Convergence in carnivorous pitcher plants reveals a mechanism for composite trait evolution.

Chomicki, Guillaume; Burin, Gustavo; Busta, Lucas; Gozdzik, Jedrzej; Jetter, Reinhard; Mortimer, Beth; Bauer, Ulrike

Abstract

Composite traits involve multiple components that, only when combined, gain a new synergistic function. Thus, how they evolve remains a puzzle. We combined field experiments, microscopy, chemical analyses, and laser Doppler vibrometry with comparative phylogenetic analyses to show that two carnivorous pitcher plant species independently evolved similar adaptations in three distinct traits to acquire a new, composite trapping mechanism. Comparative analyses suggest that this new trait arose convergently through "spontaneous coincidence" of the required trait combination, rather than directional selection in the component traits. Our results indicate a plausible mechanism for composite trait evolution and highlight the importance of stochastic phenotypic variation as a facilitator of evolutionary novelty.

Citation

Chomicki, G., Burin, G., Busta, L., Gozdzik, J., Jetter, R., Mortimer, B., & Bauer, U. (2024). Convergence in carnivorous pitcher plants reveals a mechanism for composite trait evolution. Science, 383(6678), 108-113. https://doi.org/10.1126/science.ade0529

• Journal Article Type: Article
• Acceptance Date: Nov 7, 2023
• Online Publication Date: Jan 4, 2024
• Publication Date: Jan 4, 2024
• Deposit Date: Apr 11, 2024
• Publicly Available Date: Apr 19, 2024
• Journal: Science
• Print ISSN: 0036-8075
• Electronic ISSN: 1095-9203
• Publisher: American Association for the Advancement of Science
• Peer Reviewed: Peer Reviewed
• Volume: 383
• Issue: 6678
• Pages: 108-113
• DOI: https://doi.org/10.1126/science.ade0529
• Keywords: Phylogeny, Microscopy, Carnivory
• Public URL: https://durham-repository.worktribe.com/output/2151701