Caste-dependent reactions to soldier defensive secretion and chiral alarm/recruitment pheromone inNasutitermes princeps

1990 ◽  
Vol 16 (10) ◽  
pp. 2865-2875 ◽  
Author(s):  
Yves Roisin ◽  
C. Everaerts ◽  
J. M. Pasteels ◽  
O. Bonnard
Keyword(s):  
Defensive Secretion ◽  
Recruitment Pheromone ◽  
Alarm Recruitment

Anatomy, ultrastructure, and functional morphology of the metathoracic tracheal defensive glands of the grasshopper Romalea guttata

1991 ◽  
Vol 69 (8) ◽  
pp. 2100-2108 ◽  
Author(s):  
Douglas W. Whitman ◽  
Johan P. J. Billen ◽  
David Alsop ◽  
Murray S. Blum
Keyword(s):  
Secretory Cell ◽  
Tactile Stimulation ◽  
Defensive Secretion ◽  
Smooth Endoplasmic Reticulum ◽  
Duct Cell ◽  
Secretory Cells ◽  
Glandular Tissue ◽  
Golgi Bodies ◽  
Romalea Guttata ◽  
Defensive Glands

In the lubber grasshopper Romalea guttata, the respiratory system produces, stores, and delivers a phenolic defensive secretion. The exudate is secreted by a glandular epithelium surrounding the metathoracic spiracular tracheal trunks. Embedded in the glandular tissue are multiple secretory units, each comprised of a basal secretory cell and an apical duct cell. Secretory cells have numerous mitochondria, a tubular, smooth endoplasmic reticulum, well-developed Golgi bodies, and a microvillilined vesicle thought to transfer secretion to the intracellular cuticular duct of a duct cell. Ducts empty into the metathoracic tracheal lumina where the exudate is stored behind the closed metathoracic spiracle. Tactile stimulation elicits secretion discharge, which begins when all spiracles except the metathoracic pair are closed and the abdomen is compressed. Increased hemostatic and pneumatic pressures drive air and secretion out of the spiracle with an audible hiss. Both metathoracic spiracles discharge simultaneously. The secretion erupts first as a dispersant spray, then as an adherent froth, and finally assumes the form of a slowly evaporating repellent droplet. Discharge force and number vary with eliciting stimuli, volume of stored secretion, and age, disturbance state, and temperature of the insect. Molting grasshoppers are unable to discharge because the stored exudate is lost with the shed cuticle. The advantages and limitations of a tracheal defensive system are discussed.

scholarly journals Chemical compounds of the foraging recruitment pheromone in bumblebees

2005 ◽  
Vol 92 (8) ◽  
pp. 371-374 ◽  
Author(s):  
Angeles Mena Granero ◽  
José M. Guerra Sanz ◽  
Francisco J. Egea Gonzalez ◽  
José L. Martinez Vidal ◽  
Anna Dornhaus ◽  
...  
Keyword(s):  
Chemical Compounds ◽  
Recruitment Pheromone

Triterpene saponin hemi-biosynthesis of a leaf beetle’s (Platyphora kollari) defensive secretion

2007 ◽  
Vol 94 (7) ◽  
pp. 601-605 ◽  
Author(s):  
Jean Ghostin ◽  
Jean-Louis Habib-Jiwan ◽  
Raoul Rozenberg ◽  
Désiré Daloze ◽  
Jacques M. Pasteels ◽  
...  
Keyword(s):  
Defensive Secretion ◽  
Triterpene Saponin

1,2- Dialkyl- 4(3H)- Quinazolinones in the Defensive Secretion of a Millipede ( Glomeris marginata)

Science ◽  
1966 ◽  
Vol 154 (3747) ◽  
pp. 390-391 ◽  
Author(s):  
Y. C. Meinwald ◽  
J. Meinwald ◽  
T. Eisner
Keyword(s):  
Defensive Secretion

Notizen: Marginalin, a Substance from the Pygidial Glands of Dytiscus Marginalis (Coleoptera): Molecular Associations with Polyamines in vitro

1990 ◽  
Vol 45 (10) ◽  
pp. 1455-1456 ◽  
Author(s):  
Michel Barbier
Keyword(s):  
Defensive Secretion ◽  
Biological Properties ◽  
Chemical Data ◽  
Pygidial Glands ◽  
Molecular Associations ◽  
Water Beetle ◽  
Physico Chemical ◽  
Biological Interest

Marginalin, a product previously isolated from the pygidial glands of the water-beetle Dytiscus marginalis (Coleoptera), strongly reacts in vitro to form complexes with polyamines of biological interest. With spermin and spermidin, this interaction is specific giving 1:1 complexes which were isolated and studied (physico-chemical data). The results so far observed are discussed in relationship with the known biological properties of spermin and spermidin and the significance of marginalin in the defensive secretion of the beetle

Sign in / Sign up

Export Citation Format

Share Document