TY  - JOUR
A1  - Hübner, Stefanie
A1  - Wissemann, Volker
T1  - Morphometrische Analysen zur Variabilität von Prunus spinosa L. - Populationen(Prunoideae, Rosaceae) im mittleren Saaletal, Thüringen
T1  - Morphometric analysis on the variability of Prunus spinosa L. - populations(Prunoideae, Rosaceae) in the central valley of the river Saale, Thuringia
N2  - Prunus spinosa L. (Rosaceae) is one of the most widespread members of the genus Prunus in middle europe. Its morphological plasticity resulted in a number of described taxa at subspecific level. Since the early neolithic times, drupes of the plum family are recorded and exhibit already a remarkable diversity in size and form. Here we present a short historical account to the use of P. spinosa and an overview of the different taxonomic treatments. We examined distribution patterns in general and in particular in the central valley of the river Saale (Thuringia) with respect to ecological, edaphic and climatic factors. We assessed within 16 populations the variability of 22 metric and 10 qualitative morphological characters at 7 different locations. Population sites included forest-, way- and fieldsides, as well as lightish pine forests. Pollen fertility did not increase during the flowering period, all flowers were directly fully fertile from the beginning. In contrast, glucose content varied significantly depending of the status of fertilization. Epicuticular wax structure was without variation amongst the populations. P. spinosa leaves are covered with a smooth layer of slightly striated wax. Morphological characters were scored on 270 branches and 506 fruits. Most of the characters showed enormous variability among and within populations such as metrics of leaves, thorns and character states of flower morphology. The lowest variability among populations and therefore not dependend of modificatory factors was found in fruit characters. Since kernel morphology seems to be genetically rather than modificatory controlled, we applied the 3 taxonomical concepts of Werneck, Kühn and Scholz u. Scholz to identify evolutionary units at subspecific levels. However, population variability was still so high, that from our study here we can not support an infraspecific classification of Prunus spinosa L.
KW  - Prunus
KW  - Rosengewächse
KW  - Systematik
KW  - Rosaceae
KW  - Prunus
KW  - Evolution
KW  - Morphology
KW  - Systematics
Y1  - 2004
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-35207
ER  - 
TY  - JOUR
A1  - Drenckhahn, Detlev
A1  - Baumgartner, Werner
A1  - Zonneveld, Ben
T1  - Different genome sizes of Western and Eastern Ficaria verna lineages shed light on steps of Ficaria evolution
JF  - Forum Geobotanicum
N2  - The genus Ficaria is now considered to comprize eight Eurasian species. The most widespread European species is the tetraploid F. verna Huds. The present study provides evidence for the existence of two main lineages of F. verna that differ considerably in their genomic size by about 3 pg. A Western F. verna lineage west of river Rhine displays a mean genome size (2C-value) of 34.2 pg and is almost precisely codistributed with the diploid F. ambigua Boreau (20 pg) north of the Mediterranean. The remaining part of Europe appears to be occupied by the Eastern F. verna lineage solely (mean genome size of 31.3 pg) which codistributes in South-Eastern Europe with the diploid F. calthifolia Rchb. (15 pg). There is little overlap at the boundary of Western and Eastern F. verna lineages with the occurrence of a separate intermediate group in the Netherlands (mean genomic size of 33.2 pg) that appears to result from hybridization of both lineages. On the basis of these observations and further considerations we propose development of F. ambigua and F. calthifolia south of the Alps with subsequent divergence to populate their current Western and Eastern European ranges, respectively. The Western F. verna lineage is proposed to originate from autotetraploidization of F. ambigua (precursor) with moderate genomic downsizing and the Eastern F. verna lineage from auto¬tetraploidization of F. calthifolia (precursor).
KW  - Ficaria verna
KW  - Ficaria calthifolia
KW  - Ficaria ambigua
KW  - Durchflusscytometrie
KW  - Evolution
KW  - Genom
Y1  - 2017
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-155061
UR  - http://www.forum-geobotanicum.net/articles/vol_7-2016/drenckhahn-baumgartner-zonnefeld_ficaria_verna/drenckhahn-baumgartner-zonnefeld_ficaria_verna.pdf
SN  - 1867-9315
VL  - 7
ER  -