Fornoni Juan, Boege Karina, Domínguez César A, Ordano Mariano
Departamento de Ecología Evolutiva; Instituto de Ecología; Universidad Nacional Autónoma de México.
Commun Integr Biol. 2008;1(1):56-8. doi: 10.4161/cib.1.1.6844.
For more than a century the idea that natural selection favors high levels of floral integration has prevailed as a paradigm among floral biologists. However, there is very little empirical evidence of the adaptive value of floral integration. In this addendum we highlight an important result derived from an empirical study complemented with a literature review and mathematical simulations. Results indicated that intrafloral integration but not floral integration was selected among four species of Rosaceae. The literature review coupled with null models revealed that flowering plants have on average lower than expected levels of floral integration. Mathematical simulations further demonstrated that observed levels of floral integration might result from selection favoring increased intrafloral integration. Altogether, these findings suggest that in most flowering plants, floral integration has a low adaptive value and could be a by-product of selection favoring intrafloral integration.
一个多世纪以来，自然选择有利于高度花部整合的观点在花生物学领域作为一种范式盛行。然而，关于花部整合的适应性价值的实证证据非常少。在本附录中，我们强调了一项重要结果，该结果来自一项实证研究，并辅以文献综述和数学模拟。结果表明，在蔷薇科的四个物种中，选择的是花内整合而非花部整合。文献综述结合零模型表明，开花植物的花部整合水平平均低于预期。数学模拟进一步证明，观察到的花部整合水平可能是有利于增加花内整合的选择的结果。总之，这些发现表明，在大多数开花植物中，花部整合的适应性价值较低，可能是有利于花内整合的选择的副产品。
