<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">P.M. Scott</style></author><author><style face="normal" font="default" size="100%">T. Jung</style></author><author><style face="normal" font="default" size="100%">Shearer, B. L.</style></author><author><style face="normal" font="default" size="100%">P.A. Barber</style></author><author><style face="normal" font="default" size="100%">Calver, M.</style></author><author><style face="normal" font="default" size="100%">Hardy, G. E. St. J.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Pathogenicity of Phytophthora multivora to Eucalyptus gomphocephala and Eucalyptus marginata</style></title><secondary-title><style face="normal" font="default" size="100%">Forest Pathology</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1111/j.1439-0329.2011.00753.x</style></url></web-urls></urls><publisher><style face="normal" font="default" size="100%">Blackwell Publishing Ltd</style></publisher><volume><style face="normal" font="default" size="100%">42</style></volume><pages><style face="normal" font="default" size="100%">289–298</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;&lt;em&gt;Phytophthora multivora&lt;/em&gt; is associated with the rhizosphere of declining &lt;em&gt;Eucalyptus gomphocephala&lt;/em&gt;, &lt;em&gt;Eucalyptus marginata&lt;/em&gt; and &lt;em&gt;Agonis flexuosa&lt;/em&gt;. Two pathogenicity experiments were conducted. The first experiment examined the pathogenicity of five &lt;em&gt;P. multivora&lt;/em&gt; isolates and one &lt;em&gt;Phytophthora cinnamomi&lt;/em&gt; isolate on the root systems of &lt;em&gt;E. gomphocephala&lt;/em&gt; and one &lt;em&gt;P. multivora&lt;/em&gt; isolate on the root system of &lt;em&gt;E. marginata&lt;/em&gt;. In the second experiment, the pathogenicity of &lt;em&gt;P. multivora&lt;/em&gt; to &lt;em&gt;E. gomphocephala&lt;/em&gt; and &lt;em&gt;E. marginata&lt;/em&gt; saplings was measured using under-bark stem inoculation. In Experiment 1, the &lt;em&gt;P. cinnamomi&lt;/em&gt; isolate was more aggressive than all &lt;em&gt;P. multivora&lt;/em&gt; isolates causing significant loss of fine roots and plant death. Two &lt;em&gt;P. multivora&lt;/em&gt; isolates and the &lt;em&gt;P. cinnamomi&lt;/em&gt; isolate caused significant losses of &lt;em&gt;E. gomphocephala&lt;/em&gt; fine roots 0-2 mm in diameter and significantly reduced the surface area of roots 0-1 mm in diameter. One &lt;em&gt;P. multivora&lt;/em&gt; and the &lt;em&gt;P. cinnamomi&lt;/em&gt; isolate significantly reduced the surface area of roots 1-2 mm in diameter. Two of the &lt;em&gt;P. multivora&lt;/em&gt; isolates significantly reduced the number of &lt;em&gt;E. gomphocephala&lt;/em&gt; root tips. In &lt;em&gt;E. marginata&lt;/em&gt;, the length and surface area of roots 0-1 mm in diameter and number of root tips were significantly reduced by &lt;em&gt;P. multivora infestation&lt;/em&gt;. Rhizosphere infestation with the &lt;em&gt;P. multivora&lt;/em&gt; isolates and &lt;em&gt;P. cinnamomi&lt;/em&gt; isolate on &lt;em&gt;E. gomphocephala&lt;/em&gt;, and one &lt;em&gt;P. multivora&lt;/em&gt; isolate on &lt;em&gt;E. marginata&lt;/em&gt;, did not significantly influence the foliar nutrient concentrations. In Experiment 2, under-bark inoculation with &lt;em&gt;P. multivora&lt;/em&gt; caused significant lesion extension in &lt;em&gt;E. gomphocephala&lt;/em&gt; and &lt;em&gt;E. marginata&lt;/em&gt; saplings, compared to the control. We propose that &lt;em&gt;P. multivora&lt;/em&gt; is inciting &lt;em&gt;E. gomphocephala&lt;/em&gt; and &lt;em&gt;E. marginata&lt;/em&gt; decline by causing fine root loss and subsequently interfering with nutrient cycling throughout the plant. The impact of fine root loss on the physiology of plants in sites infested with &lt;em&gt;P. multivora&lt;/em&gt; requires further research.&lt;/p&gt;</style></abstract></record></records></xml>