scholarly journals Antennal lobe organization and pheromone usage in bombycid moths

2014 ◽  
Vol 10 (4) ◽  
pp. 20140096 ◽  
Author(s):  
Shigehiro Namiki ◽  
Takaaki Daimon ◽  
Chika Iwatsuki ◽  
Toru Shimada ◽  
Ryohei Kanzaki
Keyword(s):  
Sex Pheromone ◽  
Bombyx Mori ◽  
Antennal Lobe ◽  
The Other ◽  
Component Mixture ◽  
Bombyx Mandarina ◽  
Neural Organization ◽  
Two Component ◽  
Moth Species ◽  
Mating Signal

We investigated the neuroanatomy of the macroglomerular complex (MGC), which is involved in sex pheromone processing, in five species in the subfamily Bombycinae, including Ernolatia moorei , Trilocha varians , Rondotia menciana , Bombyx mandarina and Bombyx mori . The glomerulus located at the dorsal-most part of the olfactory centre shows the largest volume in moth species examined to date. Such normal glomerular organization has been observed in E. moorei and T. varians , which use a two-component mixture and includes the compound bombykal as a mating signal. By contrast, the other three species, which use another component as a single attractant, exhibited a modified arrangement of the MGC. This correlation between pheromone usage and neural organization may be useful for understanding the process of speciation.

scholarly journals Anatomical Comparison of Antennal Lobes in Two Sibling Ectropis Moths: Emphasis on the Macroglomerular Complex

2021 ◽  
Vol 12 ◽  
Author(s):  
Jing Liu ◽  
Kang He ◽  
Zong-xiu Luo ◽  
Xiao-ming Cai ◽  
Lei Bian ◽  
...  
Keyword(s):  
Sex Pheromone ◽  
Propidium Iodide ◽  
Antennal Lobe ◽  
Sex Pheromones ◽  
Vital Role ◽  
Confocal Imaging ◽  
Pheromone Components ◽  
Tea Plantations ◽  
Moth Species ◽  
Important Basis

Ectropis obliqua and Ectropis grisescens are two sibling moth species of tea plantations in China. The male antennae of both species can detect shared and specific sex pheromone components. Thus, the primary olfactory center, i.e., the antennal lobe (AL), plays a vital role in distinguishing the sex pheromones. To provide evidence for the possible mechanism allowing this distinction, in this study, we compared the macroglomerular complex (MGC) of the AL between the males of the two species by immunostaining using presynaptic antibody and propidium iodide (PI) with antennal backfills, and confocal imaging and digital 3D-reconstruction. The results showed that MGC of both E. obliqua and E. grisescens contained five glomeruli at invariant positions between the species. However, the volumes of the anterior-lateral glomerulus (ALG) and posterior-ventral (PV) glomerulus differed between the species, possibly related to differences in sensing sex pheromone compounds and their ratios between E. obliqua and E. grisescens. Our results provide an important basis for the mechanism of mating isolation between these sibling moth species.

Fifth virial coefficient of a two-component mixture of hard discs

1997 ◽  
Vol 90 (4) ◽  
pp. 679-681
Author(s):  
F. SAIJA ◽  
G. FIUMARA ◽  
P.V. GIAQUINTA
Keyword(s):  
Virial Coefficient ◽  
Component Mixture ◽  
Two Component

scholarly journals Responses of the Pheromone-Binding Protein of the Silk Moth Bombyx mori on a Graphene Biosensor Match Binding Constants in Solution

Sensors ◽  
2021 ◽  
Vol 21 (2) ◽  
pp. 499
Author(s):  
Caroline Bonazza ◽  
Jiao Zhu ◽  
Roger Hasler ◽  
Rosa Mastrogiacomo ◽  
Paolo Pelosi ◽  
...  
Keyword(s):  
Bombyx Mori ◽  
Binding Protein ◽  
Binding Constants ◽  
Isoamyl Acetate ◽  
The Other ◽  
Oxide Surface ◽  
Binding Assays ◽  
Pheromone Binding Protein ◽  
Silk Moth ◽  
Good Agreement

An electronic biosensor for odors was assembled by immobilizing the silk moth Bombyx mori pheromone binding protein (BmorPBP1) on a reduced graphene oxide surface of a field-effect transistor. At physiological pH, the sensor detects the B. mori pheromones, bombykol and bombykal, with good affinity and specificity. Among the other odorants tested, only eugenol elicited a strong signal, while terpenoids and other odorants (linalool, geraniol, isoamyl acetate, and 2-isobutyl-3-methoxypyrazine) produced only very weak responses. Parallel binding assays were performed with the same protein and the same ligands, using the common fluorescence approach adopted for similar proteins. The results are in good agreement with the sensor’s responses: bombykol and bombykal, together with eugenol, proved to be strong ligands, while the other compounds showed only poor affinity. When tested at pH 4, the protein failed to bind bombykol both in solution and when immobilized on the sensor. This result further indicates that the BmorPBP1 retains its full activity when immobilized on a surface, including the conformational change observed in acidic conditions. The good agreement between fluorescence assays and sensor responses suggests that ligand-binding assays in solution can be used to screen mutants of a binding protein when selecting the best form to be immobilized on a biosensor.

scholarly journals Two-Component Mixture Model in the Presence of Covariates

2021 ◽  
pp. 1-15 ◽  
Author(s):  
Nabarun Deb ◽  
Sujayam Saha ◽  
Adityanand Guntuboyina ◽  
Bodhisattva Sen
Keyword(s):  
Mixture Model ◽  
Component Mixture ◽  
Two Component

scholarly journals Photoisomerization of 1-triphenylmethylcyclopentadiene. Di-π-methane rearrangement to 5,6,6-triphenylbicyclo[3.1.0]hex-2-ene

1977 ◽  
Vol 55 (1) ◽  
pp. 29-33 ◽  
Author(s):  
Stefan Weigl ◽  
John Warkentin
Keyword(s):  
Component Mixture ◽  
Two Component ◽  
Rearrangement Mechanism

Triphenylmethylcyclopentadiene exists as a mixture of isomers, the minor and major components of which are shown to be 1-triphenylmethylcyclopentadiene (1) and 2-triphenylmethyl-cyclopentadiene (2), respectively.Direct irradiation of a mixture of 1 and 2 led to formation of 5,6,6,-triphenylbicyclo[3.1.0]hex-2-ene (3) via rearrangement of 1. Acetophenone-sensitized irradiation of the same mixture gave 3 as well as a two component mixture of photodimers of 1 and/or 2. Results are interpreted in terms of the di-π-methane rearrangement mechanism.

scholarly journals Comparison of Chorion Structure of Eggs from Bombyx mori, Bombyx mandarina (Lepidoptera: Bombycidae) and Their First Filial Generation

1996 ◽  
Vol 31 (3) ◽  
pp. 407-415 ◽  
Author(s):  
Yutaka KAWAGUCHI ◽  
Yutaka BANNO ◽  
Katsumi KOGA ◽  
Takeshi KAWARABATA ◽  
Hiroshi DOIRA
Keyword(s):  
Bombyx Mori ◽  
Bombyx Mandarina ◽  
Filial Generation
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