Abstract
Investigations on differentiation and development of floral parts in Vitis vinifera were conducted in 1967 and 1968 under Ankara conditions. Materials were Hasandede, Kalecik karasi and Papaz karasi varieties, which were grafted on Chasselas X V. berlandieri 41 B M.G. rootstocks. The results obtained can be summarized as follows: The differentiation time of floral parts is different in the three varieties. Not all flowers of one inflorescence have the same stages of development. The differentiation of floral parts initiated with the calyx in cluster primordia. The calyx can be noticed at the beginning of August in Hasandede and Kalecik karasi, at the end of August or the beginning of September in Papaz karasi. The differentiation and development of the sepals (calyx), petals (corolla), stamens and pistil is in the order named. All the essential flower parts were formed within 10-15 days of the appearance of the inflorescence after budburst.
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