Editors' ChoicePlant biology

No Light Control

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Sci. Signal.  29 Apr 2014:
Vol. 7, Issue 323, pp. ec117
DOI: 10.1126/scisignal.2005419

Light is the main source of energy for plants and is also used as a signal for growth and development: Indeed, it can modulate up to a fifth of the entire transcriptome in both Arabidopsis thaliana and rice. Petrillo et al. show that light can affect gene expression through alternative splicing of the serine-arginine rich protein At-RS31, required for proper plant growth. But photoreceptors are not involved; rather, a mobile retrograde signal from the chloroplast controls the alternative splicing of At-RS31.

E. Petrillo, M. A. Godoy Herz, A. Fuchs, D. Reifer, J. Fuller, M. J. Yanovsky, C. Simpson, J. W. S. Brown, A. Barta, M. Kalyna, A. R. Kornblihtt, A chloroplast retrograde signal regulates nuclear alternative splicing. Science 344, 427–430 (2014). [Abstract] [Full Text]