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Palynological study on the pollen grains of selected Turkish grape (Vitis vinifera L.) cultivars

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The pollen morphology and ultrastructure of selected Turkish indigenous grape cultivars and newly released hybrid varieties were examined by light microscopy and scanning electron microscopy. The pollen differed in some microstructural parameters. | Turk J Agric For 29 (2005) 75-81 © TÜB‹TAK Palynological Study on the Pollen Grains of Selected Turkish Grape (Vitis vinifera L.) Cultivars Birhan MARASALI Department of Horticulture, Faculty of Agriculture, Ankara University, Ankara - TURKEY Münevver PINAR*, Nurhan BÜYÜKKARTAL Deparment of Biology, Faculty of Science, Ankara University, Ankara - TURKEY Received: 29.04.2004 Abstract: The pollen morphology and ultrastructure of selected Turkish indigenous grape cultivars and newly released hybrid varieties were examined by light microscopy and scanning electron microscopy. The pollen differed in some microstructural parameters. The size of the pollen grains ranged from 19.0 x 22.4 µm in Beyaz Çavufl to 24.3 x 21.0 µm in Siyah Gemre. Hönüsü cultivar showed significant variations in the sizes of the polar and equatorial axes. The greatest colpus size was measured in Siyah Gemre (18.4 µm) and the longest pore size was observed in Ata sar›s› (28 µm). The exine thickness of the pollen grains ranged from 0.5 to 1.8 µm in the equatorial axis from and 0.6 to 1.4 µm in the polar axis. Subprolate and prolate-spheroidal shapes were determined in the tricolporate pollen grains and suboblatial and spheroidal shapes in the inaperturate pollen grains. A reticulate ornamentation in the apocolpium regions was a distinctive characteristic in the cultivars examined. Key Words: Pollen, pollen morphology, Vitis vinifera L., grape cultivars Baz› Türk Üzüm Çeflitlerinin (Vitis vinifera L.) Polenleri Üzerinde Palinolojik bir Çal›flma Özet: Türkiye’nin yerli üzüm çeflitleri ve hibritlerinin polen morfolojileri ›fl›k ve taramal› elektron mikroskoplar›nda incelendi. Baz› mikro yap› parametrelerinde polenlerin farkl› oldu¤u görüldü. Polen boyutlar› 19.0 x 22.4 µm (Beyaz Çavufl)’ dan 24.3 x 21.0 µm (Siyah Gemre)’ e kadar de¤iflmektedir. Hönüsü çeflitleri polar ve ekvatoral ölçümler bak›m›ndan büyük varyasyonlar göstermektedir. En büyük kolpus uzunlu¤u Siyah Gemre’ de (18.4 µm) ölçüldü ve .