Physiological and biochemical analysis of overwintering and cold tolerance in two Central European populations of the spruce bark beetle, Ips typographus

0361634 - BC 2012 RIV GB eng J - Článek v odborném periodiku
Košťál, Vladimír - Doležal, Petr - Rozsypal, Jan - Moravcová, M. - Zahradníčková, Helena - Šimek, Petr
Physiological and biochemical analysis of overwintering and cold tolerance in two Central European populations of the spruce bark beetle, Ips typographus.
Journal of Insect Physiology. Roč. 57, č. 8 (2011), s. 1136-1146. ISSN 0022-1910. E-ISSN 1879-1611
Grant CEP: GA ČR GA206/07/0269; GA ČR GP522/08/P600
Výzkumný záměr: CEZ:AV0Z50070508
Klíčová slova: cold tolerance * supercooling * freezing
Kód oboru RIV: ED - Fyziologie
Impakt faktor: 2.236, rok: 2011

The lower lethal temperature corresponds well to the supercooling point that ranges between -20 and -22°C during winter months. The supercooled state is stabilized by the absence of internal ice nucleators and by seasonal accumulation of a mixture of sugars and polyols up to the sum concentration of 900 mM. Lethal times for 50% mortality (Lt's50) in the supercooled state at -5, -10 or -15°C are weeks (autumn, spring) or even months (winter), suggesting relatively little mortality caused by chill injury.
Trvalý link: http://hdl.handle.net/11104/0198904