Functional characterization of phytochrome interacting factor 3 in phytochrorne-mediated light signal transduction

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Phytochromes regulate various light responses through their interactions with different signaling proteins, such as phytochrome interacting factor 3 (PIF3). However, the physiological functions of PIF3 in light signaling are not yet fully understood. To increase our understanding of these roles, we characterized a T-DNA insertional pif3 mutant and transgenic plants overexpressing the full-length PIF3. Transgenic overexpressing lines displayed longer hypocotyls and smaller cotyledons under red light and reduced cotyledon opening under both red and far-red light, whereas the pif3 mutant showed the opposite phenotypes. The accumulation of anthocyanin and chlorophyll further indicated complicated features of PIF3 function. The accumulation of anthocyanin was increased and the content of chlorophyll was decreased in the overexpression lines. Our data indicate that PIF3 plays complex roles depending on the type of light response and the light conditions.
Publisher
AMER SOC PLANT BIOLOGISTS
Issue Date
2003-10
Language
English
Article Type
Article
Citation

PLANT CELL, v.15, no.10, pp.2399 - 2407

ISSN
1040-4651
DOI
10.1105/tpc.014498
URI
http://hdl.handle.net/10203/83097
Appears in Collection
BS-Journal Papers(저널논문)
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