ibclogo XVI International Botanical Congess


Abstract Number: 3827
Poster No. = 2230


MINOR VEINS STRUCTURE AND CARBOHYD-RATE TRANSPORT IN LEAF TISSUES OF DICOTS


Y.V. Gamalei, M.V. Pakhomova, A. Sjutkina, V. Batas, Komarov Botanical Institute, 197376, St-Petersburg, Russia


Comparative research of leaf minor veins and paraveinal tissues by LM and TEM have led to the creation of the data base for 2200 species representing the most taxa of dicots. Divergent typology of the minor veins essentially covering all the structural variety includes 4 basic types symplastic primitive (1A) and advanced (1B), and apoplastic primitive (2A) and advanced (2B). Taxono-specificity of these types is 100, 99, 84, 51 and 30% on the level of species, genus, families, orders and subclasses. Low level of cell differentiation and specialization in accompany with low intensity of intercellular exchange is shown for both primitive types. Advanced types are contrast differed by vein formation, cell structure and specialization, the intensity of exchanges is much higher in both.


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