Morphological and Molecular Identification of Phytophthora capsici Isolates with Differential Pathogenicity in Sechium edule.

ABSTRACT: Chayote (Sechium edule) is a crop of great economic and pharmaceutical importance in Mexico. Chayote is affected by Phytophthora capsici, which causes plant wilt and fruit rot. Three isolates of P. capsici (A1-C, A2-H, and A3-O) were obtained from three producing areas in Veracruz, Mexico. Morphometric characteristics of sporangia and the colony pattern on three different media were described. They were molecularly identified by amplification of the internal transcribed spacer region (ITS) and the partial sequence of cytochrome c oxidase subunit 1 (COI), sequences that were phylogenetically analyzed. The mating type, pathogenicity in S. edule fruits, and sensitivity to metalaxyl were determined. Isolate A1-C presented the largest sporangium; all sporangia

SUBMITTER: Soto-Contreras A 

PROVIDER: S-EPMC11207793 | biostudies-literature | 2024 Jun

REPOSITORIES: biostudies-literature