<?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></contributors><titles><title><style face="normal" font="default" size="100%">INCREASE IN ABILITY TO BECOME FROST-RESISTANT DURING AGEING IN QUERCUS ILEX</style></title><secondary-title><style face="normal" font="default" size="100%">PLANTA</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">1969</style></year></dates><publisher><style face="normal" font="default" size="100%">SPRINGER VERLAG</style></publisher><pub-location><style face="normal" font="default" size="100%">175 FIFTH AVE, NEW YORK, NY 10010</style></pub-location><volume><style face="normal" font="default" size="100%">88</style></volume><pages><style face="normal" font="default" size="100%">130--&amp;</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">Shoots of Quercus ilex gain more efficient ability to become frost- hardened in winter during the course of ageing. The greatest increase in frost- hardiness occurs within the first five winters. Full capacity for frost-resistance is not reached until the plant enters its reproductive phase. Roots do not change their resistance pattern with age.</style></abstract><notes><style face="normal" font="default" size="100%">APS</style></notes><research-notes><style face="normal" font="default" size="100%">APS</style></research-notes></record></records></xml>