Peptide Hormones in the Insect Midgut

Intestinal peptides as circulating hormones: release of tachykinin-related peptide from the locust and cockroach midgut.

Tachykinin-related peptides (TRPs) in the locust Locusta migratoria and the cockroach Leucophaea maderae have stimulatory effects on some muscles that are not innervated by TRP-containing neurons. Thus, these tissues may be affected by circulating TRPs. Here, we have investigated whether the midgut is the source of circulating TRPs. TRP-immunoreactive material in the locust midgut is found only...

Plasma membranes from insect midgut cells.

Plasma membranes from insect midgut cells are separated into apical and basolateral domains. The apical domain is usually modified into microvilli with a molecular structure similar to other animals. Nevertheless, the microvillar structure should differ in some insects to permit the traffic inside them of secretory vesicles that may budd laterally or pinch-off from the tips of microvilli. Other...

The chemistry of insect hormones and insect pheromones.

I. INSECT HORMONES

Plant Growth Hormones in Pinyon Insect Galls

BYERS J. A., BREWER J. W. & DENNA D. W. 1976. Plant growth hormones in pinyon insect galls. Marcellio 39, 125-134. Larvae of the midge Janetiella sp. near J. coloradensis Felt (Diptera: Cecidomyiidae) cause galls at the base of young needles of pinyon Pinus edulis Engelm. Bioassays of extracts from these galls contained as much as 17 times more auxin activity and as much as 21 times more gibber...

A specified midgut region controlling the symbiont titer in an insect - microbe 3 gut symbiotic association 4 5 Running title : Insect midgut region with antimicrobial activity 6 7