ArticleAnnals of botany2017
Characterization of CYCLOIDEA-like genes in Proteaceae, a basal eudicot family with multiple shifts in floral symmetry.
Article in Annals of botany, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
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9 citing papers in PubMed, 26 citations in OpenAlex.
- 'Organ'ising Floral Organ Development.Plants (Basel, Switzerland) · 2024Review
- Comprehensive evolutionary analysis of theFrontiers in plant science · 2022Article
- Evolutionary analyses and expression patterns of TCP genes in Ranunculales.Frontiers in plant science · 2022Article
- Genetic control of the lateral petal shape and identity of asymmetric flowers in mungbean (Frontiers in plant science · 2022Article
- Two Cyc2CL transcripts (Cyc2CL-1 and Cyc2CL-2) may play key roles in the petal and stamen development of ray florets in chrysanthemum.BMC plant biology · 2021Article
- The Regulation of CIN-like TCP Transcription Factors.International journal of molecular sciences · 2020Review
- Unraveling the Developmental and Genetic Mechanisms Underpinning Floral Architecture in Proteaceae.Frontiers in plant science · 2019Article
- Generation and classification of transcriptomes in twoPlant diversity · 2018Article
- Genetic Analysis of Floral Symmetry Transition in African Violet Suggests the Involvement of Trans-acting Factor forFrontiers in plant science · 2018Article
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Authors and funding
9 authors at 3 institutions in 2 countries.
Funding
No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsThe basal eudicot family Proteaceae (approx. 1700 species) shows considerable variation in floral symmetry but has received little attention in studies of evolutionary development at the genetic level. A framework for understanding the shifts in floral symmetry in Proteaceae is provided by reconstructing ancestral states on an upated phylogeny of the family, and homologues of CYCLOIDEA (CYC), a key gene for the control of floral symmetry in both monocots and eudicots, are characterized.
methodsPerianth symmetry transitions were reconstructed on a new species-level tree using parsimony and maximum likelihood. CYC-like genes in 35 species (31 genera) of Proteaceae were sequenced and their phylogeny was reconstructed. Shifts in selection pressure following gene duplication were investigated using nested branch-site models of sequence evolution. Expression patterns of CYC homologues were characterized in three species of Grevillea with different types of floral symmetry. KEY
resultsZygomorphy has evolved 10-18 times independently in Proteaceae from actinomorphic ancestors, with at least four reversals to actinomorphy. A single duplication of CYC-like genes occurred prior to the diversification of Proteaceae, with putative loss or divergence of the ProtCYC1 paralogue in more than half of the species sampled. No shifts in selection pressure were detected in the branches subtending the two ProtCYC paralogues. However, the amino acid sequence preceding the TCP domain is strongly divergent in Grevillea ProtCYC1 compared with other species. ProtCYC genes were expressed in developing flowers of both actinomorphic and zygomorphic Grevillea species, with late asymmetric expression in the perianth of the latter.
conclusionProteaceae is a remarkable family in terms of the number of transitions in floral symmetry. Furthermore, although CYC-like genes in Grevillea have unusual sequence characteristics, they display patterns of expression that make them good candidates for playing a role in the establishment of floral symmetry.
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