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"Males and females differ in their biobehavioural response to stress, where males exhibit a heightened sympathetic response to stress compared with females. Specifically, Taylor et al. 1 propose that the classic "fight-or-flight" response to stress is adaptive for males, whilst females engage in a so-called "tend-and-befriend" response to stress. We propose that the Y-chromosome gene, SRY (sex-determining region on the Y chromosome), provides a genetic basis for the heightened sympathetic reactivity to stress and thus predominance of "fight-flight" response in males. Our idea is based on studies that demonstrate (i) the presence of SRY in brain regions and peripheral tissues abundant in catecholamines, (ii) the regulation of catecholamine synthesis and breakdown by SRY, and (iii) the role of SRY in voluntary movement and blood pressure in males"

By: Kandil AA, AE Sharief, Ola S.A. Shereif Key Words: Canola, Cultivars, Salinity stress, seedlings characters. Int. J. Agr. Agri. Res. 8(2), 10-18, February 2016. Abstract To study the effect of salinity concentrations on seedlings parameters of some canola cultivars, a laboratory experiment was conducted at Agronomy Department Laboratory of Seed Testing, Faculty of Agriculture, Mansoura University, Egypt, during December 2013. The experiment included two factor, the first factor included three cultivars of canola i.e. Serw 4, Serw 6 and Serw 51 and the second factor included ten concentrations of salinity as NaCl i.e. 0.0 (control treatment), 0.2, 0.4, 0.6, 0.8, 1.0, 1.2, 1.4, 1.6, and 1.8 % NaCl). The results showed that Serw 6 cultivar significantly exceeded the other studied cultivars in root and shoot lengths and shoot fresh and dry weights. Whilst, Serw 51 cultivar significantly exceeded the other studied cultivars in root fresh and dry weights, seedling height reduction (SHR), relative dry weight and chlorophyll content in leaves. Salinity stress significantly affected seedlings characters of canola. Due to increasing salinity levels from 0 (control) to 1.8% NaCl, seedlings characters of canola was significantly decreased. It could be concluded that for maximizing canola seedlings parameters, germinated seeds of Serw 6 or Serw 51 cultivars under control treatment (without salinity stress) or under conditions of 0.2% NaCl.

"Previous research on rhesus macaques discovered that social rank influenced components of the stress response, brain, and immune system. With gene chip technology for measuring the expression of over 6,000 different genes, Tung, Gilad and colleagues at Yerkes, Emory University, and Johns Hopkins looked for the first time in primates at the effects of social rank on genetic function. Comparing 49 different female monkeys of different rank revealed significant changes in the expression of 987 genes, including 112 genes associated with immune system function. The result fits with data in monkeys where low rank and chronic stress lead to compromised immune function, and, more loosely, with human studies linking low socioeconomic status and high social stress to elevated disease risk."

Babies born to mothers who were stressed during pregnancy grow up less able to cope with stress themselves, researchers believe.

"In humans, physical stimulation, such as massage therapy, reduces stress and has demonstrable health benefits. Grooming in primates may have similar effects but it remains unclear whether the positive effects are due to physical contact or to its social value. Here we show that physical stimulation reduces stress in a coral reef fish, the surgeonfish Ctenochaetus striatus. These fish regularly visit cleaner wrasses Labroides dimidiatus to have ectoparasites removed. The cleanerfish influences client decisions by physically touching the surgeonfish with its pectoral and pelvic fins, a behaviour known as tactile stimulation. We simulated this behaviour by exposing surgeonfish to mechanically moving cleanerfish models. Surgeonfish had significantly lower levels of cortisol when stimulated by moving models compared with controls with access to stationary models. Our results show that physical contact alone, without a social aspect, is enough to produce fitness-enhancing benefits, a situation so far only demonstrated in humans"

" Das belege erstmals, dass Elektroakupunktur tatsächlich die physiologischen Folgen von chronischem Stress lindern kann - und dass eine Scheinakupunktur diesen Effekt nicht habe. Nach Ansicht der Forscher sind ihre Ergebnisse zumindest ein Indiz dafür, dass Akupunktur auch beim Menschen gegen chronischen Stress wirken könnte. Allerdings müsse man erst noch in klinischen Studien testen, ob der bei Ratten beobachtete Effekt auch beim Menschen auftrete. "Aber wir beginnen nun zumindest zu verstehen, was bei der Akupunktur auf molekularer Ebene passiert", sagt Eshkevari. #placebo !?!? Ladan Eshkevari (Georgetown University, Washington DC.) et al., Journal of Endocrinology, doi: 10.1530/JOE-12-0404 "

Canonical discriminant analysis (CDA) in combination with cluster analysis was used to assess 296 spring wheat lines derived from a cross between Bam (drought tolerant) and Arta (drought sensitive) cultivars using stress tolerance indices, at two

