Pollen morphology of Scorzonera (Asteraceae) in Turkey


Pinar N. M. , ÇOŞKUNÇELEBİ K., Simsek D., OKUR S. , Makbul S. , Acar A.

PHYTOTAXA, cilt.252, sa.4, ss.233-262, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 252 Konu: 4
  • Basım Tarihi: 2016
  • Doi Numarası: 10.11646/phytotaxa.252.4.1
  • Dergi Adı: PHYTOTAXA
  • Sayfa Sayıları: ss.233-262

Özet

The pollen morphology of 45 taxa belonging to 15 sections of the genus Scorzonera distributed in Turkey were studied with light and electron microscopies. The pollen is generally 3-zonocolporate. Pollen grains are oblate-spheroidal with the polar axes 23.2-59.2 mu m and the equatorial axes 27-62.5 mu m. The outline is more or less circular to slightly elliptic in equatorial view and triangular or obtuse-hexagonal in polar view; amb semiangular to intersemiangular. Sculpturing is echinolophate. The spines are commonly concave-conical with a broad basis, sides are straight or slightly convex with a subacute tapered apical portion. Numerical analysis showed that polar axes, equatorial axes and exine thickness are valuable variables for seperating the examined taxa.