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https://www.readbyqxmd.com/read/28444544/methylglyoxal-detoxification-by-a-dj-1-family-protein-provides-dual-abiotic-and-biotic-stress-tolerance-in-transgenic-plants
#1
Prasad Melvin, Kondalarao Bankapalli, Patrick D'Silva, P V Shivaprasad
Methylglyoxal (MG) is a key signaling molecule resulting from glycolysis and other metabolic pathways. During abiotic stress, MG levels accumulate to toxic levels in affected cells. However, MG is routinely detoxified through the action of DJ1/PARK7/Hsp31 proteins that are highly conserved across kingdoms and mutations in such genes are associated with neurodegenerative diseases. Here, we report for the first time that, similar to abiotic stresses, MG levels increase during biotic stresses in plants, likely contributing to enhanced susceptibility to a wide range of stresses...
April 25, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28440014/biomass-derived-n-doped-porous-carbon-supported-single-fe-atoms-as-superior-electrocatalysts-for-oxygen-reduction
#2
Zhengping Zhang, Xinjin Gao, Meiling Dou, Jing Ji, Feng Wang
Exploring sustainable and high-performance electrocatalysts for the oxygen reduction reaction (ORR) is the crucial issue for the large-scale application of fuel cell technology. A new strategy is demonstrated to utilize the biomass resource for the synthesis of N-doped hierarchically porous carbon supported single-atomic Fe (SA-Fe/NHPC) electrocatalyst toward the ORR. Based on the confinement effect of porous carbon and high-coordination natural iron source, SA-Fe/NHPC, derived from the hemin-adsorbed bio-porphyra-carbon by rapid heat-treatment up to 800 °C, presents the atomic dispersion of Fe atoms in the N-doped porous carbon...
April 25, 2017: Small
https://www.readbyqxmd.com/read/28439766/enhanced-butyric-acid-tolerance-and-production-by-class-i-heat-shock-protein-overproducing-clostridium-tyrobutyricum-atcc-25755
#3
Yukai Suo, Sheng Luo, Yanan Zhang, Zhengping Liao, Jufang Wang
The response of Clostridium tyrobutyricum to butyric acid stress involves various stress-related genes, and therefore overexpression of stress-related genes can improve butyric acid tolerance and yield. Class I heat shock proteins (HSPs) play an important role in the process of protecting bacteria from sudden changes of extracellular stress by assisting protein folding correctly. The results of quantitative real-time PCR indicated that the Class I HSGs grpE, dnaK, dnaJ, groEL, groES, and htpG were significantly upregulated under butyric acid stress, especially the dnaK and groE operons...
April 24, 2017: Journal of Industrial Microbiology & Biotechnology
https://www.readbyqxmd.com/read/28439669/effects-of-desiccation-and-starvation-on-thermal-tolerance-and-the-heat-shock-response-in-forest-ants
#4
Andrew D Nguyen, Kerri DeNovellis, Skyler Resendez, Jeremy D Pustilnik, Nicholas J Gotelli, Joel D Parker, Sara Helms Cahan
Temperature increases associated with global climate change are likely to be accompanied by additional environmental stressors such as desiccation and food limitation, which may alter how temperature impacts organismal performance. To investigate how interactions between stressors influence thermal tolerance in the common forest ant, Aphaenogaster picea, we compared the thermal resistance of workers to heat shock with and without pre-exposure to desiccation or starvation stress. Knockdown (KD) time at 40.5 °C of desiccated ants was reduced 6% compared to controls, although longer exposure to desiccation did not further reduce thermal tolerance...
