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Secretion of lipases in the digestive tract of the cricket Gryllus bimaculatus

Title data

Weidlich, Sandy ; Hoffmann, Klaus H. ; Woodring, Joseph:
Secretion of lipases in the digestive tract of the cricket Gryllus bimaculatus.
In: Archives of Insect Biochemistry and Physiology. Vol. 90 (2015) Issue 4 . - pp. 209-217.
ISSN 1520-6327
DOI: https://doi.org/10.1002/arch.21303

Abstract in another language

Little is known concerning the sites and the ratios of the lipase secretions in insects, therefore we undertook an examination of the lipase secretion of fed and unfed adult female Gryllus bimaculatus. The ratio of triacylglyceride lipase, diacylglyceride lipase, and phosphatidylcholine lipase secreted by fed females in the caecum and ventriculus is 1:1.4:0.4. These activities decrease in the caecum by 30-40% in unfed females. The total lipase activity (TLA) in the caecum is about 10 times that in the ventriculus. Minimal lipase secretion occurs before and during the final moult, and remains at this level in unfed crickets, indicating a basal secretion rate. In 2-day-old fed females, about 10% of the TLA in the entire gut is found in the crop, about 70% in the caecum, 20% in the ventriculus, and 3% in the ileum. Lipases in the ventriculus are recycled back to the caecum and little is lost in the feces. Oleic acid stimulated in vitro lipase secretion, but lipids did not. Feeding stimulated lipase secretion, starvation reduced lipase secretion, but this does not prove a direct prandal regulation of secretion, because feeding also induced a size and volume increase of the caecum.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: BAYCEER132654
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology > Chair Animal Ecology I
Research Institutions
Research Institutions > Research Centres
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Biology
Result of work at the UBT: Yes
DDC Subjects: 500 Science
Date Deposited: 04 Aug 2016 13:44
Last Modified: 04 Aug 2016 13:44
URI: https://eref.uni-bayreuth.de/id/eprint/33830