Gülnur Ekşi Bona

ORCID: 0000-0002-6869-8703
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Research Areas
  • Essential Oils and Antimicrobial Activity
  • Phytochemistry and Biological Activities
  • Garlic and Onion Studies
  • Plant Ecology and Taxonomy Studies
  • Phytochemistry and biological activities of Ficus species
  • Natural product bioactivities and synthesis
  • Plant Diversity and Evolution
  • Phytochemicals and Antioxidant Activities
  • Nephrotoxicity and Medicinal Plants
  • Banana Cultivation and Research
  • Chemical synthesis and alkaloids
  • Bee Products Chemical Analysis
  • Mycorrhizal Fungi and Plant Interactions
  • Ethnobotanical and Medicinal Plants Studies
  • Cholinesterase and Neurodegenerative Diseases
  • Phytochemical Studies and Bioactivities
  • Plant and Fungal Species Descriptions
  • Phytochemistry and Bioactivity Studies
  • Reconstructive Facial Surgery Techniques
  • Genomics, phytochemicals, and oxidative stress
  • Biological Activity of Diterpenoids and Biflavonoids
  • Bioactive Natural Diterpenoids Research
  • Plant Pathogens and Resistance
  • Potato Plant Research
  • Tea Polyphenols and Effects

Istanbul University-Cerrahpaşa
2024-2025

Bakırköy Psychiatric Hospital
2025

Istanbul University
2024

Istanbul Medipol University
2021-2023

Ankara University
2015-2021

Allium purpureotunicatum Aytaç, Ekşi & Koçyiğit (Amaryllidaceae), a new species of sect. Scorodon, is described and illustrated from Kütahya Province, western Turkey. It narrowly distributed geophyte growing on calcareous marl slopes, resembling closely A. sibthorpianum rumelicum. differs those by its shorter tepals, longer filaments pistil morphology. also resembles stamineum having pink flowers, stamens significantly than perigon, spherical ovary, but it coriaceous, distinctly striped...

10.5735/085.061.0115 article EN Annales Botanici Fennici 2024-03-28

Abstract Diabetes mellitus (DM) and cancer are multifactorial diseases with significant health consequences, their relationship aging makes them particularly challenging. Epidemiological data suggests that individuals DM more susceptible to certain cancers. This study examined the bioactive properties of Hypericum scabrum extracts, including methanol, hexane, others, focusing on inhibitory effects key enzymes associated neurodegenerative diseases, such as acetylcholinesterase,...

10.1007/s00709-025-02037-1 article EN cc-by PROTOPLASMA 2025-01-30

Objective: Peganum harmala L., commonly known as "harmala," is extensively used an herbal incense product today and renowned for its reported calming effects on humans. This study aims to perform a structural characterization of incense, with particular focus fruit seed components, by analyzing both the combustion process dissolving resulting smoke in appropriate solvent. Additionally, we aim contribute literature investigating presence hallucinogenic compounds this incense. Simultaneously,...

10.33483/jfpau.1532753 article EN Ankara Universitesi Eczacilik Fakultesi Dergisi 2025-01-13

The objective of the current study was to investigate influence Allium tuncelianum (AT) extract on wound healing in a nasal septum perforation (NSP) model. Twenty-two healthy male Sprague-Dawley rats were included this and separated into two groups. A standardized NSP created each subject. 0.09% saline (control group) 25% AT solution (study delivered intranasally daily for 14 days. At end experiment, subjects sacrificed septa excised histopathological investigation. macroscopic closure rate...

10.1002/lio2.70095 article EN cc-by-nc-nd Laryngoscope Investigative Otolaryngology 2025-02-01

ABSTRACT Salvia pachystachya is a medicinally promising plant species, yet its pharmacological properties remain underexplored. This study aimed to investigate anatomical, phytochemical and bioactive characteristics assess therapeutic potential comprehensively. Microscopic analysis revealed distinctive anatomical features, including quadrangular stems glandular trichomes on leaves, providing valuable insights into the plant's structural properties. Phytochemical profiling of methanol aqueous...

10.1002/ffj.3864 article EN Flavour and Fragrance Journal 2025-04-07

ABSTRACT Nepeta is one of the largest genera in Lamiaceae family. The aim this study to evaluate (DPPH • and ABTS + scavenging tests), antidiabetic ( α ‐amylase ‐glucosidase enzymes inhibition), anticholinesterase (acetylcholinesterase butyrylcholinesterase inhibition) activities methanolic, aqueous extracts essential oils obtained from flowering aerial parts N. cilicia Boiss. ex Benth., isaurica & Heldr. sulfuriflora P.H.Davis. Furthermore, extracted these plants were analysed for their...

10.1002/ffj.3869 article EN Flavour and Fragrance Journal 2025-04-22

Salvia species are cultivated for their aromatic characteristics and used as flavourings, food condiments, cosmetics. In this study, chemical constituents of the essential oil aucheri subsp. canascens S. heldreichiana were determined by GC-FID GC-MS systems. α-Pinene (9.5, 13.1%), 1,8-cineole (21.2, 9.1%), β-caryophyllene (5.7, 9.0%) borneol (6.0, 6.4%) main components heldreichiana, respectively. addition, major compounds found camphor (19.1%), camphene (7.3%) β-pinene (4.1%) oils. Sabinene...

