Endophyte-mediated resistance against white pine blister rust in Pinus monticola
Endophyte-mediated resistance against white pine blister rust in Pinus monticola
复制标题
DOI：
10.1016/j.foreco.2008.01.052
复制
发表时间：
2008-04-20
影响因子：
3.7
通讯作者：
Newcombe, George
中科院分区：
文献类型：
--
作者：
Ganley, Rebecca J.;Sniezko, Richard A.;Newcombe, George
诱导的抗性反应，包括真菌内生菌介导的抗性，已经在农作物和草系统中得到了很好的研究。然而，这些过程和共生体在森林树木中的影响知之甚少。真菌内生菌已被发现在所有针叶林系统检查到目前为止，并已被假设为参与抗性介导的反应。然而，在功能研究的情况下，这些内生菌对宿主植物的扩展表型的影响尚不清楚。在这项研究中，我们证明，真菌内生菌从松是有效的，在增加对外来病原菌茶藨子柱锈菌，这是负责毁灭性的疾病称为白松疱锈病宿主植物的生存。先前接种真菌内生菌的幼苗比无内生菌的幼苗存活时间更长，并且还显示出白松疱锈病严重程度的一些降低。发现这种内生菌介导的抗性随着时间的推移是有效的，表明持久性，并且假设是诱导抗性的一种形式。总体而言，这表明真菌内生菌可能在生物群落结构中起决定性作用，并可能为防治病虫害提供有用的替代或辅助管理工具。(c)2008 Elsevier B.V.保留所有权利。
Induced resistance responses, including fungal endophyte-mediated resistance, have been well studied in both agricultural crops and grass systems. Yet, the effect of these processes and symbionts in forest trees is poorly known. Fungal endophytes have been found in all conifer forest systems examined to date and have been hypothesised to be involved in resistance-mediated responses. However, in the absence of functional studies the influence of these endophytes on the extended phenotype of the host plant is unclear. In this study we demonstrate that fungal endophytes from Pinus monticola were effective at increasing survival in host plants against the exotic pathogen Cronartium ribicola, which is responsible for the devastating disease called white pine blister rust. Seedlings previously inoculated with fungal endophytes lived longer than endophyte-free seedlings and also showed some reduction in white pine blister rust disease severity. This endophyte-mediated resistance was found to be effective over time, indicating persistence, and is hypothesised to be a form of induced resistance. Overall, this suggests fungal endophytes may play a determinative role in the structure of biological communities and could provide a useful alternative or ancillary management tool for combating pests and diseases. (c) 2008 Elsevier B.V. All rights reserved.