"There is a biological story with information. I have been repeating that in a natural environment, a stressor is information. So too much information would be too much stress, exceeding the threshold of antifragility. In medicine, we are discovering the healing powers of fasting, as the avoidance of too much hormonal rushes that come with the ingestion of food. Hormones convey information to the different parts of our system and too much of it confuses our biology. Here again, as with the story of the news received at too high a frequency, too much information becomes harmful. And in Chapter x (on ethics) I will show how too much data (particularly when sterile) causes statistics to be completely meaningless. Now let's add the psychological to this: we are not made to understand the point, so we overreact emotionally to noise. The best solution is to only look at very large changes in data or conditions, never small ones"

"But, "one has to be cautious. This is exciting science in rodents, but you can't just extrapolate to humans," says Emeran Mayer, a gastroenterologist and neuroscientist at UCLA's Center for Neurobiology of Stress who was not involved in the new study. Drug and food companies that make probiotics - beneficial bacteria taken in a pill or eaten in food such as yogurt - hope the products can help relieve depression, improve weight loss and cure other conditions, but there is little evidence in people that probiotics can accomplish those goals, Mayer says. "It's almost like science fiction; you can imagine the most amazing things because so little is known about it," he says. But, "So far there's really no evidence that probiotics affect emotions in humans." "

"Sie passten also ihre Einschätzung nur an, wenn wünschenswerte Informationen vorlagen... „Denk positiv!" Das ist einer der häufigsten Lebensratschläge. Zurecht, denn eine positive Grundeinstellung kann Studien zufolge tatsächlich Stress und Ängste abschwächen und fördert damit die geistige und körperliche Gesundheit. Tali Sharot und seinen Kollegen zufolge kann aber die Dosis den Optimismus wiederum zum Gift machen: Wer übertriebenermaßen Negativinformationen ausblendet, leugnet damit unter Umständen die Realität und ist in der Folge leichtsinnig, geben die Forscher zu bedenken."

Dr Simon Archer and his team at Surrey University were particularly interested in looking at the genes that were switched on or off in our volunteers by changes in the amount that we had made them sleep. "We found that overall there were around 500 genes that were affected," Archer explained. "Some which were going up, and some which were going down." What they discovered is that when the volunteers cut back from seven-and-a-half to six-and-a-half hours' sleep a night, genes that are associated with processes like inflammation, immune response and response to stress became more active. The team also saw increases in the activity of genes associated with diabetes and risk of cancer. The reverse happened when the volunteers added an hour of sleep. So the clear message from this experiment was that if you are getting less than seven hours' sleep a night and can alter your sleep habits, even just a little bit, it could make you healthier

"Meist verursachen mechanische Reize jedoch unsichtbare Veränderungen. Viele Pflanzen reagieren nur auf molekularer und genetischer Ebene. Die Acker-Schmalwand etwa flutet ihre Zellen mit Calcium und schüttet reaktive Sauerstoffverbindungen aus, sobald sie mechanischem Stress ausgesetzt ist. Dabei reicht es, die Blätter vorsichtig zwischen Daumen und Zeigefinger zu reiben, wie Lehcen Benikhlef von der Universität Freiburg in der Schweiz und seine Kollegen nun herausfanden. Wie sie in der Fachzeitschrift „BMC Plant Biology" beschreiben, ändert sich auch die Genexpression in den gestreichelten Blättern. Außerdem wird die äußerste Schicht des Blattes durchlässiger - vermutlich, damit der Cocktail aus Chemikalien besser austreten kann, der Angreifer fernhalten soll. "

A stuffed teddy bear that appears as if it?s inhaling and exhaling was designed by researchers to comfort fussy babies in the crib, but it seems to work even better for their mothers, a new study reveals. According to the mothers? estimates of crying time, babies who spent five months snuggling with ?Breathing Bear? did not cry any less than infants who shared their crib with a regular stuffed bear, say Evelyn B. Thoman, Ph.D., and Claire Novosad, Ph.D., of the University of Connecticut. But mothers of the Breathing Bear babies reported less depression and stress and described their infants as less fussy and difficult.

A study that tracked genetic mutations through the human equivalent of about 5,000 years has demonstrated for the first time that oxidative DNA damage is a primary cause of the process of mutation - the fuel for evolution but also a leading cause of aging, cancer and other diseases.

As we continue to carry around items that insist on requiring electricity to work, portable-even wearable-energy-generating systems are looking very attractive. A group of researchers has recently looked into the use of piezoelectric materials, which generate an electric field or potential when placed under mechanical stress. By placing these materials on a rubbery or flexible surface, they created a material that can generate the highest rate of energy conversion reported for similar systems. While these are still far from the market, the metrics of the flexible piezoelectrics so far are very promising.

Drury, a geneticist, is a pioneer in new research exploring the biological impacts of early adversity on children. She is the first scientist to show that extreme stress in infancy can biologically age a child by shortening the tips of chromosomes, known as telomeres. These caps keep chromosomes from shrinking when cells replicate. Shorter telomeres are linked to higher risks for heart disease, cognitive decline, diabetes and mental illness in adults.

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