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Olefinic acetates, Δ-9,11-14:OAc and Δ-7,9-12:OAc used as sex pheromone components in three geometrid moths, Idaea aversata, I. straminata, and I. biselata (Geometridae, Lepidoptera)

Zhu, Junwei ; Ryrholm, Nils ; Ljungberg, Håkan LU ; Hansson, Bill S. ; Hall, David ; Reed, Darwin and Löfstedt, Christer LU (1996) In Journal of Chemical Ecology 22(8). p.1505-1526
Abstract

Pheromone compounds so far identified from most geometrid moths consist of all-Z diene, triene, or tetraene hydrocarbons with chain lengths of C17 to C21, and their monoepoxide derivatives biosynthesized from linoleic and linolenic acids. The present study reports the occurrence of olefinic acetates as sex pheromones in three species of Geometridae. (Z,Z)-9,11- tetradecadienyl acetate and (Z,Z)-7,9-dodecadienyl acetate found in female gland extracts of Idaea aversata elicited significant responses from conspecific male antennae in gas chromatography with electroantennographic detection (GC-EAD). In extracts of I. straminata, (Z,E)-7,9-dodecadienyl acetate, (E,Z)-7,9-dodecadienyl acetate, and (Z,Z)-7,9-dodecadienyl... (More)

Pheromone compounds so far identified from most geometrid moths consist of all-Z diene, triene, or tetraene hydrocarbons with chain lengths of C17 to C21, and their monoepoxide derivatives biosynthesized from linoleic and linolenic acids. The present study reports the occurrence of olefinic acetates as sex pheromones in three species of Geometridae. (Z,Z)-9,11- tetradecadienyl acetate and (Z,Z)-7,9-dodecadienyl acetate found in female gland extracts of Idaea aversata elicited significant responses from conspecific male antennae in gas chromatography with electroantennographic detection (GC-EAD). In extracts of I. straminata, (Z,E)-7,9-dodecadienyl acetate, (E,Z)-7,9-dodecadienyl acetate, and (Z,Z)-7,9-dodecadienyl acetate were found, and the synthetic compounds elicited strong responses from conspecific male antennae. In the third species, I. biselata, only (Z,Z)-7,9- dodecadienyl acetate was found in the female extracts, and this compound elicited a strong EAD response from the conspecific male antenna. The identities of the pheromone components in I. aversata and I. straminata were further confirmed according to their characteristic ions after GC-MS analyses. Single sensillum recordings from I. aversata showed two types of pheromone-detecting sensilla present on the male antenna. One type contained two receptor neurons, one of which was specifically tuned to (Z,Z)-9,11- tetradecadienyl acetate, the other to (Z,E)-9,11-tetradecadienyl acetate. A second type contained one neuron responding to (Z,Z)-7,9-dodecadienyl acetate. The two types were clearly different also with respect to external morphology, the former being considerably longer and having a larger base diameter. Also in I. straminata two physiological types of sensilla could be distinguished. One type contained two neurons, one of which responded to (Z,Z)-7,9-dodecadienyl acetate, the other to (Z,E)-9,11-tetradecadienyl acetate. The second type contained one neuron, responding the (Z,Z)-7,9- dodecadienyl acetate. No correlation between external morphology and physiological response of the investigated sensilla was observed in I. straminata. In field tests, a two-component blend containing (Z,Z)-9,11- tetradecadienyl acetate and (Z,Z)-7,9-dodecadienyl acetate in a ratio of 10:1 was attractive to males of I. aversata. This two-component blend was also attractive to males of I. straminata, but in a ratio of 1:1. High numbers of male I. biselata were caught in traps baited with (Z,Z)-7,9-dodecadienyl acetate alone. The incorporation of deuterium labels into pheromone components after topical application of deuterium-labeled palmitic acid confirmed that the pheromone components of I. aversata could be synthesized from this precursor, as has been previously observed for acetate pheromone components of many other moth species. Our results suggest that an evolutionary reversal back to the production of palmitic acid-derived pheromone components has occurred within the geometrid subfamily Sterrhinae.

