Person: ÇELENK, SEVCAN
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ÇELENK
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SEVCAN
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Publication Comparative palynomorphological study of the genus Symphoricarpos (Caprifoliaceae): exine sculpture and implications for evolution(Taylor & Francis Inc, 2022-03-29) Tsymbalyuk, Zoya M.; Çelenk, Sevcan; Bell, Charles D.; Nitsenko, Lyudmila M.; Mosyakin, Sergei L.; ÇELENK, SEVCAN; Fen Edebiyat Fakültesi; Biyoloji Bölümü; 0000-0003-4925-8902; K-2981-2012Recent molecular phylogenetic studies of Dipsacales place Symphoricarpos in a clade containing Leycesteria, Triosteum, and Lonicera. The aim of this research was to analyze the palynomorphological features of taxa of Symphoricarpos and to compare the results with the taxonomic classification scheme and molecular phylogenetic data. Pollen morphology of 20 herbarium specimens belonging to 12 taxa of Symphoricarpos was studied using both light microscopy and scanning electron microscopy. Pollen are 3(4)-colporate, obtate to subprolate (Polar axis (P) /Equatorial diameter (E) = 0.73-1.21) in shape, and medium- and large-sized (P=27.93-62.51 mu m, E=25.27-69.16 mu m). Three types of exine sculpture are recognized in the genus: type I - psilate-perforate, type II - microechinate-nanoechinate, and type III - echinate-microechinate-nanoechinate. Within these pollen types, seven subtypes are distinguished based on details of the exine sculpture, pollen size, details of colpi, and presence/absence and width of annuli. It has been established that the important diagnostic features at the species level for the purposes of taxonomy of Symphoricarpos are the size of pollen grains, details of the colpi and ores, presence/absence and width of the annuli, and exine sculpture. The pollen morphology of Symphoricarpos taxa allows the establishment of hypotheses regarding the evolution of exine sculpture. In particular, we assume that there is an evolutionary trend toward a decrease in the size and number of echini and microechini. Echinate-microechinate-nanoechinate exine sculpture is hypothesized to be a plesiomorphic condition within the genus Symphoricarpos.Publication Outdoor airborne allergens: Characterization, behavior and monitoring in Europe(Elsevier, 2023-09-22) Grewling, Lukasz; Ribeiro, Helena; Antunes, Celia; Apangu, Godfrey Philliam; Costa, Ana; Eguiluz-Gracia, Ibon; Galveias, Ana; Roldan, Nestor Gonzalez; Lika, Mirela; Magyar, Donat; Martinez-Bracero, Moises; Orby, Pia; O'Connor, David; Penha, Alexandra Marcha; Pereira, Sonia; Perez-Badia, Rosa; Rodinkova, Victoria; Xhetani, Merita; Sauliene, Ingrida; Skjoth, Carsten Ambelas; Çelenk, Sevcan; ÇELENK, SEVCAN; Fen Edebiyat Fakültesi; Biyoloji Ana Bilim Dalı; 0000-0003-4925-8902; K-2981-2012Aeroallergens or inhalant allergens, are proteins dispersed through the air and have the potential to induce allergic conditions such as rhinitis, conjunctivitis, and asthma. Outdoor aeroallergens are found predominantly in pollen grains and fungal spores, which are allergen carriers. Aeroallergens from pollen and fungi have seasonal emission patterns that correlate with plant pollination and fungal sporulation and are strongly associated with atmospheric weather conditions. They are released when allergen carriers come in contact with the respiratory system, e.g. the nasal mucosa. In addition, due to the rupture of allergen carriers, airborne allergen molecules may be released directly into the air in the form of micronic and submicronic particles (cytoplasmic debris, cell wall fragments, droplets etc.) or adhered onto other airborne particulate matter. Therefore, aeroallergen detection strategies