scholarly journals Impacts of Non-Lethal High-Temperature Stress on the Development and Reproductive Organs of Bradysia odoriphaga

Insects ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 74
Author(s):  
Jingrong Hu ◽  
Rudoviko Galileya Medison ◽  
Seng Zhang ◽  
Peifang Ma ◽  
Caihua Shi
Keyword(s):  
High Temperature ◽  
Temperature Stress ◽  
High Temperatures ◽  
High Temperature Stress ◽  
Control Group ◽  
Hatching Rate ◽  
Testis Size ◽  
Male Adult ◽  
Male And Female ◽  
Unmated Male

Bradysia odoriphaga is an agricultural pest in China’s vegetable industry. In this study, pupae and adults were exposed to various non-lethal high-temperatures. The results demonstrated a decreased rate of eclosion once the pupae were exposed to temperatures exceeding 37 °C for 1 h. No effect on the lifespan of unmated female adults was observed after exposure to temperature stress, while unmated male adult lifespan decreased (>37 °C for 2 h). The size of the testis and ovaries for unmated male and female adults decreased, as did the fecundity and egg hatching rate for mated females. Compared with the control group (25 °C), the testis size of unmated male adults decreased after high-temperature stress followed by recovery at 25 °C for 1 h, though the size of the ovaries of female adults did not change. Additionally, the size of the testis and ovaries for unmated male and female adults decreased following high-temperature stress and 24 h of recovery at 25 °C. High temperatures affected males more than females; 37 °C is the critical temperature to control the population of B. odoriphaga. These results lay the foundation for the future development of environmentally friendly high-temperature prevention and pest-control strategies.

scholarly journals Involvement of Ca2+ in Regulation of Physiological Indices and Heat Shock Factor Expression in Four Iris germanica Cultivars under High-temperature Stress

2014 ◽  
Vol 139 (6) ◽  
pp. 687-698 ◽  
Author(s):  
Jing Mao ◽  
Hongliang Xu ◽  
Caixia Guo ◽  
Jun Tong ◽  
Yanfang Dong ◽  
...  
Keyword(s):  
High Temperature ◽  
Heat Shock ◽  
Temperature Stress ◽  
High Temperatures ◽  
Soluble Protein ◽  
High Temperature Stress ◽  
Temperature Tolerance ◽  
Heat Shock Factor ◽  
High Temperature Tolerance ◽  
Iris Germanica

Although tolerance to high temperature is crucial to the summer survival of Iris germanica cultivars in subtropical areas, few physiological studies have been conducted on this topic previously. To remedy this, this study explored the physiological response and expression of heat shock factor in four I. germanica cultivars with varying levels of thermotolerance. The plants’ respective degrees of high-temperature tolerance were evaluated by measuring the ratio and area of withered leaves under stress. Several physiological responses to high temperatures were investigated, including effects on chlorophyll, antioxidant enzymes, proline, and soluble protein content in the leaves of four cultivars. CaCl2 was sprayed on ‘Gold Boy’ and ‘Royal Crusades’ considered being sensitive to high temperatures to study if Ca2+ could improve the tolerance, and LaCl3 was sprayed on ‘Music Box’ and ‘Galamadrid’ with better high-temperature tolerance to test if calcium ion blocker could decrease their tolerance. Heat shock factor genes were partially cloned according to the conserved region sequence, and expression changes to high-temperature stress with CaCl2 or LaCl3 treatments were thoroughly analyzed. Results showed that high temperature is the primary reason for large areas of leaf withering. The ratio and area of withered leaves on ‘Music Box’ and ‘Galamadrid’ were smaller than ‘Gold Boy’ and ‘Royal Crusades’. CaCl2 slowed the degradation of chlorophyll content and increased proline and soluble protein in ‘Gold Boy’ and ‘Royal Crusades’ but had no significant effect on activating peroxidase or superoxide to improve high-temperature tolerance. Genetic expression of heat shock factor in ‘Gold Boy’ and ‘Royal Crusades’ was upregulated by Ca2+ at later stages of leaf damage under high-temperature stress. LaCl3 down-regulated the physiological parameters and expression level of heat shock factor in ‘Music Box’ and ‘Galamadrid’. These results suggest that different I. germanica cultivars have varying high-temperature tolerance and furthermore that Ca2+ regulates their physiological indicators and expression level of heat shock factor under stress.

