Abstract
The interaction between the moth, Cactoblastis cactorum, and the cactus, Opuntia stricta, is used as a model to examine the question of whether the CO2 sense of a herbivorous insect can detect the CO2 gradients associated with a plant's metabolic activity. Both the anatomical and the electrophysiological characteristics of CO2-sensitive receptor neurons in C. cactorum indicate an adaptation to the detection of small fluctuations around the atmospheric background. Evidence is provided that further rises in background will impair the function of the sensory organ. In the habitat of the plant, during the diurnal window of the moth's activity, two types of CO2 gradients occur that are detectable by the moth's sensors. The first gradient, associated with soil respiration, is vertical and extends from the soil surface to an altitude of approximately 1 m. Its magnitude is well above the detectability limit of the sensors. The notion that this gradient provides, to a flying insect, a cue for the maintenance of a flight altitude favourable for host detection is supported by field observations of behaviour. The second gradient, associated with CO2 fixation by the plant, extends from the surfaces of photosynthetic organs (cladodes) over a boundary layer distance of approximately 5 mm. Again, its magnitude is well above the detectability limit. The notion that this gradient provides, to a walking insect, a cue to the physiological condition of the plant is supported by the observation that females of C. cactorum, prior to oviposition, actively probe the plant surface with their CO2 sensors. In a simulation of probing, pronounced responses of the sensors to the CO2-fixing capacity of O. stricta are observed. We propose that by probing the boundary layer, females of C. cactorum can detect the healthiest, most active O. stricta cladodes, accounting for earlier observations that the most vigorous plants attract the greatest density of egg sticks.
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References
Barrer PM, Jay EG (1980) Laboratory observations on the ability of Ephestia cautella (Walker) (Lepidoptera: Phycitidae) to locate, and to oviposit in response to a source of grain odour. J Stored Prod Res 16:1–7
Bogner F (1990) Sensory physiological investigation of carbon dioxide receptors in Lepidoptera. J Insect Physiol 36:951–957
Bogner F, Bopprè M, Ernst K-D, Boeckh J (1986) CO2-sensitive receptors on labial palps of Rhodogastria moths (Lepidoptera: Arctiidae): physiology, fine structure and projection. J Comp Physiol A 158:741–749
Bowen MF (1991) The sensory physiology of host-seeking behavior in mosquitoes. Annu Rev Entomol 36:139–158
Den Otter CJ, Van der Goes van Naters WM (1992) Single cell recordings from tsetse (Glossina m. morsitans) antennae reveal olfactory, mechano-and cold receptors. Physiol Entomol 17:33–42
Dodd AP (1940) The biological campaign against prickly-pear. Queensland Government Printer, Brisbane
Eyer JR, Medler JT (1940) Attractiveness to codling moth of substances related to those elaborated by heterofermentative bacteria in baits. J Econ Entomol 33:933–940
Faucheux MJ (1991) Morphology and distribution of sensilla on the cephalic appendages, tarsi and ovipositor of the European sunflower moth, Homoeosoma nebulella Den. & Schiff. (Lepidoptera: Pyralidae). Int J Insect Morphol Embryol 20:291–307
Faucheux MJ, Chauvin G (1980) Les pieces buccales des adultes de cinq lepidopteres tineides keratophages communs dans l'ouest de la France. II. Les recepteurs sensoriels des palpes labiaux. Bull Soc Sci Nat Ouest Fr 2:4–15
Fuller HJ (1948) Carbon dioxide concentrations of the atmosphere above Illinois forest and grassland. Am Midl Nat 39:247–249
Halliburton R (1993) The great Australian blight: ecological invasion and biological control in Australia. Conn Rev 15:1–10
Gillies MT (1980) The role of carbon dioxide in host-finding by mosquitoes (Diptera: Culicidae): a review. Bull Ent Res 70:525–532
Kaissling KE (1987) R. H. Wright lectures on insect olfaction. Simon Fraser University, Burnaby, B.C.