must consider, in addition to the allergen carriers, the allergen molecules themselves. This review article aims to present the current knowledge on inhalant allergens in the outdoor environment, their structure, localization, and factors affecting their production, transformation, release or degradation. In addition, methods for collecting and quantifying aeroallergens are listed and thoroughly discussed. Finally, the knowledge gaps, challenges and implications associated with aeroallergen analysis are described.Publication Allergenic Cupressaceae (cypress family) pollen concentrations in Turkey(Bilimsel Tip Yayinevi, 2010-01-01) Bıçakçı, Adem; BIÇAKÇI, ADEM; Tosunoğlu, Aycan; TOSUNOĞLU, AYCAN; Altunoğlu, Mustafa Kemal; Çelenk, Sevcan; ÇELENK, SEVCAN; Erkan, Perihan; ERKAN ALKAN, PERİHAN; Canıtez, Yakup; CANITEZ, YAKUP; Malyer, Hulusi; MALYER, HULUSİ; Sapan, Nihat; SAPAN, NİHAT; Tıp Fakültesi; Çocuk Sağlığı ve Hastalıkları Ana Bilim Dalı; 0000-0002-6333-3123; 0000-0003-4925-8902; 0000-0002-8837-3375; K-2981-2012; AAK-4004-2021; O-1244-2018Cupressus and Juniperus airborne pollen grains, belonging to the Cupressaceae family and causing respiratory system allergy by inhalation, have an important place among aeroallergens. In this study, airborne pollen studies were carried out in Turkey, and the monthly changes in Cupressaceae pollens rates in 57 regions were evaluated. Results of the studies showed that the highest numbers of Cupressaceae pollen grains were recorded between march and may.Publication Airborne pollen grains of Turkey(Bilimsel Tip Yayinevi, 2009-01-01) Bıçakçı, Adem; BIÇAKÇI, ADEM; CANITEZ, YAKUP; Altunoğlu, Mustafa Kemal; Bilişik, Aycan; Çelenk, Sevcan; ÇELENK, SEVCAN; SAPAN, NİHAT; Sapan, Nihat; Malyer, Hulusi; MALYER, HULUSİ; Fen Edebiyat Fakültesi; Biyoloji Bölümü; 0000-0002-6333-3123; 0000-0003-4925-8902; O-1244-2018; K-2981-2012In this evaluation, the results of aeropalynological studies carried out for 49 regions of Turkey have been assessed. The most common and greatest amounts of pollens in the atmosphere of Turkey were Cupressaceae, Pinus and Gramineae. The highest amount for pollen grains was recorded between March and June.Publication Detection of reactive allergens in long-distance transported pollen grains: Evidence from ambrosia(Elsevier, 2019-07-15) Celenk, Sevcan; ÇELENK, SEVCAN; Fen Edebiyat Fakültesi; Biyoloji Bölümü; Aerobiyoloji Laboratuvarı; 0000-0003-4925-8902; K-2981-2012The pollen of Ambrosia artemisiifolia (ragweed) is an important aeroallergen. The plant originated from North America and, has spread worldwide in recent decades. Air masses can transport pollen grains far from their source region and episodes of long distance transported (LDT) of ragweed pollen have been reported. The allergenic properties of LDT pollen grains can be altered by humidity, temperature and UV radiation. The aims of the study are to detect the major allergen of ragweed (Amb a 1) in the atmosphere of uninfested areas and to compare daily Ambrosia sp. pollen grains with Amb a 1 amount per m(3) of air. Samples for allergen detection were collected by ChemVol (R) sampler. ChemVol (R) collects particles at 800 l/min and contains 2 impaction stages (PM > 10 mu m and 10 > PM > 2.5 mu m). Samples collected on to filters were obtained during a 63 day period in the year 2014. Amb a 1 was recorded on 54 days and pollen grains of ragweed on 43 days. Diurnal average Amb a 1 concentrations ranged between 0.29 and 263.3 pg per cubic meter of air and correlated positively with daily average ragweed pollen concentrations. The average seasonal Ambrosia pollen allergen potency was 2.57 pg Amb a 1/pollen. The air mass movement was simulated using the HYbrid Single-particle