Diapause induces changes in the composition and biophysical properties of lipids in larvae of the European corn borer, Ostrinia nubilalis (Lepidoptera: Crambidae)

Diapause induces remodeling of the fatty acid composition of membrane and storage lipids in overwintering larvae of Ostrinia nubilalis, Hubn. (Lepidoptera: Crambidae)

“…The main purpose of this study was to provide a detailed analysis of seasonal changes of storage and membrane FA composition, as well as storage lipid fluidity in overwintering larvae of O. nubilalis. This data will supplement our previous results on the composition and biophysical properties of lipids during diapause (Vukašinović et al, 2013) and further extend our knowledge…”

“…nubilalis larvae, are lower during diapause (Vukašinović et al, 2013). Recent work has established that the neutral lipid of overwintering freeze tolerant larvae of Eurosta solidaginis is dominated by acetylated triacylglycerols rather than as previously thought, the energydense long-chain triacylglycerols (Marshall et al, 2014), generally used by animals.…”

“…A relationship between increased FA unsaturation (UFAs/SFAs ratio), and diapause initiation has been observed in many insect species (Kuthiala and Chippendale, 1989;Ohtsu et al, 1993;Bennet et al, 1997;Buckner and Hagen, 2003;Bashan and Cakmak, 2005;Michaud and Denlinger, 2006;Koštál, 2010;Vukašinović et al, 2013). In most poikilotherms, the strong effect of temperature on the biophysical properties of lipids is compensated by a process known as homeoviscous adaptation (HVA) (Sinensky, 1974;Hazel, 1995;Hochachka and Somero, 2002).…”

Comprehensive History of CSP Genes: Evolution, Phylogenetic Distribution and Functions

“…Similarly, LA is a precursor of sex pheromone compound in moth species such as Bombycidae, Crambidae and arctiid moths [77][78][79]. Finally, LA and C18 fatty acids are known to play a key role in moth development as demonstrated in the crambidae species, Ostrinia nubilalis [80]. Therefore, the interactions of CSPs and LA/linolenic acid on fatty acid pathways would be crucial to regulate many various physiological systems, including pheromone biosynthesis, growth, development, tissue regeneration and/or toxin/insecticide immune responses in many various species from bacteria to all various groups of insects.…”

Effect of Cold Acclimation on Selected Metabolic Enzymes During Diapause in The European Corn Borer Ostrinia nubilalis (Hbn.)

“…A complex phenomenon, diapause consists of three major phases -pre-diapause, diapause and post-diapause (quiescence), giving the diapausing organism time to gradually change 1 . Plenty of biochemical and molecular adaptations occur during the different phases of diapause, including: metabolic depression 2 ; reduction in the activity of low-priority metabolic pathways and simultaneous redirection of metabolism towards the synthesis of specific cryoprotective molecules [3][4][5][6][7][8] ; changes in the fatty acid composition of membrane and storage lipids [9][10][11] , and expression of specific sets of genes and proteins which are involved in stress protection and regulation of cell cycle and programmed cell death [12][13][14][15][16] . In addition, prior to diapause entry, an organism is subjected to different behavioural activities such as migration, locating suitable micro-habitats, aggregation, and physiological processes such as accumulation of energy reserves, which altogether lead to increased stress tolerance 1 .…”