Genetic analysis based on plastidial and ribosomal sequences of the endemic bi-edaphic taxon Jurinea pinnata (Lag.) DC. (Compositae) in the Guadix-Baza Basin

Jurinea pinnata (Lag.) DC. is one of the three species of the genus that grows in the Iberian Peninsula. This species grows on gypsum and dolomite, substrates rich in endemic taxa. Actually, the genus Jurinea Cass. is particularly rich in endemic taxa associated with special substrates. The island-l...

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Bibliographic Details
Published in:Plant biosystems 2015-09, Vol.149 (5), p.922-932
Main Authors: Salmerón-sánchez, E, Pérez-García, F. J, Medina-Cazorla, J. M, Martínez-Nieto, M. I, Martínez-Hernández, F, Garrido-Becerra, J. A, Mendoza-Fernández, A. J, Calvente, M. E. Merlo, Poveda, J. F. Mota
Format: Article
Language:English
Subjects:
basins
case studies
cpDNA
dolomite
dolomitophily
genetic techniques and protocols
genetic variation
gypsophile
gypsophyly
gypsum
hybridization
Jurinea
monophyly
nrDNA
plastid DNA
polyphyly
serpentines
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Summary:Jurinea pinnata (Lag.) DC. is one of the three species of the genus that grows in the Iberian Peninsula. This species grows on gypsum and dolomite, substrates rich in endemic taxa. Actually, the genus Jurinea Cass. is particularly rich in endemic taxa associated with special substrates. The island-like distribution of J. pinnata makes it an interesting case for the study of genetic differentiation processes. The geographical proximity of J. pinnata and J. humilis makes this evolutionary puzzle even more difficult to solve. These facts could affect the genetic attributes of the species as far as diversity and differentiation are concerned. Our field research involved the sampling of individuals from eight populations of J. pinnata. Of them, six were located in the Guadix-Baza Basin. We used sequences of ribosomal and plastid DNA to perform the genetic analyses. Results revealed no differences between individuals occurring on the two kinds of substrates and evidences of hybridization between J. pinnata and J. humilis . Furthermore, the phylogenetic analysis revealed a possible polyphyletic origin for the adaptation to special substrates within the Jurinea genus, while monophyly was observed in species from the Iberian Peninsula. This could indicate a more general adaptation to arid or saline environments.
ISSN:1724-5575
1126-3504
1724-5575
DOI:10.1080/11263504.2014.983203