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Plants 2014, 3(1), 128-140;

Annexin-Mediated Calcium Signalling in Plants

Department of Plant Sciences, University of Cambridge, Cambridge CB2 3EA, UK
Received: 20 December 2013 / Revised: 13 February 2014 / Accepted: 19 February 2014 / Published: 26 February 2014
(This article belongs to the Special Issue Calcium Signaling in Plants)
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Calcium-permeable channels underpin elevations of free calcium that encode specific signals in stress adaptation, development and immunity. Identifying the genes encoding these channels remains a central goal of plant signalling research. Evidence now suggests that members of the plant annexin family function as unconventional calcium-permeable channels, with roles in development and stress signalling. Arabidopsis annexin 1 mediates a plasma membrane calcium-permeable conductance in roots that is activated by reactive oxygen species. Recombinant annexin 1 forms a very similar conductance in planar lipid bilayers, indicating that this protein could facilitate the in vivo conductance directly. The annexin 1 mutant is impaired in salinity-induced calcium signalling. Protein–protein interactions, post-translational modification and dynamic association with membranes could all influence annexin-mediated calcium signalling and are reviewed here. The prospect of annexins playing roles in calcium signalling events in symbiosis and immunity are considered. View Full-Text
Keywords: annexin; Arabidopsis; calcium; channel; Medicago; signal; stress annexin; Arabidopsis; calcium; channel; Medicago; signal; stress

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Davies, J.M. Annexin-Mediated Calcium Signalling in Plants. Plants 2014, 3, 128-140.

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