Vegetative anatomy of some Ophrys, Orchis and Dactylorhiza (Orchidaceae) taxa in Trakya region of Turkey

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dc.contributor.authorAybeke, Mehmet
dc.contributor.authorSezik, Ekrem
dc.contributor.authorOlgun, Goeksel
dc.date.accessioned2024-06-12T10:51:38Z
dc.date.available2024-06-12T10:51:38Z
dc.date.issued2010
dc.departmentTrakya Üniversitesien_US
dc.description.abstractThe anatomical properties of leaves, stems, roots and root tubers of 27 taxa belonging to three orchid genera (Ophrys, Orchis and Dactylorhiza) were investigated to determine their diagnostic characteristics and assess interspecific and intergeneric relationships by means of cladistic analyses. Anatomical sections were done using different staining methods, such as Sartur, Phloroglucin-HCl, Delafield's Hematoxylin-Safranin, and Alcian Blue-Periodic Acid-Schiff. Additionally, lengths of raphides (in all the organs), cuticle thickness, cell size and stomata dimensions (in the leaf epidermes), as well as dimensions of starch granules (only in root tubers) were measured and statistically compared. During root tuber investigations, for every taxon the types of meristele were outlined and diagrammed. All morphometric data except starch grain dimensions, are generally not significantly different between the investigated taxa. The anatomical sections showed the following basic anatomical characteristics: Leaf surface was glabrous, stomata were abaxially located and mostly anomocytic. Cuticle was mostly striate. The chlorenchyma was homogeneous. The stem had a uniseriate epidermis with several rows of thick- or thin-walled, sclerenchymatous (or collenchymatous) cortical parenchyms, a pericycle, collateral vascular bundles within a central ground tissue. Orchis purpurea lacks a pericycle. The roots generally had a uniseriate epidermis, an exodermis, a parenchymatous cortex with occasional inclusions of fungal pelotons and hyphae, an endodermis bearing casparian strips, pericycle, and vascular cylinders. Root tubers, from the outside to the centre, had orderly velamen, exodermis, and ground tissue, which were scattered with meristeles, mucilage cells and assimilatory cells bearing cruciate starch grains. Based on the anatomical results, tables were created based on the important primary (species-specific) and secondary (common-specific, used only in some taxa) descriptive characteristics. Some of the primary descriptive characters include the following: Leaf-epidermal wall properties (thin/thick), chlorenchyma cell shape, chloroplast distribution, presence or absence of large lacunae; stem-presence/absence of pericycle, cortical thickness; root-cell shape of exodermis, presence/absence of tilosome passage cells, shapes of endodermal and/or pericycle cells, structures and distributions of archs; root tuber forms of starch grains and mucilage cells and meristele types. In general, leaf chlorenchyma and stem pericycle were found to be thicker and mucilage-water storage cells were more frequent in the Orchis and Dactylorhiza taxa. Cladistically analysed anatomical data support the hypothesis that Ophrys and Dactylorhiza are monophyletic, but contrast the triphyletic states of Orchis, which is very likely to be the reason for uncovering the other Orchis taxa. Finally, we strongly emphasize the importance of this kind of detailed anatomical study to solve identification problems of orchid taxonomy, which have wrongly been disregarded in recent works. (C) 2009 Elsevier GmbH. All rights reserved.en_US
dc.description.sponsorshipUniversity Scientific Researches Projects Foundationen_US
dc.description.sponsorshipThis research was the project TUBAP-396 supported by Trakya University Scientific Researches Projects Foundation. The authors thank to Assoc. Prof. Dr. Selcuk Yurtsever for helping with statistical and cladistic analysis.en_US
dc.identifier.doi10.1016/j.flora.2008.11.009
dc.identifier.endpage89en_US
dc.identifier.issn0367-2530
dc.identifier.issue2en_US
dc.identifier.scopus2-s2.0-75149129942en_US
dc.identifier.scopusqualityQ2en_US
dc.identifier.startpage73en_US
dc.identifier.urihttps://doi.org/10.1016/j.flora.2008.11.009
dc.identifier.urihttps://hdl.handle.net/20.500.14551/18430
dc.identifier.volume205en_US
dc.identifier.wosWOS:000275282100001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherElsevier Gmbh, Urban & Fischer Verlagen_US
dc.relation.ispartofFloraen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectAnatomyen_US
dc.subjectDactylorhizaen_US
dc.subjectOphrysen_US
dc.subjectOrchiden_US
dc.subjectOrchisen_US
dc.subjectCladistic Analysisen_US
dc.subjectPhylogenetic Analysisen_US
dc.subjectSystematicsen_US
dc.subjectSequencesen_US
dc.titleVegetative anatomy of some Ophrys, Orchis and Dactylorhiza (Orchidaceae) taxa in Trakya region of Turkeyen_US
dc.typeArticleen_US

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