<?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%">Vélez, M. L.</style></author><author><style face="normal" font="default" size="100%">Silva, P. V.</style></author><author><style face="normal" font="default" size="100%">Troncoso, O. A.</style></author><author><style face="normal" font="default" size="100%">Greslebin, A. G.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Alteration of physiological parameters of Austrocedrus chilensis by the pathogen Phytophthora austrocedrae</style></title><secondary-title><style face="normal" font="default" size="100%">Plant Pathology</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">cypress root rot</style></keyword><keyword><style  face="normal" font="default" size="100%">effectors</style></keyword><keyword><style  face="normal" font="default" size="100%">hydraulic conductivity</style></keyword><keyword><style  face="normal" font="default" size="100%">mal del cipr√©s</style></keyword><keyword><style  face="normal" font="default" size="100%">photosynthesis</style></keyword><keyword><style  face="normal" font="default" size="100%">xylem colonization</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2012</style></year></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://dx.doi.org/10.1111/j.1365-3059.2011.02585.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%">61</style></volume><pages><style face="normal" font="default" size="100%">877–888</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;The effect of the pathogen &lt;em&gt;Phytophthora austrocedrae&lt;/em&gt; on tree physiology of &lt;em&gt;Austrocedrus chilensis&lt;/em&gt; in Patagonia was studied in a 4-week study. In the first week, stem-inoculated saplings showed a significant decrease in photosynthesis (A) without alteration of stomatal conductance (gs) or stem-specific hydraulic conductivity (Ks). From the second week on, progressive decreases in A, gs and Ks were observed, concomitantly with development of significant stem lesions. Water use efficiency (WUE) increased in the second week and declined progressively from the third week. Hyphae and resinous materials were observed in tracheids and rays below lesions. Necrosis of parenchyma ray cells and blockage of tracheids torus were observed. Healthy xylem showed no resinous materials or tracheid blockage, but abundant starch in rays, which was absent in altered xylem. The culture filtrate (CF) of the pathogen was shown to induce changes in extracellular pH and conductivity, and increased necrosis in tissues of leaves and stem challenged with CF in vitro. Similar results were obtained in leaf tissues of the inoculated saplings in vivo. CF injection into xylem of saplings induced a decline in A and disturbance of leaf tissue integrity, without altering gs, WUE or Ks. The decrease of A correlated with changes in tissue integrity. A possible mechanism of &lt;em&gt;A. chilensis&lt;/em&gt; decline induced by &lt;em&gt;P. austrocedrae&lt;/em&gt; is discussed.&lt;/p&gt;</style></abstract></record></records></xml>