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keywords
(Z,E)-7,9-dodecadienyl acetate, (Z,Z)-7,9-dodecadienyl acetate, (Z,Z)-9,11- tetradecadienyl acetate, biosynthesis, electroantenography, evolution, Geometridae, Idaea aversata, Idaea biselata, Idaea straminata, Lepidoptera, phylogeny, Sex pheromone, single cell recording
in
Journal of Chemical Ecology
volume
22
issue
8
pages
1505 - 1526
publisher
Springer
external identifiers
  • scopus:0029830813
ISSN
0098-0331
DOI
10.1007/BF02027728
project
Evolutionary mechanisms of pheromone divergence in Lepidoptera
language
English
LU publication?
yes
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acaddb34-75ed-4475-aa53-98d4b18e8f91
date added to LUP
2020-05-26 16:11:33
date last changed
2020-06-08 13:55:42
@article{acaddb34-75ed-4475-aa53-98d4b18e8f91,
  abstract     = {<p>Pheromone compounds so far identified from most geometrid moths consist of all-Z diene, triene, or tetraene hydrocarbons with chain lengths of C<sub>17</sub> to C<sub>21</sub>, and their monoepoxide derivatives biosynthesized from linoleic and linolenic acids. The present study reports the occurrence of olefinic acetates as sex pheromones in three species of Geometridae. (Z,Z)-9,11- tetradecadienyl acetate and (Z,Z)-7,9-dodecadienyl acetate found in female gland extracts of Idaea aversata elicited significant responses from conspecific male antennae in gas chromatography with electroantennographic detection (GC-EAD). In extracts of I. straminata, (Z,E)-7,9-dodecadienyl acetate, (E,Z)-7,9-dodecadienyl acetate, and (Z,Z)-7,9-dodecadienyl acetate were found, and the synthetic compounds elicited strong responses from conspecific male antennae. In the third species, I. biselata, only (Z,Z)-7,9- dodecadienyl acetate was found in the female extracts, and this compound elicited a strong EAD response from the conspecific male antenna. The identities of the pheromone components in I. aversata and I. straminata were further confirmed according to their characteristic ions after GC-MS analyses. Single sensillum recordings from I. aversata showed two types of pheromone-detecting sensilla present on the male antenna. One type contained two receptor neurons, one of which was specifically tuned to (Z,Z)-9,11- tetradecadienyl acetate, the other to (Z,E)-9,11-tetradecadienyl acetate. A second type contained one neuron responding to (Z,Z)-7,9-dodecadienyl acetate. The two types were clearly different also with respect to external morphology, the former being considerably longer and having a larger base diameter. Also in I. straminata two physiological types of sensilla could be distinguished. One type contained two neurons, one of which responded to (Z,Z)-7,9-dodecadienyl acetate, the other to (Z,E)-9,11-tetradecadienyl acetate. The second type contained one neuron, responding the (Z,Z)-7,9- dodecadienyl acetate. No correlation between external morphology and physiological response of the investigated sensilla was observed in I. straminata. In field tests, a two-component blend containing (Z,Z)-9,11- tetradecadienyl acetate and (Z,Z)-7,9-dodecadienyl acetate in a ratio of 10:1 was attractive to males of I. aversata. This two-component blend was also attractive to males of I. straminata, but in a ratio of 1:1. High numbers of male I. biselata were caught in traps baited with (Z,Z)-7,9-dodecadienyl acetate alone. The incorporation of deuterium labels into pheromone components after topical application of deuterium-labeled palmitic acid confirmed that the pheromone components of I. aversata could be synthesized from this precursor, as has been previously observed for acetate pheromone components of many other moth species. Our results suggest that an evolutionary reversal back to the production of palmitic acid-derived pheromone components has occurred within the geometrid subfamily Sterrhinae.</p>},
  author       = {Zhu, Junwei and Ryrholm, Nils and Ljungberg, Håkan and Hansson, Bill S. and Hall, David and Reed, Darwin and Löfstedt, Christer},
  issn         = {0098-0331},
  language     = {eng},
  month        = {01},
  number       = {8},
  pages        = {1505--1526},
  publisher    = {Springer},
  series       = {Journal of Chemical Ecology},
  title        = {Olefinic acetates, Δ-9,11-14:OAc and Δ-7,9-12:OAc used as sex pheromone components in three geometrid moths, Idaea aversata, I. straminata, and I. biselata (Geometridae, Lepidoptera)},
  url          = {http://dx.doi.org/10.1007/BF02027728},
  doi          = {10.1007/BF02027728},
  volume       = {22},
  year         = {1996},
}