Record Details

The regulation of the Z- and G-box containing promoters by light signaling components, SPA1 and MYC2, in Arabidopsis

NIPGR Digital Knowledge Repository (NDKR)

View Archive Info
 
 
Field Value
 
Title The regulation of the Z- and G-box containing promoters by light signaling components, SPA1 and MYC2, in Arabidopsis
 
Creator Gangappa, Sreeramaiah N.
Maurya, Jay P.
Yadav, Vandana
Chattopadhyay, Sudip
 
Subject Arabidopsis
SPA1
MYC2
G-Box
Z-Box
Light Signaling
 
Description Accepted date: March 18, 2013
Although many transcription factors and regulatory proteins have been identified and functionally characterized in light signaling pathways, photoperception to transcription remains largely fragmented. The Z-box is one of the LREs (Light responsive elements) that plays important role in the regulation of transcription during light-controlled Arabidopsis seedling development. The involvement of photoreceptors in the modulation of the activity of the Z-box containing promoters has been demonstrated. However, the role of downstream signaling components such as SPA1 and MYC2/ZBF1, which are functionally interrelated, remains unknown. In this study, we have investigated the regulation of the Z-box containing synthetic and native promoters by SPA1 and MYC2 by using stable transgenic lines. Our studies suggest that SPA1 negatively regulates the expression of CAB1 native promoter. MYC2 negatively regulates the activity of Z- and/or G-box containing synthetic as well as native promoters irrespective of light quality. Moreover, MYC2 negatively regulates the expression of Z/G-NOS101-GUS even in the darkness. Furthermore, analyses of tissue specific expression in adult plants suggest that MYC2 strongly regulates the activity of Z- and G-box containing promoters specifically in leaves and stems. In roots, whereas MYC2 positively regulates the activity of the Z-box containing synthetic promoter, it does not seem to control the activity of the G-box containing promoters. Taken together, these results provide insights into SPA1- and MYC2-mediated transcriptional regulation of the Z- and G-box containing promoters in light signaling pathways.
This work is supported by J. C. Bose National Fellowship Award Grant from Department of Science and Technology, Government of India (http://www.
dst.gov.in/). The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
 
Date 2015-11-03T06:14:49Z
2015-11-03T06:14:49Z
2013
 
Type Article
 
Identifier PLoS One, 8(4): e62194
1932-6203
http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0062194
http://172.16.0.77:8080/jspui/handle/123456789/305
 
Language en_US
 
Publisher PLOS