April 24, 2017: Journal of Comparative Physiology. B, Biochemical, Systemic, and Environmental Physiology
https://www.readbyqxmd.com/read/28439286/snp-discovery-and-genetic-variation-of-candidate-genes-relevant-to-heat-tolerance-and-agronomic-traits-in-natural-populations-of-sand-rice-agriophyllum-squarrosum
#5
Pengshan Zhao, Jiwei Zhang, Chaoju Qian, Qin Zhou, Xin Zhao, Guoxiong Chen, Xiao-Fei Ma
The extreme stress tolerance and high nutritional value of sand rice (Agriophyllum squarrosum) make it attractive for use as an alternative crop in response to concerns about ongoing climate change and future food security. However, a lack of genetic information hinders understanding of the mechanisms underpinning the morphological and physiological adaptations of sand rice. In the present study, we sequenced and analyzed the transcriptomes of two individuals representing semi-arid [Naiman (NM)] and arid [Shapotou (SPT)] sand rice genotypes...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28435055/cloning-and-characterization-of-a-new-cold-adapted-and-thermo-tolerant-%C3%AE-carrageenase-from-marine-bacterium-flavobacterium-sp-ys-80-122
#6
Shangyong Li, Jianhua Hao, Mi Sun
ι-Carrageenases play a role in marine ι-carrageenan degradation, and their enzymatic hydrolysates are thought to be excellent antioxidants. In this study, we identified a new ι-carrageenase, encoded by cgiF, in psychrophilic bacterium Flavobacterium sp. YS-80-122. The deduced ι-carrageenase, CgiF, belongs to glycoside hydrolase family 82 and shows less than 40% amino acid identity with characterized ι-carrageenases. The activity of recombinant CgiF peaked at 30°C (1,207.8U/mg). Notably, CgiF is a cold-adapted ι-carrageenase, which showed 36...
April 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28434688/stability-of-heat-stable-live-attenuated-rotavirus-vaccine-rotasiil%C3%A2
#7
Sameer P Naik, Jagdish K Zade, Rajendra N Sabale, Sambhaji S Pisal, Ravi Menon, Subhash G Bankar, Sunil Gairola, Rajeev M Dhere
Vaccines currently available across the globe are stored and transported in a continuous cold-chain at 2-8°C or below -20°C. A temperature excursion outside this range affects the potency of the vaccines. Such vaccines need to be discarded leading wastage. The Rotavirus disease burden is predominantly reported in developing and low-income countries and therefore, has entered or poised to enter their national immunization programs. These countries already have several limitations for effective storage, maintenance and distribution of vaccines in a cold-chain and this introduction is expected to further stress this fragile ecosystem...
April 20, 2017: Vaccine
https://www.readbyqxmd.com/read/28434155/nitrogen-fertility-and-abiotic-stresses-management-in-cotton-crop-a-review
#8
Aziz Khan, Daniel Kean Yuen Tan, Muhammad Zahir Afridi, Honghai Luo, Shahbaz Atta Tung, Mir Ajab, Shah Fahad
This review outlines nitrogen (N) responses in crop production and potential management decisions to ameliorate abiotic stresses for better crop production. N is a primary constituent of the nucleotides and proteins that are essential for life. Production and application of N fertilizers consume huge amounts of energy, and excess is detrimental to the environment. Therefore, increasing plant N use efficiency (NUE) is important for the development of sustainable agriculture. NUE has a key role in crop yield and can be enhanced by controlling loss of fertilizers by application of humic acid and natural polymers (hydrogels), having high water-holding capacity which can improve plant performance under field conditions...
April 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28431977/transcriptome-comparison-reveals-insights-into-muscle-response-to-hypoxia-in-blunt-snout-bream-megalobrama-amblycephala
#9
Bo-Xiang Chen, Shao-Kui Yi, Wei-Feng Wang, Yan He, Yan Huang, Ze-Xia Gao, Hong Liu, Wei-Min Wang, Huan-Ling Wang
The economic and biological significance of blunt snout bream (Megalobrama amblycephala) makes this species important to explore the underlying molecular mechanism of hypoxia response. In the present study, we compared the transcriptional responses to serious hypoxia in skeletal muscle among hypoxia tolerant (MT), sensitive (MS) and control (without hypoxia treatment, MC) M. amblycephala obtained according to the time difference of losing balance after hypoxia treatment. A total of 88,200,889 clean reads were generated and assembled into 44,493 unigenes...
April 18, 2017: Gene
https://www.readbyqxmd.com/read/28429190/study-on-environmental-indices-and-heat-tolerance-tests-in-hair-sheep
#10
L Seixas, C B de Melo, A M Menezes, A F Ramos, G R Paludo, V Peripolli, C B Tanure, J B G Costa Junior, C McManus
The ability to predict the effects of climatic factors on animals and their adaptability is important for livestock production. The aim of the present study was to analyze whether existing indices are suitable for evaluating heat stress in Santa Ines and Morada Nova sheep, which are locally adapted hair sheep breeds from northeastern Brazil, and if the limits used to classify thermal stress are suitable for these breeds. Therefore, climatic, physiological, and physical parameters, as well as thermographic images, were collected in 26 sheep, 1 1/2 years old, from two genetic groups (Santa Ines 12 males and 4 females; Morada Nov...
