Los cactus evolucionan rápidamente a través de cambios en la forma de sus flores, según un estudio

Una nueva investigación revela que los cactus se encuentran entre los grupos de plantas que evolucionan más rápido en la Tierra, impulsados por cambios rápidos en la forma de la flor más que en su tamaño o en sus polinizadores. Los hallazgos de la Universidad de Reading desafían ideas sobre la especiación que se remontaban a la época de Darwin. Los científicos analizaron datos de más de 750 especies para llegar a sus conclusiones.

Investigadores de la Universidad de Reading examinaron datos sobre la longitud de las flores en cientos de especies de cactus. Descubrieron tamaños que oscilaban entre los 2 milímetros y los 37 centímetros, pero esta variación tuvo poco impacto en la tasa de formación de nuevas especies. En cambio, la velocidad a la que las flores cambiaban de forma surgió como el factor clave de la diversificación, tanto en periodos evolutivos recientes como antiguos.

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