T. Dirmenci

Balıkesir University · Department of Biology

Cyto/genotoxicity have been widespread utilized for the safety risk assessment of synthetic/natural chemicals. Plants can protect organisms from harmful effects of xenobiotics. On the other hand, plants can extract toxic molecules from the environment which may disrupt mitosis and cytokinesis. However, the precise role of Cirsium steriolepis during...

A revision of Clinopodium L. s.l., including species of Acinos Mill., Calamintha Mill. and Micromeria Benth. sect. Pseudomelissa Benth. which occur Iraq, recognises five species, one of which, C. dokanicum Dirmenci, is newly described and endemic to northern Iraq. An identification key and distribution map are provided, as well as updated nomenclatur...

Context The genus Sideritis L. (Lamiaceae) is represented by 46 species in Turkey with an 79% endemism ratio, 42 of 46 belonging to the section Empodoclia. Objective In this review article, Sideritis species growing in Turkey have been evaluated for phytochemical constituents and biological activities. Methods The data for the isolates, component...

Bu çalışmada Cirsium cinsine ait yeni bir hibrit olan Cirsium × giresunicum tanımlanmaktadır. Cinsin Epitrachys seksiyonunda yer alan C. poluninii ve C. trachylepis türleri arasında oluşan bu hibrit, morfolojik ve moleküler açıdan analiz edilmiştir. Morfolojik incelemelerde yeni hibritin bazı özelliklerini ebeveynleri ile paylaştığı, bazı özellikle...

The floras on the highest mountains in tropical eastern Africa are among the most unique floras in the world. Despite the exceptionally high concentration of endemic species, these floras remain understudied from an evolutionary point of view. In this study, we focus on the Carduus-Cirsium group (subtribe Carduinae) to unravel the evolutionary rela...

Biogeographic disjunctions, including intercontinental disjunctions, are frequent across plant lineages and have been of considerable interest to biologists for centuries. Their study has been reinvigorated by molecular dating and associated comparative methods. One of the "classic" disjunction patterns is that between Eastern Asia and North Americ...

While revising the genus Ziziphora for the Flora of Iraq and Turkey, we recognise seven subspecies for Z. clinopodioides. An identification key to these subspecific taxa is presented. A new subspecies, Z. clinopodioides subsp. brevistamina, is described and Ziziphora brantii is given a new subspecific status as Z. clinopodioides subsp. brantii. We...

This study aims to describe a new hybrid of Origanum, which occurs on Karpathos (Greece), by examining its morphology and molecular structure. Nuclear ribosomal DNA (ITS) data of the alleged hybrid specimens, and its putative parents, O. onites and O. vetteri, were examined. Hybrid and parent individuals sharing the same location with the new hybri...

Background and Aims: Origanum × symes was described as a new species by Carlström in 1984 on the Aegean Island of Symi (Dodecanese, Greece). In this work, a taxonomic re-evaluation of O. symes is proposed in light of new findings. Methods: New specimens belonging to Origanum symes from the island of Symi were collected by the first author in 2017....

Nepeta is one of the largest genera of the Lamiaceae family. Nepeta species are commonly employed in traditional medicine for a variety of ailments, as well as food additives. In addition, they also come to the fore with their rich phytochemical content. In the present study, the quantitative phytochemical content of methanolic extracts and infusio...

Abstract Chromosomal data and karyological relationships provides valuable contributions to understanding speciation and karyotypic phylogeny. Because of the large number of species, wide distribution, morphological differences and chromosomal variations, Geranium is an important genus for determining the relationship between chromosomal alteration...

Medicinal plants have been used by humans for the treatment of various diseases for thousands of years from past to present. Members of the Lamiaceae family are among the most preferred medicinal plants due to the wide variety of secondary components they contain, particularly essential oils. In this review, Master’s and PhD theses and books based...

In this study, total phenolic, flavonoid and protein contents, antiradical capacities, antibacterial and cytotoxic properties of five different Salvia species ( Salvia macrochlamys Boiss., Salvia kronenburgii Rech.f., Salvia euphratica Montbret. ex Aucher var. euphratica , Salvia huberi Hedge and Salvia kurdica Benth) were investigated. The total p...

Obesity is a risk factor for metabolic disorders causes serious health problems and economic costs globally. Some Cirsium genus has been reported to possess anti-obesity effect and traditional uses for vascular diseases, anti-inflammatory and diuretic effects. This study aims to investigate the therapeutic value of endemic Cirsium species for obesi...

Stachys siirtensis (Lamiaceae), a new endemic species from Botan Valley of Siirt province in Turkey, is here described. The species is characterized by having congested verticillasters. Hairiness, calyx and corolla length, as well as nutlet and the arrangement of verticillasters, have been used to distinguish Stachys species. Stachys siirtensis is...

Origanum is a well-known genus that is widely distributed and comprises many hybrids and endemic species in Turkey. Some morphological and molecular studies in the literature have aimed to clarify infrageneric or sectional classification of the genus. However, studies regarding the shape, size, and color of mericarps of Origanum taxa remain limited...

