The 14-3-3 proteins of Arabidopsis regulate root growth and chloroplast development as components of the photosensory system.
J Exp Bot
; 63(8): 3061-70, 2012 May.
Article
in En
| MEDLINE
| ID: mdl-22378945
ABSTRACT
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.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Chloroplasts
/
Arabidopsis
/
Plant Roots
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14-3-3 Proteins
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Light Signal Transduction
Language:
En
Journal:
J Exp Bot
Journal subject:
BOTANICA
Year:
2012
Type:
Article
Affiliation country:
United States