Functional synchronization of biological rhythms in a tritrophic system.
Functional synchronization of biological rhythms in a tritrophic system.
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DOI：
10.1371/journal.pone.0011064
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发表时间：
2010-06-10
期刊：
影响因子：
3.7
通讯作者：
Kang L
中科院分区：
文献类型：
--
作者：
Zhang S;Wei J;Guo X;Liu TX;Kang L
在一个由植物、食草动物和天敌组成的三重营养系统中，每一个组成部分都有自己的生物节律。然而，这三个层次之间的节奏相关性和潜在的机制在任何三营养系统在很大程度上是未知的。在这里，我们报告的节奏表现出双向的相关性，在一个模型的三营养系统，涉及利马豆，豌豆潜叶蝇和寄生蜂。从自下而上的角度来看，节奏开始从草食动物的喂养，这触发了挥发性物质的排放节奏，然后寄生蜂活动的节奏模式受到影响，这些节奏是同步的光开关信号。只有在光照条件下，挥发物浓度的增加才能增强寄生蜂的移动和产卵强度。从自上而下的角度来看，未取食和产卵的拟寄生蜂都能利用受害植株不同的挥发节律信息来定位寄主潜叶蝇。我们的研究结果表明，在自然光-暗光周期下，该系统中的三个相互作用的生物体可以实现节律性的功能同步，而不是在恒定的光照或黑暗下。这些发现为三个关键参与者的节奏同步提供了新的见解，这些参与者有助于利用光和化学信号，我们的研究结果可能被用作操纵天敌的潜在方法。
In a tritrophic system formed by a plant, an herbivore and a natural enemy, each component has its own biological rhythm. However, the rhythm correlations among the three levels and the underlying mechanisms in any tritrophic system are largely unknown. Here, we report that the rhythms exhibited bidirectional correlations in a model tritrophic system involving a lima bean, a pea leafminer and a parasitoid. From the bottom-up perspective, the rhythm was initiated from herbivore feeding, which triggered the rhythms of volatile emissions; then the rhythmic pattern of parasitoid activities was affected, and these rhythms were synchronized by a light switch signal. Increased volatile concentration can enhance the intensity of parasitoid locomotion and oviposition only under light. From the top-down perspective, naive and oviposition-experienced parasitoids were able to utilize the different volatile rhythm information from the damaged plant to locate host leafminers respectively. Our results indicated that the three interacting organisms in this system can achieve rhythmic functional synchronization under a natural light-dark photoperiod, but not under constant light or darkness. These findings provide new insight into the rhythm synchronization of three key players that contribute to the utilization of light and chemical signals, and our results may be used as potential approaches for manipulating natural enemies.
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影响因子：
2.5
作者：
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通讯作者：
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