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- Title
Morphological, palynological, seed-coat surface and karyological studies of Hesperis bicuspidata and H. stellata (Cruciferae) from Turkey.
- Authors
Duran, Ahmet; Ünal, Fatma; Pinar, Nur Münevver; Çetin, Özlem
- Abstract
The taxonomic delimitation of Hesperis bicuspidata (Willd.) Poir. and H. stellata F. Dvořák is problematic, and we therefore studied morphological, palynological, seed-coat surface and karyological features of both species to determine their degree of similarity. The morphology was described using 13 characters, each based on ten measurements on different specimens. Hesperis stellata and H. bicuspidata both show large variation in vegetative and reproductive organs; petal length varies between 18 and 26 mm and petal width is 3-7 mm; the corolla is lilac, whitish lilac, violet, dark violet or white in color, and fruits of both species are generally glabrous or have very short bifurcate hairs. Pollen and seed morphology were examined by LM and SEM. Pollen of both species is prolate-spheroid or subprolate, tricolpate and reticulate. Their exine structures are the same. Hesperis bicuspidata is diploid (2n=14) but different chromosome types were present in the two studied specimens. Hesperis stellata is tetraploid (2n=28) showing the same chromosome types as the samples of H. bicuspidata. Eighteen morphometrical characters of H. bicuspidata, H. stellata, H. pisidica and H. armena were analysed by ANOVA. Notes on ecology and distribution are also presented for H. bicuspidata. Based on the results, H. stellata is reduced to a synonym of H. bicuspidata.
- Subjects
HESPERIS; SEED research; EXINE; PALYNOLOGY; ANALYSIS of variance
- Publication
Nordic Journal of Botany, 2012, Vol 29, Issue 6, p641
- ISSN
0107-055X
- Publication type
Article
- DOI
10.1111/j.1756-1051.2011.00997.x