Asexual Propagation of Shepherdia canadensis and S. rotundifolia

Investigation on sexual and asexual propagation methods of damask rose (rosa damascena mill.)

Demographic effects on fruit set in the dioecious shrub Canada buffaloberry (Shepherdia canadensis)

The effects of pollen limitation on reproductive success in plants have been well-documented using pollen supplementation experiments. However, the role of local demographics in determining pollen limitation, particularly in terms of the additive and interactive effects of pollen availability and competition are not well known. We measured fruit set in the dioecious shrub Canada buffaloberry (S...

Telomerase deficiency in a colonial ascidian after prolonged asexual propagation.

In organisms that propagate by agametic cloning, the parental body is the reproductive unit and fitness increases with clonal size, so that colonial metazoans, despite lack of experimental data, have been considered potentially immortal. Using asexual propagation rate as a measure of somatic performance, and telomerase activity and relative telomere length as molecular markers of senescence, ol...

Asexual propagation in the marine bryozoan Cupuladria exfragminis

Colonies of the free-living bryozoan Cupuladria exfragminis [Herrera-Cubilla, A., Dick, M.H., Sanner, J., Jackson, J.B.C., 2006. Neogene Cupuladriidae of Tropical America. I:. Taxonomy of Recent Cupuladria from opposite sides of the Isthmus of Panama. Journal of Paleontology. 80, 245–263.] from the Gulf of Panama are observed to separate into viable fragments without external force. The process...

Phytophotodermatose à la Mentha rotundifolia

Les phytophotodermatoses sont des éruptions cutanées engendrées par le contact avec une substance végétale et exagérées lors de l'exposition au rayonnement solaire. Elles sont dues à la présence de furocoumarines (psoralènes, xanthotines, bergaptènes) dans la plante et font intervenir deux mécanismes de photosensibilisation cutanée : photo-toxicité ou photo-allergie. Nous rapportons une observa...