PanzutoMauffetteAlbert2002

Référence

Panzuto, M., Mauffette, Y., Albert, P.J. (2002) Developmental, gustatory, and behavioral responses of leafroller larvae, Choristoneura rosaceana, to tannic acid and glucose. Journal of Chemical Ecology, 28(1):145-160.

Résumé

Soluble sugars are essential nutrients generally perceived as phagostimulants to most insects studied. However, tannins are known as digestibility reducers, hence deleterious to caterpillar development, and as deterrents as well. Previous work demonstrated that larvae of the polyphagous oblique-banded leafroller, Choristoneura rosaceana, performed better when reared on a control + 0.5% tannic acid diet than on the standard control diet and that larvae reared on a control + 5% glucose diet had slower development and reduced survival. This study was designed to elucidate the behavioral and neurophysiological components of the larval responses to tannic acid and glucose. C. rosaceana larvae were reared individually from the first to the sixth instar on one of four different artificial diets: (1) control; (2) control + 5% glucose; (3) control + 0.5% tannic acid; (4) control + 5% glucose + 0.5% tannic acid. After 14 days, larvae reared on the control + 5% glucose diet had not developed past the fourth instar, whereas a considerable proportion of larvae reared on the control + 0.5% tannic acid diet had already attained the pupal stage. Insects reared on the control or the control + 5% glucose + 0.5% tannic acid diet had intermediate development, with most larvae in the fifth instar. In addition, once the mid-sixth instar was reached, the feeding preferences to 25 and 300 mM glucose, 25 mM tannic acid, and 25 mM glucose + 25 mM tannic acid over water were assessed in two-choice tests. Feeding affected preference. Control-reared insects preferred feeding on treatments containing glucose and were not deterred by tannic acid. However, larvae that had been exposed to tannic acid during their development were deterred by tannic acid and their glucose discrimination was impaired. The sensitivity to glucose was also examined from neurophysiological recordings by stimulating the sugar-sensitive cell (cell 1) on the lateral styloconic sensillum of the maxillary galea with increasing concentrations of glucose (1, 10, 25, 50, 100, 200, 300, and 500 mM). We also determined whether tannic acid was phagostimulatory, since insects develop relatively quickly on a diet containing this compound, by testing 1 mM tannic acid, 1 mM tannic acid + 300 mM glucose, and 300 mM glucose on the lateral styloconic sensilla. The traces indicated that 1 mM tannic acid was not detected by any of the four chemosensory cells in these sensilla. The combination of tannic acid and glucose produced no spikes from the sugar-sensitive cell, whereas a prominent spike activity resulted with 300 mM glucose. We concluded that, although C. rosaceana larvae develop faster on a tannic acid diet, this compound is not a phagostimulant. The converse is true for glucose; i.e., it stimulates the sugar-sensitive cell in the lateral styloconica in a concentration-dependent fashion. Previous dietary experience changes the sensory and behavioral responses of C. rosaceana to glucose. Our findings imply that not all compounds that are phagostimulatory are necessarily beneficial to an insect's fitness. Therefore, developmental studies should be interpreted in conjunction with behavioral and physiological data.

