» Articles » PMID: 8219070

Circadian and Light-regulated Expression of Nitrate Reductase in Arabidopsis

Overview
Journal Plant Mol Biol
Date 1993 Oct 1
PMID 8219070
Citations 36
Authors
Affiliations
Soon will be listed here.
Abstract

The expression of a number of plant genes is regulated by an endogenous circadian clock. We report that the Arabidopsis NIA2 (nitrate reductase) gene shows robust circadian oscillations in mRNA accumulation which persist for at least 5 days in plants that have been grown in a light-dark (LD) cycle and then transformed to continuous light (LL). We further show that NIA2 mRNA accumulation oscillates in a circadian fashion in plants that have been grown in LD and then transferred to continuous darkness (DD). Results from nuclear run-on transcriptional analysis suggest that the oscillations in steady-state levels of NIA2 mRNA abundance are not primarily due to changes in transcription but, instead, reflect post-transcriptional regulation. The circadian oscillations in NIA2 mRNA abundance are paralleled by circadian oscillations in nitrate reductase enzyme activity (NR activity) in Arabidopsis plants that have been grown in LD and then transferred either to DD or to LL. Etiolated Arabidopsis seedlings express neither NIA2 mRNA nor NR activity. However, both NIA2 mRNA accumulation and NR activity are induced by exposure to white light. The inductive effects of light on NIA2 mRNA accumulation are due, at least in part, to a very low fluence phytochrome-mediated response. However, the persistence of circadian oscillations in NIA2 mRNA abundance for at least 5 days in LL demonstrates that the circadian clock is capable of overriding or gating the inductive effects of light on NIA2 mRNA accumulation in Arabidopsis for an extended, continuous period of time.

Citing Articles

Inhibition of RNA degradation integrates the metabolic signals induced by osmotic stress into the Arabidopsis circadian system.

Prasetyaningrum P, Litthauer S, Vegliani F, Battle M, Wood M, Liu X J Exp Bot. 2023; 74(18):5805-5819.

PMID: 37453132 PMC: 10540740. DOI: 10.1093/jxb/erad274.


Expression of novel nitrate reductase genes in the harmful alga, Chattonella subsalsa.

Wang Y, Bouchard J, Coyne K Sci Rep. 2018; 8(1):13417.

PMID: 30194416 PMC: 6128913. DOI: 10.1038/s41598-018-31735-5.


Circadian rhythms and post-transcriptional regulation in higher plants.

Romanowski A, Yanovsky M Front Plant Sci. 2015; 6:437.

PMID: 26124767 PMC: 4464108. DOI: 10.3389/fpls.2015.00437.


Quantitative Circadian Phosphoproteomic Analysis of Arabidopsis Reveals Extensive Clock Control of Key Components in Physiological, Metabolic, and Signaling Pathways.

Choudhary M, Nomura Y, Wang L, Nakagami H, Somers D Mol Cell Proteomics. 2015; 14(8):2243-60.

PMID: 26091701 PMC: 4528250. DOI: 10.1074/mcp.M114.047183.


RNA around the clock - regulation at the RNA level in biological timing.

Nolte C, Staiger D Front Plant Sci. 2015; 6:311.

PMID: 25999975 PMC: 4419606. DOI: 10.3389/fpls.2015.00311.


References
1.
Giuliano G, Hoffman N, Ko K, Scolnik P, Cashmore A . A light-entrained circadian clock controls transcription of several plant genes. EMBO J. 1988; 7(12):3635-42. PMC: 454935. DOI: 10.1002/j.1460-2075.1988.tb03244.x. View

2.
Shah D, Hightower R, Meagher R . Complete nucleotide sequence of a soybean actin gene. Proc Natl Acad Sci U S A. 1982; 79(4):1022-6. PMC: 345891. DOI: 10.1073/pnas.79.4.1022. View

3.
Labrie S, Wilkinson J, Crawford N . Effect of Chlorate Treatment on Nitrate Reductase and Nitrite Reductase Gene Expression in Arabidopsis thaliana. Plant Physiol. 1991; 97(3):873-9. PMC: 1081098. DOI: 10.1104/pp.97.3.873. View

4.
Leutwiler L, Meyerowitz E, Tobin E . Structure and expression of three light-harvesting chlorophyll a/b-binding protein genes in Arabidopsis thaliana. Nucleic Acids Res. 1986; 14(10):4051-64. PMC: 339845. DOI: 10.1093/nar/14.10.4051. View

5.
Caspar T, Quail P . Promoter and leader regions involved in the expression of the Arabidopsis ferredoxin A gene. Plant J. 1993; 3(1):161-74. DOI: 10.1046/j.1365-313x.1993.t01-8-00999.x. View