Journal
TRENDS IN PLANT SCIENCE
Volume 19, Issue 10, Pages 664-671Publisher
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tplants.2014.06.005
Keywords
small signalling peptide; RALF; cell expansion; alkalinisation; FERONIA
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Funding
- Biotechnology and Biological Science Research Council [BB_BB/H022457/1]
- Marie Curie European Reintegration grant [PERG06-GA-2009-256354]
- School of Biosciences
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Small secreted peptides are gaining importance as signalling molecules in plants. Among the 1000 open reading frames (ORFs) in the Arabidopsis (Arabidopsis thaliana) genome potentially encoding small secreted peptides, the members of the RAPID ALKALINIZATION FACTOR (RALF) family of peptides have been linked to several physiological and developmental processes. Here, we provide a comprehensive overview of current knowledge on the RALF family. Discovered in tobacco (Nicotiana tabacum), the role of RALF peptides has been investigated in numerous plant species. Together, these observations suggest that RALF peptides impact on acidification and cell expansion during growth and development. Although few components of the signalling pathway have been revealed, the recent identification of FERONIA (FER) as a RALF receptor and plasma membrane H+-ATPase 2 as a downstream target provide a major step forward.
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