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https://www.readbyqxmd.com/read/28926597/altered-embryonic-development-in-northern-bobwhite-quail-colinus-virginianus-induced-by-pre-incubation-oscillatory-thermal-stresses-mimicking-global-warming-predictions
#1
Kelly S Reyna, Warren W Burggren
Global warming is likely to alter reproductive success of ground-nesting birds that lay eggs normally left unattended for days or even weeks before actual parental incubation, especially in already warm climates. The native North American bobwhite quail (Colinus virginianus) is such a species, and pre-incubation quail eggs may experience temperatures ≥45°C. Yet, almost nothing is known about embryonic survival after such high pre-incubation temperatures. Freshly laid bobwhite quail eggs were exposed during a 12 day pre-incubation period to one of five thermal regimes: low oscillating temperatures (25-40°C, mean = 28...
2017: PloS One
https://www.readbyqxmd.com/read/28923951/bpm-cul3-e3-ligase-modulates-thermotolerance-by-facilitating-negative-regulatory-domain-mediated-degradation-of-dreb2a-in-arabidopsis
#2
Kyoko Morimoto, Naohiko Ohama, Satoshi Kidokoro, Junya Mizoi, Fuminori Takahashi, Daisuke Todaka, Junro Mogami, Hikaru Sato, Feng Qin, June-Sik Kim, Yoichiro Fukao, Masayuki Fujiwara, Kazuo Shinozaki, Kazuko Yamaguchi-Shinozaki
DEHYDRATION-RESPONSIVE ELEMENT BINDING PROTEIN 2A (DREB2A) acts as a key transcription factor in both drought and heat stress tolerance in Arabidopsis and induces the expression of many drought- and heat stress-inducible genes. Although DREB2A expression itself is induced by stress, the posttranslational regulation of DREB2A, including protein stabilization, is required for its transcriptional activity. The deletion of a 30-aa central region of DREB2A known as the negative regulatory domain (NRD) transforms DREB2A into a stable and constitutively active form referred to as DREB2A CA...
September 18, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28922773/crop-model-assisted-phenomics-and-genome-wide-association-study-for-climate-adaptation-of-indica-rice-2-thermal-stress-and-spikelet-sterility
#3
Michael Dingkuhn, Richard Pasco, Julie Mae Pasuquin, Jean Damo, Jean-Christophe Soulié, Louis-Marie Raboin, Julie Dusserre, Abdoulaye Sow, Baboucarr Manneh, Suchit Shrestha, Tobias Kretzschmar
Low night and high day temperatures during sensitive reproductive stages cause spikelet sterility in rice. Phenotyping of tolerance traits in the field is difficult because of temporal interactions with phenology and organ temperature differing from ambient. Physiological models can be used to separate these effects. A 203-accession indica rice diversity panel was phenotyped for sterility in ten environments in Senegal and Madagascar and climate data were recorded. Here we report on sterility responses while a companion study reported on phenology...
July 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28922347/pearl-millet-genome-sequence-provides-a-resource-to-improve-agronomic-traits-in-arid-environments
#4
Rajeev K Varshney, Chengcheng Shi, Mahendar Thudi, Cedric Mariac, Jason Wallace, Peng Qi, He Zhang, Yusheng Zhao, Xiyin Wang, Abhishek Rathore, Rakesh K Srivastava, Annapurna Chitikineni, Guangyi Fan, Prasad Bajaj, Somashekhar Punnuri, S K Gupta, Hao Wang, Yong Jiang, Marie Couderc, Mohan A V S K Katta, Dev R Paudel, K D Mungra, Wenbin Chen, Karen R Harris-Shultz, Vanika Garg, Neetin Desai, Dadakhalandar Doddamani, Ndjido Ardo Kane, Joann A Conner, Arindam Ghatak, Palak Chaturvedi, Sabarinath Subramaniam, Om Parkash Yadav, Cécile Berthouly-Salazar, Falalou Hamidou, Jianping Wang, Xinming Liang, Jérémy Clotault, Hari D Upadhyaya, Philippe Cubry, Bénédicte Rhoné, Mame Codou Gueye, Ramanjulu Sunkar, Christian Dupuy, Francesca Sparvoli, Shifeng Cheng, R S Mahala, Bharat Singh, Rattan S Yadav, Eric Lyons, Swapan K Datta, C Tom Hash, Katrien M Devos, Edward Buckler, Jeffrey L Bennetzen, Andrew H Paterson, Peggy Ozias-Akins, Stefania Grando, Jun Wang, Trilochan Mohapatra, Wolfram Weckwerth, Jochen C Reif, Xin Liu, Yves Vigouroux, Xun Xu
Pearl millet [Cenchrus americanus (L.) Morrone] is a staple food for more than 90 million farmers in arid and semi-arid regions of sub-Saharan Africa, India and South Asia. We report the ∼1.79 Gb draft whole genome sequence of reference genotype Tift 23D2B1-P1-P5, which contains an estimated 38,579 genes. We highlight the substantial enrichment for wax biosynthesis genes, which may contribute to heat and drought tolerance in this crop. We resequenced and analyzed 994 pearl millet lines, enabling insights into population structure, genetic diversity and domestication...