Lagrangian Integrated Trajectory (HYSPLIT) model and back-trajectory paths were computed for four episodes. The findings suggest that ragweed pollen allergens still survive after at least 48 h during transport over long distances from allochthonous regions and are therefore a potential trigger of allergic reactions even in areas where ragweed is not widely dispersed.Publication Towards standardisation of automatic pollen and fungal spore monitoring: Best practises and guidelines(Springer, 2022-09-07) Tummon, Fiona; Bruffaerts, Nicolas; Çelenk, Sevcan; Choel, Marie; Clot, Bernard; Crouzy, Benoit; Galan, Carmen; Gilge, Stefan; Hajkova, Lenka; Mokin, Vitalii; O'Connor, David; Rodinkova, Victoria; Sauliene, Ingrida; Sikoparija, Branko; Sofiev, Mikhail; Sozinova, Olga; Tesendic, Danijela; Vasilatou, Konstantina; ÇELENK, SEVCAN; Biyoloji Bölümü; K-2981-2012Standards for manual pollen and fungal spore monitoring have been established based on several decades of experience, tests, and research. New technological and methodological advancements have led to the development of a range of different automatic instruments for which no standard yet exist. This paper aims to provide an overview of aspects that need to be considered for automatic pollen and fungal spore monitoring, including a set of guidelines and recommendations. It covers issues relevant to developing an automatic monitoring network, from the instrument design and calibration through algorithm development to site selection criteria. Despite no official standard yet existing, it is essential that all aspects of the measurement chain are carried out in a manner that is as standardised as possible to ensure high-quality data and information can be provided to end-users.Publication Assessment of heterogeneity of two cultivars of olea europaea based on the study of their Ole e 1 protein content(Springer, 2021-02-27) Çelenk, Sevcan; Vatansever, Buse; ÇELENK, SEVCAN; VATANSEVER, BUSE; Fen Edebiyat Fakültesi; Biyoloji Bölümü; Aerobiyoloji Laboratuvarı; 0000-0003-4925-8902; K-2981-2012; HZI-4564-2023Olive pollen is one of the main causes of allergic disease in the Mediterranean area. Ten different proteins with allergenic activity have been described in olive pollen, with major allergen Ole e 1. Olea europaea L. may cause allergenic effects of different severity depending on the Ole e 1 content of cultivars. In this paper, we aimed to assess the heterogeneity of two olive cultivars concerning concentrations of the major allergen Ole e 1 during a period of 2 years. Pollens from two most common olive cultivars, known as "Gemlik" and "Celebi," were analyzed on regular basis. Ole e 1 amounts were measured by double-sandwich enzyme-linked immunosorbent assay (ELISA). The results were expressed as mu g of Ole e 1 per mu g of total freeze-dried extract. Comparisons of Ole e 1 levels were made both between individual trees and between cultivars. It was analyzed the influence of some meteorological parameters on pollen counts/allergenic content on a local scale, for 2 years. Pollen sampling was carried out continuously for 2 years, using a Hirst-type volumetric trap. "Gemlik" had the higher value (mean +/- standard deviation) of Ole e 1 content (2.44 +/- 0.70 and 1.87 +/- 1.03 mu g/mu g, respectively) when compared to "Celebi" (2.16 +/- 0.86 and 0.20 +/- 0.30 mu g/mu g, respectively) in the years 2013 and 2015. In our research, daily variations were observed in pollen samples of two olive cultivars and even different trees of the same cultivar. Furthermore, during certain sampling days, discrepancies between airborne pollen counts and Ole e 1 concentrations were detected for both cultivars. It was found that meteorological changes, especially