Antifreeze agents of terrestrial arthropods

Glucidic variations in the lacewing Chrysopa walkeri during the prepupal diapause

“…In addition, glycerol was always present at very low concentration during cold exposure, or even undetectable. No consistent storage of trehalose or polyols was recorded during this artificial overwintering period; this suggests that other components (Duman et al, 1982) may assume the role 103 of cryoprotective agents in C. walkeri. It is obvious that the cryoprotection processes in this lacewing during the prepupal diapause need further investigation.…”

Glucidic variations in the lacewing Chrysopa walkeri during the prepupal diapause

“…In addition, glycerol was always present at very low concentration during cold exposure, or even undetectable. No consistent storage of trehalose or polyols was recorded during this artificial overwintering period; this suggests that other components (Duman et al, 1982) may assume the role 103 of cryoprotective agents in C. walkeri. It is obvious that the cryoprotection processes in this lacewing during the prepupal diapause need further investigation.…”

Simulated winter to summer transition in diapausing adults of the lady beetle ( Hippodamia convergens ): supercooling point is not indicative of cold‐hardiness

“…One possibility for enhancing insect cold-hardiness is the synthesis of antifreeze proteins (Duman et al, 1982). Although Duman (1979) reported the presence of thermal hysteresis factors in a coccinellid, studies in our laboratory suggested that these proteins were not present in overwintering adults of H .…”

Cold Tolerance and Population Dynamics of Leptoglossus zonatus (Hemiptera: Coreidae)

“…All insects utilize supercooling, at least to some degree, through the accumulation of cryoprotectant compounds in the hemolymphs such as low molecular weight alcohols e.g. glycerol [24] and/or large protein molecules [25]. Broadly speaking, three categories of insect cold tolerance classifications exist: freeze-tolerant, species that can survive some freezing; freeze-intolerant, species that die upon freezing; and chill-intolerant, insects that suffer mortality prior to freezing [26].…”

Glucidic variations in the lacewing Chrysopa walkeri during the prepupal diapause

“…In addition, glycerol was always present at very low concentration during cold exposure, or even undetectable. No consistent storage of trehalose or polyols was recorded during this artificial overwintering period; this suggests that other components (Duman et al, 1982) may assume the role 103 of cryoprotective agents in C. walkeri. It is obvious that the cryoprotection processes in this lacewing during the prepupal diapause need further investigation.…”

Simulated winter to summer transition in diapausing adults of the lady beetle ( Hippodamia convergens ): supercooling point is not indicative of cold‐hardiness

“…One possibility for enhancing insect cold-hardiness is the synthesis of antifreeze proteins (Duman et al, 1982). Although Duman (1979) reported the presence of thermal hysteresis factors in a coccinellid, studies in our laboratory suggested that these proteins were not present in overwintering adults of H .…”

Cold Tolerance and Population Dynamics of Leptoglossus zonatus (Hemiptera: Coreidae)

“…All insects utilize supercooling, at least to some degree, through the accumulation of cryoprotectant compounds in the hemolymphs such as low molecular weight alcohols e.g. glycerol [24] and/or large protein molecules [25]. Broadly speaking, three categories of insect cold tolerance classifications exist: freeze-tolerant, species that can survive some freezing; freeze-intolerant, species that die upon freezing; and chill-intolerant, insects that suffer mortality prior to freezing [26].…”

Glucidic variations in the lacewing Chrysopa walkeri during the prepupal diapause

“…In addition, glycerol was always present at very low concentration during cold exposure, or even undetectable. No consistent storage of trehalose or polyols was recorded during this artificial overwintering period; this suggests that other components (Duman et al, 1982) may assume the role 103 of cryoprotective agents in C. walkeri. It is obvious that the cryoprotection processes in this lacewing during the prepupal diapause need further investigation.…”

Simulated winter to summer transition in diapausing adults of the lady beetle ( Hippodamia convergens ): supercooling point is not indicative of cold‐hardiness

“…One possibility for enhancing insect cold-hardiness is the synthesis of antifreeze proteins (Duman et al, 1982). Although Duman (1979) reported the presence of thermal hysteresis factors in a coccinellid, studies in our laboratory suggested that these proteins were not present in overwintering adults of H .…”

Cold Tolerance and Population Dynamics of Leptoglossus zonatus (Hemiptera: Coreidae)

“…All insects utilize supercooling, at least to some degree, through the accumulation of cryoprotectant compounds in the hemolymphs such as low molecular weight alcohols e.g. glycerol [24] and/or large protein molecules [25]. Broadly speaking, three categories of insect cold tolerance classifications exist: freeze-tolerant, species that can survive some freezing; freeze-intolerant, species that die upon freezing; and chill-intolerant, insects that suffer mortality prior to freezing [26].…”