Selenium nanoparticles enhanced thermal tolerance and maintain cellular stress protection of Pangasius hypophthalmus reared under lead and high temperature

2017 ◽  
Vol 246 ◽  
pp. 107-116 ◽  
Author(s):  
Neeraj Kumar ◽  
K.K. Krishnani ◽  
Sanjay Kumar Gupta ◽  
Narendra Pratap Singh
Keyword(s):  
High Temperature ◽  
Thermal Tolerance ◽  
Cellular Stress ◽  
Selenium Nanoparticles ◽  
Stress Protection

Dietary zinc potentiates thermal tolerance and cellular stress protection of Pangasius hypophthalmus reared under lead and thermal stress

2017 ◽  
Vol 49 (2) ◽  
pp. 1105-1115 ◽  
Author(s):  
Neeraj Kumar ◽  
Kishore K Krishnani ◽  
Nitish K Chandan ◽  
Narendra P Singh
Keyword(s):  
Thermal Stress ◽  
Thermal Tolerance ◽  
Cellular Stress ◽  
Dietary Zinc ◽  
Stress Protection

Toward high-temperature thermal tolerance in solar selective absorber coatings: choosing high entropy ceramic HfNbTaTiZrN

2021 ◽  
Vol 9 (37) ◽  
pp. 21270-21280
Author(s):  
Cheng-Yu He ◽  
Xiang-Hu Gao ◽  
Dong-Mei Yu ◽  
Shuai-Sheng Zhao ◽  
Hui-Xia Guo ◽  
...  
Keyword(s):  
High Temperature ◽  
Functional Properties ◽  
Thermal Tolerance ◽  
High Performance ◽  
Configurational Entropy ◽  
High Entropy ◽  
Recent Advances

The most recent advances in high-entropy materials provide impetus for the development of high-performance materials, simultaneously providing high-temperature robustness and excellent functional properties owing to the high configurational entropy and distorted lattices.

scholarly journals Plastic responses of survival and fertility following heat stress in pupal and adult Drosophila virilis

2021 ◽  
Author(s):  
Benjamin Walsh ◽  
Steven Parratt ◽  
Natasha Mannion ◽  
Rhonda Snook ◽  
Amanda Bretman ◽  
...  
Keyword(s):  
Heat Stress ◽  
High Temperature ◽  
Temperature Stress ◽  
High Temperatures ◽  
Male Fertility ◽  
Thermal Tolerance ◽  
Drosophila Virilis ◽  
Life History Stage ◽  
Heat Hardening ◽  
The Impact

The impact of rising global temperatures on survival and reproduction is putting many species at risk of extinction. In particular, it has recently been shown that thermal effects on reproduction, especially limits to male fertility, can underpin species distributions in insects. However, the physiological factors influencing fertility at high temperatures are poorly understood. Key factors that affect somatic thermal tolerance such as hardening, the ability to phenotypically increase thermal tolerance after a mild heat shock, and the differential impact of temperature on different life stages, are largely unexplored for thermal fertility tolerance. Here, we examine the impact of high temperatures on male fertility in the cosmopolitan fruit fly Drosophila virilis. We first determined whether temperature stress at either the pupal or adult life-history stage impacts fertility. We then tested the capacity for heat-hardening to mitigate heat-induced sterility. We found that thermal stress reduces fertility in different ways in pupae and adults. Pupal heat stress delays sexual maturity, whereas males heated as adults can reproduce initially following heat stress, but lose the ability to produce offspring. We also found evidence that while heat-hardening in D. virilis can improve high temperature survival, there is no significant protective impact of this same hardening treatment on fertility. These results suggest that males may be unable to prevent the costs of high temperature stress on fertility through heat-hardening which limits a species’ ability to quickly and effectively reduce fertility loss in the face of short-term high temperature events.

Paclobutrazol protects black spruce seedlings against predisposition to gray mold induced by high temperature and drought

1994 ◽  
Vol 24 (5) ◽  
pp. 1033-1038 ◽  
Author(s):  
P.G. Zhang ◽  
J.C. Sutton ◽  
R.A. Fletcher
Keyword(s):  
High Temperature ◽  
Black Spruce ◽  
Gray Mold ◽  
Environmental Stresses ◽  
Fungicidal Action ◽  
Soil Drench ◽  
Stress Protection

Effects of paclobutrazol on the ability of high temperature and drought to predispose black spruce (Piceamariana (Mill.) B.S.R) seedlings to infection and sporulation of Botrytiscinerea Pers.:Fr. were examined. Paclobutrazol was applied as a soil drench at doses of 0, 20, and 40 mg/seedling pair on the first and third days of 2- and 4-week periods before the seedlings were subjected to darkness at 35 and 45 °C, or to drought, for various periods and inoculated with the pathogen. The paclobutrazol treatments markedly reduced sporulation incidence and the number of spores produced by the pathogen on needles of seedlings subjected to the environmental stresses for periods that marginally or moderately exceeded those needed for predisposition to B. cinerea. Sporulation in needles of paclobutrazol-treated seedlings increased substantially only when the stress treatments were relatively prolonged. The activity of paclobutrazol in suppressing effects of environmental predisposition of the seedlings to infection and sporulation of B. cinerea was considered to be mediated through stress protection as opposed to fungicidal action of the triazole.

scholarly journals Heat tolerance and thermal preference of the copepod Tigriopus californicus are insensitive to ecologically relevant dissolved oxygen levels

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Khuong V. Dinh ◽  
Arani Y. Cuevas-Sanchez ◽  
Katherine S. Buhl ◽  
Elizabeth A. Moeser ◽  
W. Wesley Dowd
Keyword(s):  
High Temperature ◽  
Dissolved Oxygen ◽  
Thermal Tolerance ◽  
Multiple Stressors ◽  
Interactive Effects ◽  
Egg Mass ◽  
Tigriopus Californicus ◽  
Oxygen Levels ◽  
Behavioral Preference ◽  
Diel Fluctuations

Abstract Shifting climate patterns may impose novel combinations of abiotic conditions on animals, yet understanding of the present-day interactive effects of multiple stressors remains under-developed. We tested the oxygen and capacity limited thermal tolerance (OCLTT) hypothesis and quantified environmental preference of the copepod Tigriopus californicus, which inhabits rocky-shore splashpools where diel fluctuations of temperature and dissolved oxygen (DO) are substantial. Egg-mass bearing females were exposed to a 5 h heat ramp to peak temperatures of 34.1–38.0 °C crossed with each of four oxygen levels: 22, 30, 100 and 250% saturation (4.7–5.3, 5.3–6.4, 21.2–21.3, and 50.7–53.3 kPa). Survival decreased at higher temperatures but was independent of DO. The behavioral preference of females was quantified in seven combinations of gradients of both temperature (11–37 °C) and oxygen saturation (17–206% or 3.6–43.6 kPa). Females avoided high temperatures regardless of DO levels. This pattern was more pronounced when low DO coincided with high temperature. In uniform temperature treatments, the distribution shifted toward high DO levels, especially in uniform high temperature, confirming that Tigriopus can sense environmental pO2. These results question the ecological relevance of OCLTT for Tigriopus and raise the possibility of microhabitat selection being used within splashpool environments to avoid physiologically stressful combinations of conditions.

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