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- Title
New insights into the pollen morphology of the genus Mutisia (Asteraceae, Mutisieae).
- Authors
Tellería, M. C.; Katinas, L.
- Abstract
The pollen morphology from 67 collections representing 52 species of Mutisia was analyzed by means of light, scanning electron and transmission electron microscopy. Pollen of Mutisia is comparable to that of the more widespread type found in Mutisiinae. The pollen grains of the genus are characterized by the spheroidal-subprolate to prolate shape, large size, tricolporate aperture, with mesoaperture, exine Mutisia type, with sculpturing microechinate to rugulate or microechinate-rugulate. This basic pollen type is very variable in size, endoaperture shape, and exine thickness of the pollen grains. A new type of arrangement of columellae was observed in pollen of Mutisia section Mutisia (e.g., M. stuebelli, M. microphylla, and M. sodiroi). It is suggested that it might have harmomegathic significance. The pollen morphology and polymorphism are discussed with regard to functional mechanisms and possible evolutionary significance.
- Subjects
POLLEN; MORPHOLOGY; MUTISIA; SCANNING electron microscopy; TRANSMISSION electron microscopy; PLANT spores
- Publication
Plant Systematics & Evolution, 2009, Vol 280, Issue 3/4, p229
- ISSN
0378-2697
- Publication type
Article
- DOI
10.1007/s00606-009-0185-5