10.1080/10412905.2023.2299855 article EN Journal of Essential Oil Research 2024-01-02

In this study, the cypsela micro-macromorphological characteristics of 15 Centaurea L. taxa, from seven sections Turkey were investigated using Light Microscopy and Scanning Electron techniques. The studied taxa are C. goksivriensis M. Bona, calcitrapa subsp. L., cilicica (Boiss. & Bal.) Wagenitz, glastifolia amanicola Hub.-Mor., cataonica Boiss. Hausskn. in Boiss., haradjianii haussknechtii regia var. regia, sclerolepis spicata solstitialis behen rigida Banks Sol., antitauri Hayek. They...

10.5252/adansonia2023v45a2 article EN publisher-specific-oa Adansonia 2023-01-30

Allium Linneaus (1753: 294) is one of the largest monocot genera with about 900 species (Govaerts et al. 2019) naturally distributed throughout northern hemisphere (Stearn 1978, 1992, Fritsch & Keusgen 2006, Friesen Abbasi 2008). The main centre biodiversity occurs in Southwestern and Central Asia Mediterranean region, a smaller center found western North America (Friesen Nguyen genus characterized by bulbs enclosed membranous, fibrous or reticulate tunics, free basally connate tepals...

10.11646/phytotaxa.400.1.4 article EN Phytotaxa 2019-04-01

Allium ekimianum is described here as a new species. This taxon belongs to the genus section and grows in Elazığ Province (East Anatolia, Turkey). It narrowly distributed species morphologically most similar A. asperiflorum sintenisii, erzincanicum but it clearly differentiated due curved stem, smooth pedicel surfaces, bracteole arrangements at bases, tepal lengths surfaces. In this study, comprehensive description, distribution map of ekimianum, identification key, detailed illustrations...

10.3897/phytokeys.62.7796 article EN cc-by PhytoKeys 2016-04-06

Allium shahinii, a new species of sect. Scorodon, is described and illustrated from Erzincan Province, Eastern Turkey. It narrowly distributed geophyte growing on siliceous screes warm exposure in mountain ranges the nemoral thermophilous deciduous woodland zone, showing close morphological relationships mainly with A. moschatum, stocksianum, spirophyllum, circumflexum but it clearly differentiated due to perigon, outer tunic, indumentum, leaf scape characteristics. In this study, diagnostic...

10.11646/phytotaxa.461.3.6 article EN Phytotaxa 2020-10-06

Alzheimer’s disease is the main reason for dementia, which increases with age. Cholinesterase inhibition and antioxidant potentials of extracts essential oils from bulbs A. tuncelianum (Kollmann) Özhatay & al., an endemic species to Tunceli (easthern Turkey), were evaluated. The fraction extracted ethyl acetate had highest phenolics level, 1,1-diphenyl-2-picrylhydrazyl, thiobarbituric acid capacity. Also, presented acetylcholinesterase (15.98 ± 2.76%), butyrylcholinesterase (47.33...

10.3989/ajbm.2523 article EN cc-by Anales del Jardín Botánico de Madrid 2019-11-15

Clinopodium nepeta subsp. glandulosum (Req.) Govaerts is a natural perennial grass belonging to the Lamiaceae family, growing spontaneously on Mediterranean coast. It locally known as “kedi fesleğeni” in Turkey. This aromatic plant used mint-like spice food preparations and composition of some recipes during religious feasts. In folk medicine, it stimulant, antiseptic antispasmodic. Aerial parts C. were collected from Bilecik July 2017, was air dried. The essential oil isolated by...

10.37929/nveo.949959 article EN NVEO - NATURAL VOLATILES &amp ESSENTIAL OILS Journal | NVEO 2021-09-10

Allium L. is an extremely polymorphic and taxonomically difficult genus with a natural distribution in the northern Hemisphere. The most recent classifications of are based on morphological characters molecular data, which c. 850 species 15 subgenera 56 sections recognised (Friesen et al., 2006; Koyuncu Eker, 2011; Celep 2012; Genc Ozhatay, 2013). In Turkey, represented by 177 species, 72 endemic (Ozhatay, 2000; Guner, 2012). Flora Turkey East Agean Islands classified into 14 sections,...

10.81043/aperta.80099 article EN Bangladesh Journal of Plant Taxonomy 2015-12-28

Garlic and onions are used as food for medicinal purposes worldwide. Allium L. species rich in bioactive organosulphur compounds that exhibit many biological activities like anticancer, antimicrobial, antihypertensive, antidiabetic activities. In this study, macro- micromorphological characteristics of four taxa were examined the results suggested A. callimischon subsp. haemostictum was outgroup to sect. Cupanioscordum. Also, genus Allium, which is a taxonomically difficult genus, hypothesis...

10.1002/cbdv.202201194 article EN Chemistry & Biodiversity 2023-04-07

Vinca ispartensis Koyuncu & Ekşi sp. nova (Apocynaceae) is described and illustrated. It grows in calcareous, stony locations Isparta Province (southwest Anatolia, Turkey). morphologically close to V. herbacea soneri; the diagnostic morphological characters of three taxa are discussed. An identification key genus Turkey provided.

10.5735/085.052.0511 article EN Annales Botanici Fennici 2015-11-27
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