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Research article - Peer-reviewed, 2009

Ethylene levels are regulated by a plant encoded 1-aminocyclopropane-1-carboxylic acid deaminase

McDonnell, Lisa; Plett, Jonathan M.; Andersson-Gunneras, Sara; Kozela, Christopher; Dugardeyn, Jasper; Van Der Straeten, Dominique; Glick, Bernard R.; Sundberg, Bjorn; Regan, Sharon


Control of the levels of the plant hormone ethylene is crucial in the regulation of many developmental processes and stress responses. Ethylene production can be controlled by altering endogenous levels of 1-aminocyclopropane-1-carboxylic acid (ACC), the immediate precursor to ethylene or by altering its conversion to ethylene. ACC is known to be irreversibly broken down by bacterial or fungal ACC deaminases (ACDs). Sequence analysis revealed two putative ACD genes encoded for in the genome of Arabidopsis thaliana (A. thaliana) and we detected ACD activity in plant extracts. Expression of one of these A. thaliana genes (AtACD1) in bacteria indicated that it had ACD activity. Moreover, transgenic plants harboring antisense constructs of the gene decreased ACD activity to 70% of wild-type (WT) levels, displayed an increased sensitivity to ACC and produced significantly more ethylene. Taken together, these results show that AtACD1 can act as a regulator of ACC levels in A. thaliana.

Published in

Physiologia Plantarum
2009, volume: 136, number: 1, pages: 94-109

Authors' information

McDonnell, Lisa
Carleton University
Plett, Jonathan M.
Queen's University
Gunnerås, Sara
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Kozela, Christopher
Carleton University
Dugardeyn, Jasper
Ghent University
Van Der Straeten, Dominique
Ghent University
Glick, Bernard R.
University of Waterloo
Swedish University of Agricultural Sciences, Department of Forest Genetics and Plant Physiology
Regan, Sharon
Queen's University

UKÄ Subject classification

Forest Science

Publication Identifiers


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