Oviposition deterring components in larval frass of Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae): A behavioural and electrophysiological evaluation

Anderson, Peter; Hilker, Monika; Hansson, Bill S.; Bombosch, S.; Klein, Birgit; Schildknecht, H.

doi:10.1016/0022-1910(93)90104-y

Cited by 93 publications

(57 citation statements)

References 34 publications

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“…Spodoptera larval frass, which deters oviposition in conspecific females, contains 1-indanone (Klein et al, 1990;Anderson et al, 1993), but we were unable to corroborate presence of 1-indanone or any other indane in frass collections of S. littoralis reared on several diets (data not shown). Indanone is found in roots of tropical plants (Okpekon et al, 2009), decaying wood fungi (Rukachaisirikul et al, 2013), and filamentous marine cyanobacteria (Nagle et al, 2000), which are probably not relevant for S. littoralis or C. pomonella.…”

Section: The Ecological Role Of Indanes Is Yet Unknownmentioning

confidence: 41%

A Conserved Odorant Receptor Detects the Same 1-Indanone Analogs in a Tortricid and a Noctuid Moth

et al. 2015

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Odorant receptors (ORs) interface animals with airborne chemical signals. They are under strong selection pressure and are therefore highly divergent in different taxa. Yet, some OR orthologs are highly conserved. These ORs may be tuned to odorants of broad importance, across species boundaries. Two widely distributed lepidopteran herbivores, codling moth Cydia pomonella (Tortricidae) feeding in apples and pears, and the African cotton leafworm Spodoptera littoralis (Noctuidae), a moth feeding on foliage of a wide range of herbaceous plants, both express a receptor ortholog, OR19, which shares 58% amino acid identity and 69% amino acid similarity. Following heterologous expression in the empty neuron system of Drosophila melanogaster, we show by single sensillum recordings that CpomOR19 and SlitOR19 show similar affinity to several substituted indanes. Tests with a series of compounds structurally related to 1-indanone show that 2-methyl-1-indanone, 2-ethyl-1-indanone, 3-methyl-1-indanone, and 1-indanone elicit a strong response from both ORs. A keto group in position 1 is essential for biological activity and so are both rings of the indane skeleton. However, there is an important difference in steric complementary of the indane rings and the receptor. Methyl substituents on the benzene ring largely suppressed the response. On the other hand, alkyl substituents at position 2 and 3 of the five-membered ring increased the response indicating a higher complementarity with the receptor cavity, in both CpomOR19 and SlitOR19. Our results demonstrate a conserved function of an odorant receptor in two moths that are phylogenetically and ecologically distant. It is conceivable that a conserved OR is tuned to signals that are relevant for both species, although their ecological roles are yet unknown. Our finding demonstrates that functional characterization of ORs leads to the discovery of novel semiochemicals that have not yet been found through chemical analysis of odorants from insects and their associated host plants.

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Section: The Ecological Role Of Indanes Is Yet Unknownmentioning

confidence: 41%

A Conserved Odorant Receptor Detects the Same 1-Indanone Analogs in a Tortricid and a Noctuid Moth

et al. 2015

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“…It is apparent from many studies that dose-response curves of electroantennographic (EAG) voltages or neuronal spike frequencies, as well as bioassays in the laboratory, are plotted with a logarithmic scale on the x-axis (e.g., Al Abassi et al 2000; Anderson et al 1993;Byers 1983;Delorme and Payne 1990;Dickens et al 1997;Dolzer et al 2003;Gemeno et al 2003;Hilbur et al 2001;Moore 1981;Preiss and Priesner 1988;Schal et al 1990;. The plots of data points of increasing dosages usually are connected by straight lines, probably because the curvilinear relationships were poorly understood and complicated to plot.…”

Section: Introductionmentioning

confidence: 99%

Modeling and Regression Analysis of Semiochemical Dose–Response Curves of Insect Antennal Reception and Behavior

