Folivory has long-term effects on sexual but not on asexual reproduction in woodland strawberry

1. Plant fitness is often a result of both sexual and asexual reproductive success and, in perennial plants, over several years. Folivory can affect both modes of reproduction. However, little is known about the effects of folivory on resource allocation to the two modes of reproduction simultaneously and across years. 2. In a two-year common garden experiment we examined the effects of different levels of folivory by the strawberry leaf beetle, Galerucella tenella, on current growth, as well as current and future sexual and asexual reproduction (runners) of perennial woodland strawberry, Fragaria vesca. In addition, we measured the chlorophyll content in leaves in the year of experimental damage to determine whether there was increased photosynthetic activity, and, thus, a compensatory response to herbivory. 3. In the year of experimental damage, plants that were exposed to moderate and high levels of folivory (25% and 50 % leaf area consumed, respectively) increased their photosynthet...1. 植物适合度 (plant fitness) 通常由有性生殖与无性生殖的成功共同决定，对于多年生植物而言，这一过程往往跨越多个年度。叶片取食 (folivory) 可对两种生殖模式均产生影响，但目前学界对叶片取食如何同时影响两种生殖模式的资源分配，且这种影响跨年度变化的相关研究仍较为匮乏。 2. 本研究依托一项为期两年的同质园实验 (common garden experiment)，探究了草莓叶甲 (Galerucella tenella) 造成的不同强度叶片取食对多年生森林草莓 (Fragaria vesca) 的当前生长量，以及当前与未来的有性生殖和以匍匐茎 (runners) 为繁殖结构的无性生殖的影响。此外，本研究在实验施加损伤的当年测定了叶片的叶绿素含量，以判断植株是否出现光合活性提升的现象，进而对植食危害产生补偿反应 (compensatory response)。 3. 在实验施加损伤的当年，经受中等及高强度叶片取食（分别为25%和50%叶面积被取食）的植株，其光合活性有所提升……