How rapid is aphid-induced signal transfer between plants via common mycelial networks?
How rapid is aphid-induced signal transfer between plants via common mycelial networks?
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DOI：
10.4161/cib.25904
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发表时间：
2013-11-01
影响因子：
--
通讯作者：
Gilbert L
中科院分区：
文献类型：
--
作者：
Babikova Z;Johnson D;Bruce T;Pickett JA;Gilbert L
丛枝菌根真菌是重要的植物共生体，能将相邻植物的根连接起来，形成共同的菌丝网络。最近的一项研究表明，这些网络可以作为蚜虫诱导的信号在植物之间的管道，激活未受感染的邻近植物的化学防御，使它们对蚜虫没有吸引力，但对它们的敌人（寄生虫）有吸引力。如果信号速度快，对邻近植物的好处就会增加，使它们能够在蚜虫攻击之前做出反应。在这里，我们确定蚜虫诱导的信号传输的速度与蚜虫（“捐助者”）和相邻的无蚜虫的植物，无论是连接或未连接到捐助者通过一个共同的菌丝网络之间的植物。从邻居连接到捐助者的植物挥发物诱导的变化开始在24小时内蚜虫侵染的捐助者。这表明了一个快速的信号，意味着接收信号的植物可能会受益，并提出了有趣的生态和进化问题。
Arbuscular mycorrhizal (AM) fungi are important plant mutualists that can connect roots of neighboring plants to form common mycelial networks. A recent study demonstrated that these networks can act as conduits for aphid-induced signals between plants, activating chemical defenses in uninfested neighboring plants so that they become unattractive to aphids but attractive to their enemies (parasitoids). The benefit to the neighboring plants will increase if the signal speed is rapid, enabling them to respond before aphids attack. Here, we determine the speed of aphid-induced signal transfer between plants infested with aphids (“donor”) and neighboring aphid-free plants that were either connected or unconnected to the donor via a common mycelial network. Induced changes in plant volatiles from neighbors connected to donors started within 24 h of aphid infestation of donors. This demonstrates a rapid signal, implying potential benefit to plants receiving the signal, and raises intriguing ecological and evolutionary questions.