Effect of high temperature stress on the fertility of male and female gametes of the sea cucumberApostichopus japonicus

2015 ◽  
Vol 47 (10) ◽  
pp. 3127-3135 ◽  
Author(s):  
Shilin Liu ◽  
Sicong Zhang ◽  
Xiaoshang Ru ◽  
Lina Sun ◽  
Jing Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Stress ◽  
High Temperature Stress ◽  
Male And Female

scholarly journals Physiological Responses of Intrinsic Small Abalone Haliotis diversicolor aquatilis under High Temperature Stress by Low Level 60CO Gamma Irradiation-Mediated Hormetic Effect

2020 ◽  
Vol 8 (11) ◽  
pp. 906
Author(s):  
Min-seok Jwa ◽  
Chang-Yu Hong
Keyword(s):  
High Temperature ◽  
Gamma Irradiation ◽  
Water Temperature ◽  
Temperature Stress ◽  
Gamma Ray ◽  
High Water ◽  
High Temperature Stress ◽  
Control Group ◽  
Haliotis Diversicolor ◽  
60Co Gamma

Haliotis diversicolor aquatilis (H. diversicolor aquatilis) is one of the aquaculture abalone species in Jeju Island, South Korea. The high water temperature in the middle of the summer season frequently limits the aquaculture productivity of abalone. To cope with the problem, this study aimed to investigate viability, attachment rate, changes of immune response, and physiological properties of juvenile small abalone Haliotis diversicolor aquatilis against high water temperature stress under 60CO-gamma irradiation-mediated hormetic effects. To examine physiological changes of abalone, the gamma-ray irradiated and non-irradiated groups were distinguished by grouping a total of 70 abalones in a treated group and a control group (each group included twenty-five female and ten male abalones). The treated group was exposed to 60CO-gamma irradiation using a designed experimental apparatus, the control group was not. Our results revealed that the low level of gamma ray (20 Gy)-irradiated Haliotis diversicolor aquatilis showed a 100% survival rate during the experiment. After gamma ray exposure, all the abalones were cultured without feeding and bioactivities were measured to examine gamma ray-induced physiological responses. The results suggested the potential for selective breeding using gamma ray irradiation hormesis to manipulate the number of eggs, fertilization rate, hatching rate, and attachment rate. The shell length of juvenile abalone was significantly enhanced by a 20 Gy radiation dose. We could presume that the effect of hormesis in the gamma-ray irradiation parent shellfish also had a genetic effect on the offspring. In order to verify changes in immune response and stress tolerance of abalone under high temperature stress, lysozyme activity and survival rates were compared at a water temperature of 30 °C. Interestingly, the 60Co gamma ray-irradiated abalones exhibited almost a 1.65-fold enhanced survival rate along with reduced lysozyme activity after 12 h of high temperature stress. Our results speculate that low levels of 60Co gamma ray-mediated hormetic effects can be an effective strategy for shell length growth and high temperature stress tolerance.

The effect of high temperature stress on male and female reproduction in plants

2015 ◽  
Vol 182 ◽  
pp. 30-42 ◽  
Author(s):  
Tammy L. Sage ◽  
Shaheen Bagha ◽  
Vanessa Lundsgaard-Nielsen ◽  
Haley A. Branch ◽  
Stefanie Sultmanis ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Stress ◽  
High Temperature Stress ◽  
Female Reproduction ◽  
Male And Female

Cycling ambient temperature effect on boar semen

1984 ◽  
Vol 38 (1) ◽  
pp. 129-132 ◽  
Author(s):  
H. Heitman ◽  
J. R. Cockrell ◽  
S. R. Morrison
Keyword(s):  
High Temperature ◽  
Low Temperature ◽  
Ambient Temperature ◽  
Temperature Stress ◽  
Semen Quality ◽  
High Temperature Stress ◽  
Low Temperature Stress ◽  
Temperature Cycle ◽  
Control Group ◽  
Medium Temperature

ABSTRACTTwenty-four 1-year-old boars of proven fertility were assigned randomly to one of two temperature-controlled trailers. A control group in each trial was held at 17 ± 0·5°C while the other group was exposed to a diurnal ambient temperature cycle. Cycles followed a sine-wave pattern with minimum and maximum temperatures occurring at 04.00 and 16.00 h respectively. Cycling temperature ranges were 17 to 33 ± 0·5°C (low-temperature stress), 19·5 to 35·5 ± 0·5°C (medium-temperature stress), and 22 to 38 ± 0·5°C (high-temperature stress). Semen samples were collected every 3 or 4 days over an experimental period of 42 days.Low-temperature stress and medium-temperature stress boars were not affected significantly in the five parameters of semen quality observed. The difference between controls and high-temperature stress boars was highly significant for motility, abnormal spermatozoa, gel-free volume, and total spermatozoa per ejaculate. Concentration of spermatozoa was not affected by treatment. Significant time effects were observed for motility, abnormal spermatozoa and total spermotozoa per ejaculate. Significant differences began to appear after 2 or 3 weeks and changes still appeared to be occurring at 6 weeks.

