caa a22 4500 46909690X CHVBK 20180323133033.0 cr unu---uuuuu 170328e19920301xx s 000 0 eng 10.1007/BF00317425 doi (NATIONALLICENCE)springer-10.1007/BF00317425 The effect of dietary nicotine on the allocation of assimilated food to energy metabolism and growth in fourth-instar larvae of the southern armyworm, Spodoptera eridania (Lepidoptera: Noctuidae) [Elektronische Daten] [James Cresswell, Stewart Merritt, Michael Martin] Summary: Dietary nicotine (0.5%), which is a substrate of the PSMO (polysubstrate monooxygenase) detoxification system in the southern armyworm Spodoptera eridania, has significant negative effects on the weight of food ingested, weight gained, relative growth rate (RGR), and efficiency of conversion of digested food (ECD) by fourthinstar S. eridania larvae on a nutrient-rich artificial diet. It has a significant positive effect on the weight of food respired by the larvae. Thus, the detoxification of nicotine by the PSMO system exacts a fitness cost and imposes a metabolic cost on S. eridania larvae. In contrast, dietary α-(+)-pinene, an inducer of the PSMO system, neither exacts a fitness cost nor imposes a metabolic cost on the larvae. We believe this to be the first study to demonstrate unequivocally that the negative effect of a dietary toxin on net growth efficiency (ECD) in an insect herbivore is due to an increase in the allocation of assimilated food to energy metabolism and not to a decrease in the amount of food assimilated. This study, therefore, supports the hypothesis that detoxification can impose a significant metabolic load on an insect herbivore. Implications of a corroboration of the metabolic load hypothesis are discussed. Springer-Verlag, 1992 Spodoptera eridania nationallicence Food utilization nationallicence Detoxification nationallicence Nicotine nationallicence Metabolic cost nationallicence Cresswell James Department of Biology, University of Michigan, 48109-1048, Ann Arbor, MI, USA aut Merritt Stewart Department of Biology, University of Michigan, 48109-1048, Ann Arbor, MI, USA aut Martin Michael Department of Biology, University of Michigan, 48109-1048, Ann Arbor, MI, USA aut Oecologia Springer-Verlag 89/3(1992-03-01), 449-453 0029-8549 89:3<449 1992 89 442 https://doi.org/10.1007/BF00317425 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00317425 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Cresswell James Department of Biology, University of Michigan, 48109-1048, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Merritt Stewart Department of Biology, University of Michigan, 48109-1048, Ann Arbor, MI, USA aut NATIONALLICENCE 700 1- Martin Michael Department of Biology, University of Michigan, 48109-1048, Ann Arbor, MI, USA aut NATIONALLICENCE 773 0- Oecologia Springer-Verlag 89/3(1992-03-01), 449-453 0029-8549 89:3<449 1992 89 442 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer