Abstracts, XIV OPTIMA Meeting, Palermo (Italy) , 9-15

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XIV OPTIMA Meeting, Palermo (Italy), 9-15 September 2013 Diversity of Flora of the Pshavi, Tusheti and Khevsureti (SE and NE part of the Greater Caucasus) SHETEKAURI S. Department of Biology, Ivane Javakishvili Tbilisi State University, Tbilisi, Georgia. E-mail: shetekauri@yahoo.com This abstract presents the results of systematic, chorological and ecopathological studies of the diversity of the Flora of Pshavi, Tusheti and Khevsureti (SE and NE Part of Greater Caucasus). It is based on field investigation and on literature research. The following vegetation belts are distinguished there: mountain-1000 (1200)- 1700 (1800) m, subalpine – 1800 (1900)-2400 (2500) m, alpine – 2500 (2600)-2800 (2900) m, subnival – 2900 (3000)-3800 (4000) m, nival – above 3800 (4000) m. On the north-facing slopes (Pirikiti Khevsureti and Tusheti) pine and birch forests (Pinus sosnowskyi, Betula raddeana, B. litwinowii) are particularly important and south-facing slopes (Piraketi Khevsureti and Pshavi)- oack, hornbeam and beech forests (Quercus iberica, Carpinus betulus, Fagus orientalis). 1203 Vascular Plants species, 434 genera and 103 families were recorded in the montane, subalpine, alpine and subnival belt of the Tush-Pshav Khevsureti within a range of 1000(1200)- 3500(4000) m a.s.l. Among these 236 species or 19,6% are common endemics of the Greater Caucasus and Caucasus. An interesting regularity is observed concerning lithophilous flora occurring at different elevations. Particularly, the percentage of the endemic species increases with increasing elevation. In the region the floristically most interesting part are the Tusheti and N Khevsureti (north part of the east Caucasus). The leading families are Asteraceae (170 species), Poaceae (79 species), Scrophulariaceae (65 species) Caryophyllaceae, Fabaceae (each 63 species), Brassicaceae (62 species), Rosaceae (61 species), Apiaceae, Cyperaceae (each 52 species), Lamiaceae (50), Boraginaceae (34), Polygonaceae (22 species), Geraniaceae, Primulaceae (each 17 species). The leading genera are Carex (39 species), Veronica (18 species), Campanula (15 species), Rosa (14 species), Cerastium, Scrophularia (each 12 species), Primula, Saxifraga, (each 11 species), Verbascum (10 species), Pedicularis, Potentilla, Minuartia (each 9 species). The flora is into 9 chorological types (PALEARKT., OLARKT, CAUC- AS. MIN, CAUC- AS. ANTER, CAUC, EUCAUC, EUROP, MEDIT, PANCONT.) and more 33 subtypes. The chorological spectrum shows the dominance of Caucasus-Minor Asian, Palearctic, Caucasus-Anterior Asian, Holarctic, Caucasian and Eucaucasian elements. Species composition and coenotic role are different in various parts of SE and NE of the Greater Caucasus and within each part. This is conditioned by the different hypsometry of various parts of the study area, the character of glaciations, edaphic and climatic conditions, lithological diversity. 147
XIV OPTIMA Meeting, Palermo (Italy), 9-15 September 2013 Pollen quantitative parameters of Ramonda nathaliae and Haberlea rhodopensis (Gesneriaceae) SOUNAPOGLOU A., PANAJOTIDIS S., ELEFTHERIADOU E., THEODOROPOULOS K. Aristotle Univ. of Thessaloniki, Fac. of Forestry and Natural Environment, Lab. of Forest Botany-Geobotany, Thessaloniki, Greece. E-mail: and_also_spinelli@hotmail.com, pansamp@for.auth.gr, eelefthe@for.auth.gr, ktheodor@for.auth.gr In this study, pollen quantitative variables of Haberlea rhodopensis and Ramonda nathaliae were measured and statistically analysed. The following seven populations from northern Greece were sampled for their pollen grains: 2 populations of Haberlea rhodopensis from the valley of Nestos river (HabNes1, HabNes2), two populations of Haberlea rhodopensis from Rhodopi Mountains (HAbRh1, HAbRh2), two populations of Ramonda nathaliae from Tzena mountain (RamTz1, RamTz2) and one population of the latter species, from Paiko mount. The pollen grains were studied with the Light Microscope (LM) after they have been acetolysed first. The variables that have been subjected to One –Way Analysis of Variance (ANOVA), using SPSS 20, were: Polar Axis (P), Equatorial Axis (E), distance between two colpi at the equatorial area (ColEDis), distance between two colpi at the polar area (ColPDis), shape (P/E), apocolpium index. The results have shown that the two populations of Haberlea rhodopensis from Rhodopi mountain were the most differentiated among themselves and the rest of the populations. Generally, the species Ramonda nathaliae was more cohesive than the one of Haberlea rhodopensis with regard to the pollen variables that were analysed here. As far as the shape is concerned, the pollen grains were in general spherical- spheroid (Shape (P/E)≈ 1), except for HabRh2 which had mostly sub-ovoid pollen grains (Shape≈ 1,2). Furthermore, the two species, which belong to the subfamily of Cyrtandroidae, have pollen sizes (size = Polar axis length < 25μm) which are in agreement with previously published data for this subfamily. 148
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Abstracts, XIV OPTIMA Meeting, Palermo (Italy) , 9-15

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