Generic delimitations within the cosmopolitan Carduus-Cirsium group (i.e., "thistles") have a long history of taxonomic confusion and debate. We present the most comprehensive molecular phylogeny of the group to date to test generic limits, reconstruct the evolution of pappus type, and elucidate the role of chromosomal evolution. We offer two solut...

In this study, chromosome numbers and structures of some Origanum L. taxa growing in Turkey were identified. Using the Image Analysis System, the complements of plant accessions belonging to eight sections, namely Amaracus (Gleditsch) Vogel, Anatolicon Benth., Brevifilamentum Ietsw., Longitubus Ietsw., Chilocalyx (Briq.) Ietsw., Majorana (Miller) I...

The aerial parts of Satureja metastasiantha were hydrodistilled for 3 h using a Clevenger-type apparatus. The essential oils were analyzed by gas chromatography/flame ionization detector and gas chromatography/mass spectrometry, simultaneously, the main compounds of which were characterized as p-cymene (22.3%), thymol (21.0%), carvacrol (18.4%), an...

Origanum L. is one of the high‐value medicinal and aromatic plants generally used for various purposes in the field of food and health. This study evaluated the effect of aqueous extract, hydrosol and essential oil forms of seven Origanum taxa including three endemic species in fresh‐cut mushroom samples in order to prevent polyphenol oxidase (PPO)...

Secondary metabolites of solvent extracts of Origanum vulgare subsp. hirtum and O. vulgare subsp. vulgare were determined using liquid chromatography–mass spectrometry (LC-MS/MS). Curcumin was used as an internal standard. Rosmarinic acid was determined as the main compound of studied extracts together with other phenolic acid derivatives. In LC-MS...

Teucrium L. is a well-known and cosmopolitan genus of the Lamiaceae family. In Turkey, the genus is represented by 36 species (48 taxa). Teucrium Sect. Teucrium that this study focuses on comprises around 30 species worldwide and is mainly distributed in countries of the Mediterranean Basin. With 11 species (14 taxa), it is the second-largest secti...

Chromosomal data are valuable and very useful for revealing evolution and speciation processes. Due to its wide distribution throughout the world, morphological differences, and chromosomal alterations, Erodium L’Hér. is an important genus for investigating the relationship between chromosomal alterations and karyotype evolution. In the present stu...

In this study, three hybrids of Origanum (Lamiaceae) were examined in detail using morphological, karyological, palynological and molecular approaches. One of the three hybrids, O. × aytacii, is here described for the first time, and is compared with its putative parents, O. sipyleum and O. vulgare subsp. hirtum. In addition to morphological, karyo...

Hybrid specimens can be occurred as same ploidy level (homoploidy) or not (polyploidy) with its parents. Homoploid hybrids are originated without any change in their ploidy level (2n) and polyploid hybrids are produced with the change in ploidy level (3n, 4n etc.). According to recent studies, the frequency of natural hybridization (homoploid and p...

Based on combined results of different approaches we describe two new natural hybrids, Origanum × bilgilii Dirmenci, T. Yazıcı & Arabacı and O. × dumanii Dirmenci, Arabacı & T. Yazıcı from southern Turkey (Antalya). They have a common parent, Origanum saccatum. Morphology and pollen micromorphology of the collected plants were studied, and a compar...

Origanum boissieri Ietsw., O. saccatum P.H.Davis, O. solymicum P.H.Davis and O. ayliniae Dirmenci & T.Yazıcı belonging to sect. Amaracus (Gled.) Vogel, O. sipyleum L. and O. hypericifolium O.Schwarz & P.H.Davis belonging to sect. Anatolicon Ietsw. were analyzed for their chemical composition of essential oil and phenolic components. The essential o...

Two new taxa of Hypericum are described from Turkey — H. cuisinii Barbey subsp. anatolicum Dirmenci & N.Robson from Aydin province and H. kemaliyensis Dirmenci & N.Robson from Erzincan province, and their relationships are discussed.

Herbal medicine has been used worldwide as an alternative treatment. Salvia genus is one of the most remarked herbs which is traditionally used in the treatment of many diseases. Therefore, it is a crucial issue to reveal the chemical and biological profiles of different Salvia species. Rosmarinic and carnosic acid are the most well-known bioactive...

Abstract: In this study, three new hybrids from the genus Cirsium are described for the first time. Cirsium ×nezaketiae Yıldız, Dirmenci & Arabacı, C. ×kelkitensis Yıldız, Arabacı & Dirmenci, and C. ×erzincanicum Yıldız, Dirmenci & Arabacı are investigated in detail morphologically, palynologically, and molecularly. The hybrid individuals were dete...

Origanum munzurense Kit Tan & Sorger (Sect. Brevifilamentum Ietsw.) was described by Kit Tan & Sorger in 1984, and it is an accepted species related to O. acutidens (Hand.-Mazz.) Ietsw. belonging to sect. Brevifilamentum. It is morphologically intermediate between O. acutidens and O. vulgare L. subsp. gracile (K.Koch) Ietsw., and its type locality...

