. Subtribe Menthinae is not monophyletic since Cleonia, Horminum, Hyssopus, Lycopus and Prunella are more closely related with subtribe Nepetinae. Although we could not detect any morphological synapomorphies for each clade, morphological variation seems to be correlated with the molecular phylogeny. A circular abscission scar without distinct lateral areole occurred mainly in Salviinae, while the majority of the species of Mentheae and Nepetinae had a clear areole at the abscission scar. In addition, a reticulate sexine ornamentation is rather common in the Menthinae clade. VL - 59 ER - TY - JOUR T1 - A search for phylogenetically informative pollen characters in the subtribe Salviinae (Mentheae : Lamiaceae) JF - International Journal of Plant Sciences Y1 - 2008 DO - 10.1086/526463 A1 - Hye-Kyoung Moon A1 - Stefan Vinckier A1 - Jay B Walker A1 - Erik Smets A1 - Suzy Huysmans SP - 455–471 KW - Distyly KW - Grains KW - Labiatae KW - Morphology KW - Orbicules KW - Palynology KW - Perovskia KW - Phylogeny KW - Pollen Dimorphism KW - Salviinae KW - Systematics AB - The pollen morphology and ultrastructure of the subtribe Salviinae were investigated with light, scanning electron, and transmission electron microscopy. In addition, cladistic analyses of the obtained morphological data, supplemented with rbcL data from GenBank, were conducted in order to assess the phylogenetic signal of palynological characters. Salviinae pollen is small to large, oblate to prolate in shape, with a circular to slightly elliptic amb, and mostly hexacolpate. Perovskia abrotanoides appears to be distylous and shows a significant pollen dimorphism between pin and thrum flowers. The sexine ornamentation of the genera Lepechinia and Chaunostoma is perforate, while the ornamentation of other genera is bireticulate. Perovskia expresses a unique type of sexine ornamentation. The sexine ornamentation variation in Salvia has systematic importance but only partly corresponds with current phylogenetic hypotheses. Unbranched columellae and a continuous, granular endexine are hypothesized to be a symplesiomorphic condition in the tribe Mentheae. Our combined phylogenetic analyses show that the addition of palynological characters contributes to improved resolution and also increases bootstrap support values in comparison with molecular phylogenetic analyses. VL - 169 UR - http://www.journals.uchicago.edu/doi/abs/10.1086/526463 ER - TY - JOUR T1 - Palynological evolutionary trends within the tribe Mentheae with special emphasis on subtribe Menthinae (Nepetoideae: Lamiaceae) JF - Plant Systematics and Evolution Y1 - 2008 DO - 10.1007/s00606-008-0042-y A1 - Hye-Kyoung Moon A1 - Stefan Vinckier A1 - Erik Smets A1 - Suzy Huysmans SP - 93–108 KW - Angiosperms KW - Bireticulum KW - Exine Ornamentation KW - Labiatae KW - Mentheae KW - Menthinae KW - Nepetoideae KW - Orbicules KW - Palynology KW - Phylogeny KW - Pollen Morphology KW - Salvia Lamiaceae KW - Sequence Data KW - Systematic Implications KW - Tapetum KW - Ultrastructure AB - The pollen morphology of subtribe Menthinae sensu Harley et al. [In: The families and genera of vascular plants VII. Flowering plants.dicotyledons: Lamiales (except Acanthaceae including Avicenniaceae). Springer, Berlin, pp 167-275, 2004] and two genera of uncertain subtribal affinities (Heterolamium and Melissa) are documented in order to complete our palynological overview of the tribe Mentheae. Menthinae pollen is small to medium in size (13-43 mu m), oblate to prolate in shape and mostly hexacolpate (sometimes pentacolpate). Perforate, microreticulate or bireticulate exine ornamentation types were observed. The exine ornamentation of Menthinae is systematically highly informative particularly at generic level. The exine stratification in all taxa studied is characterized by unbranched columellae. Orbicules are consistently absent in Menthinae. Our palynological data are interpreted in a phylogenetic context at tribal level in order to assess the systematic value of pollen characters and to evaluate the existing molecular phylogenies for this group. Pollen morphology suggests Heterolamium as a close relative of subtribe Nepetinae and supports the molecular affinity of Melissa to subtribe Salviinae. VL - 275 UR - http://www.springerlink.com/content/r53652ggm17k1457/ ER - TY - JOUR T1 - Phylogenetic significance of leaf micromorphology and anatomy in the tribe Mentheae (Nepetoideae: Lamiaceae) JF - Bot J Linn Soc Y1 - 2009 DO - 10.1111/j.1095-8339.2009.00979.x A1 - Hye-Kyoung Moon A1 - Suk-Pyo Hong A1 - Erik Smets A1 - Suzy Huysmans SP - 211–231 KW - Epidermal Characters KW - Epidermis KW - Essential Oil KW - Evolution KW - Genus KW - Glandular Hairs KW - Labiatae KW - Leaves KW - Monarda-Fistulosa KW - Morphology KW - Phylogenetics KW - Stomata KW - Systematics KW - Trichome KW - Trichomes KW - Vascular Bundle AB - A comparative micromorphological study of leaves was carried out on 102 species of Mentheae; 61 species were selected for the anatomical study. Mentheae possessed both amphistomatic and hypostomatic leaves. The diversity of leaf epidermal characteristics was based on the variation in morphology of epidermal cells, stomata types and trichome types. Although each characteristic on its own has rather limited systematic value, the combination of some of these features may be systematically relevant, especially for the identification of species. For example, branched multicellular nonglandular trichomes were a diagnostic characteristic for all genera investigated of the subtribe Salviinae; however, this trichome type was also observed in Hedeoma ciliolata and Neoeplingia leucophylloides of the subtribe Menthinae. Capitate glandular trichomes with pear-shaped heads were only observed in Salvia dorrii. Subsessile glandular trichomes with multicellular heads (more than ten cells) were an apomorphy for Perovskia. The anatomical leaf structure was consistent throughout the tribe. In some species, the vascular bundles in the midrib were modified into a mechanical tissue, which is an adaptation to xerophytic environments. The observed variations are discussed in an ecological context and their phylogenetic significance is evaluated. (C) 2009 The Linnean Society of London, Botanical Journal of the Linnean Society, 2009, 160, 211-231. VL - 160 ER -