ArticleAnnals of botany2006
Expressed sequence tags (ESTs) and phylogenetic analysis of floral genes from a paleoherb species, Asarum caudigerum.
Article in Annals of botany, 2006. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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4 citing papers in PubMed, 7 citations in OpenAlex.
- The expression and phylogenetic analysis of four AP3-like paralogs in the stamens, carpels, and single-whorl perianth of the paleoherb Asarum caudigerum.Molecular biology reports · 2013Article
- Characterization of the basal angiosperm Aristolochia fimbriata: a potential experimental system for genetic studies.BMC plant biology · 2013Article
- Developmental genetics of the perianthless flowers and bracts of a paleoherb species, Saururus chinensis.PloS one · 2013Article
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10 authors at 3 institutions in 1 country.
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No grant is acknowledged in the PubMed record.
Abstract
BACKGROUND AND
aimsAsarum caudigerum (Aristolochiaceae) is an important species of paleoherb in relation to understanding the origin and evolution of angiosperm flowers, due to its basal position in the angiosperms. The aim of this study was to isolate floral-related genes from A. caudigerum, and to infer evolutionary relationships among florally expression-related genes, to further illustrate the origin and diversification of flowers in angiosperms.
methodsA subtracted floral cDNA library was constructed from floral buds using suppression subtractive hybridization (SSH). The cDNA of floral buds and leaves at the seedling stage were used as a tester and a driver, respectively. To further identify the function of putative MADS-box transcription factors, phylogenetic trees were reconstructed in order to infer evolutionary relationships within the MADS-box gene family. KEY
resultsIn the forward-subtracted floral cDNA library, 1920 clones were randomly sequenced, from which 567 unique expressed sequence tags (ESTs) were obtained. Among them, 127 genes failed to show significant similarity to any published sequences in GenBank and thus are putatively novel genes.
conclusionsPhylogenetic analysis indicated that a total of 29 MADS-box transcription factors were members of the APETALA3(AP3) subfamily, while nine others were putative MADS-box transcription factors that formed a cluster with MADS-box genes isolated from Amborella, the basal-most angiosperm, and those from the gymnosperms. This suggests that the origin of A. caudigerum is intermediate between the angiosperms and gymnosperms.
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