Ergin Hamzaoğlu

New halophytic syntaxa from Central Anatolia (Turkey)

The research was carried out on the salt marsh vegetation covering the halophytic formations in Salt Lake and Seyfe Lake, in the middle part of Central Anatolia. The vegetation, which is under the influence of an arid and a semiarid, cold, and very cold Mediterranean climate, was analyzed according to the Braun-Blanquet approach. According to ecological and floristic characteristics, two new alliances, Lepidio caespitosi-Limonion iconici and Inulo aucheranae-Elymion salsi, and six new plant associations were described in the area.

SYNTAXONOMIC RESEARCH ON THE GYPSICOLE VEGETATIONIN CAPPADOCIA, TURKEY

The research was carried out on the steppe vegetation covering the gypsiferous formations in Cappadocia, the eastern part of Central Anatolia. The vegetation, which is under the influences of a semiarid, very cold Mediterranean climate, was analyzed according to the Braun-Blanquet approach. A new suballiance,Helichryso-Thymenion cappadosici of the alliance Astragalo karamasici-Gypsophilion eriocalycis and five new plant associations were described in the area.

Silene ozyurtii (Caryophyllaceae), a New Species from Anatolia, Turkey

A new species, Silene ozyurtii Aksoy & Hamzaoğlu (Caryophyllaceae), is described from the north parts of western Taurus facing central Anatolia, between the Konya and Isparta provinces, in southwest Anatolia, Turkey. The species is compared with morphologically similar taxa in sect. Tunicoideae.

Antimicrobial and antioxidant activities of Senecio species growing in the Black Sea region, Turkey

Abstract Total phenolic contents, antioxidant and antimicrobial activities of methanol extracts of six Senecio species growing in the Black Sea region of Turkey (S. pandurifolius, S. trapezuntinus, S. integrifolius subsp. aucheri, S. hypochionaeus var. argaeus, S. hypochionaeus var. ilkasiensis and S. orentii) are investigated. The total phenolic content is analysed using Folin- Ciocalteus reagent of the methanol extracts and varies from 19.54 to 81.78 mg GAE/g dry extract. The methanol extracts of the studied species possess antioxidant properties in the range of 70.07–165.21 mg AAE/g dry extract in phosphomolybde- num assay. S. hypochionaeus var. ilkasiensis extract shows maximum activity with an IC50 of 15.94 μg/ml in DPPH free radical scavenging assay. All of the Senecio methanol extracts show similar antimicrobial activities against microorganisms tested by agar diffusion methods. Klebsiella pneumoniae is the most sensitive microorganism to the all extracts examined while Escherichia coli and Candida albicans are the most resistant one.

Phytosociological studies on salty steppe communities of Central Anatolia, Turkey

The salty steppe vegetation of the Central Anatolian subregion of the Irano-Turanian phytogeographical region was examined synecologically and syntaxonomically. In the vegetation surrounding the salt lakes of this region, a new alliance Achilleo wilhelmsii-Artemision santonici and two new associations belonging to it were described. These syntaxa were attached to order Onobrychido armenae-Thymetalia leucostomi Akman, Ketenoglu, Quezel 1985, which characterizes the Central Anatolian steppes, and the classic Astragalo microcephali-Brometea tomentelli Quezel 1973, which includes a vast part of the Turkeys steppe vegetation.

NEW SYNTAXA FROM CAPPADOCIA (KIRSEHIR, TURKIYE)

ABSTRACT A new alliance Alysso lepidoto-stellati-Astragalion condensati of steppe communities spreading on the calcareous soils in the Kargasekmez, Kervansaray, and Naldoken mountains in the southeastern part of Central Anatolia, has been investigated and described.

Investigation on the effects of pomiferin from Maclura pomifera on indomethacin-induced gastric ulcer: An experimental study in rats

Previously, water extract of Maclura pomifera plant has been found effective on gastric damage. In this study, pomiferin product was purified from this plant by thin-layer chromatography method and its structure was elucidated by nuclear magnetic resonance methods. Its antiulcer effect was investigated on indomethacin-induced gastric damage in rats. For this study, a total of 36 Sprague Dawley female rats were divided into six groups such as healthy, control, reference, and three treatment groups (n = 6 each). Ranitidine (Ulcuran® 25 mg/ml vial) was used as reference. Biochemically, lipid peroxidation, and glutathione levels as well as superoxide dismutase, catalase, myeloperoxidase, and cyclooxygenase isoenzymes activities were measured in stomach tissues. Comparing with healthy group, ulcerative area was observed in control group (only administered to indomethacin group). However, Ulcerative area in stomach tissues of rats administered of all doses of pomiferin and ranitidine showed significant decrease (p < 0.05). Also, there were significant changes at the antioxidant levels (lipid peroxidation, glutathione, superoxide dismutase, and catalase) and some important enzyme activities (myeloperoxidase, cyclooxygenase isoenzymes). We found that pomiferin was effective on gastric damage induced by indomethacin. This effect was thought to be caused by positive changes in the antioxidant system.

Presence of Dianthus roseoluteus Velen. (Caryophyllaceae) in Turkey and a New Species: Dianthus macroflorus Hamzaoğlu

Abstract The presence of Dianthus roseoluteus Velen. species in Turkey is based on specimens collected from Antalya province. After the publication of Flora of Turkey, many specimens have been collected from Thrace (Kırklareli and Edirne provinces) that belong to this species. A comparison of the specimens collected from Antalya and Thrace revealed that they were morphologically different. The literature survey verified that the specimens collected from Thrace were Dianthus roseoluteus. The species collected from Antalya province is a new species, Dianthus macroflorus Hamzaoglu, and its description, pictures, distribution, habitat, and threatened categories are given. Its general morphology and seed micromorphology are compared with the related species, Dianthus roseoluteus. In addition to phylogenetic relationships between some closely related Dianthus species that belong to section Dentati in Turkey, Dianthus macroflorus and 13 additional Dianthus species sequences obtained from GenBank were examined with DNA sequence data from the nuclear ribosomal ITS region. These analyses were supported with morphological data.

Dianthusaticii, a new species from Turkey (Caryophyllaceae).

Abstract During the taxonomic revision of the Turkish Dianthus species, specimens collected from Bilecik, Seben (Bolu), and Nallıhan (Ankara) were discovered that represent a new species. Its description, images, chorology, ecology, and threat category are provided. It was compared with a closely related species, Dianthus zonatus, and differences are based on its general morphology and seed micromorphology.

Bolanthusturcicus (Caryophyllaceae), a new species from Turkey.

Abstract A new species Bolanthus turcicus Koç & Hamzaoğlu, sp. nov. was discovered on Hasan Mountain (Turkey, Aksaray province) where it grows on volcanic stony slopes and alpine steppe. its description, images, chorology and ecology, and threat category are provided in this article. It was compared with a closely related species, Bolanthus minuartioides (Jaub. & Spach) Hub.-Mor., Bolanthus huber-morathii C.Simon, Bolanthus spergulifolius (Jaub. & Spach) Hub.-Mor., Bolanthus frankenioides (Boiss) Bark., Bolanthus mevlanae Aytaç based on its general morphology and seed micromorphology.