April 20, 2017: Tropical Animal Health and Production
https://www.readbyqxmd.com/read/28427825/molecular-mechanisms-of-the-yeast-adaptive-response-and-tolerance-to-stresses-encountered-during-ethanol-fermentation
#11
REVIEW
Choowong Auesukaree
During ethanol fermentation, yeast cells encounter various stresses including sugar substrates-induced high osmolarity, increased ethanol concentration, oxygen metabolism-derived reactive oxygen species (ROS), and elevated temperature. To cope with these fermentation-associated stresses, appropriate adaptive responses are required to prevent stress-induced cellular dysfunctions and to acquire stress tolerances. This review will focus on the cellular effects of these stresses, molecular basis of the adaptive response to each stress, and the cellular mechanisms contributing to stress tolerance...
April 17, 2017: Journal of Bioscience and Bioengineering
https://www.readbyqxmd.com/read/28425127/manipulation-of-glyoxalase-pathway-confers-tolerance-to-multiple-stresses-in-rice
#12
Brijesh K Gupta, Khirod K Sahoo, Ajit Ghosh, Amit K Tripathi, Khalid Anwar, Priyanka Das, Anil K Singh, Ashwani Pareek, Sudhir K Sopory, Sneh L Singla-Pareek
Crop plants face a multitude of diverse abiotic and biotic stresses in the farmers' fields. Although there now exists a considerable knowledge of the underlying mechanisms of response to individual stresses, the cross-talk between response pathways to various abiotic and biotic stresses remains enigmatic. Here, we investigated if the cytotoxic metabolite methylglyoxal (MG), excess of which is generated as a common consequence of many abiotic and biotic stresses, may serve as a key molecule linking responses to diverse stresses...
April 20, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28424893/diversity-in-growth-patterns-among-strains-of-the-lethal-fungal-pathogen-batrachochytrium-dendrobatidis-across-extended-thermal-optima
#13
Jamie Voyles, Leah R Johnson, Jason Rohr, Rochelle Kelly, Carley Barron, Delaney Miller, Josh Minster, Erica Bree Rosenblum
The thermal sensitivities of organisms regulate a wide range of ecological interactions, including host-parasite dynamics. The effect of temperature on disease ecology can be remarkably complex in disease systems where the hosts are ectothermic and where thermal conditions constrain pathogen reproductive rates. Amphibian chytridiomycosis, caused by the pathogen Batrachochytrium dendrobatidis (Bd), is a lethal fungal disease that is influenced by temperature. However, recent temperature studies have produced contradictory findings, suggesting that our current understanding of thermal effects on Bd may be incomplete...
April 19, 2017: Oecologia
https://www.readbyqxmd.com/read/28424845/the-regulatory-role-of-the-transcription-factor-crz1-in-stress-tolerance-pathogenicity-and-its-target-gene-expression-in-metarhizium-acridum
#14
Xing Chen, Yuanze Liu, Nemat O Keyhani, Yuxian Xia, Yueqing Cao
In fungi, the Ca(2+)/calcineurin signaling pathway is critical in mediating growth, morphology, stress responses, and pathogenicity. Crz1 is a calcineurin-responsive zinc finger transcription factor. Here, MaCrz1 was identified and functionally characterized in the entomopathogenic fungus Metarhizium acridum by characterization of a targeted gene knockout strain. Conidia of the ΔMacrz1 mutant were aberrant in cell surface features and lacked the characteristic hydrophobic rodlet layer, and the mutant displayed increased sensitivity to oxidative stress, cell wall perturbing agents, heat stress, and ultraviolet irradiation as compared to the wild-type and complemented strains...
April 19, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28424507/heat-stress-in-dairy-cattle-alters-lipid-composition-of-milk
#15
Z Liu, V Ezernieks, J Wang, N Wanni Arachchillage, J B Garner, W J Wales, B G Cocks, S Rochfort
Heat stress, potentially affecting both the health of animals and the yield and composition of milk, occurs frequently in tropical, sub-tropical and temperate regions. A simulated acute heat stress experiment was conducted in controlled-climate chambers and milk samples collected before, during and after the heat challenge. Milk lipid composition, surveyed using LC-MS, showed significant changes in triacylglycerol (TAG) and polar lipid profiles. Heat stress (temperature-humidity index up to 84) was associated with a reduction in TAG groups containing short- and medium-chain fatty acids and a concomitant increase in those containing long-chain fatty acids...
