Plant Physiol.
HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
QUICK SEARCH:   [advanced]


     

Plant Physiology Preview
Published on October 5, 2007; 10.1104/pp.107.105924

OPEN ACCESS ARTICLE
This Article
Free via Open Access: OA
Right arrow Full Text (Plant Physiology Preview (PDF))
Right arrowOA All Versions of this Article:
145/4/1435    most recent
pp.107.105924v2
pp.107.105924v1
Right arrow Alert me when this article is cited
Right arrow Alert me if a correction is posted
Services
Right arrow Email this article to a friend
Right arrow Similar articles in this journal
Right arrow Similar articles in PubMed
Right arrow Alert me to new issues of the journal
Right arrow Download to citation manager
Right arrow reprints & permissions
Citing Articles
Right arrow Citing Articles via Google Scholar
Google Scholar
Right arrow Articles by M, C.
Right arrow Articles by DJ, H.
Right arrow Search for Related Content
PubMed
Right arrow PubMed Citation
Right arrow Articles by M, C.
Right arrow Articles by DJ, H.
Agricola
Right arrow Articles by M, C.
Right arrow Articles by DJ, H.

Received July 19, 2007
Accepted September 26, 2007

A BELL1-like gene of potato is light-activated and wound-inducible

Chatterjee M , Banerjee AK , and Hannapel DJ *

Department of Horticulture, Iowa State University, Ames, IA 50011-1100

* Corresponding author; email: djh{at}iastate.edu.

BELL1-like transcription factors interact with their protein partners from the Knotted1-family to bind to target genes and regulate numerous developmental and metabolic processes. In potato, the BELL1 transcription factor, StBEL5 and its protein partner POTH1, regulate tuber formation by affecting hormone levels. Over-expression of StBEL5 in transgenic lines produces plants that consistently exhibit enhanced tuber formation and the mRNA of this gene moves through phloem cells in a long-distance signaling pathway regulated by photoperiod. Whereas photoperiod mediates the movement of StBEL5 RNA, activation of transcription of the StBEL5 gene in leaves is regulated by white light, regardless of photoperiod or light intensity. Illumination with either red or blue light induces the StBEL5 promoter, whereas far-red light had no effect. As expected, the StBEL5 promoter harbors numerous conventional light-responsive cis-acting elements like GT1, GATA, and AT1 motifs. Deletion constructs were analyzed to determine what sequences are involved in light activation. Transcriptional activity was also mediated by GA3 treatments in shoots, wounding on stems, insect predation on leaves, and photoperiod in stolons. These results demonstrate that StBEL5 gene activity in the leaf is correlated with wavelengths optimum for photosynthesis. The number of factors that affect the StBEL5 promoter supports the premise that the BELL1-like genes play a role in a wide range of functions.






HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH
ASPB Publications PLANT PHYSIOLOGY THE PLANT CELL
Copyright © 2007 by the American Society of Plant Biologists