ArticleAnnals of botany2010
The progamic phase of an early-divergent angiosperm, Annona cherimola (Annonaceae).
Article in Annals of botany, 2010. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 14 papers.
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14 citing papers in PubMed, 43 citations in OpenAlex.
- Development of the embryo and ruminate endosperm in an early-divergent angiosperm, Asimina triloba (Annonaceae).Annals of botany · 2025Article
- Female gametophyte development, pollen‒pistil interactions and embryogenic patterns in chicory (Cichorium intybus): a self-incompatibility perspective.Plant cell reports · 2025Article
- Mechanics of Pollen Tube Elongation: A Perspective.Frontiers in plant science · 2020Review
- Stigmatic exudate in the Annonaceae: Pollinator reward, pollen germination medium or extragynoecial compitum?Journal of integrative plant biology · 2017Article
- Style morphology and pollen tube pathway.Plant reproduction · 2017Review
- Pollen tube access to the ovule is mediated by glycoprotein secretion on the obturator of apple (Malus × domestica, Borkh).Annals of botany · 2017Article
- The Diversity of the Pollen Tube Pathway in Plants: Toward an Increasing Control by the Sporophyte.Frontiers in plant science · 2016Review
- De novo assembly and characterization of transcriptomes of early-stage fruit from two genotypes of Annona squamosa L. with contrast in seed number.BMC genomics · 2015Article
- Pollen performance, cell number, and physiological state in the early-divergent angiosperm Annona cherimola Mill. (Annonaceae) are related to environmental conditions during the final stages of pollen development.Sexual plant reproduction · 2012Article
- The evolution of pollen germination timing in flowering plants: Austrobaileya scandens (Austrobaileyaceae).AoB PLANTS · 2012Article
- Article
- Pollen-pistil interactions and early fruiting in parthenocarpic citrus.Annals of botany · 2011Article
- Female gametophyte development and double fertilization in Balsas teosinte, Zea mays subsp. parviglumis (Poaceae).Sexual plant reproduction · 2011Article
- Seedless fruits and the disruption of a conserved genetic pathway in angiosperm ovule development.Proceedings of the National Academy of Sciences of the United States of America · 2011Article
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3 authors at 2 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsRecent studies of reproductive biology in ancient angiosperm lineages are beginning to shed light on the early evolution of flowering plants, but comparative studies are restricted by fragmented and meagre species representation in these angiosperm clades. In the present study, the progamic phase, from pollination to fertilization, is characterized in Annona cherimola, which is a member of the Annonaceae, the largest extant family among early-divergent angiosperms. Beside interest due to its phylogenetic position, this species is also an ancient crop with a clear niche for expansion in subtropical climates.
methodsThe kinetics of the reproductive process was established following controlled pollinations and sequential fixation. Gynoecium anatomy, pollen tube pathway, embryo sac and early post-fertilization events were characterized histochemically. KEY
resultsA plesiomorphic gynoecium with a semi-open carpel shows a continuous secretory papillar surface along the carpel margins, which run from the stigma down to the obturator in the ovary. The pollen grains germinate in the stigma and compete in the stigma-style interface to reach the narrow secretory area that lines the margins of the semi-open stylar canal and is able to host just one to three pollen tubes. The embryo sac has eight nuclei and is well provisioned with large starch grains that are used during early cellular endosperm development.
conclusionsA plesiomorphic simple gynoecium hosts a simple pollen-pistil interaction, based on a support-control system of pollen tube growth. Support is provided through basipetal secretory activity in the cells that line the pollen tube pathway. Spatial constraints, favouring pollen tube competition, are mediated by a dramatic reduction in the secretory surface available for pollen tube growth at the stigma-style interface. This extramural pollen tube competition contrasts with the intrastylar competition predominant in more recently derived lineages of angiosperms.
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