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Morphological, Molecular and Pathological Characterization of Phytophthora amaranthi sp. nov. from Amaranth in Taiwan
Author(s) -
Ann PaoJen,
Huang JinHsin,
Tsai Jyhg,
Ko WenHsiung
Publication year - 2016
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/jph.12433
Subject(s) - oospore , biology , phytophthora , sporangium , pedicel , botany , antheridium , phytophthora sojae , amaranth , spore , agronomy
In the spring of 2007, a serious disease on amaranth was noticed in several farms in the major amaranth production area in central Taiwan. Abundant oospores were found in the disease tissues. A species of Phytophthora was consistently isolated from disease tissues. The organism formed abundant oospores with smooth walls and with amphigynous antheridia in single culture. Sporangia were partially deciduous with short‐ to medium‐length pedicels. Morphological characteristics of this organism did not match any reported Phytophthora species, and the organism was named Phytophthora amaranthi . Pathogenicity tests and molecular characterization confirmed the identity of the organism as a new pathogen of amaranth and a new species of Phytophthora .