2025-04-03 ペンシルベニア州立大学(PennState)
<関連情報>
- https://www.psu.edu/news/research/story/picky-eaters-day-buffet-night-butterfly-moth-diets-sync-plant-aromas
- https://royalsocietypublishing.org/doi/full/10.1098/rspb.2024.2426
顕著なアロマ仮説:鱗翅目における宿主植物の特殊性は植物揮発性の利用可能性と関連している(The Salient Aroma Hypothesis: host plant specialization is linked with plant volatile availability in Lepidoptera)
Po-An Lin,Wei-Ping Chan,Liming Cai,Yun Hsiao,Even Dankowicz,Kadeem J. Gilbert,Naomi E. PierceandGary Felton
Proceedings of the Royal Society B: Biological Sciences Published:12 March 2025
DOI:https://doi.org/10.1098/rspb.2024.2426
Abstract
Host plant use in Lepidoptera has been a primary focus in studies of ecological specialization, and multiple factors are likely to be involved in shaping the evolution of diet breadth. Here, we first describe the Salient Aroma Hypothesis, suggesting that the availability of chemical information, particularly host-associated aromas, plays a critical role in shaping dietary specialization. According to the Salient Aroma Hypothesis, herbivores active during periods when chemical information is abundant, particularly during the daytime hours when plant aromas are hypothesized to be more prevalent, are more likely to evolve specialized diets. First, with meta-analysis, we show that plants release more diverse and abundant volatile compounds during daylight hours, increasing the availability of chemical information. We found that diurnal Lepidoptera tend to have specialized diets, while nocturnal species are more generalized, consistent with the prediction of the Salient Aroma Hypothesis. We further observed that morphological differences in the antennae of female Lepidoptera are correlated with variation in diet breadth and diel activity patterns, indirectly supporting the Salient Aroma Hypothesis. While multiple factors influence host plant specialization, the Salient Aroma Hypothesis offers a useful framework linking chemical information availability (e.g. plant volatiles) and ecological specialization.
