Effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in Tanoak sapwood

Jennifer Parke; Bradley Collins; Barb Lachenbruch; Everett Hansen

Treesearch

Effects of Phytophthora ramorum infection on hydraulic conductivity and tylosis formation in Tanoak sapwood

Formally Refereed

Authors:

Jennifer Parke, Bradley Collins, Barb Lachenbruch, Everett Hansen

Year:

2010

Type:

General Technical Report

Station:

Pacific Southwest Research Station

Source:

In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M. 2010. Proceedings of the Sudden Oak Death Fourth Science Symposium. Gen. Tech. Rep. PSW-GTR-229. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 87

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Abstract

Tanoak (Lithocarpus densiflorus) is highly susceptible to sudden oak death caused by Phytophthora ramorum. Symptoms include dying crowns, bleeding cankers, and, eventually, death of infected trees. The cause of mortality is not well understood, but we showed previously that naturally infected mature trees have reduced sap flow and reduced hydraulic conductivity. One possible mechanism for this is the presence of tyloses in xylem vessels formed in response to P. ramorum infection.

Parent Publication

Proceedings of the Sudden Oak Death Fourth Science Symposium

Citation

Parke, Jennifer; Collins, Bradley; Lachenbruch, Barb; Hansen, Everett. 2010. Effects of Phytophthora ramorum Infection on hydraulic conductivity and tylosis formation in Tanoak sapwood. In: Frankel, Susan J.; Kliejunas, John T.; Palmieri, Katharine M. 2010. Proceedings of the Sudden Oak Death Fourth Science Symposium. Gen. Tech. Rep. PSW-GTR-229. Albany, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Research Station. pp. 87