Metabolic response of cerambycid beetle (Morimus funereus) larvae to starvation and food quality
2002
Authors:
Ivanović, JelisavetaĐorđević, Suzana
Ilijin, Larisa
Janković Tomanić, Milena
Nenadović, Vera
Document Type:
Article (Published version)
,
© 2002 Elsevier Science Inc.
Metadata
Show full item recordAbstract:
The response of xylophagous Morimus funereus larvae to a direct change of diet demonstrated that the larvae from nutrient-poor substrates, e.g. oak, are very sensitive to such a change. Depending on dietary protein quality and quantity, an increase of proteolytic activity, i.e. an intensified protein metabolism accompanied by changes in body mass gain, was observed. At the same time, amylolytic activity was usually decreased. In the larvae reared on Robert's diet, sensitivity to the switch in diet was lower at the level of proteolytic enzymes that remained at the control level, while amylolytic activity was elevated. If the switch to a new diet was preceded by 7-day-starvation that disturbed nutritional homeostasis, the response of the larvae was similar to that recorded upon a direct switch only after short-term feeding (24 h) upon starvation. Differences in the response to changes in the diet of the larvae from nature, those reared under laboratory conditions and those of different physiological status could be ascribed to plasticity in the expression of the genes coding for proteases and their isoenzymes, as well as to the multi-functionality of some neurosecretory neurons, synthetic products that participate in the regulation of digestive enzyme activities.
Keywords:
Morimus funereus; Wild and laboratory-reared larvae; Body mass; Digestive enzymesSource:
Comparative Biochemistry and Physiology Part A, Molecular & Integrative Physiology, 2002, 132, 3, 555-566Funding / projects:
- Ministry for Science and Technology of Serbia,grant no. 1615
DOI: 10.1016/s1095-6433(02)00038-7
ISSN: 1095-6433
PubMed: 12044765