The role of ROS signaling in cross-tolerance: from model to crop - PubMed (original) (raw)
Review
The role of ROS signaling in cross-tolerance: from model to crop
Ilse Barrios Perez et al. Front Plant Sci. 2014.
Abstract
Reactive oxygen species (ROS) are key signaling molecules produced in response to biotic and abiotic stresses that trigger a variety of plant defense responses. Cross-tolerance, the enhanced ability of a plant to tolerate multiple stresses, has been suggested to result partly from overlap between ROS signaling mechanisms. Cross-tolerance can manifest itself both as a positive genetic correlation between tolerance to different stresses (inherent cross-tolerance), and as the priming of systemic plant tolerance through previous exposure to another type of stress (induced cross-tolerance). Research in model organisms suggests that cross-tolerance could be used to benefit the agronomy and breeding of crop plants. However, research under field conditions has been scarce and critical issues including the timing, duration, and intensity of a stressor, as well as its interactions with other biotic and abiotic factors, remain to be addressed. Potential applications include the use of chemical stressors to screen for stress-resistant genotypes in breeding programs and the agronomic use of chemical inducers of plant defense for plant protection. Success of these applications will rely on improving our understanding of how ROS signals travel systemically and persist over time, and of how genetic correlations between resistance to ROS, biotic, and abiotic stresses are shaped by cooperative and antagonistic interactions within the underlying signaling pathways.
Keywords: GST; acclimation; oxidative stress; oxylipin; quantitative disease resistance; systemic resistance.
Figures
FIGURE 1
Integration of experimental approaches to studying plant cross-tolerance. Three hypothetical stresses (biotic or abiotic) are shown in blue, green, and yellow. Marker-trait association studies (A), pretreatment effect studies (B), and gene expression studies (C), when performed under consistent experimental conditions, can be used to test a series of null hypotheses. ROS signaling is proposed to play a key role in cross-tolerance responses.
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