Morphological,Molecular and Pathological Characterization of Phytophthora amaranthi sp. nov. from Amaranth in Taiwan |
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| Authors: | Pao‐Jen Ann Jin‐Hsin Huang Jyh‐Nong Tsai Wen‐Hsiung Ko |
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| Affiliation: | 1. Plant Pathology Division, Taiwan Agricultural Research Institute, Wufeng, Taichung, Taiwan;2. Department of Plant Pathology, National Chung Hsing University, Taichung, Taiwan |
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| Abstract: | 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. |
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| Keywords: | host specificity
ITS
morphology oomycetes β ‐tubulin |
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