Keil TA (1984) Reconstruction and morphometry of silkmoth olfactory hairs: a comparative study of sensilla trichodea on the antennae of male Antheraea polyphemus and Antheraea pernyi (Insecta: Lepidoptera). Zoomorphology 104:147–156
Kent KS, Harrow ID, Quartararo P, Hildebrand JG (1986) An accessory olfactory pathway in Lepidoptera: the labial pit organ and its central projections in Manduca sexta and certain other sphinx moths and silk moths. Cell Tissue Res 245:237–245
Klingler J (1966) Über den Sitz der CO2-Rezeptoren bei der Larve von Otiorrhynchus sulcatus. Ent Exp Appl 9:271–277
Lacher V (1964) Elektrophysiologische Untersuchungen an einzelnen Rezeptoren für Geruch, Kohlendioxyd, Luftfeuchtigkeit und Temperatur auf den Antennen der Arbeitsbiene und Drohne (Apis mellifera L.). Z Vergl Physiol 48:587–623
Lee J-K, Selzer R, Altner H (1985) Lamellated outer dendritic segments of a chemoreceptor within wall-pore sensilla in the labial palp-pit organ of the butterfly, Pieris rapae L. (Insecta, Lepidoptera). Cell Tissue Res 240:333–342
Lenschow DH, Raupach MR (1991) The attenuation of fluctuations in scalar concentrations through sampling tubes. J Geophys Res 96:15259–15268
Monro JM (1975) Environmental variation and the efficiency of biological control-Cactoblastis in the southern hemisphere. In: Kikkowa J, Nix HA (eds) Managing terrestrial ecosystems. 9. Proc Ecol Soc Aust, pp 204–215
Murray ND (1982) Ecology and evolution of the Opuntia-Cactoblastis ecosystem in Australia. In: Barker JSF, Starmer WT (eds) Ecological genetics and evolution. Academic Press, Sydney, pp 7–30
Myers JH, Monro J, Murray ND (1981) Egg clumping, host plant selection and population regulation in Cactoblastis cactorum. Oecologia 51:7–13
Nobel PS (1974) Introduction to biophysical plant physiology. Freeman, San Francisco
Osmond CB, Nott DL, Firth PM (1979) Carbon assimilation patterns and growth of the introduce CAM plant Opuntia inermis in eastern Australia. Oecologia 40:331–350
Osmond CB, Monro JM (1981) Prickly pear. In: Carr DJ, Carr SGM (eds) Plants and man in Australia. Academic Press, Sydney, pp 194–222
Paim U, Beckel WE (1964a) The carbon dioxide related behavior of the adults of Orthosoma brunneum (Forster) (Coleoptera: Cerambycidae). Can J Zool 42:295–303
Paim U, Beckel WE (1964b) The behaviour of the larvae of Orthosoma brunneum (Forster) (Coleoptera: Cerambycidae) in relation to gases found in the logs inhabited by the larvae. Can J Zool 42:327–353
Rasch C, Rembold H (1994) Carbon-dioxide—highly attractive signal for larvae of Helicoverpa armigera. Naturwiss 81:228–229
Seeley TD (1974) Atmospheric carbon dioxide regulation in honeybee colonies. J Insect Physiol 20:2301–2305
Stange G (1992) High resolution measurement of atmospheric carbon dioxide concentration changes by the labial palp organ of the moth Heliothis armigera (Lepidoptera: Noctuidae). J Comp Physiol A 171:317–324
Stange G, Wong C (1993) Moth response to climate. Nature 365:699
Stange G, Osmond CB, Stowe S (1992) Carbon dioxide receptors in moths as high resolution sensors of the metabolic performance of food plants. Chem Senses 17:881
Steullet P, Guerin PM (1992) Perception of breath components in the tropical bont tick, Amblyomma variegatum Fabricius (Ixodidae). I. CO2-excited and CO2-inhibited receptors. J Comp Physiol A 170:665–676
Tanaka K, Iino A (1974) Critical point drying method using dry ice. Stain Technol 49:203–206
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Stange, G., Monro, J., Stowe, S. et al. The CO2 sense of the moth Cactoblastis cactorum and its probable role in the biological control of the CAM plant Opuntia stricta . Oecologia 102, 341–352 (1995). https://doi.org/10.1007/BF00329801
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DOI: https://doi.org/10.1007/BF00329801