Resumo

CHAVEZ-DIAZ, Ismael Fernando  e  ZAVALETA-MEJIA, Emma. Molecular communication in the pathosystem Capsicum species -Phytophthora capsici. Rev. mex. fitopatol [online]. 2019, vol.37, n.2, pp.251-278.  Epub 30-Set-2020. ISSN 2007-8080.  https://doi.org/10.18781/r.mex.fit.1901-3.

Phytophthora capsici is a phytopathogen that limits the production of vegetables worldwide. It is known to be the causal agent of the wilting of chili pepper, which affects the plantations of the genus Capsicum, causing almost complete losses. The pathosystem Capsicum spp. - P. capsici has been widely studied, but it is still far from being understood. Investigations on different chili pepper cultivars resistant to the oomycete suggest that most genotypes carry defense genes to confront the pathogen; however, the defensive capacity differs in intensity and speed. The specific resistance of some Capsicum species to P. capsici seems to be unrelated to R proteins, but rather mediated by a complex molecular dialogue. In some species of Capsicum, the growth regulators play an important part in this dialogue that leads the plant to express the genes related to defense, locally at first, by limiting the progress of the oomycete, and later, systemically, by preventing new points of infection. This revision carries out a critical analysis of the information available on the communication network established between chili plants and P. capsici, which defines the outcome of the interaction between the plant and P. capsici as resistant, tolerant or susceptible.

Palavras-chave : Molecular dialogue; plant immunity; plant-pathogen interaction; defense genes; growth regulators with the function of messenger molecules.

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