Pollen morphology of some endemic Turkish Centaurea L. (Asteraceae, section Phaloletis) and their taxonomic value

POTOĞLU ERKARA İ., KÖSE Y. B., Osoydan K., YÜCEL E.

PLANT SYSTEMATICS AND EVOLUTION, vol.298, no.6, pp.1111-1117, 2012 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 298 Issue: 6
  • Publication Date: 2012
  • Doi Number: 10.1007/s00606-012-0623-7
  • Journal Name: PLANT SYSTEMATICS AND EVOLUTION
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.1111-1117
  • Keywords: Centaurea, Endemic, Pollen morphology, LM and SEM, Turkey, PRIMITIVE ANGIOSPERMS, TURKEY, CHROMOSOME, EVOLUTION
  • Anadolu University Affiliated: Yes

Abstract

In this study, the detailed pollen morphological structures of some endemic Turkish species of Centaurea amaena Boiss., C. antalyense H. Duman & A. Duran, C. aphrodisea Boiss., C. hierapolitana Boiss., C. luschaniana Heimerl, C. lycia Boiss., C. tossiensis Freyn. Et Sint., and C. wagenitzii Hub.-Mor. (Asteraceae, section Phaloletis) were studied under light microscopy (LM) and scanning electron microscopy (SEM) for the first time. LM and SEM investigations showed that the pollen grains of eight taxa are more or less spheroidal-subprolate, the amb triangular and tricolporate. The exine sculpture is tectate, microechinate-scabrate in the pollen of Centaurea taxa. Spinules are less dense in Centaurea amaena, C. antalyense, C. hierapolitana, and C. lycia, but they are more dense in C. aphrodisea, C. luschaniana, C. tossiensis, and C. wagenitzii. Spinule dimensions are different from each other. The exine has one layer of columellae beneath the spines. We determined all taxa that have the Helianthoid type. Exine sctructure and sculpture as well as spine density and dimensions in Asteraceae are the most reliable characteristics for discriminating taxa.