Peyzaj Mimarlığı Bölümü / Department of Landscape ArchitecturePeyzaj Mimarlığı Bölümüne ait koleksiyonları listeler.https://hdl.handle.net/11729/292024-03-29T12:41:14Z2024-03-29T12:41:14ZIsıtma işleminin kızılçam (Pinus brutia Ten.) tohumlarının çimlenmesine etkisiÇetin, BilalBoydak, Melihhttps://hdl.handle.net/11729/50022022-10-12T19:29:55Z2013-03-01T00:00:00ZIsıtma işleminin kızılçam (Pinus brutia Ten.) tohumlarının çimlenmesine etkisi
Çetin, Bilal; Boydak, Melih
Bu çalışmada, Anamur ve Mersin yörelerinden seçilen 2 kesitteki 4’er yükselti kuşağından (0-400 m, 400-800 m, 800-1200 m ve ≥1200 m) toplanan kızılçam (Pinus brutia Ten.) tohumlarına ısıtma işlemi (1, 3, 5 ve 7 dakika) uygulanmış ve bu tohumların çimlenme özelliklerindeki değişim irdelenmiştir. Araştırmada, ısıtma işlemi uygulanan tohumların hangi sıcaklıkta çimlendirileceğini tespit etmek amacıyla 15, 20 ve 25oC ön çimlendirme testleri yapılmış ve sırasıyla %44,2, %68,1 ve %52,0 çimlenme yüzdeleri elde edilmiştir. Bu çimlendirmelerde en yüksek çimlenmeler her iki kesitte ve bütün yükselti kuşaklarında 20oC’de (%68,1) olmuş ve ısıtma işlemi uygulanan tohumlarda bu sıcaklıkta çimlendirilmiştir. Yapılan çimlendirme denemelerine göre, yükseltinin artmasıyla çimlenme performansları düşmüştür. Isıtılan tohumlarda çimlenme yüzdeleri, genel olarak alt yükselti kuşağından üst yükselti kuşağına doğru azalmıştır. 150oC’de ısıtılan tüm tohumlarda 1 dakika ısıtma süresinde (%62,9) kontrole (%66,4) yakın çimlenmeler hatta bazı yükselti kuşaklarında kontrolden daha fazla çimlenme elde edilmiştir. 3 dakika ısıtma süresindeki (%33,9) çimlenmelerde önemli oranda düşüşler olmuş ve 5 dakikalık ısıtma süresinde (%3,3) ise az miktarlarda çimlenme gözlenmiştir. 7 dakika ısıtma süresinde, bütün yükselti kuşaklarında tohumlar tamamen canlılığını kaybetmiş ve hiç çimlenme (%0,0) olmamıştır.; In this study, Turkish red pine (Pinus brutia Ten.) seeds were collected from four altitudinal belts (0-400 m, 400-800 m, 800-1200 m and ≥1200 m) on 2 transects in Anamur and Mersin regions. Heating process (1, 3, 5 and 7 minutes) was applied to seedlings and changes in germination characteristics were investigated. In order to determine germination temperatures of seeds, pre-germination tests were done at 15, 20, 25oC and germination percentages of these temperatures were 44.2%, 68.1% and 52.0% respectively. The highest germination rates were observed in both transects on every altitudinal belt at a temperature of 20ºC (68.1%). According to the germination tests, the germination performances were decreased with increasing altitude. Germination ratios of the heated seeds were decreased from lower to higher altitudinal belts. The germination rates of the seeds which were heated at 150oC for 1 minute (62.9%) were close to the control (66.4%). In addition, even higher germinations were obtained at some altitudinal belts. However, germinations at the heating for 3 minutes were considerably decreased (33.9%) and for 5 minutes few germinations occured. Vitality of seeds were lost and no germinations were seen (0.0%) at the heating for 7 minutes.
