NDLI: Citrullus colocynthis NAC transcription factors CcNAC1 and CcNAC2 are involved in light and auxin signaling

Content Provider	Springer Nature Link
Author	Wang, Zhuoyu Rashotte, Aaron M. Dane, Fenny
Copyright Year	2014
Abstract	Two novel NAC transcription factors from C itrullus colocynthis implicated in light and auxin signaling pathway.NAC transcription factors (NAM, ATAF1, 2, CUC2) have multiple functions in plant growth and development. Two NACs, CcNAC1 and CcNAC2, were recently identified in the highly drought-tolerant cucurbit species, Citrullus colocynthis. This study examines the functional role of these genes under different qualities of light based on the in silico analysis of the CcNAC1 and CcNAC2 promoters that revealed the presence of several light-associated motifs. The impact of both light and auxin on CcNAC1 and CcNAC2 expression was examined in C. colocynthis leaves, and using reporter (pCcNAC1, 2::GUS) lines in Arabidopsis. Furthermore, the effects of constitutive overexpression (OE-CcNAC1, 2) in Arabidopsis were also examined under a range of conditions to confirm reporter line linkages. White, blue, red, and far-red light treatments resulted in similar patterns of quantitative changes in CcNAC1and CcNAC2 expression in both species, with the highest transcript increases following red light. Photomorphogenic changes in Arabidopsis hypocotyls were correlated with gene transcript levels. In the absence of light, hypocotyls of OE-CcNAC1/CcNAC2 lines were significantly longer as compared to WT. The addition of exogenous auxin (+IAA) to growth medium also resulted in changes to the hypocotyl lengths of overexpression lines and spatiotemporal reporter line changes in seedlings. Our data suggest that CcNAC1, 2 might be functionally important in the light signaling pathway, and appear connected to the hormone auxin. This is the first study to indicate that NAC genes might play a role in both light and auxin signaling pathways.
Starting Page	1673
Ending Page	1686
Page Count	14
File Format	PDF
ISSN	07217714
Journal	Plant Cell Reports
Volume Number	33
Issue Number	10
e-ISSN	1432203X
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-06-28
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Citrullus colocynthis NAC Transcription factors Promoters Light Auxin CcNAC1 CcNAC2 Cell Biology Plant Sciences Biotechnology Plant Biochemistry
Content Type	Text
Resource Type	Article
Subject	Plant Science Medicine Agronomy and Crop Science

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