ArticleAmerican journal of botany2025
Trait specialization facilitates autonomous selfing ability in a mixed-mating plant.
Article in American journal of botany, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 2 papers.
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Who cites it
2 citing papers in PubMed.
- Nitrogen enrichment reduces parasitism in an annual hemiparasite.American journal of botany · 2025Article
- Trait specialization facilitates autonomous selfing ability in a mixed-mating plant.American journal of botany · 2025Article
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Authors and funding
5 authors.
Funding
No grant is acknowledged in the PubMed record.
Abstract
premiseTransitions from outcrossing to selfing often drive the evolution of floral traits in a predictable way. However, these expectations are not as straightforward for mixed-mating systems. In this study, we examine variation in pollen-collecting hairs, a floral structure involved in secondary pollen presentation within Campanulaceae. While secondary pollen presentation is hypothesized to have evolved to promote outcrossing, we evaluate the association of pollen-collecting hairs with selfing ability.
methodsWe characterized pollen-collecting hair morphology and retraction phenology in 15 populations of Campanula americana with known variation in self-fertilization ability using time-series collections and automated image analysis of pollen-collecting hair length.
resultsThere was two-fold variation in the length of pollen-collecting hairs across populations that was associated with a population's within-flower selfing ability. Retraction rate of pollen-collecting hairs also varied among populations and was associated with selfing ability. Populations with greater selfing ability had longer hairs that retracted quickly early in floral anthesis.
conclusionsWe show pollen-collecting hairs, a trait thought to have evolved to promote outcrossing, is associated with within-flower selfing ability. Through developmental changes in length, pollen-collecting hairs appear to be a plastic phenotype that is both associated with autonomous selfing and with outcrossing in C. americana. This provides support for trait specialization rather than trade-offs, and for the 'best of both worlds' hypothesis of mixed mating-system evolution.
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