Journal
FRONTIERS IN PLANT SCIENCE
Volume 6, Issue -, Pages -Publisher
FRONTIERS MEDIA SA
DOI: 10.3389/fpls.2015.01030
Keywords
inflorescence evolution; heterochrony; synorganization; preformation; dioecy; floral reduction; inflorescence architecture; genome-enabled model system
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Funding
- Royal Society International Exchanges Scheme
- Natural Sciences and Engineering Research Council of Canada (NSERC) Discovery Grants Program [RGPIN-2014-05820]
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Poplars (Populus sp.) and willows (Salbc sp.) are well known woody plants common throughout the northern hemisphere, both with fully sequenced genomes. They bear compact unisexual inflorescences known as catkins. Closely related genera of the salicoid clade within the family Salicaceae include the Asian genera Bennettiodendron, Idesia, Itoa, Poliothyrsis, and Carrierea and the Central American genera Olmediella and Macrohasseltia. Like willow and poplar, most of these genera are dioecious, but unlike willow and poplar they generally have loosely branched panicles rather than catkins, and less highly reduced flowers. However, the early developing inflorescences of Carrierea and Idesia show similarities to catkins which suggest possible pathways by which the salicoid catkin may have evolved.
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