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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Zhu, Ying Stevenson, Dennis W. Langdale, Jane A. Soltis, Douglas E. Pokorny, Lisa Chen, Tao Graham, Sean W. Larsson, Anders Tian, Zhijian Chen, Li Deyholos, Michael K. Der, Joshua P. Burge, Dylan O. Wong, Gane Ka-shu Windham, Michael D. Pryer, Kathleen M. Crandall-stotler, Barbara J. Sun, Xiao Thomas, Philip Carpenter, Eric Mathews, Sarah Pittermann, Jarmila Shaw, A. Jonathan Frangedakis, Eftychios Sigel, Erin M. Wang, Jun Ruhsam, Markus Yan, Zhixiang Villarreal, Juan Carlos Kelly, Steven Rothfels, Carl J. Melkonian, Michael Li, Fay-wei Weststrand, Stina Zhang, Yong |
| Description | Author Affiliation: Li FW ( Department of Biology, Duke University, Durham, NC 27708.); |
| Abstract | Ferns are well known for their shade-dwelling habits. Their ability to thrive under low-light conditions has been linked to the evolution of a novel chimeric photoreceptor--neochrome--that fuses red-sensing phytochrome and blue-sensing phototropin modules into a single gene, thereby optimizing phototropic responses. Despite being implicated in facilitating the diversification of modern ferns, the origin of neochrome has remained a mystery. We present evidence for neochrome in hornworts (a bryophyte lineage) and demonstrate that ferns acquired neochrome from hornworts via horizontal gene transfer (HGT). Fern neochromes are nested within hornwort neochromes in our large-scale phylogenetic reconstructions of phototropin and phytochrome gene families. Divergence date estimates further support the HGT hypothesis, with fern and hornwort neochromes diverging 179 Mya, long after the split between the two plant lineages (at least 400 Mya). By analyzing the draft genome of the hornwort Anthoceros punctatus, we also discovered a previously unidentified phototropin gene that likely represents the ancestral lineage of the neochrome phototropin module. Thus, a neochrome originating in hornworts was transferred horizontally to ferns, where it may have played a significant role in the diversification of modern ferns. |
| ISSN | 00278424 |
| e-ISSN | 10916490 |
| Journal | Proceedings of the National Academy of Sciences of the United States of America |
| Issue Number | 18 |
| Volume Number | 111 |
| Language | English |
| Publisher | National Academy of Sciences |
| Publisher Date | 2014-05-01 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Bryophyta Genetics Ferns Gene Transfer, Horizontal Photoreceptors, Plant Algal Proteins Anthocerotophyta DNA, Plant Evolution, Molecular Genes, Plant Molecular Sequence Data Phototropins Phylogeny Phytochrome Recombinant Fusion Proteins Transcriptome Xanthophylls Research Support, Non-U.S. Gov't Research Support, U.S. Gov't, Non-P.H.S. Multidisciplinary |
| Content Type | Text |
| Resource Type | Article |
| Subject | Multidisciplinary |
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