Interpreting the ontogenetic delay of shoot development in Mediterranean pines: adaptive trait or phylogenetic constraint?

Climent, José M.; Chambel, Maria Regina; González-Martínez, Santiago C.; Grivet, Delphine (2011) - Interpreting the ontogenetic delay of shoot development in Mediterranean pines: adaptive trait or phylogenetic constraint?

Juvenile developmental rates are relevant life history traits in plants. Pines show an especially marked vegetative (heteroblastic) phase change during early developmental stages, shifting from a shoot with primary needles and free growth to a shoot with secondary needles and cyclic preformed growth. In previous works we have confirmed - within the subgenus Pinus - a marked divergence in heteroblastic phase change between Mediterranean (Subsect. Pinaster) and Eurasian pines (Subsect. Pinus) that share neighbouring habitats along the Mediterranean Basin. A high genetic variation between populations and high additive variance within populations has been shown in Maritime pine (Pinus pinaster). These facts, together with a significant relationship between the heteroblastic stage of the plants and their field survivorship in some species, as well as marked morpho-physiological differences between primary and secondary needles suggest a relevant adaptive value of the timing of heteroblastic change, at least in some Mediterranean pines

Más información

SCI: 

NO

Tipo de Publicación: 

Congresos

Congreso: 

Medpine 4: 4th International Conference on Mediterranean Pines

Lugar de Celebración: 

Avignon, Francia

Tipo de Contribución a Congreso: 

Comunicación Oral