THE CYTOLOGICAL VARIABILITY OF THE POLLEN GRAIN GERMINATION AT FETEASCĂ NEAGRĂ GRAPE-VINE VARIETY

SILVICA PĂDUREANU

Abstract: The paper presents the algorithm of development process of the male gametophyte at Fetească neagră grape vine variety (Vitis vinifera L.). In the variety-population Fetească neagră 5 biotypes were identified and from the most valuable biotype, 15 clonal elites were selected. In all variants, during several successive years it is noticed the same sequence of the development phases of the male gametophyte. The formation of the vesicle and the division of the generative nucleus in the pollen there are characteristic for the cases under study.
Key words: male gametophyte, generative nucleus, vegetative nucleus, vesicle, pollen tube, nutritive medium, biotype, clonal elite.

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