00446nas a2200097 4500008004100000245007300041210006900114260003900183100001600222856011000238 2004 eng d00aResistance mechanisms of Port-Orford-cedar to Phytophthora lateralis0 aResistance mechanisms of PortOrfordcedar to Phytophthora lateral aCorvallisbOregon State University1 aOh, Eunsung uhttps://forestphytophthoras.org/references/resistance-mechanisms-port-orford-cedar-phytophthora-lateralis05098nas a2200193 4500008004100000022001300041245011000054210006900164260001600233300001400249490000600263520447400269100001604743700002404759700002604783700002704809700002304836856004504859 2013 eng d a2210634000aSurveys of soil and water reveal a goldmine of Phytophthora diversity in South African natural ecosystems0 aSurveys of soil and water reveal a goldmine of Phytophthora dive cJun-06-2015 a123 - 1310 v43 a

Phytophthora species are well-known as destructive plant pathogens, especially in natural ecosystems. It is ironic, therefore, how little is known regarding the Phytophthora diversity in South African natural woody ecosystems. In this study, Phytophthora species were isolated using standard baiting techniques from 182 soil and water samples and these were identified based on ITS and coxI sequence data. The 171 resulting Phytophthora isolates resided in 14 taxa including six known species (P. multivora, P. capensis, P. cryptogea, P. frigida, P. cinnamomi, P. cinnamomi var. parvispora), the known but as yet unnamed Phytophthora sp. PgChlamydo, P. sp. emzansi, and P. sp. Kununurra and five novel taxa referred to as P. sp. stellaris, P. sp. Umtamvuna P. sp. canthium, P. sp. xWS, P. sp. xHennops. Four of the new taxa were found exclusively in water and two of these are hybrids. The most commonly isolated species from soil was P. multivora, a species recently described from Western Australia. Phytophthora frigida was isolated for the first time from stream water. With the exception of P. cinnamomi, very little is known regarding the biology, epidemiology or origin of Phytophthora in South Africa.

1 aOh, Eunsung1 aGryzenhout, Marieka1 aWingfield, Brenda, D.1 aWingfield, Michael, J.1 aBurgess, Treena, I uhttp://www.imafungus.org/Issue/41/22.pdf