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Pollen morphology and systematical contribution of some Onosma (Boraginaceae) taxa distribution in Turkey

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Abstract

In this study, the palynological characteristics and its taxonomic implications of 30 different Onosma L. taxa, which belong to sections Protonosma M. Popov., Podonosma (Boiss.) Gurke. and subsections Haplotricha (Boiss.) Gurke., and Asterotricha (Boiss.) Gurke. of section Onosma were investigated under Light Microscope (LM), Scanning Electron Microscope (SEM) and pollen of four taxa with Transmission Electron Microscope (TEM). Pollen grains are mostly heteropolar and trisyncolporate rarely isopolar and tricolporate (O. rostellata and O. orientale), subprolate or prolate to spheroidal and exine tectate-perforate (O. rostellata, O. sericea and O. auriculata) and tectate-imperforate (O. bracteosa). In the conclusion of the study it has been determined that investigated Onosma species have shown three different types of ornamentation, namely scabrate (O. sericea type, O. auriculata type and O. orientale type), rugulate (O. rostellata type) and scabrate–rugulate (O. bracteosa type). It was pointed out that these different types of ornamentation can be used to separate the sections and similar taxa from each other. Pollen grains of O. lycaonica Hub.-Mor., O. bracteosa Hausskn. & Bornm., O. caerulescens Boiss. and O. taurica Willd. var. taurica from subsection Asterotricha have an operculum.

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Acknowledgments

We wish to thank the Scientific and Technological Research Council of Turkey (TUBİTAK, TBAG-211T133) for financial assistance. I also thank to Kürşat AY and İlknur DAĞ from SEM and TEM laboratory of Osmangazi University (ESOGUSTEM) and Prof. Dr. Ş. Necat YILMAZ from Histology and Embryology Department of Mersin University for help with the SEM and TEM studies.

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Authors and Affiliations

  1. Department of Biology, Faculty of Science and Arts, Mersin University, 33343, Mersin, Turkey

    Rıza Binzet

  2. Department of Biology, Faculty of Science and Arts, Osmangazi University, Eskisehir, Turkey

    İsmühan Potoğlu Erkara

  3. Department of Biology, Faculty of Science and Arts, Sinop University, Sinop, Turkey

    Hülya Özler

  4. Department of Biology, Faculty of Science, Gazi University, Ankara, Turkey

    Sevil Pehlivan

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  1. Rıza Binzet
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  2. İsmühan Potoğlu Erkara
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  4. Sevil Pehlivan
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Correspondence to Rıza Binzet.

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Binzet, R., Potoğlu Erkara, İ., Özler, H. et al. Pollen morphology and systematical contribution of some Onosma (Boraginaceae) taxa distribution in Turkey. Plant Syst Evol 300, 2135–2146 (2014). https://doi.org/10.1007/s00606-014-1030-z

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