This study aimed to determine the physicochemical soil properties of genus Origanum L. (in Turkish: Mercanköşk) grown in Turkey. Soils samples were collected from 22 localities where the 24 Origanum taxa grown. Soil texture, pH, electrical conductivity, CaCO3, organic matter, P, K, Cu, Fe, Zn, and Mn parameters were evaluated for each sample. Accor...

Two new hybrids of Origanum, O. ×malyeri and O. ×sevcaniae, are described and illustrated in detail. The general morphology, pollen and chromosome features, and nuclear (ITS) and chloroplast (rpl32) genomes of collected specimens were studied. Origanum ×malyeri is a hybrid between O. boissieri and O. vulgare subsp. hirtum and O. ×sevcaniae is anoth...

Lamiaceae is the third largest family based on the taxon number and fourth largest family based on the species number in Turkey. The family has 48 genera and 782 taxa (603 species, 179 subspecies and varieties), 346 taxa (271 species, 75 subspecies and varieties) of which are endemic (ca. 44%) (data updated 1 th February 2017) in the country. There...

Trichome micromorphology can be used as a discriminating character in the separation of species and subspecies. The micromorphological characteristics of foliar trichomes from five Teucrium taxa (T. scordium subsp. scordium, T. sirnakense, T. chasmophyticum, T. andrusi and T. spinosum) were investigated by scanning electron microscope. Seven types...

In this study we have aimed to investigate nutlet surfaces of Turkish Origanum L.species in the light of new systematic developments by SEM.

In this study, we have aimed to investigate pollen characters using a light microscope (LM) and DNA sequence differentiation of a hybrid taxon of Nepeta L. and its parents.

Teucriumalyssifolium Stapf (endemic), Teucriumpestalozzae Boiss. (endemic) and Teucriumbrevifolium Schreb. are three closely related taxa in Teucriumsect.Teucrium. The obtained data from the anatomical studies revealed that these three taxa represent the general anatomical characteristics of the Lamiaceae family. Leaves, anatomical features such as...

The genus Pentapleura Hand.-Mazz. (Lamiaceae) is represented by only one species Pentapleura subulifera Hand.-Mazz and distributed in southeast of Turkey and north Iraq. The stem and leaf of the species were examined for anatomical studies. The stems are rectangular in shape and the leaves are equifacial type. The micromorphologic properties of tri...

Nutlet and leaves micromorphology of 27 Teucrium taxa were examined using SEM. The significant variation was found on the nutlet surface ornamentation and indumentum and this is mainly useful at the sectional level. Besides, trichome micromorphology is crucial to distinguish of some species inside some sections. The epidermal features of the nutlet...

Six Origanum species, Origanum acutidens (Hand.-Mazz.) Ietsw. (OA), Origanum brevidens (Bornm.) Dinsm. (OB), Origanum haussknechtii Boiss. (OC), Origanum husnucan-baseri H.Duman, Aytaç & A.Duran (OHB), Origanum leptocladum Boiss. (OL), Origanum rotundifolium Boiss. (OR), belonging to sect. Brevifilamentum were analyzed for their essential oil and p...

nrITS and chloroplast trnL-trnF DNA data of Turkish Teucrium members

A new hybrid from Turkey

Anatomical and micromorphological structure of Teucrium ekimii

Nutlet pericarp structures of some Turkish Teucrium members

A new hybrid of Origanum from Turkey

Phylogenetic relationship of Micromeria Benth. (Lamiaceae) species growing in Turkey

Pollination mechanisms and pollinator types of some Teucrium members

A new species, Cirsium bozkirensis H.Duman, Dirmenci & Tugay (Asteraceae), Cirsium sect. Epitrachys DC, is described from Konya Province, South Anatolia, Turkey. Diagnostic and morphological characteristics that distinguish it from allied species C. cephalotes Boiss. and C. pugnax Sommier & Levier. are provided. A description, distribution map, and...

A new species, Micromeria aybalae H.Duman & Dirmenci (Lamiaceae), Micromeria Benth. sect. Micromeria, is described from Muğla Province in southwestern Turkey. A description, taxonomic note, distribution map, habitat, and nrDNA ITS and cpDNA trnL-F based phylogeny are presented. The differences between the new species and its allies, Micromeria crem...

Origanum ayliniae Dirmenci & Yazıcı, which differs significantly from O. dictamnus L., is described for the first time in this paper. In addition, a new hybrid, O. × adae Dirmenci & Yazıcı, between O. ayliniae and O. sipyleum L., is described and investigated in detail. The general morphology, pollen structure, chromosome features, and nuclear (ITS...

Aerial parts of Lophanthus turcicus Dirmenci, Yıldız & Hedge. were subjected to hydrodistillation and the obtained oil was analyzed by GC and GC-MS. Thirty-six compounds were identified representing 96.4% of the total oil, and the main compounds were found to be spathulenol (14.3%), globulol (13.8%), ledene (11.8%) and pulegone (10.2%). The oil was...