Plant chemistry underlies herbivore-mediated inbreeding depression in nature
Plant chemistry underlies herbivore-mediated inbreeding depression in nature
复制标题
DOI：
10.1111/ele.12036
复制
发表时间：
2013-02-01
期刊：
影响因子：
8.8
通讯作者：
Kessler, Andre
中科院分区：
文献类型：
--
作者：
Campbell, Stuart A.;Thaler, Jennifer S.;Kessler, Andre
近亲繁殖的代价（近交衰退，ID）是维持繁殖变异的一个重要变量。生态相互作用，如草食动物可以调节这种成本，只要防御性状港口有害突变和草食动物是负责健身的差异。在该领域，我们操纵的存在下，食草动物的实验近交和异交植物的Solanum carolinense（horsenettle）的三年。损害是更大的近交系植物，ID的生长和健身下草食动物显着更大。近亲繁殖在定性（植物化学多样性）和定量上都减少了酚类表达，这表明与防御化合物生物合成相关的基因座上存在有害负荷。我们的研究结果表明，近亲繁殖对食草动物相互作用的影响是由功能性植物代谢产物的变化介导的，这表明近亲繁殖的变化可能是防御性状变异的预测因子。草食动物介导的生态ID的大小表明，草食动物可以维持异交交配系统在自然界中。
The cost of inbreeding (inbreeding depression, ID) is an important variable in the maintenance of reproductive variation. Ecological interactions such as herbivory could modulate this cost, provided that defence traits harbour deleterious mutations and herbivores are responsible for differences in fitness. In the field, we manipulated the presence of herbivores on experimentally inbred and outcrossed plants of Solanum carolinense (horsenettle) for three-years. Damage was greater on inbred plants, and ID for growth and fitness was significantly greater under herbivory. Inbreeding reduced phenolic expression both qualitatively (phytochemical diversity) and quantitatively, indicating deleterious load at loci related to the biosynthesis of defence compounds. Our results indicate that inbreeding effects on plantherbivore interactions are mediated by changes to functional plant metabolites, suggesting that variation in inbreeding could be a predictor of defence trait variation. The magnitude of herbivore-mediated, ecological ID indicates that herbivores could maintain outcrossing mating systems in nature.