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Seasonal changes of free amino acids and thermal hysteresis in overwintering heteropteran insect, Pyrrhocoris apterus
- 1.0361246 - BC 2012 RIV US eng J - Journal Article
Košťál, Vladimír - Renault, D. - Rozsypal, Jan
Seasonal changes of free amino acids and thermal hysteresis in overwintering heteropteran insect, Pyrrhocoris apterus.
Comparative Biochemistry and Physiology A-Molecular & Integrative Physiology. Roč. 160, č. 2 (2011), s. 245-251. ISSN 1095-6433. E-ISSN 1531-4332
R&D Projects: GA ČR GA206/07/0269
Institutional research plan: CEZ:AV0Z50070508
Keywords : diapause * cold tolerance * ice nucleation
Subject RIV: ED - Physiology
Impact factor: 2.235, year: 2011
We sampled the adults monthly in the field during the cold season 2008-2009 and found active thermal hysteresis factors (THFs) in hemolymph of winter-sampled adults. The hysteresis between the equilibrium melting and freezing points ranged from 0.18°C to 0.30°C. The total free amino acid pool almost doubled during winter time. The sum concentrations of 27 free amino acids ranged between 35 – 40 mM in whole body water and 40 – 45 mM in hemolymph during December - February. Two amino acids, Pro and α-Ala most significantly contributed to the seasonal increase, while Gln showed the most dramatic seasonal decrease.
Permanent Link: http://hdl.handle.net/11104/0198606
Number of the records: 1