ArticleThe New phytologist2022
Developmental evidence for parental conflict in driving Mimulus species barriers.
Article in The New phytologist, 2022. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 11 papers.
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Who cites it
11 citing papers in PubMed.
- Introgression and parental conflict shape repeated occurrences of postzygotic isolation in Mimulus.Current biology : CB · 2026Article
- Limited directional selection but coevolutionary signals among imprinted genes inbioRxiv : the preprint server for biology · 2026Article
- Introgression and Parental Conflict Shape Repeated Occurrences of Postzygotic Isolation.bioRxiv : the preprint server for biology · 2025Article
- United by conflict: Convergent signatures of parental conflict in angiosperms and placental mammals.The Journal of heredity · 2024Review
- Parental dialectic: Epigenetic conversations in endosperm.Current opinion in plant biology · 2024Review
- Article
- Molecular basis and evolutionary drivers of endosperm-based hybridization barriers.Plant physiology · 2024Review
- Genetic Cause of Hybrid Lethality Observed in Reciprocal Interspecific Crosses betweenInternational journal of molecular sciences · 2024Article
- The role of conflict in shaping plant biodiversity.The New phytologist · 2023Review
- Mechanisms of Intrinsic Postzygotic Isolation: From Traditional Genic and Chromosomal Views to Genomic and Epigenetic Perspectives.Cold Spring Harbor perspectives in biology · 2023Review
- Strong postmating reproductive isolation in Mimulus section Eunanus.Journal of evolutionary biology · 2023Article
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Authors and funding
2 authors.
Funding
Abstract
The endosperm, a tissue that nourishes the embryo in the seeds of flowering plants, is often disrupted in inviable hybrid seeds of closely related species. A key question is whether parental conflict is a major driver of this common form of reproductive isolation. Here, we performed reciprocal crosses between pairs of three monkeyflower species (Mimulus caespitosa, Mimulus tilingii, and Mimulus guttatus). The severity of hybrid seed inviability varies among these crosses, which we inferred to be due to species divergence in effective ploidy. By performing a time series experiment of seed development, we discovered parent-of-origin phenotypes that provide strong evidence for parental conflict in shaping endosperm evolution. We found that the chalazal haustorium, a tissue within the endosperm that is found at the maternal-filial boundary, shows pronounced differences between reciprocal hybrid seeds formed from Mimulus species that differ in effective ploidy. These parent-of-origin effects suggest that the chalazal haustorium might act as a mediator of parental conflict, potentially by controlling sucrose movement from the maternal parent into the endosperm. Our study suggests that parental conflict in the endosperm may function as a driver of speciation by targeting regions and developmental stages critical for resource allocation and thus proper seed development.
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