MORPHOLOGICAL DIVERSITY OF LEAVES HAIRS IN TILIA L. (TILIACEAE) FROM UKRAINIAN FLORA
Journal Title: Naukovyi visnyk Chernivetskoho universytetu. Biolohiia (Biolohichni systemy) - Year 2017, Vol 9, Issue 1
Abstract
The trichomes on the leaf surface of fertile shoots of 15 Tilia L. species (21 infraspecific taxa from Anastraea Engl. and Astrophilyra Engl. sections, native or introduced in Ukrainian flora) have been described. Covering (simple and stellate) and glandular trichomes have been found. Type of trychomes and their localization (adaxial or abaxial surface, along veins or on interveinal surface, in the corners of the large viens, etc.) and morphological features (single hairs, fascicles of 2-3 and more hairs, star-shaped with 2-18 armed) have been found as important features for taxonomy of Anastraea and Astrophilyra sections on inter- and infraspecific levels. The density of pubescence slightly varies according to environmental conditions and can be changed during the growing season. Leaf pubescence peculiarities are in full accordance to the division of investigated taxa on Astrophilyra and Anastraea sections. It has been shown that stellate hairs (from single to numerous hairs) occur on leaves of all Tilia species as well as phylogenetically related family Malvaceae.
Authors and Affiliations
O. M. ЦАРЕНКО, T. Б. ВАКУЛЕНКО, Н. І. КАРПЕНКО
Keywords
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