<?xml version='1.0' encoding='UTF-8'?><xml><records><record><source-app name="HighWire" version="7.x">Drupal-HighWire</source-app><ref-type name="Journal Article">17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">South, David B</style></author><author><style face="normal" font="default" size="100%">Shelton, Jason</style></author><author><style face="normal" font="default" size="100%">Enebak, Scott A</style></author></authors><secondary-authors></secondary-authors></contributors><titles><title><style face="normal" font="default" size="100%">&lt;em&gt;Geotropic Lateral Roots&lt;/em&gt; of Container-grown &lt;em&gt;Longleaf Pine Seedlings&lt;/em&gt;</style></title><secondary-title><style face="normal" font="default" size="100%">Native Plants Journal</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2001</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2001-09-21 00:00:00</style></date></pub-dates></dates><pages><style  face="normal" font="default" size="100%">126-130</style></pages><doi><style  face="normal" font="default" size="100%">10.3368/npj.2.2.126</style></doi><volume><style face="normal" font="default" size="100%">2</style></volume><issue><style face="normal" font="default" size="100%">2</style></issue><abstract><style  face="normal" font="default" size="100%">More than 95% of container-grown longleaf pine (Pinus palustris P. Mill.) seedlings had roots growing downward vertically (geotropically) when examined 7 to 8 mo after transplanting into sand. Geotropic roots were rarely the original taproot (&lt; 0.5%) but were usually adventitious lateral roots that had formed about the callus tissue. Air-pruning in the nursery results in callus formation at the end of the taproot and typically, 1 or more adventitious roots emerge just above the callus tip. Although many first-order lateral roots were deflected downward by container walls, few exhibited positive geotropic growth after transplanting. Most grew in directions other than straight down. In this study, about 4% of the seedlings lacked geotropic roots. Longleaf pines with a long taproot or sinker roots are less susceptible to toppling at a young age than are trees without vertical roots.</style></abstract></record></records></xml>