2013-03-01T00:00:00ZISSR genotyping of Phoenix theophrasti natural populations in Turkey and Crete (Greece) and P. DactyliferaBoydak, MelihTeker, TuğbaGazdağlı, AylinThanos, Costas A.Çalışkan, ServetKaltsis, ApostolisÇalikoğlu Tozlu, EmineFournaraki, ChristiniAlbayrak, Gülruhhttps://hdl.handle.net/11729/32832024-01-25T00:20:50Z2021-10-01T00:00:00ZISSR genotyping of Phoenix theophrasti natural populations in Turkey and Crete (Greece) and P. Dactylifera
Boydak, Melih; Teker, Tuğba; Gazdağlı, Aylin; Thanos, Costas A.; Çalışkan, Servet; Kaltsis, Apostolis; Çalikoğlu Tozlu, Emine; Fournaraki, Christini; Albayrak, Gülruh
Intraspecific and interspecific diversity between Phoenix theophrasti individuals (92 from Turkey and 70 from Crete, Greece) and P. dactylifera specimens (28 from Turkey) were investigated by inter-simple sequence repeat (ISSR) analysis. A total of 45 polymorphic fragments, 360–3454 bps long, were produced. Intraspecific diversity for P. dactylifera was 26.63% and similarities ranged between 0.5 and 1. In the constructed dendrogram, P. dactylifera specimens clustered together in the first main group, outside branches consisting of P. theophrasti samples that generated the second main group. The intraspecific diversity for Turkish P. theophrasti populations was found to be 18.60% and for Cretan populations 13.45%. Antalya–Kumluca–Karaöz samples were grouped outside the branches of the remaining P. theophrasti samples. All three Cretan populations formed their own, separate branch. Datça–Eksera Stream samples together with two Datça–Hurmalıbük specimens constituted a group excluding Datça–Hurmalıbük and Bodrum–Gölköy specimens. Five Bodrum–Gölköy genotypes were clustered separately. Gene flow (Nm) values among populations were estimated from 0.157 to 59.615. AMOVA analysis revealed the percentages of variance among and within Phoenix populations: 73% and 27%, respectively. The first three principal coordinate components accounted for 37.60, 29.32 and 20.04%, respectively, thus the total variance obtained from the first three principal coordinate components was 86.96%. A positive correlation between geographic and genetic distances of populations was detected by Mantel tests (Rx,y = 0.44, p = 0.04). The populations were classified into four clusters by STRUCTURE analysis, supported the PCoA data. To conclude, ISSR results support that P. dactylifera and P. theophrasti are different species. Moreover, the findings not only revealed relationships between natural Phoenix theophrasti populations but also supported the identification of the P. theophrasti individuals that are phenotypically differentiated in the divided Bodrum–Gölköy population (P. theophrasti subsp. golkoyana).
This work was supported by the Scientific Research Projects Coordination Unit of Isik University, Project No. 16A401.
2021-10-01T00:00:00ZA new subspecies of Phoenix theophrasti Greuter (Phoenix theophrasti Greuter subsp. golkoyana Boydak) from TurkeyBoydak, Melihhttps://hdl.handle.net/11729/16942024-03-27T14:45:41Z2019-07-01T00:00:00ZA new subspecies of Phoenix theophrasti Greuter (Phoenix theophrasti Greuter subsp. golkoyana Boydak) from Turkey
Boydak, Melih
In the present study, a new subspecies (Phoenix theophrasti Greuter subsp. golkoyana Boydak) is described in Turkey. The unidentified Phoenix taxon native to Bodrum-Golkoy, Aegean Turkey and named as the "Golkoy Phoenix population" has been known to Golkoy's inhabitants for centuries. The Golkoy Phoenix population was considered to be representative of P. theophrasti. Boydak made the first of a number of trips to Golkoy and immediately noticed some distinct differences between the Golkoy Phoenix population, P. theophrasti Greuter, and Phoenix dactylifera L in the early summer of 1990. He continued his investigations on this taxon for many years to shed light on the subject. He made two new trips to the three native stands of P. theophrasti and the Golkoy Phoenix populations in 2015 and 2018. Measurements and observations were made on the morphological