Martínez-Peralta C., Márquez-Guzmán J., Mandujano M. C., How common is self-incompatibility across species of the herkogamous genus Ariocarpus?, American Journal of Botany, 2014, 101(3):530-538, doi: 10.3732/ajb.1400022
Controlled pollination of seven Ariocarpus species was combined with fluorescence observations of 562 pistils. Pollen tubes were recorded in five zones from stigma to ovary, while fruit set and seed production were assessed on separate flowers. Self-pollen most often stopped in the style, with differing degrees of further growth and fruit set among species. The location of inhibition supports partial gametophytic self-incompatibility.