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The secretion of digestive enzymes and caecal size are determined by dietary protein in the cricket Gryllus bimaculatus

Titelangaben

Woodring, Joseph ; Weidlich, Sandy:
The secretion of digestive enzymes and caecal size are determined by dietary protein in the cricket Gryllus bimaculatus.
In: Archives of Insect Biochemistry and Physiology. Bd. 93 (2016) Heft 3 . - S. 121-129.
ISSN 1520-6327
DOI: https://doi.org/10.1002/arch.21346

Abstract

In Gryllus bimaculatus, the size of the caecum decreases in the latter half ofeach instar to a stable minimal size with a steady minimal rate of digestiveenzyme secretion until feeding resumes after ecdysis. The higher the percentprotein in the newly ingested food, the faster and larger the caecum grows,and as a consequent the higher the secretion rate of trypsin and amylase.When hard boiled eggs (40% protein) are eaten the caecum is 2× larger,the trypsin secretion is almost 3× greater, and amylase 2.5× greater thenwhen fed the same amount of apples (1.5% protein). Only dietary proteinincreases amylase secretion, whereas dietary carbohydrates have no effect onamylase secretion. The minimal caecal size and secretion rate must besupported by utilization of hemolymph amino acids, but the growth of thecaecum and increasing enzymes secretions after the molt depend upon anamino acid source in the lumen. This simple regulation of digestive enzymesecretion is ideal for animals that must stop feeding in order to molt. Thisbasic control system does not preclude additional regulation mechanisms,such as prandal, which is also indicated for G. bimaculatus, or evenparamonal regulation. C 2016 Wiley Periodicals, Inc.

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Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Zusätzliche Informationen: BAYCEER137909
Institutionen der Universität: Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie > Lehrstuhl Tierökologie II - Evolutionäre Tierökologie
Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Biologie
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik
Eingestellt am: 19 Jan 2018 10:10
Letzte Änderung: 19 Jan 2018 10:10
URI: https://eref.uni-bayreuth.de/id/eprint/41421