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1559537 
Journal Article 
Reactive Oxygen Species during Plant-microorganism Early Interactions 
Nanda, AK; Andrio, E; Marino, D; Pauly, N; Dunand, C 
2010 
Yes 
Journal of Integrative Plant Biology
ISSN: 1672-9072 
52 
2 
195-204 
20377681 
WOS:000276034000008 
Reactive Oxygen Species (ROS) are continuously produced as
a result of aerobic metabolism or in response to biotic and abiotic stresses. ROS are not only
toxic by-products of aerobic metabolism, but are also signalling molecules involved in several
developmental processes in all organisms. Previous studies have clearly shown that an oxidative
burst often takes place at the site of attempted invasion during the early stages of most plant-
pathogen interactions. Moreover, a second ROS production can be observed during certain types of
plant-pathogen interactions, which triggers hypersensitive cell death (HR). This second ROS wave
seems absent during symbiotic interactions. This difference between these two responses is
thought to play an important signalling role leading to the establishment of plant defense. In
order to cope with the deleterious effects of ROS, plants are fitted with a large panel of
enzymatic and non-enzymatic antioxidant mechanisms. Thus, increasing numbers of publications
report the characterisation of ROS producing and scavenging systems from plants and from
microorganisms during interactions. In this review, we present the current knowledge on the ROS
signals and their role during plant-microorganism interactions.