Testing taxonomic and biogeographical relationships in a narrow mediterranean endemic complex (Hippocrepis balearica) using RAPD markers.

Rosselló JA, Cebrián MC, Mayol M (2002) Testing taxonomic and biogeographical relationships in a narrow mediterranean endemic complex (Hippocrepis balearica) using RAPD markers. Annals of Botany 89:321-327.

Seed germination and reproductive features of Lysimachia minoricensis (Primulaceae), a wild-extinct plant.

Rosselló JA, Mayol M (2002) Seed germination and reproductive features of Lysimachia minoricensis (Primulaceae), a wild-extinct plant. Annals of Botany 89:559-562.

Effects of regional climate and small-scale habitat quality on performance in the relict species Ramonda myconi.

Riba M, Picó FX, Mayol M (2002) Effects of regional climate and small-scale habitat quality on performance in the relict species Ramonda myconi. Journal of Vegetation Science 13:259-268.

Testing taxonomic and biogeographical relationships in a narrow Mediterranean endemic complex (Hippocrepis balearica) using RAPD markers

Rosselló J.A., Cebrián M.C., Mayol M. (2002) Testing taxonomic and biogeographical relationships in a narrow Mediterranean endemic complex (Hippocrepis balearica) using RAPD markers. Annals of Botany. 89: 321-327.
Enllaç
Doi: 10.1093/aob/mcf044

Resum:

Analyses of RAPD profiles from 17 populations of the Hippacrepis balearica complex revealed a highly structured geographic pattern, not only among continental-insular areas but also within the eastern Balearic islands. In marked contrast to previous morphometric results, a clear separation between continental and insular samples was found, and intermediates between H. balearica and H. valentina samples were not detected. Molecular data indicated that western and eastern Balearic populations of the complex (H. grosii and H. balearica) were more closely related to each other than to continental populations (H. valentina). Multivariate analyses of the RAPD data clearly indicated that the similarities between continental and eastern Balearic samples of the H. balearica complex recovered by morphometric methods are due either to parallel evolution or to retention of plesiomorphic features. © 2002 Annals of Botany Company.

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Seed germination and reproductive features of Lysimachia minoricensis (Primulaceae), a wild-extinct plant

Rosselló J.A., Mayol M. (2002) Seed germination and reproductive features of Lysimachia minoricensis (Primulaceae), a wild-extinct plant. Annals of Botany. 89: 559-562.
Enllaç
Doi: 10.1093/aob/mcf083

Resum:

Lysimachia minoricensis is one of the few Mediterranean endemic plants (Minorca, Balearic islands) that has gone extinct in the wild but which persists as extant germplasm or cultivated plants in several botanical gardens. Reproductive features (seed set, number of seeds per capsule, seed weight) and germination responses to constant temperatures, sea water and dry-heat pre-treatments were investigated to determine the extent to which they may have influenced the extinction of the species. Seed set in Lysimachia is not dependent on pollinators, suggesting a functional selfer breeding system. Most plants produced a large mean number of fruits (23.2) and seeds (46.6), and the mean production of seeds per individual was estimated to be almost 1100. Overall, no highly specific requirements were observed for seed germination. Seed germination was not inhibited in the dark, and a high germinability (over 87 % in all cases) was recorded in most experiments, with the exception of those performed at low temperatures (5 and 10°C). These data suggest that fertility and seed viability were not the major causes of extinction. The high reproductive performance of L. minoricensis is in striking contrast to its status as a wild-extinct plant, suggesting that extrinsic factors were responsible for its extinction. © 2002 Annals of Botany Company.

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