Sympatric diploid and hexaploid cytotypes of Senecio carniolicus (Asteraceae) in the Eastern Alps are separated along an altitudinal gradient
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- 作者：Peter Sch?nswetter ; Margarita Lachmayer ; Christian Lettner ; David Prehsler ; Stefanie Rechnitzer ; Dieter S. Reich ; Michaela Sonnleitner ; Iris Wagner ; Karl Hülber and Gerald M. Schneeweiss ; et al.
- 关键词：Autopolyploidy ; Contact zones ; Cytotype mixture ; Eastern Alps ; Flow cytometry
- 刊名：Journal of Plant Research
- 出版年：2007
- 出版时间：November, 2007
- 年：2007
- 卷：120
- 期：6
- 页码：721-725
- 全文大小：212.7 KB
- 刊物类别：Biomedical and Life Sciences
- 刊物主题：Life Sciences
Plant Sciences
Plant Ecology
Plant Physiology
Plant Biochemistry - 出版者：Springer Japan
- ISSN：1618-0860
文摘
We explored the fine-scale distribution of cytotypes of the mountain plant Senecio carniolicus along an altitudinal transect in the Eastern Alps. Cytotypes showed a statistically significant altitudinal segregation with diploids exclusively found in the upper part of the transect, whereas diploids and hexaploids co-occurred in the lower range. Analysis of accompanying plant assemblages revealed significant differences between cytotypes along the entire transect but not within the lower part only, where both cytotypes co-occur. This suggests the presence of ecological differentiation between cytotypes with the diploid possessing the broader ecological niche. No tetraploids were detected, indicating the presence of strong crossing barriers.