Chromosome number, karyotype and pollen morphology of the rare endemic Centaurea goeksunensis


Goemuergen A. N. , Dogan C., Oezmen E., Aytac Z.

NORDIC JOURNAL OF BOTANY, cilt.27, ss.120-124, 2009 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 27 Konu: 2
  • Basım Tarihi: 2009
  • Doi Numarası: 10.1111/j.1756-1051.2008.00278.x
  • Dergi Adı: NORDIC JOURNAL OF BOTANY
  • Sayfa Sayıları: ss.120-124

Özet

In this paper, chromosome number, karyotype and pollen morphology of Centaurea goeksunensis Aytac & H. Duman, described in 2005, are studied for the first time. Centaurea goeksunensis is found to be tetraploid (2n=4x=60). This is the second record of polyploidy in Centaurea sect. Psephelloideae (Boiss.) Sons. The basic chromosome number of C. goeksunensis was found to be x=15 and the haploid karyotype formula is 18 m+10 sm+2 st. The pollen grains of C. goeksunensis were found to be radially symmetric, isopolar and tricolporate. They are intersemiangular in polar view and prolate-sphaeroidal in equatorial view. The exine is thickened at the poles.