Transgenerational plasticity in the eye size of Daphnia
Transgenerational plasticity in the eye size of Daphnia
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DOI：
10.1098/rsbl.2021.0143
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发表时间：
2021-06
期刊：
影响因子：
3.3
通讯作者：
M. Walsh;M. Gillis
中科院分区：
文献类型：
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作者：
M. Walsh;M. Gillis
众所周知，环境信号可以诱导持续多代的表型反应。这种“跨代可塑性”（TGP）的诱导取决于生物体准确接收和处理环境信号信息的能力。因此，感觉系统可能与三峡工程交织在一起。在这里，我们测试了环境压力源与感觉系统（眼睛大小）中跨代反应之间的联系，该系统与增强的视力和生态相关行为有关。我们饲养了45个克隆蚤pulicaria在存在和不存在的低质量的资源（蓝藻），并评估了后代的相对眼睛大小的变化。我们的研究结果揭示了不同的变化，相对眼睛大小内和跨代。喂食蓝藻的母体水蚤比喂食高质量藻类的水蚤产生更小的眼睛。这种差异在后代中被逆转了;母体被喂食蓝藻的水蚤比持续喂食绿色藻类的水蚤长出了更大的眼睛。我们讨论了在何种程度上，这种母亲的眼睛大小的影响是一种适应性反应，改善觅食。
It is well established that environmental signals can induce phenotypic responses that persist for multiple generations. The induction of such ‘transgenerational plasticity’ (TGP) depends upon the ability of organisms to accurately receive and process information from environmental signals. Thus, sensory systems are likely intertwined with TGP. Here we tested the link between an environmental stressor and transgenerational responses in a component of the sensory system (eye size) that is linked to enhanced vision and ecologically relevant behaviours. We reared 45 clones of Daphnia pulicaria in the presence and absence of a low-quality resource (cyanobacteria) and evaluated shifts in relative eye size in offspring. Our results revealed divergent shifts in relative eye size within- and across-generations. Parental Daphnia that were fed cyanobacteria produced a smaller eye than Daphnia fed high-quality algae. Such differences were then reversed in the offspring generation; Daphnia whose mothers were fed cyanobacteria produced larger eyes than Daphnia that were continually fed green algae. We discuss the extent to which this maternal effect on eye size is an adaptive response linked to improved foraging.