characteristics that showed distinct differences among the Golkoy Phoenix population, P. theophrasti, and P. dactylifera. These were related to the length of male stalks and female inflorescences and some fruit and seed characteristics. The results indicate that some distinctive morphological characteristics of the "Golkoy Phoenix population" merit its being described as a new subspecies. "Phoenix theophrasti Greuter subsp. golkoyana Boydak" differs from P. theophrasti Greuter with respect to its longer fruiting-female stalk length and longer male stalk length, its fruiting stalks hold fruits marginally higher, and its having seeds with slightly visible striate surface crust structures and deeper-wider grooves.; Bu makale kapsamında Türkiye’de yeni bir alttür tanımlanmıştır (Phoenix theophrasti Greuter subsp. golkoyana Boydak). Ege Bölgesi, Bodrum-Gölköy’de doğal olarak bulunan ve “Gölköy Phoenix populasyonu” olarak adlandırılan tanımlanmamış bu takson, Gölköy halkı tarafından yüzlerce yıldan beri bilinmekteydi. Gölköy Phoenix populasyonu Phoenix theophrasti türünün bir temsilcisi olarak kabul ediliyordu. Bu makalenin yazarı, Gölköy’e yaptığı çok sayıdaki bilimsel gezinin, 1990 yılının erken yazında yaptığı ilkinde, Gölköy Phoenix populasyonu, P. theophrasti Greuter and P. dactylifera L. arasında önemli farklılıklar olduğunu gözlemledi. Yazar konuyu aydınlatmak için uzun yıllar bu takson ile ilgili çalışmalara devam etti. 2015 ve 2018 yıllarında, ülkemizde doğal olarak bulunan üç P. theophrsti populasyonu ile Gölköy Phoenix populayonuna iki bilimsel gezi daha yaptı. Gölköy Phoenix populasyonu, P. theophrasti, ve P. dactylifera arasında belirgin farklılıklar gösteren morfolojik özellikler üzerinde ölçmeler ve gözlemler yapıldı. Bunlar erkek çiçek sapları ve meyva saplarının uzunlukları ile bazı meyva ve tohum özelliklerini kapsamaktadır. Sonuçlar, “Gölköy Phoenix populayonu”nun bazı özgün ve farklı morfolojik özellikleri nedeniyle, onun yeni bir alttür olarak tanımlanmaya layık olduğunu ortaya koydu. “Phoenix theophrasti Greuter subsp. golkoyana Boydak”, P. theophrasti Greuter türünden daha uzun meyva sapları ve daha uzun erkek çiçek sapları, meyva saplarının marjinal olarak daha fazla meyva tutmaları, tohumlarının çok az belirli olan tohum kabuğu dokusu, daha derin ve daha geniş tohum oluğu ile ayrılmaktadır.
2019-07-01T00:00:00ZAfforestation of arid and semiarid ecosystems in TurkeyÇalışkan, ServetBoydak, Melihhttps://hdl.handle.net/11729/15692024-03-11T17:58:00Z2017-05-28T00:00:00ZAfforestation of arid and semiarid ecosystems in Turkey
Çalışkan, Servet; Boydak, Melih
Sustainable management of arid and semiarid forests requires careful planning and implementation. Afforestation by planting and seeding is a fundamental tool for the establishment of new forests on barren landscapes and restoration of degraded forests in arid and semiarid ecosystems. In afforestation efforts, the consideration of site preparation, selection of species, seed source, and planting methods pose a number of ecological and economic challenges. Possessing one of the world's richest floras, Turkey suffered from heavy degradation during the last millennia. Some studies suggested that forests and steppes once covered 60%-70% and 10%-15% of the Anatolian landscape, respectively. Growing population, overgrazing, clearance for agriculture, fires, excessive timber harvesting, and misuse of lands led to a 26% reduction in the forest area. The Turkish Forest Service completed 2.3 million ha of afforestation and 1.2 ha of erosion control works, mostly in semiarid landscapes. This article presents an assessment of afforestation activities in the semiarid and arid regions of Turkey and is a review of the efforts exerted during the period 1945 to 2014.
We sincerely thank the Turkish Ministry of Forest and Water Affairs for their support. We are grateful to both the editor and the anonymous reviewers for their valuable comments and suggestions, which improved the paper. We also thank Onur Askin for graphical design
2017-05-28T00:00:00Z