SYSTEMATIC IMPLICATIONS OF ACHENE CHARACTERISTICS IN GENERA CENTAUREA L., CYANUS MILL., PSEPHELLUS CASS. AND RHAPONTICOIDES VAILL. (ASTERACEAE)

Bona M.

BANGLADESH JOURNAL OF PLANT TAXONOMY, cilt.22, sa.2, ss.125-136, 2015 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 22 Sayı: 2
  • Basım Tarihi: 2015
  • Doi Numarası: 10.3329/bjpt.v22i2.26074
  • Dergi Adı: BANGLADESH JOURNAL OF PLANT TAXONOMY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.125-136
  • Anahtar Kelimeler: Achene, Asteraceae, Scanning Electron Microscopy, Taxonomy, SPECIES ASTERACEAE, MORPHOLOGY, TURKEY, SEED
  • İstanbul Üniversitesi Adresli: Evet

Özet

This study examines the exomorphic achene characteristics of 23 taxa belonging to Centaurea, Cyanus, Psephellus and Rhaponticoides in Asteraceae using light microscope and scanning electron microscope (SEM). The exomorphic characteristics studied are shape, size, colour and surface pattern of achene, and hair, length and colour of pappus. The results of the present investigation showed that achene size of the studied taxa is 3-7 x 1-4 mm. Pappus length is 1-14 mm, deciduous for three taxa and inner row is differentiated from the outer, 1-3 mm long, for 10 taxa. SEM studies showed eight different types of achene surface patterns for the studied taxa: Glebulate, glebulate-ruminate, reticulate, ribbed, ruminate, smooth, smooth-glebulate and undulate. Achene characteristics are useful for both intrageneric and intraspecific classification of the studied taxa.