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Variation in sex expression in Polish and Ukrainian populations of Taxus baccata L.

100%

Iszkulo G. , Jasinska A. K.

tom 52

29-32

The aim of the present study was to analyse the occurrence of monoecious individuals in selected populations of Taxus baccata in Poland and Ukraine. The investigation showed the monoecy in Taxus baccata to be extremely rare phenomenon. Only four cosexual individuals were found in three by seven populations examines and the frequency of monoecy was 0.13% on average among 2986 trees verified. Isolated seeds were found on individuals with large number of male flowers. Only one tree was found with numerous macro- and microstrobiles.

Anomalous needle numbers of Pinus mugo Turra in the Tatra Mts.

100%

Boratynska K. , Jasinska A. K.

nr 2

Morphological differentiation of leaves in the relict tree Zelkova carpinifolia (Ulmaceae)

61%

Jasinska A. K. , Rucinska B. , Kozlowski G. , Betrisey S. , Safarov H. , Boratynska K. , Boratynski A.

tom 74

Zelkova carpinifolia is a relict tree occurring in refugial zones of south-western Eurasia. The main aim of the study was the biometrical comparison of the leaf characteristics of the species sampled in three regions of Transcaucasia. We aimed to test the hypotheses that (1) leaves from vegetative (L) shoots would be larger and more variable than those from fertile (S) shoots, (2) the leaves from the same shoot type express geographic patterns of morphological differentiation, similar to pattern described for genetic markers and (3) to verify the systematic position of Z. hyrcana and Z. carpinifolia subsp. yomraensis. The plant material was collected from 5 populations of Z. carpinifolia, one of Z. hyrcana and one of Z. carpinifolia subsp. yomraensis. The total 1482 leaves, 713 from L- and 769 S-type were measured using 26 characters. Our results show very high level of differences between leaves from the L- and S-type of shoots. The majority of leaf characters did not reveal dependence neither on geographic latitude, longitude and altitude nor on the basic climatic data. The results of multivariate analyses of S leaves revealed three group of populations, namely from (1) Colchis, (2) eastern Caucasus (3) Talysh. Thus, our biometric analyses revealed similar pattern to the haplotypic differentiation of Z. carpinifolia detected using chloroplast markers described in the literature. We did not detected significant differences in the leaf characters between supposed Z. hyrcana and/or Z. carpinifolia subsp. yomraensis, when compared to Z. carpinifolia, thus not confirming their separate taxonomic status.

Taxonomic relationships and population differentiation of the south-western Eurasian Zelkova species inferred in leaf morphology

51%

Jasinska A. K. , Rucinska B. , Kozlowski G. , Fazan L. , Garfi G. , Pasta S. , Bétrisey S. , Gerber E. , Boratynska K. , Boratynski A.

2021

tom 85

Jak wilgotność powietrza wpływa na drzewa?

36%

Jasinska A. K.

nr 12