Plants are hubs of organismic interactions. They constantly engage in beneficial or competitive interactions with fungi, oomycetes, bacteria, insects, nematodes, and other plants. To adjust the molecular processes necessary for establishment maintenance defense against pathogens herbivores, plants have evolved intricate regulatory mechanisms. Besides canonical plant immune system that acts as p...

Few microorganisms match the impact that the oomycetes have had on mankind. This distinct lineage of eukaryotes is wellknown for its most notorious member, Phytophthora infestans, the agent of the nineteenth century Irish potato famine, and several other devastating pathogens of cultivated and wild plants [1]. Indeed, more than 60% of oomycete species infect plants [2]. Less known is the fact t...

Some oomycetes species are severe pathogens of fish or crops. As such, they are responsible for important losses in the aquaculture industry as well as in agriculture. Saprolegnia parasitica is a major concern in aquaculture as there is currently no method available for controlling the diseases caused by this microorganism. The cell wall is an extracellular matrix composed essentially of polysa...

Nonhost disease resistance is the most common form of disease resistance exhibited by plants against the majority of potentially pathogenic microorganisms. Recently, several components of nonhost disease resistance have been identified. Nonhost resistance exhibited against bacteria, fungi and oomycetes can be of two types. Type I nonhost resistance does not produce any visible symptoms whereas ...