期刊
JOURNAL OF EXPERIMENTAL BOTANY
卷 64, 期 17, 页码 5371-5381出版社
OXFORD UNIV PRESS
DOI: 10.1093/jxb/ert331
关键词
Arabidopsis; small signalling peptides; phylogeny; evolutionary analyses; CEP expression; shoot development
资金
- BBSRC David Phillips Fellowship [BB_BB/H022457/1]
- Marie Curie European Reintegration Grant [PERG06-GA-2009-256354]
- Biotechnology and Biological Science Research Council
- Agency for Innovation by Science and Technology
- Special Research Fund of Ghent University
- long-term Federation of European Biochemical Societies fellowship
- Marie Curie long-term FP7 Intra-European Fellowship [IEF-2009-252503]
- Belgian Federal Science Policy Office [IAP VI/33, IUAP P7/29]
- BBSRC [BB/H022457/1] Funding Source: UKRI
- Biotechnology and Biological Sciences Research Council [1094837, BB/H022457/1] Funding Source: researchfish
In Arabidopsis, more than 1000 putative small signalling peptides have been predicted, but very few have been functionally characterized. One class of small post-translationally modified signalling peptides is the C-TERMINALLY ENCODED PEPTIDE (CEP) family, of which one member has been shown to be involved in regulating root architecture. This work applied a bioinformatics approach to identify more members of the CEP family. It identified 10 additional members and revealed that this family only emerged in flowering plants and was absent from extant members of more primitive plants. The data suggest that the CEP proteins form two subgroups according to the CEP domain. This study further provides an overview of specific CEP expression patterns that offers a comprehensive framework to study the role of the CEP signalling peptides in plant development. For example, expression patterns point to a role in above-ground tissues which was corroborated by the analysis of transgenic lines with perturbed CEP levels. These results form the basis for further exploration of the mechanisms underlying this family of peptides and suggest their putative roles in distinct developmental events of higher plants.
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