scholarly journals Differential Response of Leafminer Flies Liriomyza trifolii (Burgess) and Liriomyza sativae (Blanchard) to Rapid Cold Hardening

Insects ◽  
2021 ◽  
Vol 12 (11) ◽  
pp. 1041
Author(s):  
Junaid Iqbal ◽  
Xiao-Xiang Zhang ◽  
Ya-Wen Chang ◽  
Yu-Zhou Du
Keyword(s):  
Cold Tolerance ◽  
Cold Hardening ◽  
Short Term ◽  
Cold Temperatures ◽  
Liriomyza Sativae ◽  
Short Term Exposure ◽  
Rapid Cold Hardening ◽  
The Difference ◽  
Underlying Mechanisms ◽  
Interspecific Comparisons

Rapid cold hardening (RCH) is a rapid and critical adaption of insects to sudden temperature changes but is often overlooked or underestimated as a component of survival. Thus, interspecific comparisons of RCH are needed to predict how phenotypes will adapt to temperature variability. RCH not only enhances cold survival but also protects against non-lethal cold injury by preserving essential functions such as locomotion, reproduction, and energy balance. This study investigated the difference in basal cold tolerance and RCH capacity of L. trifolii and L. sativae. In both species, the cold tolerance of pupae was significantly enhanced after short-term exposure to moderately cold temperatures. The effect of RCH last for 4 h in L. sativae but only 2 h in L. trifolii. Interestingly, L. trifolii adults had a RCH response but L. sativae adults failed to acclimate. Short-term acclimation also lowered the supercooling point significantly in the pupae of both species. Based on these results, we propose a hypothesis that these differences will eventually affect their competition in the context of climate change. This study also provides the basis for future metabolomic and transcriptomic studies that may ultimately uncover the underlying mechanisms of RCH and interspecific competition between L. trifolii and L. sativae.

scholarly journals Constraints, independence, and evolution of thermal plasticity: Probing genetic architecture of long- and short-term thermal acclimation

2015 ◽  
Vol 112 (14) ◽  
pp. 4399-4404 ◽  
Author(s):  
Alison R. Gerken ◽  
Olivia C. Eller ◽  
Daniel A. Hahn ◽  
Theodore J. Morgan
Keyword(s):  
Cold Tolerance ◽  
Negative Correlation ◽  
Genetic Architecture ◽  
Cold Hardening ◽  
Short Term ◽  
Heritable Variation ◽  
Thermal Plasticity ◽  
Rapid Cold Hardening ◽  
Basal Thermotolerance

Seasonal and daily thermal variation can limit species distributions because of physiological tolerances. Low temperatures are particularly challenging for ectotherms, which use both basal thermotolerance and acclimation, an adaptive plastic response, to mitigate thermal stress. Both basal thermotolerance and acclimation are thought to be important for local adaptation and persistence in the face of climate change. However, the evolutionary independence of basal and plastic tolerances remains unclear. Acclimation can occur over longer (seasonal) or shorter (hours to days) time scales, and the degree of mechanistic overlap is unresolved. Using a midlatitude population ofDrosophila melanogaster, we show substantial heritable variation in both short- and long-term acclimation. Rapid cold hardening (short-term plasticity) and developmental acclimation (long-term plasticity) are positively correlated, suggesting shared mechanisms. However, there are independent components of these traits, because developmentally acclimated flies respond positively to short-term acclimation. A strong negative correlation between basal cold tolerance and developmental acclimation suggests that basal cold tolerance may constrain developmental acclimation, whereas a weaker negative correlation between basal cold tolerance and short-term acclimation suggests less constraint. Using genome-wide association mapping, we show the genetic architecture of rapid cold hardening and developmental acclimation responses are nonoverlapping at the SNP and corresponding gene level. However, genes associated with each trait share functional similarities, including genes involved in apoptosis and autophagy, cytoskeletal and membrane structural components, and ion binding and transport. These results indicate substantial opportunity for short-term and long-term acclimation responses to evolve separately from each other and for short-term acclimation to evolve separately from basal thermotolerance.

