The pollen morphology of 45 specimens of 29 species of the genus Astragalus L. of the section Onobrychoidei DC. distributed in Turkey was studied with light and electron microscopies. The pollen is generally 3-colporate. Pollen of the section is prolate, subprolate, and prolate-spheroidal. Size varies, with the polar axis ranging from to μm and the equatorial axis from to μm. | Research Article Turk J Bot 33 (2009) 291-303 © TÜBİTAK doi: Pollen morphology of Astragalus L. sect. Onobrychoidei DC. (Fabaceae) in Turkey Nur M. PINAR1,*, Murat EKİCİ2, Zeki AYTAÇ2, Hasan AKAN3, Talip ÇETER4, Şenol ALAN5 1 Ankara University, Faculty of Science, Department of Biology, Ankara - TURKEY 2Gazi University, Faculty of Science and Arts, Department of Biology, Ankara - TURKEY 3Harran University, Faculty of 4Kastamonu University, Faculty of Science and Arts, Department of Biology, Urfa - TURKEY Science and Arts, Department of Biology, Kastamonu - TURKEY 5Zonguldak Karaelmas University, Faculty of Science and Arts, Department of Biology, Zonguldak - TURKEY Received: Accepted: Abstract: The pollen morphology of 45 specimens of 29 species of the genus Astragalus L. of the section Onobrychoidei DC. distributed in Turkey was studied with light and electron microscopies. The pollen is generally 3-colporate. Pollen of the section is prolate, subprolate, and prolate-spheroidal. Size varies, with the polar axis ranging from to μm and the equatorial axis from to μm. The outline is elliptic or compressed oval in the meridional section, versus trilobulate and sometimes tetralobulate in the polar optical section. Sculpturing is usually microreticulate, rarely reticulate or rugulate in the meridional optical section, and psilate and perforate (with irregular or circular perforations) in the polar optical section. Key words: Turkey, Fabaceae, Astragalus, Onobrychoidei, pollen morphology Türkiye’deki Astragalus L. cinsi Onobrychoidei DC. (Fabaceae) seksiyonunun polen morfolojisi Özet: Türkiye’de yayılış gösteren Astragalus L. cinsinin Onobrychoidei DC. seksiyonunda yer alan 29 türe ait 45 örneğin polen morfolojisi ışık ve elektron mikroskobuyla çalışılmıştır. Polenler genellikle trikolporat aperture sahip, prolat, subprolat veya prolat-sferiodaldir. Polenlerin polar eksenleri 23,4-42,6 μm ve ekvatoral
