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Germinated Scots pine pollen grains. Microscopic image taken after 72 h germination. Bar 50 µm. (Photo: © Saila Varis)
Source publication
Rapid change in climate is challenge for the adaptation of forest trees in the future. In wind pollinated tree species pollen mediated long distance gene flow may provide alleles that are (pre)adapted to a future climate. In order to examine the long distance pollen flow in Scots pine (Pinus sylvestris L.), we measured the amount and viability of a...
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Citations
Linum is the main genus of the Flax family widely distributed across the word with about 230 species. In the present study, pollen grains of 15 taxa from four sections of this genus were examined with scanning electron microscope and light microscope. The taxa primarily differed in polar and equatorial shape and their axis length, patterns of exine sculpturing and types of surface fine structure. Pollen shapes in the equatorial and polar view were circular, angular or elliptic. The applied ANOVA test for palynological characters showed a significant difference (p<0.001) of some quantitative characters. Sculpture characters on the basis of their form, size, number, distribution, and fine structure showed variations at different taxonomic levels and were useful in the identification of species, subspecies and varieties in the genus. A significant positive/negative correlation was seen between some characters in the pollen grains. Palynological data, however, cannot show the species relationship in the sections; they are of taxonomic importance and may be used for differentiation of the species, subspecies and varieties.
