Electrophysiological and chemical analysis of sex pheromone communication system of the mottled umber,Erannis defoliaria (Lepidoptera: Geometridae)

1990 ◽  
Vol 16 (6) ◽  
pp. 1887-1897 ◽  
Author(s):  
Bill S. Hansson ◽  
Gabor Sz�cs ◽  
Frank Schmidt ◽  
Wittko Francke ◽  
Christer L�fstedt ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Chemical Analysis ◽  
Communication System ◽  
Pheromone Communication ◽  
Pheromone Communication System ◽  
Erannis Defoliaria

scholarly journals Evolution of the Sex Pheromone Communication System in Ostrinia Moths

Insects ◽  
2021 ◽  
Vol 12 (12) ◽  
pp. 1067
Author(s):  
Dan-Dan Zhang
Keyword(s):  
Sex Pheromone ◽  
European Corn Borer ◽  
Sexual Communication ◽  
Pheromone Communication ◽  
Pr Genes ◽  
Comprehensive Overview ◽  
Corn Borer ◽  
Asian Corn Borer ◽  
Pheromone Identification ◽  
Pheromone Communication System

It remains a conundrum in the evolution of sexual communication how the signals and responses can co-ordinate the changes during speciation. The genus Ostrinia contains several closely related species as well as distinctive strains with pheromone polymorphism and represents an example of ongoing speciation. Extensive studies in the genus, especially in the species the European corn borer O. nubilalis (ECB), the Asian corn borer O. furnacalis (ACB) and the adzuki bean borer O. scapulalis (ABB), have provided valuable insights into the evolution of sex pheromone communication. This review presents a comprehensive overview of the research on pheromone communication in different Ostrinia species over the past four decades, including pheromone identification and biosynthesis, the ligand profiles of pheromone receptor (PR) genes, the physiology of peripheral olfactory sensory neurons (OSNs) and the projection pattern to the antennal lobe. By integrating and comparing the closely related Ostrinia species and strains, it provides an evolutionary perspective on the sex pheromone communication in moths in general and also outlines the outstanding questions that await to be elucidated by future studies.

scholarly journals Two-step activation of meiosis by the mat1 locus in Schizosaccharomyces pombe.

1995 ◽  
Vol 15 (9) ◽  
pp. 4964-4970 ◽  
Author(s):  
M Willer ◽  
L Hoffmann ◽  
U Styrkársdóttir ◽  
R Egel ◽  
J Davey ◽  
...  
Keyword(s):  
Schizosaccharomyces Pombe ◽  
Fission Yeast ◽  
Communication System ◽  
Ectopic Expression ◽  
Cell Types ◽  
M Cells ◽  
Haploid Cell ◽  
Pheromone Communication ◽  
Mating Pheromones ◽  
Pheromone Communication System

The mat1 locus is a key regulator of both conjugation and meiosis in the fission yeast Schizosaccharomyces pombe. Two alternative DNA segments of this locus, mat1-P and mat1-M, specify the haploid cell types (Plus and Minus). Each segment includes two genes: mat1-P includes mat1-Pc and mat1-Pm, while mat1-M includes mat1-Mc and mat1-Mm. The mat1-Pc and mat1-Mc genes are responsible for establishing the pheromone communication system that mediates conjugation between P and M cells, while all four mat1 genes are required for meiosis in diploid P/M cells. Our understanding of the initiation of meiosis is based largely on indirect observations, and a more precise investigation of these events was required to define the interaction between the mat1 genes. Here we resolve this issue using synthetic pheromones and P/M strains with mutations in either mat1-Pc or mat1-Mc. Our results suggest a model in which the mat1 locus plays two roles in controlling meiosis. In the first instance, the mat1-Pc and mat1-Mc functions are required to produce the mating pheromones and receptors that allow the generation of a pheromone signal. This signal is required to induce the expression of mat1-Pm and mat1-Mm. This appears to be the major pheromone-dependent step in controlling meiosis since ectopic expression of these genes allows meiosis in the absence of mat1-Pc and mat1-Mc. The mat1-Pm and mat1-Mm products complete the initiation of meiosis by activating transcription of the mei3 gene.

scholarly journals Sexual attractiveness and reproductive performance in ageing females of a coccoid insect

2018 ◽  
Vol 14 (7) ◽  
pp. 20180262 ◽  
Author(s):  
Jun Tabata ◽  
Mayumi Teshiba
Keyword(s):  
Reproductive Success ◽  
Reproductive Performance ◽  
Sexual Conflict ◽  
Communication System ◽  
Rapid Decline ◽  
Sexual Attractiveness ◽  
Sexual Signals ◽  
Pheromone Communication ◽  
Female Age ◽  
Pheromone Communication System

Female age strongly influences reproductive success in various animals. Males are, therefore, expected to show preferential responses to sexual signals released from females of ages suitable for reproduction. Here, however, we report an unexpected and contradictory effect of ageing on sexual attractiveness and reproductive performance in a coccoid insect: the pheromone-based attractiveness of females increased with ageing, though their reproductive performance was in rapid decline. Surprisingly, senescent females continued releasing relatively high amounts of pheromone and maintained their sexual attractiveness, even at ages when they had almost completely lost fertility, with reduced densities of endosymbionts to support their physiology. Our dataset suggests a potential sexual conflict within a pheromone communication system, where females benefit at males' expense through deceptive signals of fertility.

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