Modifying infants’ sensitivity to audiovisual temporal mismatch

2012 ◽  
Vol 25 (0) ◽  
pp. 84-85
Author(s):  
Ferran Pons ◽  
Maria Teixidó ◽  
Joel García-Morera ◽  
Jordi Navarra
Keyword(s):  
The Other ◽  
Short Term ◽  
Bouncing Ball ◽  
Speech Stimuli ◽  
Short Term Exposure ◽  
Ball Bouncing ◽  
The Difference ◽  
Two Phases ◽  
Av Synchrony ◽  
Paired Preference

Studies in adults reveal that a short-term exposure to asynchronous audiovisual signals induces temporal realignment between these signals (Di Luca et al., 2009; Fujisaki et al., 2004; Navarra et al., 2009; Vroomen et al., 2004). In contrast with this evidence in adults, Lewkowicz (2010) observed that infants increased their sensitivity to AV asynchrony after exposure to asynchronous AV speech. We investigated whether brief experience with an asynchronous AV event would increase infants’ ability to discriminate AV synchrony from asynchrony in non-speech stimuli or else induce temporal realignment as observed in adults. Twenty-four 6-month-old infants were tested in two phases (Test 1 and 2) using an intersensory paired-preference procedure, with simple stimuli (two balls bouncing against the floor — one ball bouncing in synchrony while the other one in asynchrony with respect to the bouncing sound). Between Test 1 and 2, infants were exposed to AV asynchrony (a presentation of an audiovisually asynchronous bouncing ball). The results revealed that infants detected the difference between AV synchrony and asynchrony only after being exposed to an asynchronous AV event. Our findings support the idea that experience with AV asynchrony has different consequences for adults and infants: while temporal AV recalibration is observed in adults, an increase of the sensitivity to AV asynchrony is observed in infants.

Rapid cold-hardening increases membrane fluidity and cold tolerance of insect cells

Cryobiology ◽  
2006 ◽  
Vol 52 (3) ◽  
pp. 459-463 ◽  
Author(s):  
Richard E. Lee ◽  
Krishnan Damodaran ◽  
Shu-Xia Yi ◽  
Gary A. Lorigan
Keyword(s):  
Membrane Fluidity ◽  
Cold Tolerance ◽  
Insect Cells ◽  
Cold Hardening ◽  
Rapid Cold Hardening

Anoxic stress and rapid cold hardening enhance cold tolerance of the migratory locust

Cryobiology ◽  
2014 ◽  
Vol 69 (2) ◽  
pp. 243-248 ◽  
Author(s):  
Feng Cui ◽  
Hongsheng Wang ◽  
Hanying Zhang ◽  
Le Kang
Keyword(s):  
Cold Tolerance ◽  
Cold Hardening ◽  
Migratory Locust ◽  
Rapid Cold Hardening

Effect of Rapid Cold Hardening on the Cold Tolerance of the Larvae of the Rice Stem Borer, Chilo suppressalis (Walker)

2008 ◽  
Vol 7 (3) ◽  
pp. 321-328 ◽  
Author(s):  
Cheng-kui QIANG ◽  
Yu-zhou DU ◽  
Ling-ya YU ◽  
Ya-dong CUI ◽  
Fu-shan ZHENG ◽  
...  
Keyword(s):  
Cold Tolerance ◽  
Stem Borer ◽  
Cold Hardening ◽  
Chilo Suppressalis ◽  
Rice Stem Borer ◽  
Rapid Cold Hardening

Rapid cold-hardening of Drosophila melanogaster (Diptera: Drosophiladae) during ecologically based thermoperiodic cycles

