A Role for Volatiles in Intra- and Inter-Plant Interactions in Birch
A Role for Volatiles in Intra- and Inter-Plant Interactions in Birch
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DOI：
10.1007/s10886-014-0514-1
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发表时间：
2014-12-01
影响因子：
2.3
通讯作者：
Blande, James D.
中科院分区：
文献类型：
--
作者：
Giron-Calva, P. Sarai;Li, Tao;Blande, James D.
1985年，人们在白桦林中首次观察到，在自然条件下，植物可能会利用受损邻居释放的线索。然而，观察的机制尚未确定，桦树（桦木属）。作为植物间相互作用的研究体系，一直被忽视。在一系列木本和草本植物物种中，由营养植物部分响应于草食动物损害而释放的挥发物作为植物与植物相互作用的信号起着重要作用，并且还已被证明介导具有有限维管连接的同一植物的分支之间的信号传导。我们建立了温室实验来评估：1）暴露于来自食草动物破坏的桦树的植物挥发物是否会引发未受损邻居的防御反应; 2）防御是否也会引发相同植物的未受损部分，这些部分具有有限的血管连接。我们观察到引发的防御反应，这表现在萜烯和芳香族化合物在未受损的同种邻居的排放量增加，也增加排放的绿色叶挥发物在系统分支。我们的工作提供了强有力的证据，植物间的信号通过挥发物，植物内的系统反应在桦树。然而，响应是特定的，与典型的启动响应的不同群体的植物挥发物的排放。这项工作补充和扩展了以前的工作进行了自然人口的桦树。
One of the first observations that plants might utilize cues released by damaged neighbors under natural conditions was made in birch forests in 1985. However, the mechanisms underlying the observations were not determined, and birch (Betula spp.) has been neglected as a study system for inter-plant interaction ever since. Volatiles released by vegetative plant parts in response to herbivore damage play important roles as signals in plant-to-plant interactions in a range of woody and herbaceous plant species, and also have been shown to mediate signaling between branches of the same plant that have limited vascular connection. We established greenhouse experiments to assess: 1) whether exposure to plant volatiles from herbivore-damaged birches primes defense responses in undamaged neighbors; and 2) whether defenses also are primed in undamaged parts of the same plants with limited vascular connection. We observed a priming of defense responses, which were manifested in an augmented emission of terpenes and aromatic compounds in undamaged conspecific neighbors, and also an augmented emission of green leaf volatiles in systemic branches. Our work provides strong evidence of inter-plant signaling by volatiles, and an intra-plant systemic response in birch. However, the responses are specific, with emissions of different groups of plant volatiles typifying the primed response. This work complements and extends the previous work conducted with a natural population of birches.