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Expression of Arabidopsis FCS-like zinc finger genes is differentially regulated by sugars, cellular energy level, and abiotic stress

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Title Expression of Arabidopsis FCS-like zinc finger genes is differentially regulated by sugars, cellular energy level, and abiotic stress
 
Creator K, Muhammed Jamsheer
Laxmi, Ashverya
 
Subject Arabidopsis
FLZ gene family
sugar signaling
energy signaling
SnRK1
low-energy stress
abiotic stress
HXK1
 
Description Accepted date: 31 August 2015
Cellular energy status is an important regulator of plant growth, development, and stress mitigation. Environmental stresses ultimately lead to energy deficit in the cell which activates the SNF1-RELATED KINASE 1 (SnRK1) signaling cascade which eventually triggering a massive reprogramming of transcription to enable the plant to survive under low-energy conditions. The role of Arabidopsis thaliana FCS-Like Zinc finger (FLZ) gene family in energy and stress signaling is recently come to highlight after their interaction with kinase subunits of SnRK1 were identified. In a detailed expression analysis in different sugars, energy starvation, and replenishment series, we identified that the expression of most of the FLZ genes is differentially modulated by cellular energy level. It was found that FLZ gene family contains genes which are both positively and negatively regulated by energy deficit as well as energy-rich conditions. Genetic and pharmacological studies identified the role of HEXOKINASE 1- dependent and energy signaling pathways in the sugar-induced expression of FLZ genes. Further, these genes were also found to be highly responsive to different stresses as well as abscisic acid. In over-expression of kinase subunit of SnRK1, FLZ genes were found to be differentially regulated in accordance with their response toward energy fluctuation suggesting that these genes may work downstream to the established SnRK1 signaling under low-energy stress. Taken together, the present study provides a conceptual framework for further studies related to SnRK1-FLZ interaction in relation to sugar and energy signaling and stress response
We are grateful to the National Institute of Plant Genome
Research Central Instrument facility (Real Time PCR division)
for their assistance. This work was financially supported by
the National Institute of Plant Genome Research (NIPGR) core
grant and University Grants Commission, Government of India
(research fellowship to MJK). Authors thank Prof. Filip Rolland
for providing seeds of KIN10 OE2.
 
Date 2016-01-06T04:29:15Z
2016-01-06T04:29:15Z
2015
 
Type Article
 
Identifier Front. Plant Sc., 6: 746
1664-462X
http://172.16.0.77:8080/jspui/handle/123456789/518
http://journal.frontiersin.org/article/10.3389/fpls.2015.00746/abstract
10.3389/fpls.2015.00746
 
Language en_US
 
Publisher Frontiers Media S.A.