ArticleProceedings of the National Academy of Sciences of the United States of America2011
Female gamete competition in an ancient angiosperm lineage.
Article in Proceedings of the National Academy of Sciences of the United States of America, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 10 papers.
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10 citing papers in PubMed, 30 citations in OpenAlex.
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- Model Species to Investigate the Origin of Flowers.Methods in molecular biology (Clifton, N.J.) · 2023Article
- Epigenetic Regulation of Megaspore Mother Cell Formation.Frontiers in plant science · 2021Review
- Temporal Distinction between Male and Female Floral Organ Development inPlants (Basel, Switzerland) · 2020Article
- Article
- The Diversity of the Pollen Tube Pathway in Plants: Toward an Increasing Control by the Sporophyte.Frontiers in plant science · 2016Review
- Natural variation in epigenetic pathways affects the specification of female gamete precursors in Arabidopsis.The Plant cell · 2015Article
- Floral biology and ovule and seed ontogeny of Nymphaea thermarum, a water lily at the brink of extinction with potential as a model system for basal angiosperms.Annals of botany · 2015Article
- The classical arabinogalactan protein AGP18 mediates megaspore selection in Arabidopsis.The Plant cell · 2013Article
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Authors and funding
2 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
In Trimenia moorei, an extant member of the ancient angiosperm clade Austrobaileyales, we found a remarkable pattern of female gametophyte (egg-producing structure) development that strikingly resembles that of pollen tubes and their intrasexual competition within the maternal pollen tube transmitting tissues of most flowers. In contrast with most other flowering plants, in Trimenia, multiple female gametophytes are initiated at the base (chalazal end) of each ovule. Female gametophytes grow from their tips and compete over hundreds of micrometers to reach the apex of the nucellus and the site of fertilization. Here, the successful female gametophyte will mate with a pollen tube to produce an embryo and an endosperm. Moreover, the central tissue within the ovules of Trimenia, through which the embryo sacs grow, contains starch and other carbohydrates similar to the pollen tube transmitting tissues in the styles of most flowers. The pattern of female gametophyte development found in Trimenia is rare but by no means unique in angiosperms. Importantly, it seems that multiple female gametophytes are occasionally or frequently initiated in members of other ancient angiosperm lineages. The intensification of pollen tube (male gametophyte) competition and enhanced maternal selection among competing pollen tubes are considered to have been major contributors to the rise of angiosperms. Based on insights from Trimenia, we posit that prefertilization female gametophyte (egg) competition within individual ovules in addition to male gametophyte (sperm) competition and maternal mate choice may have been key features of the earliest angiosperms.
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