Planting exotic relatives has increased the threat posed by Dothistroma septosporum to the Caledonian pine populations of Scotland.
Planting exotic relatives has increased the threat posed by Dothistroma septosporum to the Caledonian pine populations of Scotland.
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DOI：
10.1111/eva.12562
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发表时间：
2018-03
影响因子：
4.1
通讯作者：
Ennos RA
中科院分区：
文献类型：
--
作者：
Piotrowska MJ;Riddell C;Hoebe PN;Ennos RA
为了管理新出现的森林疾病并防止其在今后发生，必须确定所涉病原体的来源，并查明最终造成疾病问题的管理做法。其中一种做法是在相关的本地分类群范围内广泛种植外来树种。这可能导致新出现的森林疾病，因为这既促进了外来病原体的引入，也提供了易受感染的宿主，使本地病原体的流行病可以在其上发展。我们使用微卫星标记，以确定病原体Dothistroma septosporum负责目前爆发的Dothistroma针叶枯萎病（DNB）在苏格兰本地苏格兰苏格兰松（樟子松）种群的起源，并评估了广泛种植的两个外来松树品种的疾病爆发的发展所发挥的作用。我们区分了三个小种的D. septosporum在苏格兰，一个低的遗传多样性与引进lodgepole松（松contorta），一个高的多样性可能来自DNB流行引进科西嘉松（黑松亚种）。laricio）在英格兰和三分之一的中间多样性显然是苏格兰苏格兰苏格兰松特有的。这些种族不同的增长速度和分泌物的生产文化。在英国种植外来松树林似乎促进了两个外来种族的D. septosporum到苏格兰，现在构成威胁，本地喀里多尼亚松树直接和通过潜在的杂交和渗入的地方性种族。我们的研究结果表明，从喀里多尼亚松种群附近的外来物种的去除和限制种植材料的移动，以尽量减少目前的DNB爆发的影响。它们还表明，种植与本地物种有关的外来物种会降低而不是增强森林对病原体的抵御能力。
To manage emerging forest diseases and prevent their occurrence in the future, it is essential to determine the origin(s) of the pathogens involved and identify the management practices that have ultimately caused disease problems. One such practice is the widespread planting of exotic tree species within the range of related native taxa. This can lead to emerging forest disease both by facilitating introduction of exotic pathogens and by providing susceptible hosts on which epidemics of native pathogens can develop. We used microsatellite markers to determine the origins of the pathogen Dothistroma septosporum responsible for the current outbreak of Dothistroma needle blight (DNB) on native Caledonian Scots pine (Pinus sylvestris) populations in Scotland and evaluated the role played by widespread planting of two exotic pine species in the development of the disease outbreak. We distinguished three races of D. septosporum in Scotland, one of low genetic diversity associated with introduced lodgepole pine (Pinus contorta), one of high diversity probably derived from the DNB epidemic on introduced Corsican pine (Pinus nigra subsp. laricio) in England and a third of intermediate diversity apparently endemic on Caledonian Scots pine. These races differed for both growth rate and exudate production in culture. Planting of exotic pine stands in the UK appears to have facilitated the introduction of two exotic races of D. septosporum into Scotland which now pose a threat to native Caledonian pines both directly and through potential hybridization and introgression with the endemic race. Our results indicate that both removal of exotic species from the vicinity of Caledonian pine populations and restriction of movement of planting material are required to minimize the impact of the current DNB outbreak. They also demonstrate that planting exotic species that are related to native species reduces rather than enhances the resilience of forests to pathogens.
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影响因子：
1.8
作者：
Drenkhan, R.;Hantula, J.;Muller, M. M.
通讯作者：
Muller, M. M.
DOI：
10.1046/j.1471-8278.2000.00014.x
发表时间：
2001-03-01
期刊：
MOLECULAR ECOLOGY NOTES
影响因子：
--
作者：
Agapow, PM;Burt, A
通讯作者：
Burt, A
DOI：
10.1073/pnas.0607968104
发表时间：
2007-03-20
影响因子：
11.1
作者：
Gilbert, Gregory S.;Webb, Campbell O.
通讯作者：
Webb, Campbell O.
影响因子：
3.7
作者：
Ennos, RA
通讯作者：
Ennos, RA
影响因子：
3.2
作者：
Fabre, B.;Ioos, R.;Marcais, B.
通讯作者：
Marcais, B.