Annexin-Mediated Calcium Signalling in Plants

Plants

关键词: annexin;    Arabidopsis;    calcium;    channel;    Medicago;    signal;    stress;   

DOI  :  10.3390/plants3010128

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2014 by the authors; licensee MDPI, Basel, Switzerland.