| Abstrakt: |
The varieties of Vitis vinifera L., no matter of their production direction - generally have normal hermaphrodite flowers. Frequently, however, they present the millerandage phenomenon due to the low capacity of pollen germination as a genetic flaw due to the climatic conditions of blooming phenophase and may also appear at varieties showing incompatibility with their own pollen. In the present study, four table grape varieties were studied, beginning with the morphology and functionality aspects of the flowers, with an interest in the value of the ratio between androecium and gynoecium. The results showed that no matter of the morphological composition of the flower, if this ratio is unitary or almost unitary - with values between 1.1 (Afuz Ali) and 1.17 (Muscat Hamburg), the varieties requires pollinating varieties in the vineyard and it is absolutely necessary to pinch fertile shoots with 2-3 days before the blooming phenophase, to ensure a better development of the inflorescences and floral buttons. Equally, pollinating with foreign pollen, also provides a higher percentage of flowers binding, as well as larger and more compact grapes. [ABSTRACT FROM AUTHOR] |
