Abstract
Plant cell walls provide structural support during development and represent together with the cuticle the first line of defense against biotic and abiotic stress. In recent years, evidence has accumulated that a dedicated plant cell wall integrity (CWI) maintenance mechanism exists. This mechanism monitors and maintains functional integrity of the cell wall during different biological processes. The available data suggest that it may represent a component of the stress response mechanisms underlying biotic and abiotic stress responses, which has not been identified previously as a distinct mechanism. Here I will review the available evidence regarding the mode of action of the CWI maintenance mechanism and discuss its role in the context of biotic plant stress response mechanisms.
Highlights
Plant cells need to maintain the functional integrity of their walls during cell morphogenesis and exposure to biotic/abiotic stress
This review will focus on recent developments regarding the role of cell wall integrity (CWI) maintenance during biotic stress responses
By combining inputs from a turgor pressure sensor (SLN1), mechano-perception (MID1/CCH1), and dedicated cell wall damage (CWD) sensors (WSC1, 2, 3, MID2, MTL1) the yeast CWI maintenance network generates signals that permit highly specific responses to any challenge that impairs the functional integrity of the yeast cell wall
Summary
Plant cells need to maintain the functional integrity of their walls during cell morphogenesis and exposure to biotic/abiotic stress. The available evidence suggests that a dedicated plant cell wall integrity (CWI) maintenance mechanism exists (Wolf et al, 2011).
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