Along the entire midgut, a peritrophic membrane consisted of acellular layers is observed in the lumen (Figure IA, B).
Dynamic role of microvilli in peritrophic membrane formation.
(1977), by studying the effects of DFB on the production of peritrophic membrane in L.
The effects of a chitin inhibitor -Dimilin- on the production of peritrophic membrane in the locust, Locusta migratoria.
Interralation of proteases from the midgut lumen, epithelia and peritrophic membrane
of the silkworm, Bombyx mori.
It might be speculated that feeding on treated leaves might have led to the destruction of peritrophic membrane
which ultimately lead the larvae being not able to feed well and result in slow growth rate.
Morphology of midgut trunk and peritrophic membrane
Since the proventriculus in the larvae of mosquitoes and Drosophila secretes the peritrophic membrane
(Wigglesworth 1931; Rizki 1956), it is suggested that in these insects its usual role in breakdown of food material has been relegated to the elaborate pharyngeal armature.
A single layer of more or less columnar epithelial cells followed by a peritrophic membrane
lines the midgut lumen (Fig.
The apical portion of digestive cells presents bubbles that release secretions together with the part of the cytoplasm immediately below the peritrophic membrane
The columnar cells, especially in the anterior midgut region, are considered responsible for digestive enzymes and peritrophic membrane
secretions, besides acting in the absorption of final digestion products (Santos et al., 1984; Lehane and Billingsley, 1996; Jordao et al., 1999).
The midgut of hymenopterans is a relatively long tube, lined with a single layered epithelium, 2 layers of circular (inner) and longitudinal (outer) muscles, and a peritrophic membrane
enclosing the food (Snodgrass 1935; Serrao & Cruz-Landim 1996b).