Send to

Choose Destination
See comment in PubMed Commons below
J Exp Bot. 2012 May;63(8):3061-70. doi: 10.1093/jxb/ers022. Epub 2012 Feb 29.

The 14-3-3 proteins of Arabidopsis regulate root growth and chloroplast development as components of the photosensory system.

Author information

  • 1Plant Molecular and Cellular Biology Program and Horticultural Sciences Department, Interdisciplinary Center for Biotechnology Research, 1301 Fifield, PO Box 110690, University of Florida, Gainesville, FL 32611, USA.


The 14-3-3 proteins specifically bind a number of client proteins to influence important pathways, including flowering timing via the photosensory system. For instance, 14-3-3 proteins influence the photosensory system through interactions with Constans (CO) protein. 14-3-3 associations with the photosensory system were further studied in this investigation using 14-3-3 T-DNA insertion mutants to study root and chloroplast development. The 14-3-3 μ T-DNA insertion mutant, 14-3-3μ-1, had shorter roots than the wild type and the difference in root length could be influenced by light intensity. The 14-3-3 ν T-DNA insertion mutants also had shorter roots, but only when grown under narrow-bandwidth red light. Five-day-old 14-3-3 T-DNA insertion and co mutants all had increased root greening compared with the wild type, which was influenced by light wavelength and intensity. However, beyond 10 d of growth, 14-3-3μ-1 roots did not increase in greening as much as wild-type roots. This study reveals new developmental roles of 14-3-3 proteins in roots and chloroplasts, probably via association with the photosensory system.

[PubMed - indexed for MEDLINE]
Free PMC Article
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Full text links

    Icon for HighWire Icon for PubMed Central
    Loading ...
    Write to the Help Desk