temperature and precipitation fluctuations, could affect airborne pollen and Ole e 1 allergen levels in the atmosphere. Therefore, pollen samples of different O. europaea cultivars demonstrated great differences in Ole e 1 content. We believe that these findings were a result of alternate bearing behavior modulated by meteorological factors.Publication Allergenic airborne olea (olive) and fraxinus (ash) pollen concentrations belonging to the oleaceae family in Turkey(Bilimsel Tip Yayinevi, 2009-01-01) Bıçakcı, Adem; TOSUNOĞLU, AYCAN; BIÇAKÇI, ADEM; Altunoğlu, Mustafa Kemal; SAPAN, NİHAT; ÇELENK, SEVCAN; Çelenk, Sevcan; Canıtez, Yakup; CANITEZ, YAKUP; Canıtez, Yakup; Malyer, Hulusi; MALYER, HULUSİ; Sapan, Nihat; TOSUNOĞLU, AYCAN; Tıp Fakültesi; Pediatri Ana Bilim Dalı; 0000-0002-6333-3123; 0000-0003-4925-8902; O-1244-2018; K-2981-2012One of the most important allergens causing allergic diseases of the respiratory system is airborne tree, grass and weed pollen grains. Oleaceae family members are very important in tree pollen grains. In this study, airborne pollen studies were carried out in Turkey, and the monthly changes in Olea and Fraxinus pollens rates for 55 regions were evaluated. In the studies carried out, the highest Fraxinus pollen grains were recorded in spring, and Olea pollen grains were recorded in late spring and early summer. According to atmospheric pollen studies, although Fraxinus pollen grains were found in more regions than Olea, more Olea pollen grains were recorded than of Fraxinus.Publication Pollen morphology of some species of the genus Cephalaria Schrad. (Caprifoliaceae) and its significance for taxonomy(Wiley, 2020-10-08) Tsymbalyuk, Zoya M.; Çelenk, Sevcan; Mosyakin, Sergei L.; Nitsenko, Lyudmila M.; ÇELENK, SEVCAN; Fen Edebiyat Fakültesi; Biyoloji Bölümü; 0000-0003-4925-8902; K-2981-2012Palynology gives the evidence for identification and elimination of taxonomically complex genera. Pollen morphology of nine species (three subg., three sect.) of the genus Cephalaria Schrad. was studied using light microscopy and scanning electron microscopy. Pollen grains of all investigated species are triporate, suboblate to subprolate (P/E = 0.75-1.28), and large-sized (P = 58.52 mu m-114.38, E = 63.84-119.70 mu m). The outline of pollen grains in equatorial view is circular or elliptic, in polar view circular, circular-triangular, or triangular. Pores are distinct, lolongate, elliptic, or circular, with an annulus, operculum, and distinct or indistinct, wide halo surrounding the aperture. Exine sculpture is echinate-microechinate or echinate-microechinate-nanoechinate. Additional diagnostic characters at the species level in Cephalaria Schrad. that can be used for the purposes of taxonomy are size of pollen grains and pores, the shape of pores, the width of the annulus, structure of the exine, dimension of echini and microechini, location of microechini, and presence/absence of nanoechini. Palynomorphological data are compared with the taxonomical classification system of investigated taxa. It is shown that pollen grains morphology of the genus Cephalaria Schrad. is similar to the pollen morphology of the genus Dipsacus L., which confirms their inclusion in the Dipsaceae tribe.Publication Daily pollen concentration of three allergenic families in the atmosphere of Bursa (NW Turkey), 2003-2004(Wiley, 2008-01-01) Çelenk, S.; Altunoğlu, M.; Canıtez, Y.; Bıçakcı, A.; Malyer, H.; Sapan, N.; ÇELENK, SEVCAN; Altunoğlu, Mustafa; CANITEZ, YAKUP; BIÇAKÇI, ADEM; MALYER, HULUSİ; SAPAN, NİHAT; Fen Edebiyat Fakültesi; Çocuk Alerji Ana Bilim Dalı; 0000-0001-6906-3403 ; 0000-0003-4925-8902 ; K-2981-2012; LKK-4133-2024; CJQ-2060-2022; O-1244-2018; DDS-8738-2022; FUI-8766-2022