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Chem. Senses 26: 17-24, 2001
© Oxford University Press 2001

Female Attacus atlas Respond to Pheromones of Antheraea polyphemus: a Comparative Electrophysiological and Biochemical Study

Rosario Maida and Jürgen Ziesmann

Max-Planck Institut für Verhaltensphysiologie, D-82319 Seewiesen, Germany

Correspondence to be sent to: Rosario Maida, Max-Planck Institut für Verhaltensphysiologie, D-82319 Seewiesen, Germany. e-mail: maida{at}mpi-seewiesen.mpg.de

Female Attacus atlas respond electrophysiologically to both of the Antheraea polyphemus pheromone components (E,Z)-6,11-hexadecadienyl acetate and (E,Z)-6,11-hexadecadienal. Moreover, they possess a pheromone-binding protein (PBP) and general odorant-binding proteins (GOBPs), as well as a pheromone-degrading sensillar esterase and aldehyde oxidase enzymes. They show no electroantennogram responses to their own gland extract. In contrast, female A. polyphemus do not respond to their own or to A. atlas pheromone. Male A. atlas do not detect any of the A. polyphemus compounds but only the conspecific female gland extracts. Both male A. atlas and female A. polyphemus possess PBP and GOBP but lack the pheromone-degrading esterases of male Antheraea. The results indicate that the two species use quite distinct classes of chemicals as pheromones. In spite of this, the N-terminal amino acid sequences of the PBPs show homology of 68%.


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