W. Terra

Publications259
h-index54
Citations9,167
Highly Influential Citations483
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Insect digestive enzymes: properties, compartmentalization and function
4.5 – Biochemistry of Digestion
The origin and functions of the insect peritrophic membrane and peritrophic gel.
  • W. Terra
  • Biology, Medicine
  • Archives of insect biochemistry and physiology
  • 1 June 2001
TLDR
Since PM compartmentalizes the midgut, new physiological roles were added to those of the ancestral mucus (protection against abrasion and microorganism invasion) and these new roles are reviewed in the light of data on PM permeability and on enzyme compartmentalization, fluid fluxes, and ultrastructure of the midGut. Expand
Evolution of Digestive Systems of Insects
TLDR
L'organisation spatiale de l'appareil digestif est examinee chez les principaux ordres d'insectes et l'evolution et les caracteristiques adaptatives de l’appareils digestif sont examinees pour les ordres principaux d'Insectes. Expand
Biochemistry and Molecular Biology of Digestion
TLDR
The aim of this chapter is to establish uniform parameters for studying insect digestive enzymes, providing an overview of the biochemistry of insect digestion, and discusses factors affecting digestive enzymes in vivo. Expand
Compartmentalization of digestion
Biochemical and physiological processes that result in digestion of nutrient polymers in the insect midgut are arranged both spatially and temporally. This spatial and temporal separation is a result… Expand
Distribution of digestive enzymes among the endo- and ectoperitrophic spaces and midgut cells of Rhynchosciara and its physiological significance
TLDR
The results support the conclusion that digestion takes place in three spatially organized steps, and the existence of two extracellular sites for digestion in R. americana is considered to be an adaptation to conserve secreted enzymes. Expand
Organization, origin and function of the outer microvillar (perimicrovillar) membranes of Dysdercus peruvianus (Hemiptera) midgut cells
TLDR
The data suggest that perimicrovillar membranes are formed in Golgi areas, migrate as the internal membrane of double membrane vesicles, and finally fuse at the cell apex—the outer vesicle membrane with the microvillar membrane and the inner vesic membranes with the perim MicroVillar membrane. Expand
Midgut adaptation and digestive enzyme distribution in a phloem feeding insect, the pea aphid Acyrthosiphon pisum.
TLDR
The data suggest that the anterior midgut is structurally reinforced to resist osmotic pressures and that the transglycosylating alpha-Glu, together with CP and APN are bound to MPM, thus being both distributed over a large surface and prevented from excretion with honeydew. Expand
Physiology and biochemistry of insect digestion: an evolutionary perspective.
  • W. Terra
  • Biology, Medicine
  • Brazilian journal of medical and biological…
  • 1988
This review primarily considers those papers which provide a full description of the steps by which the ingested food is hydrolyzed in the different regions of the insect gut. It is organized on the… Expand
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