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Accumulation and utilization of triacylglycerol and polysaccharides in Liposcelis bostrychophila (Psocoptera, Liposcelididae) selected for resistance to carbon dioxide
Author(s) -
Wang J.J.,
Zhao Z.M.
Publication year - 2003
Publication title -
journal of applied entomology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.795
H-Index - 60
eISSN - 1439-0418
pISSN - 0931-2048
DOI - 10.1046/j.1439-0418.2003.00718.x
Subject(s) - polysaccharide , biology , carbon dioxide , psocoptera , population , zoology , food science , botany , biochemistry , ecology , demography , sociology
Two populations of the psocid, Liposcelis bostrychophila Badonnel, were exposed to two CO 2 ‐enriched atmospheres (35% CO 2 + 21% O 2 , and 55% CO 2 + 21% O 2 , balance N 2 ) for 30 generations. Controls were reared in normal atmospheres. The reserves of triacylglycerol and polysaccharides were evaluated in adults of the two experimental and the control populations in generations F 15 and F 30 . The utilization rate of triacylglycerol and polysaccharides in the CO 2 ‐enriched atmospheres were also determined in generation F 30 . The results indicated that the reserves of triacylglycerol and polysaccharides increased significantly during selection for CO 2 resistance; the higher the resistance level, the greater the reserves. Exposure of these populations to controlled atmosphere was associated with a steady utilization of the reserves. By contrast, the unselected population responded to controlled atmospheres by accelerated utilization of triacylglycerol and polysaccharides. Comparison of the utilization rates during CO 2 exposure showed that triacylglycerol is the main energy source, and polysaccharides contribute to metabolic energy supply only to a small extent.