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Article Addendum

Cyclic Nucleotide Gated Channels and Ca²⁺-Mediated Signal Transduction During Plant Innate Immune Response to Pathogens

Wei Ma, Keiko Yoshioka and Gerald A. Berkowitz

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Transitory perturbations in the level of cytosolic Ca²⁺ are well known to be involved in numerous cell signaling pathways in both plant and animal systems. However, not much is known at present about the molecular identity of plant plasma membrane Ca²⁺ conducting ion channels or their specific roles in signal transduction cascades. A recent study employing genetic approaches as well as patch clamp electrophysiological analysis of channel currents has provided the first such direct evidence linking a specific gene product with inward Ca²⁺ currents across the plant cell membrane. This work identified Ca²⁺ permeation through (Arabidopsis) cyclic nucleotide gated channel isoform 2 (CNGC2) as contributing to the plant innate immunity signaling cascade initiated upon perception of a pathogen. Here, we expand on the implications of CNGC2 mediated cytosolic Ca²⁺ elevations associated with plant cell response to pathogen recognition, and propose some additional steps that may be involved in the innate immunity signal cascade.

Authors

Wei Ma

Agricultural Biotechnology Laboratory, University of Connecticut, Storrs, Connecticut USA

Keiko Yoshioka

University of Toronto, Toronto, Ontario, Canada

Gerald A. Berkowitz

Agricultural Biotechnology Laboratory, University of Connecticut, Storrs, Connecticut USA

Purchase article for $19

Subscribe to this journal for $79/year