Interplant communication of tomato plants through underground common mycorrhizal networks.
Interplant communication of tomato plants through underground common mycorrhizal networks.
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DOI：
10.1371/journal.pone.0013324
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发表时间：
2010-10-13
期刊：
影响因子：
3.7
通讯作者：
Yihdego WG
中科院分区：
文献类型：
--
作者：
Song YY;Zeng RS;Xu JF;Li J;Shen X;Yihdego WG
植物可以通过响应受攻击植物发出的化学信号来防御病原体和草食动物的攻击。众所周知，这种信号可以通过空气传递。从理论上讲，植物也可以通过地下共同菌根网络（CMN）相互沟通，这些网络将多个植物的根连接起来。然而，到目前为止，研究主要集中在植物之间的碳营养运动，没有证据表明防御信号可以通过这种菌根菌丝网络进行交换。在这里，我们表明，CMNs介导健康的植物和病原体感染的番茄植物（番茄工厂）之间的植物-植物通信。在用丛枝菌根真菌Glomus mosseae在番茄植株间建立CMN后，接种病原体早疫病链格孢菌（Alternaria solani）的“供体”植株导致健康邻近“受体”植株的抗病性和推定的防御酶（过氧化物酶、多酚氧化酶、几丁质酶、β-1，3-葡聚糖酶、苯丙氨酸解氨酶和脂氧合酶）的活性增加。当CMN连接受到A.索拉尼这一发现表明，CMN可能作为一种植物与植物的地下通讯管道，使抗病性和诱导的防御信号可以在健康和病原体感染的相邻植物之间传递，这表明植物可以通过CMN“窃听”来自病原体挑战的邻居的防御信号，以激活防御，然后再受到攻击。
Plants can defend themselves to pathogen and herbivore attack by responding to chemical signals that are emitted by attacked plants. It is well established that such signals can be transferred through the air. In theory, plants can also communicate with each other through underground common mycorrhizal networks (CMNs) that interconnect roots of multiple plants. However, until now research focused on plant-to-plant carbon nutrient movement and there is no evidence that defense signals can be exchanged through such mycorrhizal hyphal networks. Here, we show that CMNs mediate plant-plant communication between healthy plants and pathogen-infected tomato plants (Lycopersicon esculentum Mill.). After establishment of CMNs with the arbuscular mycorrhizal fungus Glomus mosseae between tomato plants, inoculation of ‘donor’ plants with the pathogen Alternaria solani led to increases in disease resistance and activities of the putative defensive enzymes, peroxidase, polyphenol oxidase, chitinase, β-1,3-glucanase, phenylalanine ammonia-lyase and lipoxygenase in healthy neighbouring ‘receiver’ plants. The uninfected ‘receiver’ plants also activated six defence-related genes when CMNs connected ‘donor’ plants challenged with A. solani. This finding indicates that CMNs may function as a plant-plant underground communication conduit whereby disease resistance and induced defence signals can be transferred between the healthy and pathogen-infected neighbouring plants, suggesting that plants can ‘eavesdrop’ on defence signals from the pathogen-challenged neighbours through CMNs to activate defences before being attacked themselves.