Floral scent of joshua trees (Yucca brevifolia sensu lato) : Divergence in scent profiles between species but breakdown of signal integrity in a narrow hybrid zone
PREMISE OF THE STUDY: The role of floral scent in facilitating reproductive isolation between closely related plants remains poorly understood. Yucca brevifolia and Yucca jaegeriana are pollinated by different moth species in allopatry, but in a narrow contact zone, pollinator–host specificity breaks down, resulting in hybridization between species. We explored the chemical basis for reproductive
