1. Variability in galling caused by Leptocybe invasa Fisher & La Salle has been reported in several species and hybrids of Eucalyptus.
2. Genetic diversity within Eucalyptus camaldulensis Dehnh. could confer resistance to L. invasa via variation in plant specialized metabolites or plant responses detrimental to insect herbivores. Moreover, optimal defence theory proposes that plants will invest more constitutive resistance in parts that are vulnerable to herbivore attack, such as immature leaves and apical buds, which are prone to galling.
3. We investigated constitutive resistance of subspecies and genotypes of E. camaldulensis to L. invasa while controlling for differences among growing conditions characteristic of their autochthonous Australian habitats using common nursery and garden arboreta plantings. Data on galling intensity, gall size, leaf phenolics and leaf physical attributes were used to investigate differences in susceptibility.
4. We show that E. camaldulensis exhibits both constitutive and induced resistance to L. invasa. Intraspecific variability in galling was pronounced and correlated with concentrations of quinic acid derivatives and hypersensitive abscission of leaves. Whether these metabolites directly affect the survival of eggs or larvae remains to be determined. Hypersensitive leaf abscission in subspecies of E. camaldulensis in response to injury by a galling insect has not been reported previously and warrants investigation.

中文翻译：

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Eucalyptus camaldulensis 亚种对 Leptocybe invasa 咬伤的抗性：奎尼酸衍生物是否会导致叶片脱落和减少咬伤？

1. 据报道，在桉树的几个物种和杂交种中，由Leptocybe invasa Fisher & La Salle引起的擦伤变异性。
2. Eucalyptus camaldulensis Dehnh的遗传多样性。可以通过植物特殊代谢物的变化或对昆虫食草动物有害的植物反应赋予对L. invasa的抗性。此外，最优防御理论提出，植物会在易受食草动物攻击的部位投入更多的组成抗性，例如容易发生擦伤的未成熟叶子和顶端芽。
3. 我们研究了E. camaldulensis亚种和基因型对L. invasa的组成抗性，同时使用常见的苗圃和花园乔木种植控制其本土澳大利亚栖息地的生长条件特征之间的差异。使用有关瘿强度、瘿大小、叶片酚类物质和叶片物理属性的数据来​​研究敏感性差异。
4. 我们表明E. camaldulensis表现出对L. invasa的组成性和诱导性抗性。擦伤的种内变异性很明显，并且与奎尼酸衍生物的浓度和叶子的过敏性脱落相关。这些代谢物是否直接影响卵或幼虫的存活仍有待确定。以前没有报道过E. camaldulensis亚种因咬虫伤害而导致的过敏性叶片脱落，值得调查。