2001 ◽  
Vol 204 (9) ◽  
pp. 1659-1666 ◽  
Author(s):  
J.D. Kelty ◽  
R.E. Lee
Keyword(s):  
Drosophila Melanogaster ◽  
Low Temperatures ◽  
Cold Hardiness ◽  
Stress Protein ◽  
Cold Hardening ◽  
Short Term ◽  
Rapid Cold Hardening ◽  
Cold Tolerant ◽  
Acclimatory Response ◽  
Cooling Phase

In contrast to most studies of rapid cold-hardening, in which abrupt transfers to low temperatures are used to induce an acclimatory response, the primary objectives of this study were to determine (i) whether rapid cold-hardening was induced during the cooling phase of an ecologically based thermoperiod, (ii) whether the protection afforded was lost during warming or contributed to increased cold-tolerance during subsequent cycles and (iii) whether the major thermally inducible stress protein (Hsp70) or carbohydrate cryoprotectants contributed to the protection afforded by rapid cold-hardening. During the cooling phase of a single ecologically based thermoperiod, the tolerance of Drosophila melanogaster to 1 h at −7 degrees C increased from 5 +/− 5% survival to 62.5 +/− 7.3% (means +/− S.E.M., N=40-60), while their critical thermal minima (CTmin) decreased by 1.9 degrees C. Cold hardiness increased with the number of thermoperiods to which flies were exposed; i.e. flies exposed to six thermoperiods were more cold-tolerant than those exposed to two. Endogenous levels of Hsp70 and carbohydrate cryoprotectants were unchanged in rapidly cold-hardened adults compared with controls held at a constant 23 degrees C. In nature, rapid cold-hardening probably affords subtle benefits during short-term cooling, such as allowing D. melanogaster to remain active at lower temperatures than they otherwise could.

The Effect of Dimethyl Sulfoxide on In Vitro Platelet Function

1976 ◽  
Vol 36 (01) ◽  
pp. 221-229 ◽  
Author(s):  
Charles A. Schiffer ◽  
Caroline L. Whitaker ◽  
Morton Schmukler ◽  
Joseph Aisner ◽  
Steven L. Hilbert
Keyword(s):  
Platelet Count ◽  
Platelet Aggregation ◽  
Dimethyl Sulfoxide ◽  
Platelet Function ◽  
Platelet Volume ◽  
Short Term ◽  
Platelet Factor ◽  
Short Term Exposure ◽  
Structural Abnormalities

SummaryAlthough dimethyl sulfoxide (DMSO) has been used extensively as a cryopreservative for platelets there are few studies dealing with the effect of DMSO on platelet function. Using techniques similar to those employed in platelet cryopreservation platelets were incubated with final concentrations of 2-10% DMSO at 25° C. After exposure to 5 and 10% DMSO platelets remained discoid and electron micrographs revealed no structural abnormalities. There was no significant change in platelet count. In terms of injury to platelet membranes, there was no increased availability of platelet factor-3 or leakage of nucleotides, 5 hydroxytryptamine (5HT) or glycosidases with final DMSO concentrations of 2.5, 5 and 10% DMSO. Thrombin stimulated nucleotide and 5HT release was reduced by 10% DMSO. Impairment of thrombin induced glycosidase release was noted at lower DMSO concentrations and was dose related. Similarly, aggregation to ADP was progressively impaired at DMSO concentrations from 1-5% and was dose related. After the platelets exposed to DMSO were washed, however, aggregation and release returned to control values. Platelet aggregation by epinephrine was also inhibited by DMSO and this could not be corrected by washing the platelets. DMSO-plasma solutions are hypertonic but only minimal increases in platelet volume (at 10% DMSO) could be detected. Shrinkage of platelets was seen with hypertonic solutions of sodium chloride or sucrose suggesting that the rapid transmembrane passage of DMSO prevented significant shifts of water. These studies demonstrate that there are minimal irreversible alterations in in vitro platelet function after short-term exposure to DMSO.

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