Adil GÜNER, Vehbi ESER - optima

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Posters 164 SEED MICROMORPHOLOGY OF THE GENUS OXYTROPIS DC. (FABACEAE) IN TURKEY Seher Karaman ERKUL¹, ZekiAYTAÇ² 1 Aksaray University, Sciences and Letters Faculty, Department of Biology, Aksaray, Turkey seherkaraman@yahoo.com 2 Gazi University, Sciences and Letters Faculty,Department of Biology, Ankara, Turkey, zaytac@gazi.edu.tr In this study, the seed micromorphology of 13 species of Turkish Oxytropis DC. (Fabaceae) was examined using both stereoscopic and scanning electron microscopy (SEM). Seed morphology of the examined specimens exhibits some variation in shape, ornamentation and size. The seed shape is orbicular or reniforme. According to surface ornamentations, 4 main types, striate-reticulate, psilate-reticulate, reticulate and striate-rugulate were defined. Seed size ranges between 1.75-4 mm in length, 1.5-2 mm in width. It is clear that external seed characters, especially ornamentation, could help in the classification of acaulescent Oxytropis species in Turkey. � Keywords: Oxytropis, Fabaceae, seed, micromorphology, SEM KARYOLOGICAL STUDIES ON TANACETUM ALBIPANNOSUM HUB.-MOR. & GRIERSON AND T. AUCHERANUM (DC.) SCHULTZ BIP. FROM TURKEY Sema HAYIRLIO�LU-AYAZ, Hüseyin �NCEER, Halil S. GÜLER, Melahat ÖZCAN Karadeniz Technical University, Faculty of Sciences and Arts, Department of Biology, Trabzon sha@ktu.edu.tr Tanacetum L., which is one of the largest genera in the tribe Anthemideae, is a major ornamental genus, widely used as garden shrubs and also provide a valuable source of insecticidal compounds. It is distributed in temperate zone involving Asia, Europe and North America. In this study, karyotype analyses of Tanacetum albipannosum Hub.-Mor. & Grierson, which is endemic in Turkey, and T. aucheranum (DC.) Schultz Bip. were carried out. Karyological investigations were made from the root tip meristems using squash technique. The taxa have chromosome number 2n = 18. In the karyotype of T. albipannosum, fourteen chromosomes are median centromered, two chromosomes are submedian centromered and two chromosomes are subterminal centromered. Third pair of median centromered chromosomes and second pair of submedian centromered chromosomes have satellites attached to the short arms. In addition, the following types of chromosome were identified in T. aucheranum: Fourteen chromosomes are median and four chromosomes are submedian centromered. Chromosome morphology of the two taxa is new to science. Chromosomal data are compared with previously published results. Keywords: Anthemideae, Chromosome number, Karyotype analysis, Tanacetum, Turkey 100
EDAPHIC INFLUENCE ON THE MORPHOLOGICAL VARIABILITY OF THLASPI ROTUNDIFOLIUM Sergio E. FAVERO-LONGO 1 , Annalisa INGARAMO 1 , Consolata SINISCALCO 1 1 Dipartimento di Biologia Vegetale, University of Torino, Torino, Italy consolata.siniscalco@unito.it High intraspecific variability is a well known feature of Thlaspi rotundifolium (Brassicaceae), which led to recognize variously ranked subspecific taxa, based on morphology and differently related to geographical or geological distribution, till supporting taxonomic uncertainties. We showed that three contiguous populations of T. rotundifolium growing on adjacent debris differing in lithology, i.e. calcschist, metabasite and serpentinite, displayed morphological variability. The style length, repeatedly considered as the main diagnostic trait of the subspecific units, was shorter on calcschist debris with respect to the siliceous substrates and did not follow the overall growth of the plants (biomass, leaf area), but was related with their Mg/Ca content ratio. This research aims to establish if edaphic factors influence the morphological variability of T. rotundifolium s.l., i.e. the style length, by affecting enzymatic processes driving plant growth. In laboratory, different Mg/Ca ratios, mimicking the concentrations in populations grown on the different substrates, affect the activity of glyoxalase I, an enzyme, which is responsible of tolerance of salt, water and heavy metal stress in plants, but also supports cell division processes. Previous works showed that its highest concentration and activity in Brassicaceae is in the pistils. In this work, glyoxalase I activity is quantified in leaves and pistils of T. rotundifolium (15 �kat/mg protein using a standard assay mixture with Mg and no Ca) . Enzymatic assays carried on with the purified, commercial glyoxalase I show that its activity is reduced by a 1:12 Mg/Ca ratio mimicking that of plants growing on calcschists, with respect to the activity recorded with the 1:3-1:4 Mg/Ca ratios of metabasites and serpentinites. These differences in enzyme activity likely support the differences in style length. Edaphic factors seem to influence the intraspecific variability of T. rotundifolium through the activity of the anti-stress protein glyoxalase I. Keywords: Hyperaccumulator - Magnesium/calcium ratio - Serpentine vegetation - Stress tolerance - Style length 165 101 Posters
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OrganizationCommittee: ............
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) Posters: Ahmet AKSOY, Durmu� OK
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H. A�k�n AKPULAT, Ebru ATA�LA
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Stanislav ŠPANIEL, Judita LIHOVÁ,
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March 22, 2010 Monday 09:00 - 10:30
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11:45 - 12:15 AKAN, H. "The Botanic
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Oral Lectures 14 CONSERVATION OF ME
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Oral Lectures METALLOPHYTES, HYPERA
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Oral Lectures 18 STUDY CASES ON CON
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Oral Lectures 20 SYSTEMATICAL STUDI
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Oral Lectures 22 BOTANICAL COLLECTI
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Oral Lectures 24 REVISION OF THE GE
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Oral Lectures 26 PROPOSALS FOR A RE
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Oral Lectures 28 BIOGEOGRAPHICAL LI
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Oral Lectures 30 ETHNOBOTANY IN ANA
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Oral Lectures 32 POLLINATION ECOLOG
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Oral Lectures 34 WHY IS THERE A WOR
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Oral Lectures 36 CHENOPODIACEAE IN
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Oral Lectures 40 ECOSYSTEM FUNCTION
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Oral Lectures 42 MANAGEMENT ADAPTAT
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Oral Lectures 44 GLOBAL CHANGE EFFE
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Oral Lectures 46 HAVE CYTOLOGY AND
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Oral Lectures 48 CHROMOSOME DIVERSI
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Oral Lectures 50 MORPHOLOGICAL AND
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Oral Lectures 52 CLIMATE CHANGE IMP
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Oral Lectures 54 GEOPHYTIC WEEDS IN
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Oral Lectures 56 DENDROARCHAEOLOGY
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Oral Lectures 58 FIELD AND LABORATO
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Oral Lectures 60 SOCIO-ECONOMIC AND
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Oral Lectures 62 SOCIO-ECONOMIC AND
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Oral Lectures 64 LOCALLY EXTINCT PL
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Posters 66 PHENETIC ANALYSIS OF THE
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Posters 68 SOME RARE ENDEMICS OF BE
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Posters GENETIC VARIATION AND PHYLO
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Posters 72 ECOPHYSIOLOGY OF GERMINA
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Posters 74 SOME RARE ENDEMIC WOODY
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Posters 76 TURKEY PLANT BANK Atabay
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Posters 78 SEED CHARACTERISTICS AND
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Posters 80 PLANTS OF CR CATEGORY DI
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Posters 82 GEOPHYTES OF YAZILIKAYA
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Posters 100 PL@NTMEDIT: A COLLABORA
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Adil GÜNER, Vehbi ESER - optima

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