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- Title
Centaureinae (Asteraceae) in the Mediterranean – history of ecogeographical radiation.
- Authors
Hellwig, F. H.
- Abstract
The ecogeographical history of Cardueae-Centaureinae (Asteraceae) in the Mediterranean is discussed on the background of the geological history of the region. Two main phases of radiation are postulated. The first one separated the basal groups of the subtribe (Klasea group, Rhaponticoides/Cheirolophus group, Rhaponticum group, Amberboa group, Psephellus, and Plectocephalus). This happened during late Oligocene and Miocene. The major modern or derived clades (Centaurea, Colymbada group, Cyanus and Carthamus/Carduncellus group) may have differentiated around the transition from Pliocene to Pleistocene. Aridisation favoured the development of biennial and annual species independently in different groups. Different modes of evolution are observed in annual and perennial species, reflected by morphology as well as DNA sequences. The myrmekochory syndrome, adaptation to man-made habitats, chromosome and genome evolution, and modes of reproduction receive special attention.
- Subjects
RHAPONTICUM; GENETICS; NUCLEIC acids; NUCLEOTIDE sequence; CELL nuclei; SEX (Biology)
- Publication
Plant Systematics & Evolution, 2004, Vol 246, Issue 3/4, p137
- ISSN
0378-2697
- Publication type
Article
- DOI
10.1007/s00606-004-0150-2