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@ARTICLE { PanzutoMauffetteAlbert2002,
    AUTHOR = { Panzuto, M. and Mauffette, Y. and Albert, P.J. },
    TITLE = { Developmental, gustatory, and behavioral responses of leafroller larvae, Choristoneura rosaceana, to tannic acid and glucose },
    JOURNAL = { Journal of Chemical Ecology },
    YEAR = { 2002 },
    VOLUME = { 28 },
    PAGES = { 145-160 },
    NUMBER = { 1 },
    NOTE = { 00980331 (ISSN) Cited By (since 1996): 6 Export Date: 25 April 2007 Source: Scopus CODEN: JCECD doi: 10.1023/A:1013571020783 Language of Original Document: English Correspondence Address: Albert, P.J.; Department of Biology; Concordia University; 1455 De Maisonneuve Blvd W. Montre?al, Que. H3G 1M8, Canada; email: albert@alcor.concordia.ca Chemicals/CAS: glucose, 50-99-7, 84778-64-3; tannin, 1401-55-4; Glucose, 50-99-7; Tannic Acid References: Albert, P.J., Bauce, E., Feeding preferences of fourth- and sixth-instar spruce budworm (Lepidoptera: Tortricidae) larvae for foliage extracts from young and old balsam fir hosts (1994) Environ. Entomol., 23, pp. 645-653; Albert, P.J., Parisella, S., Physiology of a sucrose-sensitive cell on the galea of the eastern spruce budworm larvae, Choristoneura fumiferana (1988) Physiol. Entomol., 13, pp. 243-247; Albert, P.J., Cearley, C., Hanson, F.E., Parisella, S., Behavioral responses of eastern spruce budworm larvae to sucrose and other carbohydrates (1982) J. Chem. Ecol., 8, pp. 233-239; Ayres, M.P., Clausen, T.P., MacLean Jr., S.F., Redman, A.M., Reichardt, P.B., Diversity of structure and antiherbivore activity in condensed tannins (1997) Ecology, 78, pp. 1696-1712; Bennet, S.E., Tannic acid as a repellent and toxicant to alfalfa weevil larvae (1965) J. Econ. Entomol., 58, p. 372; Bernays, E.A., Tannins: An alternative view-point (1978) Entomol. Exp. Appl., 24, pp. 244-253; Bernays, E.A., Plant tannins and insect herbivores: An appraisal (1981) Ecol. Entomol., 6, pp. 353-360; Bernays, E.A., Host range in phytophagous insects: The potential role of generalist predators (1989) Evol. Ecol., 3, pp. 299-312; Bernays, E.A., Chamberlain, D.J., A study of tolerance of ingested tannin in Schistocerca gregaria (1980) J. 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Res., 64, pp. 339-363; Chapman, P.J., Lienk, S.E., (1971) Tortricid fauna of apple in New York; including an account of apple's occurrence in the state, especially as a naturalized plant, , N.Y. State Agric. Exp. Stn. (Geneva, NY) Spec. Publ. 142 pp; Clancy, K.M., The role of sugars in western spruce budworm nutritional ecology (1992) Ecol. Entomol., 17, pp. 189-197; Dauphinais, N., (1998) Effets de la tempe?rature et de la qualite? nutritionnelle sur la performance de la tordeuse a? bandes obliques (Choristoneura rosaceana), , MSc thesis. UQAM, Montre?al, Que?bec, Canada, 102 pp; Denno, R.F., McClure, M.S., (1983) Variable Plants and Herbivores in Natural and Managed Systems, , Academic Press, San Diego, California, 185 pp; Dethier, V.G., Electrophysiological studies of gustation in lepidopterous larvae. II. Taste spectra in relation to food-plant discrimination (1973) J. Comp. Physiol., 82, pp. 103-134; Dethier, V.G., Mechanism of host-plant recognition (1982) Entomol. Exp. 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Appl., 82, pp. 335-340; Rhoades, D.F., Evolution of plant chemical defence against herbivores (1979) Herbivores: Their Interactions with Secondary Plant Metabolites, pp. 3-54. , G. A. Rosenthal and D. H. Janzen (eds.). Academic Press, New York; Rhoades, D.F., Cates, R.G., Toward a general theory of plant antiherbivore chemistry (1976) Recent Adv. Phytochem., 10, pp. 168-213; Savoupoulou-Soultani, M., Stavridis, D.G., Vassiliou, A., Stafilidis, J.E., Iraklidis, I., Responses of Lobesia botrana (Lepidoptera: Tortricidae) to levels of sugars and protein in artificial diets (1994) J. Econ. Entomol., 87, pp. 84-90; Schnuch, M., Hansen, K., Sugar reception by the salt receptor of the taste hairs of the fly Protophormia terraenovae (1989) Proceedings, 17th Gottingen Neurobiology Conference, pp. 1-7. , N. Elsner and W. Singer (eds.). Dynamics and Plasticity in Neuronal Systems. 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    ABSTRACT = { Soluble sugars are essential nutrients generally perceived as phagostimulants to most insects studied. However, tannins are known as digestibility reducers, hence deleterious to caterpillar development, and as deterrents as well. Previous work demonstrated that larvae of the polyphagous oblique-banded leafroller, Choristoneura rosaceana, performed better when reared on a control + 0.5% tannic acid diet than on the standard control diet and that larvae reared on a control + 5% glucose diet had slower development and reduced survival. This study was designed to elucidate the behavioral and neurophysiological components of the larval responses to tannic acid and glucose. C. rosaceana larvae were reared individually from the first to the sixth instar on one of four different artificial diets: (1) control; (2) control + 5% glucose; (3) control + 0.5% tannic acid; (4) control + 5% glucose + 0.5% tannic acid. After 14 days, larvae reared on the control + 5% glucose diet had not developed past the fourth instar, whereas a considerable proportion of larvae reared on the control + 0.5% tannic acid diet had already attained the pupal stage. Insects reared on the control or the control + 5% glucose + 0.5% tannic acid diet had intermediate development, with most larvae in the fifth instar. In addition, once the mid-sixth instar was reached, the feeding preferences to 25 and 300 mM glucose, 25 mM tannic acid, and 25 mM glucose + 25 mM tannic acid over water were assessed in two-choice tests. Feeding affected preference. Control-reared insects preferred feeding on treatments containing glucose and were not deterred by tannic acid. However, larvae that had been exposed to tannic acid during their development were deterred by tannic acid and their glucose discrimination was impaired. The sensitivity to glucose was also examined from neurophysiological recordings by stimulating the sugar-sensitive cell (cell 1) on the lateral styloconic sensillum of the maxillary galea with increasing concentrations of glucose (1, 10, 25, 50, 100, 200, 300, and 500 mM). We also determined whether tannic acid was phagostimulatory, since insects develop relatively quickly on a diet containing this compound, by testing 1 mM tannic acid, 1 mM tannic acid + 300 mM glucose, and 300 mM glucose on the lateral styloconic sensilla. The traces indicated that 1 mM tannic acid was not detected by any of the four chemosensory cells in these sensilla. The combination of tannic acid and glucose produced no spikes from the sugar-sensitive cell, whereas a prominent spike activity resulted with 300 mM glucose. We concluded that, although C. rosaceana larvae develop faster on a tannic acid diet, this compound is not a phagostimulant. The converse is true for glucose; i.e., it stimulates the sugar-sensitive cell in the lateral styloconica in a concentration-dependent fashion. Previous dietary experience changes the sensory and behavioral responses of C. rosaceana to glucose. Our findings imply that not all compounds that are phagostimulatory are necessarily beneficial to an insect's fitness. Therefore, developmental studies should be interpreted in conjunction with behavioral and physiological data. },
    KEYWORDS = { Chemoreception Dose-response Electrophysiology Feeding preference Glucose Induction Lateral styloconic sensillum Oblique-banded leafroller Rearing diets Tannic acid glucose tannin behavioral response chemical ecology glucose insect organic acid physiological response animal behavior feeding behavior insect larva moth Choristoneura rosaceana Lepidoptera Tortricidae },
    OWNER = { brugerolles },
    TIMESTAMP = { 2007.12.05 },
}

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