September 18, 2017: Nature Biotechnology
https://www.readbyqxmd.com/read/28919927/characterization-of-a-heat-tolerant-chlorella-sp-gd-mutant-with-enhanced-photosynthetic-co2-fixation-efficiency-and-its-implication-as-lactic-acid-fermentation-feedstock
#5
Tse-Min Lee, Yu-Fei Tseng, Chieh-Lun Cheng, Yi-Chuan Chen, Chih-Sheng Lin, Hsiang-Yen Su, Te-Jin Chow, Chun-Yen Chen, Jo-Shu Chang
BACKGROUND: Fermentative production of lactic acid from algae-based carbohydrates devoid of lignin has attracted great attention for its potential as a suitable alternative substrate compared to lignocellulosic biomass. RESULTS: A Chlorella sp. GD mutant with enhanced thermo-tolerance was obtained by mutagenesis using N-methyl-N'-nitro-N-nitrosoguanidine to overcome outdoor high-temperature inhibition and it was used as a feedstock for fermentative lactic acid production...
2017: Biotechnology for Biofuels
https://www.readbyqxmd.com/read/28919336/staphylococcus-aureus-dry-surface-biofilms-are-more-resistant-to-heat-treatment-than-traditional-hydrated-biofilms
#6
A Almatroudi, S Tahir, H Hu, D Chowdhury, I B Gosbell, S O Jensen, G S Whiteley, A K Deva, T Glasbey, K Vickery
BACKGROUND: The importance of biofilms to clinical practice is being increasingly realised. Biofilm tolerance to antibiotics is well described but limited work has been conducted on the efficacy of heat disinfection and sterilization against biofilms. AIM: To test the susceptibility of planktonic, hydrated biofilm and dry-surface biofilm forms of Staphylococcus aureus, to dry heat and wet heat treatments. METHODS: S. aureus was grown as both hydrated biofilm and dry-surface biofilm in the CDC biofilm generator...
September 14, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28915397/alleviation-of-cadmium-toxicity-in-lemna-minor-by-exogenous-salicylic-acid
#7
Qianqian Lu, Tingting Zhang, Wei Zhang, Chunlei Su, Yaru Yang, Dan Hu, Qinsong Xu
Cadmium (Cd) is a significant environmental pollutant in the aquatic environment. Salicylic acid (SA) is a ubiquitous phenolic compound. The goal of this study was to assess the morphological, physiological and biochemical changes in duckweed (L. minor) upon exposure to 10μM CdCl2, 10μM CdCl2 plus 50μM SA, or 50μM SA for 7 days. Reversing the effects of Cd, SA decreased Cd accumulation in plants, improved accumulation of minerals (Ca, Mg, Fe, B, Mo) absorption, increased endogenous SA concentration, and phenylalanine ammonialyase (PAL) activity...
September 12, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28914758/up-regulation-of-hsfa2c-and-hsps-by-aba-contributing-to-improved-heat-tolerance-in-tall-fescue-and-arabidopsis
#8
Xiuyun Wang, Lili Zhuang, Yi Shi, Bingru Huang
Abscisic acid (ABA) is known to play roles in regulating plant tolerance to various abiotic stresses, but whether ABA's effects on heat tolerance are associated with its regulation of heat stress transcription factors (HSFs) and heat shock proteins (HSPs) is not well documented. The objective of this study was to determine whether improved heat tolerance of tall fescue (Festuca arundinacea Schreb.) by ABA was through the regulation of HSFs and HSPs. ABA-responsive transcriptional factors, ABA-responsive element binding protein 3 (FaAREB3) and dehydration-responsive element binding protein 2A (FaDREB2A) of tall fescue, were able to bind to the cis-elements in the promoter of tall fescue heat stress transcription factor A2c (FaHSFA2c)...
September 15, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28910785/oral-tolerization-with-mycobacterial-heat-shock-protein-65-reduces-chronic-experimental-atherosclerosis-in-aged-mice
#9
Cecilia Wick, Elisabeth Onestingel, Egon Demetz, Hermann Dietrich, Georg Wick
BACKGROUND: Atherosclerosis is a chronic inflammatory disease of the artery wall where both innate and adaptive immunity play important roles. Modulation of the immune response against the stress protein antigen, heat shock protein (HSP) 60, by administration of mycobacterial HSP65 (mbHSP65) orally and/or nasally shows promising therapeutic results in young animals in the sense of less severe experimental atherosclerosis; however, the case of aged animals with already established atherosclerosis has so far never been investigated...
