engleski

Anatomical and morphological analysis of the Dalmatian black pine (Pinus nigra Arnold subsp. dalmatica(Vis.) Franco needles

The anatomical strukture of needles in the Dalmatian black pine (Pinus nigra Arnold subsp. dalmatica (Vis.) Franco) has already been the scope of a detailed analysis, but on the individual level. In this paper, an attempt to perform the anatomical parameter analysis on the population level has been made. The Biokovo, Brač, Pelješac and Hvar populations have been analysed at the same time. The number of resin ducts and the number of stomata on the cross cut in the one-, two- and three-year needles appeared to show a distinctly clinal distribution. In the direction Biokovo-Brač-Pelješac-Hvar the number of resin ducts (7, 6-11, 10-11, 36-12, 65) and the number of stomata (15-20-22-24) increase in a regular way. As this direction coincides with the change of ecological conditions, the climate in the first place, the determined clinal distribution can be indicated as the ecocline. We can take that under the influence of the local microclimate the adequate ecotypes have been developed.

Croatian flora; endems; Pinus nigra subsp.dalmatica; anatomical analysis; population investigations

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