April 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28423462/geochemical-signatures-of-benthic-foraminiferal-shells-from-a-heat-polluted-shallow-marine-environment-provide-field-evidence-for-growth-and-calcification-under-extreme-warmth
#16
Danna Titelboim, Aleksey Sadekov, Ahuva Almogi-Labin, Barak Herut, Michal Kucera, Christiane Schmidt, Orit Hyams-Kaphzan, Sigal Abramovich
Shallow marine calcifiers play an important role as marine ecosystem engineers and in the global carbon cycle. Understanding their response to warming is essential to evaluate the fate of marine ecosystems under global change scenarios. A rare opportunity to test the effect of warming acting on natural ecosystems is by investigation of heat-polluted areas. Here we study growth and calcification in benthic foraminifera that inhabit a thermally polluted coastal area in Israel, where they are exposed to elevated temperatures reaching up to ~42°C in summer...
April 19, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28417425/overexpression-of-oshsp18-0-ci-enhances-resistance-to-bacterial-leaf-streak-in-rice
#17
Yanhu Ju, Hongjuan Tian, Ruihua Zhang, Liping Zuo, Guixiu Jin, Qian Xu, Xinhua Ding, Xiangkui Li, Zhaohui Chu
BACKGROUND: The small heat shock proteins represent a large family of proteins that respond to a wide range of abiotic and biotic stresses. OsHsp18.0-CI confers tolerance to salt and cadmium and interacts with viral RNA-dependent RNA polymerase (RdRp). However, the direct function of OsHsp18.0-CI in resistance against biotic stresses remains unclear in rice. RESULTS: Here, we report that the expression of OsHsp18.0-CI was up-regulated upon inoculation with RS105, a strain of Xanthomonas oryzae pv...
December 2017: Rice
https://www.readbyqxmd.com/read/28416700/intensifying-postfire-weather-and-biological-invasion-drive-species-loss-in-a-mediterranean-type-biodiversity-hotspot
#18
Jasper A Slingsby, Cory Merow, Matthew Aiello-Lammens, Nicky Allsopp, Stuart Hall, Hayley Kilroy Mollmann, Ross Turner, Adam M Wilson, John A Silander
Prolonged periods of extreme heat or drought in the first year after fire affect the resilience and diversity of fire-dependent ecosystems by inhibiting seed germination or increasing mortality of seedlings and resprouting individuals. This interaction between weather and fire is of growing concern as climate changes, particularly in systems subject to stand-replacing crown fires, such as most Mediterranean-type ecosystems. We examined the longest running set of permanent vegetation plots in the Fynbos of South Africa (44 y), finding a significant decline in the diversity of plots driven by increasingly severe postfire summer weather events (number of consecutive days with high temperatures and no rain) and legacy effects of historical woody alien plant densities 30 y after clearing...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28414789/effect-of-ph-on-temperature-controlled-degradation-of-reactive-oxygen-species-heat-shock-protein-expression-and-mucosal-immunity-in-the-sea-cucumber-isostichopus-badionotus
#19
Mariel Gullian Klanian, Montserrat Terrats Preciat
This study evaluated the effect of pH on the activity of antioxidant and immune enzymes in the sea cucumber Isostichopus badionotus exposed to different temperatures. The organisms (530 ±110 g) were exposed to 16, 20, 24, 28, 30, 34 and 36°C for 6 h to evaluate thermal limits at two water pH values (treatment = 7.70; control = 8.17). For the thermal tolerance experiment, the organisms were exposed to sublethal temperature of 34°C for 3, 6, 12, 24, and 48 h. I. badionotus showed signs of thermal stress by synthesizing heat shock protein 70 (hsp70) at the cold (16°C) and warm thermal limits (34°C)...
2017: PloS One
https://www.readbyqxmd.com/read/28414129/the-arabidopsis-endoplasmic-reticulum-associated-degradation-pathways-are-involved-in-the-regulation-of-heat-stress-response
#20
Lin-Mao Li, Shi-You Lü, Rong-Jun Li
The Cytosolic Protein Response (CPR) in the cytosol and the Unfolded Protein Response (UPR) and ER-associated degradation (ERAD) in the endoplasmic reticulum are major pathways of the cellular proteostasis network. However, despite years of effort, how these protein quality control systems coordinated in vivo remains largely unknown, particularly in plants. In this study, the roles of two evolutionarily conserved ERAD pathways (DOA10 and HRD1) in heat stress response were investigated through reverse genetic approaches in Arabidopsis...
April 14, 2017: Biochemical and Biophysical Research Communications
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