Utsumi Shunsuke, Ando Yoshino, Ohgushi Takayuki
Center for Ecological Research, Kyoto University, Otsu, Shiga 520-2113, Japan.
Ecol Lett. 2009 Sep;12(9):920-9. doi: 10.1111/j.1461-0248.2009.01349.x. Epub 2009 Jul 13.
Much attention has been paid to ecology and evolution of damage-induced plant responses. Recently, it has been emphasized that phenotypic plasticity, such as induced plant responses, has the potential to lead to evolutionary changes of interacting partners. Here, we report that induced plant regrowth promotes a locally adaptive feeding preference of a leaf beetle, Plagiodera versicolora. We found that there was among-population variation in the strength of the feeding preference of the leaf beetle for leaf-age types of conspecific host plants. The strength of the preference was positively correlated to leaf production of host plants across populations, and the intensity of induced regrowth was likely to have been responsible for geographic variation in new leaf production. Within one population, we detected a significant additive genetic variance and heritability in the preference for consuming new vs. old leaves. Moreover, the strength of preference was significantly related to egg production depending on the leaf-age types. Thus, allopatric populations can evolutionarily develop different adaptive preference, according to locally distinct patterns of induced host regrowth.
植物损伤诱导反应的生态学和进化已受到广泛关注。最近，人们强调表型可塑性，如植物诱导反应，有可能导致相互作用伙伴的进化变化。在此，我们报告植物诱导再生促进了叶甲（Plagiodera versicolora）的局部适应性取食偏好。我们发现，叶甲对同种寄主植物叶龄类型的取食偏好强度存在种群间差异。偏好强度与各寄主植物种群的叶片产量呈正相关，诱导再生强度可能是新叶产量地理变异的原因。在一个种群内，我们检测到对新叶与老叶的取食偏好存在显著的加性遗传方差和遗传力。此外，根据叶龄类型，偏好强度与产卵量显著相关。因此，异域种群可以根据局部不同的寄主诱导再生模式在进化上发展出不同的适应性偏好。
