Asma Kış Gözlerinde Tomurcuk Büyüklüğü ile Düşük Sıcaklık Ekzotermi Arasındaki İlişki

Yıl 2020, Cilt: 51 Sayı: 3, 243 - 248, 25.09.2020

Muhammed Küpe , Cafer Köse

https://doi.org/10.17097/ataunizfd.678624

Cited By: 3

Öz

Bu çalışma asma kış gözlerinde tomurcuk büyüklüğü ile düşük sıcaklık ekzotermi oluşumu arasındaki ilişkiyi ortaya koymak amacıyla yapılmıştır. Bu amaçla tomurcuk yapıları ve büyüklükleri bakımından farklı olduğu bilinen Karaerik (Vitis vinifera L.) and 53 Pazar 01 (Vitis labrusca) genotiplerinin primer ve sekonder tomurcukları ayrı ayrı incelenmiştir. 2016-2017 ve 2017-2018 kış dinlenme döneminde yürütülen çalışmada, tomurcukların donma noktasını belirlemek için kullanılan düşük sıcaklık ekzotermleri diferansiyel termal analiz (DTA) yöntemi ile belirlenmiştir. Asma kış gözlerinde dormant tomurcukların büyüklükleri, histolojik işlemlerden sonra alınan kesitlerin mikroskobik olarak incelenmesi ile belirlenmiştir. Yapılan DTA testi ile farklı histolojik yapıya sahip tomurcukların farklı sayıda ve karakterde ekzoterm meydana getirdikleri görülmüştür. Çalışmada Vitis vinifera L. türüne ait örneklerin Vitis labrusca türüne ait örneklere kıyasla daha düşük sıcaklıklarda ekzoterm oluşturdukları tespit edilmiştir. Yapılan histolojik tespitlerde her iki genotipin primer tomurcuklarının sekonder tomurcuklarından yapısal olarak daha büyük olduğu görülmüştür. Çalışmada 0.010 mm2’den daha küçük alana sahip tomurcukların ekzoterm meydana getirmediği tespit edilmiştir. Çalışmanın sonucunda asma kış gözlerinin ekzoterm oluşturması üzerine tomurcuk yapısı ve büyüklüğünün etkili olduğu belirlenmiştir.

Anahtar Kelimeler

Tomurcuk yapısı, Don toleransı, Düşük sıcaklık ekzotermleri, Asma

The Relationship Between Bud Size and Exotherm Formation in Dormant Buds of Grapevine

Öz

This study was conducted to determine the relationship between bud size and low temperature exotherm (LTE) formation in dormant period of grapevines. For this purpose, primary and secondary buds of Karaerik (Vitis vinifera L.) and 53 Pazar 01 (Vitis labrusca) genotypes which are known to have differences between the bud structure and size, were examined separately. In the study carried out in 2016-2017 and 2017-2018 dormant periods, low temperature exotherms were determined by Differential Thermal Analysis (DTA) method in order to determine the freezing point of the buds. Dormant buds of grapevine size were determined by microscopic imaging of the sections taken after histological procedures. It was demonstrated by the DTA test that the buds with different histological structures had different character and number of LTE. In this study, it was determined that bud samples belonging to Vitis vinifera L. form exotherm at lower temperatures than bud samples belonging to Vitis labrusca species. For both genotypes, it was determined by the histological determinations that the primary buds had a larger structure than the secondary buds. In the study, it was found that the buds with an area less than 0.010 mm2 did not produce LTE. As a result of the study, it was found that the bud structure and size were effective on LTE formation of grapevine dormant buds.

Anahtar Kelimeler

Bud structure, Cold tolerance, Low temperature exotherms, Grapevine

Kaynakça

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