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首页> 外文期刊>Proceedings of the National Academy of Sciences of the United States of America >Synchronous coadaptation in an ancient case of herbivory
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Synchronous coadaptation in an ancient case of herbivory

机译：古代食草动物的同步共适应

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Coevolution has long been considered a major force leading to the adaptive radiation and diversification of insects and plants. A fundamental aspect of coevolution is that adaptations and coun-teradaptations interlace in time. A discordant origin of traits long before or after the origin of the putative coevolutionary selective pressure must be attributed to other evolutionary processes. Despite the importance of this distinction to our understanding of coevolution, the macroevolutionary tempo of innovation in plant defenses and insect counterdefenses has not been documented. Molecular clocks for a lineage of chrysomelid beetles of the genus Blepharida and their Burseraceae hosts were independently calibrated. Results show that these plants' defenses and the insect's counterdefensive feeding traits evolved roughly in synchrony, providing macroevolutionary confirmation of synchronous plant-herbivore coadaptation. The association between these two groups of organisms was determined to be about 112 million years old, the oldest age so far for a specialized plant-herbivore association.
机译：长期以来，共同进化一直被认为是导致昆虫和植物的适应性辐射和多样化的主要力量。协同进化的一个基本方面是适应和同居适应在时间上交织在一起。必须在推定的协同进化选择压力的起源之前或之后很久才出现特征不一致的起源，这归因于其他进化过程。尽管这种区别对我们对协同进化的理解非常重要，但尚未记录到植物防御和昆虫防御方面创新的宏观进化速度。 Blepharida属和其Burseraceae宿主的金龟子甲虫谱系的分子钟已独立校准。结果表明，这些植物的防御和昆虫的反防御性饲养特性大致同步地进化，为同步的植物-草食动物协同适应提供了宏观进化的证实。这两组生物之间的关联被确定为大约1.12亿年，这是迄今为止专门的植物-草食动物协会的最古老年龄。

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