Seasonal patterns of the thermal response in relation to sugar and polyol accumulation in overwintering adults of elm leaf beetle, Xanthogaleruca luteola (Coleoptera: Chrysomelidae)

Soudi, Shaghayegh; Moharramipour, Saeid

doi:10.1016/j.jtherbio.2012.02.003

Cited by 10 publications

(8 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In the present study, LTCA induced a twofold increase in myoinositol concentration (from 0.29 to 0.63mgg -1 dry mass) in F. candida. This concentration is much less than that found in some winter acclimated beetles and flies (Koštál et al, 1996;Soudi and Moharramipour, 2012;Vesala et al, 2012) and also to the concentration induced in response to 72h mild drought in F. candida and F. fimetaria (40mgg -1 dry mass). Thus, the previous indications that drought and cold tolerance can be achieved by overlapping adaptations in F. candida (Bayley and Holmstrup, 1999;Holmstrup et al, 2002) seem not connected to high levels of myoinositol alone.…”

Section: Compatible Osmolytes and Carbohydrate Metabolismmentioning

confidence: 55%

Induced cold tolerance mechanisms depend on duration of acclimation in the chill sensitiveFolsomia candida(Collembola)

Waagner

Holmstrup

Bayley

et al. 2013

Journal of Experimental Biology

View full text Add to dashboard Cite

SUMMARYDuring cold periods ectotherms may improve low temperature tolerance via rapid cold hardening (RCH) over a period of hours and/or long-term cold acclimation (LTCA) during days, weeks or months. However, the effect of duration and the major underlying mechanisms of these processes are still not fully understood. In the present study, the molecular and biochemical responses to RCH (1-3h) and LTCA (1-3days) and the corresponding benefits to survival were investigated using the chill-sensitive collembolan Folsomia candida. We investigated osmolyte accumulation, membrane restructuring and transcription of candidate genes as well as survival benefits in response to RCH and LTCA. RCH induced significant upregulation of targeted genes encoding enzymes related to carbohydrate metabolic pathways and genes encoding small and constitutively expressed heat shock proteins (Hsps), indicating that the animals rely on protein protection from a subset of Hsps during RCH and probably also LTCA. The upregulation of genes involved in carbohydrate metabolic processes initiated during RCH was likely responsible for a transient accumulation of myoinositol during LTCA, which may support the protection of protein and membrane function and structure. Membrane restructuring, composed especially of a significantly increased ratio of unsaturated to saturated phospholipid fatty acids seems to be a mechanism supplementary to activation of Hsps and myoinositol accumulation in LTCA. Thus, the moderate increase in cold shock tolerance conferred by RCH seems to be dominated by effects of Hsps, whereas the substantially better cold tolerance achieved after LTCA is dominated by post-transcriptional processes increasing membrane fluidity and cryoprotectant concentration.

show abstract

Section: Compatible Osmolytes and Carbohydrate Metabolismmentioning

confidence: 55%

Induced cold tolerance mechanisms depend on duration of acclimation in the chill sensitiveFolsomia candida(Collembola)

Waagner

Holmstrup

Bayley

et al. 2013

Journal of Experimental Biology

View full text Add to dashboard Cite

show abstract

“…Low-molecular weight sugars and polyols, including glycerol, trehalose, and myo-inositol have been reported as active cryoprotectant agents in other insects (Somme 1982, Storey and Storey 1991, Khani et al 2007, Atapour and Moharramipour 2009, Soudi and Moharramipour 2012. These components may function to stabilize membrane and protein structure at low temperature and low humidity (Crowe et al 1983, Carpenter andCrowe 1988).…”

Section: Discussionmentioning

confidence: 99%

“…All aqueous solutions were degassed by helium gas. Aliquots of whole body extracts (50 l) were run along with standards of myo-inositol, glucose, glycerol, and trehalose from 30 to 2,000 ppm dependent on sugar alcohol concentrations in samples (Khani et al 2007, Atapour and Moharramipour 2009, Soudi and Moharramipour 2012.…”

