Editors' ChoicePlant biology

Emerging from the Shade into the Light

Sci. Signal.  10 Jun 2014:
Vol. 7, Issue 329, pp. ec161
DOI: 10.1126/scisignal.2005573

As a growing seedling emerges into the light, it needs to shift its developmental program to grow toward the light. Signaling components that flip the switch from growth in the shade to growth in the light include phytochromes, which are sensitive to red light, and transcription factors that drive the shade-adapted pattern of development. Ni et al. now show how phosphorylation sets these signaling partners up for destruction. The signaling established by red light invokes photomorphogenesis by promoting the destruction of the photoreceptor and its signaling partner.

W. Ni, S.-L. Xu, J. M. Tepperman, D. J. Stanley, D. A. Maltby, J. D. Gross, A. L. Burlingame, Z.-Y. Wang, P. H. Quail, A mutually assured destruction mechanism attenuates light signaling in Arabidopsis. Science 344, 1160–1164 (2014). [Abstract] [Full Text]