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首页> 外文期刊>The Canadian Entomologist >Callus formation and bark moisture as potential physical defenses of northern red oak, Quercus rubra, against red oak borer, Enaphalodes rufului (Coleoptera: Cerambycidae)
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Callus formation and bark moisture as potential physical defenses of northern red oak, Quercus rubra, against red oak borer, Enaphalodes rufului (Coleoptera: Cerambycidae)

机译：愈伤组织的形成和树皮的水分可能是北部赤栎，栎栎对赤栎bore，红唇ap（Enaphalodes rufului）潜在的物理防御作用

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摘要

The red oak borer, Enaphalodes rufulus (Haldeman), is a native wood-boring beetle implicated as a major contributor to recent high levels of oak mortality in northern Arkansas. Northern red oaks, Quercus rubra L. (Fagaceae), were grouped into three classes of red oak borer infestation history based on crown condition and basal red oak borer emergence holes: class I (low infestation), class II (moderate infestation), and class III (high infestation). In 2004 and 2005, trees from each class were mechanically wounded and callus formation was measured after one year. Class I trees exhibited significantly greater callus formation than class III trees in both years. Monthly measurements in spring and summer of 2006 indicated significant differences in callus formation among classes, with class I trees healing over significantly earlier. Moisture was measured in bark samples removed 1 week and 4 weeks after initiation of three treatments: control, mechanical wounding, and artificial insertion of larvae. Moisture levels did not vary among infestation classes or treatments. This research indicates that bark moisture is likely not a defense against red oak borer, but that callus overgrowth may be a defense early in the second year of the life cycle in healthy trees.
机译：红橡木bore虫Enaphalodes rufulus（Haldeman）是一种原木无聊的甲虫，与最近阿肯色州北部橡木死亡率高有关。根据树冠状况和基底红橡树蛀虫出苗孔，将北部红橡栎栎（Quercus rubra L.（Fagaceae））分为三类：第一类（低度侵扰），第二类（中度侵扰）和III级（高发）。在2004年和2005年，对每一类树木进行机械伤害，并在一年后测量愈伤组织的形成。在这两年中，I类树木的愈伤组织形成明显大于III类树木。 2006年春季和夏季的月度测量结果表明，各类之间愈伤组织的形成存在显着差异，其中I类树的愈合时间明显较早。在开始以下三种处理后1周和4周取出的树皮样品中测量水分：对照，机械损伤和幼虫的人工插入。水分水平在不同的侵扰等级或处理之间没有变化。这项研究表明，树皮的水分可能不是防御赤栎蛀虫的方法，但是愈伤组织的过度生长可能是健康树生命周期第二年初期的防御方法。

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