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COMPARISON OF ENERGY RESERVES AND UTILIZATION IN LIPOSCELIS BOSTRYCHOPHILA POPULATIONS SELECTED FOR TOLERANCE TO CONTROLLED ATMOSPHERE
Author(s) -
Jinjun WANG,
Zhimo ZHAO,
Xinping DENG,
Wei DING,
Lungshu LI
Publication year - 2002
Publication title -
insect science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.991
H-Index - 45
eISSN - 1744-7917
pISSN - 1672-9609
DOI - 10.1111/j.1744-7917.2002.tb00170.x
Subject(s) - biology , population , polysaccharide , zoology , nutrient , atmosphere (unit) , food science , biochemistry , ecology , medicine , physics , thermodynamics , environmental health
One population of Liposcelis bostrychophila Badonnel (CA selected) was exposed to a controlled atmosphere (CA) (35% CO 2 + 1% O 2 , balance N 2 ) for 30 generations. Another population (control) was reared under natural atmospheric conditions. Reserves of triacylglycerol, polysaccharides and free amino acids were evaluated in adults of the CA selected and the control populations in generations F 15 and F 30 . The utilization rate of triacylglycerol and polysaccharides in the CA exposure were also determined in generation F 30 . The results indicate that the reserves of triacylglycerol and polysaccharides increased significantly during selection for CA tolerance; the higher the tolerance level, the greater the reserves. A total of 15 free amino acids constituents were detected in both populations. The total amino acid content in the CA selected population was obviously higher than that in the control population. Exposure of this population to a controlled atmosphere was associated with a steady utilization of reserves. In contrast, the unselected population responded to the controlled atmosphere by accelerated utilization of triacylglycerol and polysachharides. Comparison of utilization rates during CA exposure showed that triacylglycerol is the main energy source, and polysaccharides contribute only a small extent to the metabolic energy supply.