Peters E. M., Martorell C., Ezcurra E., The adaptive value of cued seed dispersal in desert plants: Seed retention and release in Mammillaria pectinifera (Cactaceae), a small globose cactus, American Journal of Botany, 2009, 96(2):537-541, doi: 10.3732/ajb.0800157
The study of serotiny in Mammillaria pectinifera combines two-year observations of a population near Texcala with a greenhouse watering experiment. The authors determine seed content in fruits of different ages, seed germination, release of new fruits and seedling establishment after the dry season. The paper explains the interaction of gradual seed dispersal and expulsion of entire fruits in a wet year.