Response of Nostoc flagelliforme cell to Hyperthermia Stress

2012 ◽  
Vol 518-523 ◽  
pp. 614-618
Author(s):  
Jin Ying Guo ◽  
Ming Ke Shi ◽  
Guo Yan Ren ◽  
Yong Yin ◽  
Shi Ru Jia
Keyword(s):  
High Temperature ◽  
Temperature Stress ◽  
Electrolyte Leakage ◽  
Soluble Protein ◽  
High Temperature Stress ◽  
Control Group ◽  
Nostoc Flagelliforme ◽  
Sod Activity ◽  
Drought Tolerant ◽  
Moderately High Temperature

The effects of hyperthermia stress was studied in a terrestrial, drought-tolerant alga, Nostoc flagelliforme. The BG11 culture medium were used to culture Nostoc flagelliforme cell at different temperature conditions: 25°C, 35°C,45°Cand 55°C. The physiological and biochemical character of Nostoc flagelliforme cell, such as electrolyte leakage, the activities of superoxide dismutase(SOD), the content of malondialdehyde(MDA), proline(Pro), soluble protein and trehalose were tested after 8h, 12h, 16h and 24h treatment under 40μmol/m2/s. The results showed that: electrolyte leakage and malondialdehyde contents in Nostoc flagelliforme cell were higher under high temperature stress than those in the control group during high temperature stress. In the meanwhile SOD activity increased slightly under the high temperature stress, but were lower afterwards. The contents of Pro, soluble protein and trehalose increased under the moderately high-temperature stress, while declined under extremely high-temperature(55°C) stress.Therefore, it is proposed that the Nostoc flagelliforme cell had a certain extent resistance ability to the high-temperature, the osmotic adjustment function was stimulated, and the SOD activity was improved under certain high-temperature stress, but the Nostoc flagelliforme cell were damaged badly under extremely high-temperature(55°C) stress.

Assessment of wheat (Triticum aestivum L.) genotypes for high temperature stress tolerance using physico-chemical analysis

2020 ◽  
Vol 53 (2) ◽  
Author(s):  
Khalil Ahmed Laghari ◽  
Abdul Jabbar Pirzada ◽  
Mahboob Ali Sial ◽  
Muhammad Athar Khan ◽  
Jamal Uddin Mangi
Keyword(s):  
Triticum Aestivum ◽  
High Temperature ◽  
Chemical Analysis ◽  
Stress Tolerance ◽  
Temperature Stress ◽  
Triticum Aestivum L ◽  
High Temperature Stress ◽  
Physico Chemical

Genome-wide identification and analysis of maize PAL gene family and its expression profile in response to high-temperature stress

2020 ◽  
Vol 52 (5) ◽  
Author(s):  
De-Gong Wu ◽  
Qiu-Wen Zhan ◽  
Hai-Bing Yu ◽  
Bao-Hong Huang ◽  
Xin-Xin Cheng ◽  
...  
Keyword(s):  
High Temperature ◽  
Gene Family ◽  
Temperature Stress ◽  
Expression Profile ◽  
High Temperature Stress ◽  
Genome Wide

Impact of Metal Pad Etch-Induced Plasma Damage on Dynamic Retention Time Degradation during High Temperature Stress in High Density DRAM Technology

2005 ◽  
Author(s):  
D-J Kim ◽  
I-G Kim ◽  
J-Y Noh ◽  
H-J Lee ◽  
S-H Park ◽  
...  
Keyword(s):  
High Temperature ◽  
Temperature Stress ◽  
Retention Time ◽  
High Temperature Stress ◽  
High Density ◽  
Cell Junction ◽  
Antenna Effect ◽  
Plasma Damage ◽  
Root Cause ◽  
Wafer Processing

Abstract As DRAM technology extends into 12-inch diameter wafer processing, plasma-induced wafer charging is a serious problem in DRAM volume manufacture. There are currently no comprehensive reports on the potential impact of plasma damage on high density DRAM reliability. In this paper, the possible effects of floating potential at the source/drain junction of cell transistor during high-field charge injection are reported, and regarded as high-priority issues to further understand charging damage during the metal pad etching. The degradation of block edge dynamic retention time during high temperature stress, not consistent with typical reliability degradation model, is analyzed. Additionally, in order to meet the satisfactory reliability level in volume manufacture of high density DRAM technology, the paper provides the guidelines with respect to plasma damage. Unlike conventional model as gate antenna effect, the cell junction damage by the exposure of dummy BL pad to plasma, was revealed as root cause.

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