Suppr超能文献

损伤诱导的山艾树抗性:挥发性物质是植株内和植株间通讯的关键。

Damage-induced resistance in sagebrush: volatiles are key to intra- and interplant communication.

作者信息

Karban Richard, Shiojiri Kaori, Huntzinger Mikaela, McCall Andrew C

机构信息

Department of Entomology, University of California, Davis, California 95616, USA.

出版信息

Ecology. 2006 Apr;87(4):922-30. doi: 10.1890/0012-9658(2006)87[922:drisva]2.0.co;2.

Abstract

Airborne communication between individuals, called "eavesdropping" in this paper, can cause plants to become more resistant to herbivores when a neighbor has been experimentally clipped. The ecological relevance of this result has been in question, since individuals may be too far apart for this interaction to affect many plants in natural populations. We investigated induced resistance to herbivory in sagebrush, Artemisia tridentata, caused by experimental clipping of the focal plant and its neighbors. We found no evidence for systemic induced resistance when one branch was clipped and another branch on the same plant was assayed for naturally occurring damage. In this experiment, air contact and plant age were not controlled. Previous work indicated that sagebrush received less damage when a neighboring upwind plant within 15 cm had been experimentally clipped. Here we found that pairs of sagebrush plants that were up to 60 cm apart were influenced by experimental clipping of a neighbor. Furthermore, we observed that most individuals had conspecific neighbors that were much closer than 60 cm. Air contact was essential for communication; treatments that reduced airflow between neighboring individuals, either because of wind direction or bagging, prevented induced resistance. Airflow was also necessary for systemic induced resistance among branches within an individual. Reports from the literature indicated that sagebrush is highly sectorial, as are many desert shrubs. Branches within a sagebrush plant do not freely exchange material via vascular connections and apparently cannot rely on an internal signaling pathway for coordinating induction of resistance to herbivores. Instead, they may use external, volatile cues. This hypothesis provides a proximal explanation for why sagebrush does not demonstrate systemic induced resistance without directed airflow, and why airborne communication between branches induces resistance.

摘要

个体之间的空气传播交流,在本文中称为“窃听”,当邻居被实验性修剪时,会使植物对食草动物产生更强的抗性。这一结果的生态相关性一直存在疑问,因为在自然种群中,个体之间可能距离过远,这种相互作用无法影响到许多植物。我们研究了在三齿蒿(Artemisia tridentata)中,对焦点植物及其邻居进行实验性修剪所引发的对食草动物的诱导抗性。当修剪一个枝条,而对同一植株上的另一个枝条检测自然发生的损伤时,我们没有发现系统诱导抗性的证据。在这个实验中,空气接触和植株年龄没有得到控制。先前的研究表明,当在15厘米范围内的上风邻居植物被实验性修剪时,三齿蒿受到的损伤较少。在这里,我们发现相距达60厘米的成对三齿蒿植株受到邻居实验性修剪的影响。此外,我们观察到大多数个体的同种邻居距离比60厘米近得多。空气接触对于交流至关重要;由于风向或套袋而减少相邻个体之间气流的处理,会阻止诱导抗性。气流对于个体内枝条之间的系统诱导抗性也是必需的。文献报道表明,三齿蒿和许多沙漠灌木一样,具有高度的扇形分布。三齿蒿植株内的枝条不会通过维管连接自由交换物质,显然也不能依靠内部信号通路来协调对食草动物抗性的诱导。相反,它们可能利用外部的挥发性信号。这一假设为为什么三齿蒿在没有定向气流时不会表现出系统诱导抗性,以及为什么枝条之间的空气传播交流会诱导抗性提供了一个近因解释。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验