Editors' ChoicePlant biology

A Peptide Finds Its Receptor

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Sci. Signal.  28 Jan 2014:
Vol. 7, Issue 310, pp. ec28
DOI: 10.1126/scisignal.2005111

Because plant cells cannot move around within the plant, developmental changes are orchestrated by changes in cell size and shape. Using quantitative phosphoproteomics, genetics, and chemical analyses, Haruta et al. identified a signaling chain that links a secreted peptide, RALF (rapid alkalinization factor), with its receptor kinase, FERONIA, at the cell surface. FERONIA is involved in reproductive and vegetative development—processes that require the changes in cell size initiated by RALF signaling.

M. Haruta, G. Sabat, K. Stecker, B. B. Minkoff, M. R. Sussman, A peptide hormone and its receptor protein kinase regulate plant cell expansion. Science 343, 408–411 (2014). [Abstract] [Full Text]