Pollen morphology of Scorzonera (Asteraceae) in Turkey


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

PHYTOTAXA, vol.252, no.4, pp.233-262, 2016 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 252 Issue: 4
  • Publication Date: 2016
  • Doi Number: 10.11646/phytotaxa.252.4.1
  • Title of Journal : PHYTOTAXA
  • Page Numbers: pp.233-262
  • Keywords: Asteraceae, Pollen, Scorzonera, Turkey, L. ASTERACEAE, COMPOSITAE-ASTERACEAE, NORTHEAST ANATOLIA, NOV ASTERACEAE, TAXA, CICHORIEAE, S.L., SYSTEMATICS, LACTUCEAE, POSITION

Abstract

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.