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PMID: 2535546 Published · ppublish English Journal Article Research Support, U.S. Gov't, Non-P.H.S.

Transcriptional regulation by a circadian rhythm.

The Plant cell ·Vol. 1 ·No. 2 ·1989-02-00 ·Pages 259-64

Taylor WC

Abstract

Transcription of genes encoding the light-harvesting chlorophyll a/b protein (Cab) was shown previously to be regulated by light and a number of developmental factors. I show that a circadian rhythm in transcriptional activity is superimposed on these other regulatory programs. In vitro transcription measurements in isolated maize leaf nuclei demonstrated that changes in transcription are not coincident with light-dark transitions and that diurnal changes in transcription continue in continuous light and disappear in complete darkness. Light intensity influences the amplitude of transcriptional changes but has no effect on periodicity. Major diurnal changes in Cab mRNA are evident not only in developing seedling leaves, but also in mature, fully expanded leaves. Genes encoding phosphoenolpyruvate carboxylase and the cytosolic form of aldolase show no diurnal changes in transcription.

MeSH Terms
Circadian Rhythm/genetics Darkness Gene Expression Regulation/radiation effects Light Light-Harvesting Protein Complexes Photosynthetic Reaction Center Complex Proteins/genetics RNA, Messenger/genetics Transcription, Genetic Zea mays/anatomy & histology,genetics
Chemicals
Light-Harvesting Protein Complexes Photosynthetic Reaction Center Complex Proteins RNA, Messenger
Authors & Affiliations
1 authors, click to expand affiliations / ORCID
Taylor W C
Commonwealth Scientific and Industrial Research Organization, Division of Plant Industry, Canberra, A.C.T., Australia.
References (19)
19 references, click to expand
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Article Info
Journal
The Plant cell
Abbr.
Plant Cell
ISSN
1040-4651
DOI
10.1105/tpc.1.2.259
Published
1989-02-00
Pages
259-64
Language
English
Region
England
NLM ID
9208688
PMCID
PMC159758
Subset
IM
External Links
PubMed source DOI: 10.1105/tpc.1.2.259 PMC Full Text View journal details
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