Physiology of cold tolerance in the bark beetle, Pityogenes chalcographus ant its overwintering in spruce stands

0427085 - BC 2015 RIV GB eng J - Článek v odborném periodiku
Košťál, Vladimír - Miklas, B. - Doležal, Petr - Rozsypal, Jan - Zahradníčková, Helena
Physiology of cold tolerance in the bark beetle, Pityogenes chalcographus ant its overwintering in spruce stands.
Journal of Insect Physiology. Roč. 63, č. 1 (2014), s. 62-70. ISSN 0022-1910. E-ISSN 1879-1611
Grant CEP: GA MŠMT LH12103
Grant ostatní: GS LČR(CZ) 08/2009
Institucionální podpora: RVO:60077344
Klíčová slova: cold hardiness * supercooling * glycogen
Kód oboru RIV: ED - Fyziologie
Impakt faktor: 2.470, rok: 2014
http://www.sciencedirect.com/science/article/pii/S0022191014000250

The seasonal development of physiological features underlying gradual acquisition of relatively high cold tolerance in overwintering adults of the bark beetles, /Pityogenes chalcographus/ was described. Glycogen and trehalose reserves are converted to glycerol during winter. High concentrations of glycerol help increasing the supercooling capacity. Beetles avoid freezing and, theoretically, can survive any conceivable winter cold. Field data, however, show that winter survival ranges from 24% to 69%. Meaning of laboratory-assays for field-survival estimation is discussed.
Trvalý link: http://hdl.handle.net/11104/0234295