Section: Methodsmentioning

confidence: 99%

“…These are accumulated either at high concentrations as extracellular ice to prevent intracellular volume from falling below a critical minimum, or, in low concentrations as membrane protectants that stabilize a membraneÕs bilayer structure (Storey 1997). Although a considerable amount of information has been gathered on changes of cryoprotectants in overwintering insects (Joanisse and Storey 1994, Kostal and Simek 1995, Goto et al 2001, Kostal et al 2001, Khani et al 2007, Soudi and Moharramipour 2012, no attention has been paid to some coccinellids such as Hippodamia (Adonia) variegata (Goeze), despite the high economic importance of this predatory beetle. Accumulation of polyols as an adaptation to cold has been studied in some coccinellids (Hoshikawa 1981, Kostal et al 1996, Watanabe 2002.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Temperature-Dependent Chemical Components Accumulation inHippodamia variegata(Coleoptera: Coccinellidae) During Overwintering

2013

View full text Add to dashboard Cite

Hippodamia variegata (Goeze) is a widespread predator of aphid and has been reported as the most important naturally occurring enemy of aphids, in many countries. In this study, fluctuating levels of cryoprotectants in nonoverwintering and overwintering coccinellids were assessed in field and natural overwintering sites in Hamadan, Iran, from September of 2010 to June of 2011. Moreover, accumulations of polyols were investigated in response to subzero temperatures. Results demonstrated that concentrations of cryoprotectants changed during the study period under natural conditions. Large amounts of metabolic reserves, in the form of glycogen, accumulated before overwintering. Glycogen began to breakdown but polyols accumulated when ambient temperature decreased from October to December. Overwintering coccinellids displayed a threefold increase in levels of trehalose and a fivefold increase in levels of glucose and total cryoprotectants, but there was even a 45-fold increase in myo-inositol content when subzero temperatures were experienced. It was suggested that myo-inositol and glucose are the major cryoprotectants components in this species. In tests for cold response, the optimal temperature for polyol synthesis seems to be below -3°C. From November to February, all the collected coccinellids that had been kept at 10°C in the laboratory were dead after 30 d, indicating that high temperatures were not favorable for overwintering of this population. Moreover, exposure to high temperatures resulted in rapid catabolism of sugar alcohols. This result demonstrated significant correlation between ambient temperature decrease and accumulation of polyols, suggesting that low temperatures are responsible for polyols synthesis in this species.

show abstract

“…Given that Coleoptera is of great ecological significance coleopters are widely used in several studies, including those that evaluate the ecology, morphophysiology, genetic structure, and phylogeny of the order (Martínez-Navarro et al 2005, Short 2010, Soudi and Moharramipour 2012, Almeida et al 2009). Although several molecular and cytogenetic studies have been conducted, they are still scarce compared to the great diversity of the order; only 1% of the representatives have been analyzed.…”

mentioning

confidence: 99%

Evolutionary Dynamics of <i>Tropisternus</i> Karyotype (Coleoptera: Hydrophilidae: Hydrophilini) from Southern Brazil

et al. 2013

View full text Add to dashboard Cite

SummaryThe family Hydrophilidae is the largest group of the superfamily Hydrophiloidea to which the largest aquatic Polyphaga are allocated. Phylogenetic studies based on morphological characters suggest that in Hydrophilidae, specifically in Hydrophilini, the body size is related to the group evolution. Despite these morphological analyses, cytogenetic studies of this family are scarce, and there is not a correlation of morphologic and cytogenetic data outlined for this group. In this paper, we analyzed seventeen specimens of Tropisternus mutatus sapucay Fernández & Bachman from rivers from two localities in Southern Brazil. Chromosome analyses showed 2n=18 with a sex chromosome system of the Xy p type (2n=18=16+Xy p ). All the autosomes, including the X p chromosome, were metacentric. The basal number and the possible divergence among the different Hydrophilidae species analyzed to date, as well as the phylogeny proposed for Hydrophilini, are discussed.

show abstract

Seasonal patterns of the thermal response in relation to sugar and polyol accumulation in overwintering adults of elm leaf beetle, Xanthogaleruca luteola (Coleoptera: Chrysomelidae)

Cited by 10 publications

References 48 publications

Induced cold tolerance mechanisms depend on duration of acclimation in the chill sensitiveFolsomia candida(Collembola)

Induced cold tolerance mechanisms depend on duration of acclimation in the chill sensitiveFolsomia candida(Collembola)

Temperature-Dependent Chemical Components Accumulation inHippodamia variegata(Coleoptera: Coccinellidae) During Overwintering

Evolutionary Dynamics of <i>Tropisternus</i> Karyotype (Coleoptera: Hydrophilidae: Hydrophilini) from Southern Brazil

Contact Info

Product

Resources

About