Byers

2013

J Chem Ecol

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Dose-response curves of the effects of semiochemicals on neurophysiology and behavior are reported in many articles in insect chemical ecology. Most curves are shown in figures representing points connected by straight lines, in which the x-axis has order of magnitude increases in dosage vs. responses on the y-axis. The lack of regression curves indicates that the nature of the dose-response relationship is not well understood. Thus, a computer model was developed to simulate a flux of various numbers of pheromone molecules (10 3 to 5×10 6 ) passing by 10 4 receptors distributed among 10 6 positions along an insect antenna. Each receptor was depolarized by at least one strike by a molecule, and subsequent strikes had no additional effect. The simulations showed that with an increase in pheromone release rate, the antennal response would increase in a convex fashion and not in a logarithmic relation as suggested previously. Non-linear regression showed that a family of kinetic formation functions fit the simulated data nearly perfectly (R 2 >0.999). This is reasonable because olfactory receptors have proteins that bind to the pheromone molecule and are expected to exhibit enzyme kinetics. Over 90 dose-response relationships reported in the literature of electroantennographic and behavioral bioassays in the laboratory and field were analyzed by the logarithmic and kinetic formation functions. This analysis showed that in 95 % of the cases, the kinetic functions explained the relationships better than the logarithmic (mean of about 20 % better). The kinetic curves become sigmoid when graphed on a log scale on the x-axis. Dose-catch relationships in the field are similar to dose-EAR (effective attraction radius, in which a spherical radius indicates the trapping effect of a lure) and the circular EAR c in two dimensions used in mass trapping models. The use of kinetic formation functions for doseresponse curves of attractants, and kinetic decay curves for inhibitors, will allow more accurate predictions of insect catch in monitoring and control programs.

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“…Highly sensitive and specific ORNs have been found responding to oviposition deterrents identified from larval frass (Anderson et al, 1993). Additionally, varying degrees of sensitivity and selectivity were displayed by ORNs tuned to plant and flower odors and green leaf volatiles, like n-aliphatic alcohols and aldehydes (Anderson et al, 1995).…”

mentioning

confidence: 98%

Spatial representation of odorant structure in the moth antennal lobe: A study of structure–response relationships at low doses

Meijerink

Carlsson

Hansson

2003

J of Comparative Neurology

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How odorant structure and concentration are spatially represented within the primary olfactory integration center, the antennal lobe (AL) or olfactory bulb (013) in invertebrates and vertebrates, respectively, is currently a topic of high interest. Here, we show the spatial representation of odorant structure in the antennal lobe of the moth Spodoptera littoralis by imaging calcium activity evoked by straight chain aliphatic alcohols and aldehydes at low doses. Activity patterns of a given odor were most similar to compounds with the same functional group, differing in chain length by only one carbon atom. A chain length dependency was present as the most activated glomerulus in the lobe shifted from a medial to a lateral position with increasing chain length of the molecule. Statistical analysis revealed that in both classes of chemicals the chain length of the molecule was represented in a similar way. No topographically fixed domains were observed for any of the classes. However, activity patterns evoked by lower chain length molecules were spatially more distinct than patterns evoked by higher chain length molecules. The number of activated glomeruli for both classes of chemicals increased with increasing chain length to reach a maximum at eight or nine C atoms followed by a decrease as the chain length further increased. (C) 2003 Wiley-Liss, Inc

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Oviposition deterring components in larval frass of Spodoptera littoralis (Boisd.) (Lepidoptera: Noctuidae): A behavioural and electrophysiological evaluation

Cited by 93 publications

References 34 publications

A Conserved Odorant Receptor Detects the Same 1-Indanone Analogs in a Tortricid and a Noctuid Moth

A Conserved Odorant Receptor Detects the Same 1-Indanone Analogs in a Tortricid and a Noctuid Moth

Modeling and Regression Analysis of Semiochemical Dose–Response Curves of Insect Antennal Reception and Behavior

Spatial representation of odorant structure in the moth antennal lobe: A study of structure–response relationships at low doses

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