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    Airborne pollen grains in Savastepe (Balikesir)
    (Ekoloji, 2008) Bilisik, Aycan; Akyalcin, Hanife; Bicakci, Adem
    In this study, pollen concentrations were monitored in the atmosphere of Savastepe (Balikesir) during 2002 by using gravimetric method. 28 taxa and unidentified pollen grains were recorded. From these taxa, 17 of them belong to arboreal plants (AP), 11 to non arboreal plants (NAP). A total of 4750 pollen grains/cm2 counted in the sampling, of these 4163 pollen/cm 2 pertain to arboreal plants (87.64%), 542 pollen/cm2 to non arboreal plants (11.41%) and 45 pollen/cm2 (0.95%) to unidentified. Dominating taxa were: Pinus spp. (58.20%), Cupressaceae/Taxaceae (21.33%), Gramineae (8.19%), Quercus spp. (1.59%), Olea spp. (1.31%), Fraxinus spp. (1.26%) and Abies spp. (1.06%). During the study period, the pollen concentration reached its highest level in April.
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    Identification of airborne pollen grains in Savastepe (Balikesir)
    (Foundation Environmental Protection & Research-Fepr, 2008) Bilisik, Aycan; Akyalcin, Hanife; Bicakci, Adem
    In this study, pollen concentrations were monitored in the atmosphere of Savastepe (Balikesir) during 2002 by using gravimetric method. 28 taxa and unidentified pollen grains were recorded. From these taxa, 17 of them belong to arboreal plants (AP), 11 to non arboreal plants (NAP). A total of 4750 pollen grains/cm(2) counted in the sampling, of these 4163 pollen/cm(2) pertain to arboreal plants (87.64%), 542 pollen/cm(2) to non arboreal plants (11.41%) and 45 pollen/cm(2) (0.95%) to unidentified. Dominating taxa were: Pinus spp. (58.20%), Cupressaceae/Taxaceae (21.33%), Gramineae (8.19%), Quercus spp. (1.59%), Olea spp. (1.31%), Fraxinus spp. (1.26%) and Abies spp. (1.06%). During the study period, the pollen concentration reached its highest level in April.
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    Öğe
    Pollen morphology of six Achillea L. sect. Achillea (Asteraceae) species in Turkey
    (Tubitak Scientific & Technological Research Council Turkey, 2011) Akyalcin, Hanife; Arabaci, Turan; Yildiz, Bayram
    The pollen morphology of 48 specimens of 6 species (9 taxa) of the genus Achillea L. sect. Achillea (Asteraceae), A. nobilis L. subsp. neilreichii (A.Kern.) Formanek, A. nobilis subsp. densissima (O.Schwarz ex Bassler) Hub.-Mor., A. nobilis subsp. sipylea (O.Schwarz) Bassler, A. nobilis subsp. kurdica Hub.-Mor., A. filipendulina Lam., A. clypeolata Sm., A. coarctata Poir., A. biebersteinii Afan., and A. cappadocica Hausskn. & Bornm. distributed in Turkey were investigated using light (LM) and scanning electron microscopy (SEM). The pollen grains were oblate-spheroidal, prolate-spheroidal, subprolate and generally tricolporate, though at times tetracolporate or even pentacolporate. The size of the grains varied, ranging from 17.6 to 57.5 mu m on the polar axis mean and from 19.7 to 55.2 mu m on the equatorial axis mean. Their outline is oval, compressed oval, or circular in the meridional optical section and trilobulate or sometimes tetralobullate in the polar optical section. The structure of the exine is double tectate and mean exine thickness varied from 3 to 8.5 mu m. The pollen ornamentations are echinate in LM and echinate-microperforate and echinate-rugulate-microperforate in SEM. In conclusion, the species examined showed substantial variation in pollen characteristics, at both the interspecific and intraspecific levels.
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    Pollen morphology of some Achillea L. sect. Babounya (DC.) O. Hoffm. (Asteraceae) species from Turkey
    (Soc Botanique France, 2014) Akyalcin, Hanife; Arabaci, Turan; Yildiz, Bayram
    The pollen morphology and exine structure of 52 specimens of the 14 species (15 taxa) of the genus Achillea L. section Babounya (DC.) O. Hoffm. (Asteraceae) distributed in Turkey were examined with light and scanning electron (SEM) microscopes. The pollen characteristics of 13 species (except for Achillea tenuifolia Lam.) are newly reported here. The pollen grains were oblate-spheroidal, prolate-spheroidal, subprolate and generally tricolporate, but sometimes tetracolporate, and even pentacolporate. The size of grains varied, ranged from 21.20 to 45 mu m on the polar axis mean, and from 18.10 to 43.14 mu m on the equatorial axis mean. The structure of the exine was doubletectate (Anthemoid pattern) and mean of exine thickness varied from 3.61 to 8.16 mu m. The sculpture was echinate both in light and SEM micrographs. Moreover, rugulate, microperforate and rugulate-microperforate ornamentations were observed in SEM. The results indicate that the examined species showed heterogeneity in pollen characteristics, both at an interspecies level and between specimens of a species collected from different localities. In addition, correlation between pollen size and chromosome number was discussed.