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    Author(s): Justin P. Shaffer; Jennifer L. Parke
    Date: 2013
    Source: In: Frankel, S.J.; Kliejunas, J.T.; Palmieri, K.M.; Alexander, J.M. tech. coords. Proceedings of the sudden oak death fifth science symposium. Gen. Tech. Rep. PSW-GTR-243. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 160-163
    Publication Series: General Technical Report (GTR)
    Station: Pacific Southwest Research Station
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    Description

    Phytophthora ramorum characteristically produces large amounts of chlamydospores in vitro, but the role of these propagules in the disease cycle remains unclear. Germination is difficult to observe and quantify if chlamydospores are not free of mycelium, and the low frequency of germination commonly reported suggests that requirements for germination may not have been entirely met. Here, we conducted germination experiments factoring for chlamydospore age, chlamydospore isolation method, and nutrient medium. Chlamydospore germination frequency in each of the treatments ranged from 0 to 70 percent. Results suggest that chlamydospore age, isolation method, and nutrient media significantly affect chlamydospore germination.

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    Citation

    Shaffer, Justin P.; Parke, Jennifer L. 2013. Germination of Phytophthora ramorum chlamydospores: a comparison of separation method and chlamydospore age. In: Frankel, S.J.; Kliejunas, J.T.; Palmieri, K.M.; Alexander, J.M. tech. coords. Proceedings of the sudden oak death fifth science symposium. Gen. Tech. Rep. PSW-GTR-243. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station: 160-163.

    Keywords

    Phytophthora ramorum, chlamydospores, germination, Oomycete, ecology.

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