ArticleScience China. Life sciences2026
A gustatory receptor mediates sucrose detection to enhance moth reproductive fitness.
Article in Science China. Life sciences, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The mutualism between pollinators and flowering plants is a fundamental interaction in ecosystems, mediated by nectar rewards. Sucrose, a major component of floral nectar, is a key driver of pollinator foraging, yet the sensory mechanisms underlying sucrose detection are poorly defined. Here we demonstrate that the pollinator Mythimna separata exhibits a strong sex-independent preference for sucrose, which directly enhances reproductive fitness. We identify MsepGR5, a gustatory receptor expressed in antennal sensilla chaetica, as a key receptor mediating sucrose detection. Crucially, genetic ablation of MsepGR5 completely abolishes both sucrose-evoked neural responses and feeding behavior. Our findings uncover a dedicated gustatory pathway for sucrose detection and establish its critical role in reproductive success in M. separata.
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