Abstract

SOTO-PLANCARTE, Alejandro et al. Phytophthora capsici and P. drechsleri mating types A1 and A2 coexist in ornamental nursery plants. Rev. mex. fitopatol [online]. 2018, vol.36, n.2, pp.298-307. ISSN 2007-8080.  https://doi.org/10.18781/r.mex.fit.1712-5.

The presence of both mating types of Phytophthora species in the same pot has not been reported in hosts of commercial nurseries in Mexico. Isolates of Phytophthora were collected in commercial nurseries of Mexico City and Morelos state during 2015. Mating types A1 and A2 of Phytophthora capsici and P. drechsleri were detected on wilted plants of Capsicum annuum (stems) and Petunia x hybrida (rhizosphere), respectively. Phytophthora isolates coinoculated in planta formed oospores under greenhouse conditions. Phytophthora was reisolated from inoculated plants, and identified with morphological and molecular tools. Mating types A1 and A2 of Phytophthora capsici and P. drechsleri occur simultaneously within nursery plants, this suggests that sexual recombination and genetic variation is occurring. Mating types A1 and A2 of Phytophthora capsici and Phytophtora dechsleri were detected for the first time in Capsicum annuum and Petunia x hybrid respectively, in Mexican nurseries.

Keywords : Oomycetes; Oospores; Petunia; Capsicum annuum.

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