Tamaño de la letra:  Pequeña  Mediana  Grande

Anales del Jardín Botánico de Madrid, Vol 63, No 2 (2006)
doi:10.3989/ajbm.2006.v63.i2.5

Phylogeny and biogeography of the Canarian Solanum vespertilio and S. lidii (Solanaceae)

Gregory J. Anderson, Gabriel Bernardello, Lynn Bohs, Terri Weese, Arnoldo Santos-Guerra

Resumen


Las endémicas y raras especies Solanum vespertilio y S. lidii de las Islas Canarias son notables por ser andromonoicas, autocompatibles, altamente heterándricas (con anteras cortas para recompensa y una muy larga para polinización) y por tener corolas fuertemente zigomórficas. Las flores de Solanum vespertilio son, además, tetrámeras y muestran enantiostilia. Dada su distribución insular, poco común para Solanum, y sus distintivas características reproductivas, su posición filogenética es de interés. Con nuevos datos moleculares de la región trnT-F del ADN del cloroplasto y del gen nuclear de la enzima almidón sintasa unida al gránulo (GBSSI o waxy), confirmamos la hipótesis de que estas dos especies están filogenéticamente asociadas con los linajes geográficamente próximos de Solanum africanos, más que con especies mexicanas previamente sugeridas. La filogenia facilita la comprensión de la evolución del conjunto singular de características reproductivas de estas especies endémicas de islas.


Palabras clave

subgénero Leptostemonum;Solanum vespertilio;Solanum lidii;región trnT-F;gen de la enzima almidón sintasa unida al gránulo;andromonoecia;heterandria;enantiostilia

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