Seasonal changes of free amino acids and thermal hysteresis in overwintering heteropteran insect, Pyrrhocoris apterus

0361246 - BC 2012 RIV US eng J - Článek v odborném periodiku
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
Grant CEP: GA ČR GA206/07/0269
Výzkumný záměr: CEZ:AV0Z50070508
Klíčová slova: diapause * cold tolerance * ice nucleation
Kód oboru RIV: ED - Fyziologie
Impakt faktor: 2.235, rok: 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.
Trvalý link: http://hdl.handle.net/11104/0198606