Plantae | Malpighiales | Salicaceae | Populus | Populus trichocarpa
Bagniewska-Zadworna A, Byczyk J, Eissenstat DM, Oleksyn J, Zadworny M. 2012. Avoiding transport bottlenecks in an expanding root system: Xylem vessel development in fibrous and pioneer roots under field conditions. American Journal of Botany 99: 1417-1426.