Journal
PLANT AND SOIL
Volume 374, Issue 1-2, Pages 233-250Publisher
SPRINGER
DOI: 10.1007/s11104-013-1857-z
Keywords
AFLPs; Dolomitophily; Foliar analysis; Gypsophyte; Plant nutrition; Soil
Categories
Funding
- Excellence Project Conservacion de la diversidad genetica y floristica de los afloramientos de yeso en Andalucia: el reto del desarrollo sostenible en un archipielago edafico explotado por la mineria
- Consejeria de Economia, Innovacion y Ciencia of the Junta de Andalucia (Proyectos de Excelencia e Infraestructura Cientifica)
- FEDER funds (Andalucia se mueve con Europa)
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Jurinea pinnata is an Iberian vascular plant which only grows on gypsum and dolomite, two types of rocks associated with their exclusive endemic floras. In addition, the plant has an island-like distribution which could affect the differentiation and the genetic variability of wild populations. Thus, the species provides a unique opportunity for comparing (bio)geographical and ecological (edaphic) differentiation by means of molecular markers. For our investigation we took 24 soil samples paired with a similar number of foliar samples for nutritional analyses. Our molecular-marker approach (AFLPs) involved 16 populations. The edaphic parameters revealed significant dissimilarities between dolomitic and gypsum soils. These differences are also found in the mineral composition of the leaves. However, molecular data revealed that the differentiation between populations correlates better with geographical isolation than with the substrate character. The populations showing the greatest genetic diversity are those of the East Baetic territory where the species grow on both substrates and its populations are closer together. The plant tolerance to gypsum and dolomite can be explained either as a result of common adaptive mechanisms or of a more general adaptation to arid environments.
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