Early quality assessment lessens pheromone specificity in a moth

Kárpáti Z.; Tasin M.; Cardé R.T.Dekker T.

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Early quality assessment lessens pheromone specificity in a moth

机译：Early quality assessment lessens pheromone specificity in a moth

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Pheromone orientation in moths is an exemplar of olfactory acuity. To avoid heterospecific mating, males respond to female-produced blends with high specificity and temporal resolution. A finely tuned sensory to projection neuron network secures specificity, and this network is thought to assess pheromone quality continually during orientation. We tested whether male moths do indeed evaluate each pheromone encounter and surprisingly found that male European corn borer moths instead generalize across successive encounters. Although initially highly ratio specific, once "locked on" to the pheromone plume the acceptable ratio can vary widely, and even unattractive blends can become attractive. We further found that this "mental shortcut" may be a consequence of the fact that sensory neurons exposed to frequent encounters do not reliably encode blend ratios. Neurons tuned to either of the two pheromone components adapt differentially in plumes containing the preferred blend ratio (97:3) and cause the olfactory sensory signal to "evolve," even in narrowly tuned pheromonal circuits. However, apparently the brain interprets these shifting signals as invariant "gestalts." Generalization in pheromone perception may mitigate stabilizing selection and allow introgression between sympatric strains, such as in the European corn borer, that otherwise appear isolated by pheromonal differences. Generalization may also be important in responses to general odorants, as circuits underlying these display vast sensitivity differences, complex interactions, and temporal intricacies.

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《Proceedings of the National Academy of Sciences of the United States of America》 |2013年第18期|7377-7382|共6页
作者
Kárpáti Z.; Tasin M.; Cardé R.T.Dekker T.;
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作者单位

Department of Zoology, Plant Protection Institute, Centre for Agricultural Research, H-1525, Budapest, Hungary;

Unit of Integrated Plant Protection, Swedish University of Agricultural Sciences, SE-230 53 Alnarp, Sweden;

Department of Entomology, University of California, Riverside, CA 92521, United StatesUnit of Chemical Ecology, Swedish University of Agricultural Sciences, SE-230 53 Alnarp, Sweden;

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收录信息美国《科学引文索引》(SCI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种英语
中图分类自然科学总论;
关键词
Blend recognition; Evolution; Odor processing; Sensory constraints; Sexual selection;

Early quality assessment lessens pheromone specificity in a moth

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