To find evidence for a connection between heat stress response, oxidative stress, and common stress tolerance, we studied the effects of elevated growth temperatures and heat stress on the activity and expression of ascorbate peroxidase (APX). We compared wild-type Arabidopsis with transgenic plants overexpressing heat shock transcription factor 3 (HSF3), which synthesize heat shock proteins an...

The heat dissipation limit hypothesis suggests that the capacity for lactating mammals to transfer energy to their offspring through milk may be constrained by limits on heat dissipation, particularly in species that raise offspring in well-insulated nests. We tested a prediction of this hypothesis by evaluating whether lactating free-ranging red squirrels (Tamiasciurus hudsonicus) occupy less ...

In the present study, we show that the stress-inducible hsp70 gene in zebrafish is strongly and specifically expressed during normal lens formation from 28 to 38 hours post-fertilization, and is subsequently downregulated by 2 days of age. Only weak constitutive hsp70 mRNA signal was sporadically observed in other embryonic tissues. Similarly, transgenic fish carrying a 1.5 kb fragment of the h...

Competition at elite level can require athletes to perform optimally in extreme environmental conditions. This review focuses on mood responses in such conditions and proposes practical guidelines for those working with athletes. Different environments are considered, including altitude and extreme heat and cold. Performing in extreme heat, cold or at altitude can produce a stress response char...

in the current study, a set of 96 recombinant inbred lines (ril) at f8, derived from a cross between two varieties, anbarbu (sensitive to drought stress) and sepidroud (tolerant to drought stress) were used. the experiment was performed at gonbad kavous located in the golestan province of iran in 2010–2011 using two augmented designs at normal and stress conditions, separately. the ril populati...

The expression levels of three chitinase genes in Arabidopsis thaliana, AtChiA (class III), AtChiB (class I), and AtChiV (class IV), were examined under various stress conditions by semi-quantitative RT-PCR. Under normal growth conditions, the AtChiB and AtChiV genes were expressed in most organs of Arabidopsis plants at all growth stages, whereas the AtChiA gene was not expressed at all. The c...

The small heat shock protein alphaB-crystallin interacts with intermediate filament proteins. Using a co-sedimentation assay, we showed that in vitro binding of alphaB-crystallin to peripherin and vimentin was temperature-dependent. Specifically, a synthetic peptide representing the first ten residues of alphaB-crystallin was involved in this interaction. When cells were submitted to different ...