Interactions between circadian and hormonal signalling in plants



Robertson FC, Skeffington AW, Gardner MJ & Webb AAR (2009) Interactions between circadian and hormonal signalling in plants. Skeffington A (Researcher) Plant Molecular Biology, 69 (4), pp. 419-427.

Growth and development of plants is controlled by external and internal signals. Key internal signals are those generated by hormones and the circadian clock. We highlight interactions between the circadian clock and hormonal signalling networks in regulating the physiology and growth of plants. Microarray analysis has shown that a significant proportion of transcripts involved in hormonal metabolism, catabolism, perception and signalling are also regulated by the circadian clock. In particular, there are interactions between the clock and abscisic acid, auxin, cytokinin and ethylene signalling. We discuss the role of circadian modulation (‘gating’) of hormonal signals in preventing temporally inappropriate responses. A consideration of the daily changes in physiology provides evidence that circadian gating of hormonal signalling couples the rhythmic regulation of carbon and water utilisation to rhythmic patterns of growth.

Circadian clock; Hormone; Abscisic acid; Auxin; Cytokinin; Ethylene; Calcium; Cold; Arabidopsis

Plant Molecular Biology: Volume 69, Issue 4

Publication date31/03/2009
Publication date online15/10/2008
Date accepted by journal21/09/2008
PublisherSpringer Science and Business Media LLC

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Dr Alastair Skeffington

Dr Alastair Skeffington

Lecturer in Environmental Genomics, Biological and Environmental Sciences