Department of Forest and Wildlife Ecology, University of Wisconsin-Madison, 226 Russell Laboratories, 1630 Linden Drive, Madison, WI, 53706, USA.
Department of Entomology, University of Wisconsin-Madison, 237 Russell Laboratories, 1630 Linden Drive, Madison, WI, 53706, USA.
Oecologia. 2022 May;199(1):119-128. doi: 10.1007/s00442-022-05158-z. Epub 2022 Apr 21.
Patterns of trait expression within some plant species have recently been shown to align with the leaf economics spectrum paradigm. Resistance to herbivores is also expected to covary with leaf economics traits. We selected 36 mature Populus tremuloides genotypes in a common garden to assess whether aspen leaf economics patterns follow those observed among species globally. We also evaluated leaf economics strategies in the context of insect resistance by conducting bioassays to determine the effects of plant traits on preference and performance of Lymantria dispar. We found that: (1) intraspecific trait patterns of P. tremuloides parallel those exhibited by the interspecific leaf economics spectrum, (2) herbivores preferred leaves from genotypes with resource-acquisitive strategies, and (3) herbivores also performed best on genotypes with resource-acquisitive strategies. We conclude that a leaf economics spectrum that incorporates defense traits is a useful tool for explaining intraspecific patterns of variation in plant strategies, including resistance to herbivores.
最近的研究表明，一些植物物种的性状表现模式与叶片经济谱范式一致。对草食动物的抗性也预计与叶片经济特征相关。我们在一个共同的花园中选择了 36 个成熟的颤杨基因型，以评估白杨的叶片经济模式是否遵循全球物种观察到的模式。我们还通过生物测定来评估叶片经济策略在昆虫抗性方面的作用，以确定植物性状对舞毒蛾的偏好和表现的影响。我们发现：（1）P. tremuloides 的种内性状模式与种间叶片经济谱表现出的模式相似，（2）草食动物更喜欢资源获取策略的基因型的叶子，（3）草食动物在资源获取策略的基因型上表现也最好。我们得出结论，包含防御特征的叶片经济谱是解释植物策略，包括对草食动物的抗性的种内变异模式的有用工具。