September 15, 2017: Gerontology
https://www.readbyqxmd.com/read/28904958/transcriptomic-analysis-reveals-genes-mediating-salt-tolerance-through-calcineurin-ccha-independent-signaling-in-aspergillus-nidulans
#10
Sha Wang, Hongchang Zhou, Jun Wu, Jiangyu Han, Shasha Li, Shengwen Shao
Adaptation to changes in the environment is crucial for the viability of all organisms. Although the importance of calcineurin in the stress response has been highlighted in filamentous fungi, little is known about the involvement of ion-responsive genes and pathways in conferring salt tolerance without calcium signaling. In this study, high-throughput RNA-seq was used to investigate salt stress-induced genes in the parent, ΔcnaB, and ΔcnaBΔcchA strains of Aspergillus nidulans, which differ greatly in salt adaption...
2017: BioMed Research International
https://www.readbyqxmd.com/read/28902865/optimization-of-the-expression-purification-and-polymerase-activity-reaction-conditions-of-recombinant-human-primpol
#11
Elizaveta O Boldinova, Gorazd Stojkovič, Rafil Khairullin, Sjoerd Wanrooij, Alena V Makarova
Human PrimPol is a DNA primase/polymerase involved in DNA damage tolerance and prevents nuclear genome instability. PrimPol is also localized to the mitochondria, but its precise function in mitochondrial DNA maintenance has remained elusive. PrimPol works both as a translesion (TLS) polymerase and as the primase that restarts DNA replication after a lesion. However, the observed biochemical activities of PrimPol vary considerably between studies as a result of different reaction conditions used. To reveal the effects of reaction composition on PrimPol DNA polymerase activity, we tested the polymerase activity in the presence of various buffer agents, salt concentrations, pH values and metal cofactors...
2017: PloS One
https://www.readbyqxmd.com/read/28902449/enzyme-encapsulation-by-a-ferritin-cage
#12
Stephan Tetter, Donald Hilvert
Ferritins, conserved across all kingdoms of life, are protein nanocages that evolved to mineralize iron. The last several decades have shown that these cages have considerable technological and medical potential owing to their stability and tolerance to modification, as well as their ability to template nanoparticle synthesis and incorporate small molecules. Here we show that it is possible to encapsulate proteins in a ferritin by exploiting electrostatic interactions with the negatively charged interior of the cage...
September 13, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28901432/effects-of-coadministration-of-low-dose-cannabinoid-type-2-receptor-agonist-and-morphine-on-vanilloid-receptor-1-expression-in-a-rat-model-of-cancer-pain
#13
Mingyue Zhang, Meng Chi, Huichao Zou, Songyu Tian, Zhaodi Zhang, Guonian Wang
Morphine is widely used as an analgesic to treat moderate to severe pain, but chronic morphine use is associated with development of tolerance and dependence, which limits its analgesic efficacy. Our previous research has showed that nonanalgetic dose of a cannabinoid type 2 (CB2) receptor agonist reduced morphine tolerance in cancer pain. A previous study showed the colocalization of CB2 and transient receptor potential vanilloid 1 (TRPV1) in human and rat dorsal root ganglia (DRG) sensory neurons. Whether coadministration of a CB2 receptor agonist and morphine could reduce TRPV1 expression in morphine‑induced antinociception and tolerance in cancer pain is unclear...
September 13, 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28900441/bacillus-amyloliquefaciens-confers-tolerance-to-various-abiotic-stresses-and-modulates-plant-response-to-phytohormones-through-osmoprotection-and-gene-expression-regulation-in-rice
#14
Shalini Tiwari, Vivek Prasad, Puneet S Chauhan, Charu Lata
Being sessile in nature, plants have to withstand various adverse environmental stress conditions including both biotic and abiotic stresses. Comparatively, abiotic stresses such as drought, salinity, high temperature, and cold pose major threat to agriculture by negatively impacting plant growth and yield worldwide. Rice is one of the most widely consumed staple cereals across the globe, the production and productivity of which is also severely affected by different abiotic stresses. Therefore, several crop improvement programs are directed toward developing stress tolerant rice cultivars either through marker assisted breeding or transgenic technology...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28900229/a-class-ii-small-heat-shock-protein-oshsp18-0-plays-positive-roles-in-both-biotic-and-abiotic-defense-responses-in-rice
#15
Jie Kuang, Jianzhong Liu, Jun Mei, Changchun Wang, Haitao Hu, Yanjun Zhang, Meihao Sun, Xi Ning, Langtao Xiao, Ling Yang
Bacterial blight caused by Xanthomonas oryzae pv. oryzae (Xoo) is one of the most devastating diseases of rice. However, the molecular mechanism underpinning the Xoo resistance of rice is still not fully understood. Here, we report that a class II small heat shock protein gene, OsHsp18.0, whose expression was differentially induced between a resistant and a susceptible variety in response to Xoo infection, plays positive roles in both biotic and abiotic resistance. The molecular chaperone activity of OsHsp18...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28891869/chronic-exposure-to-insufficient-sleep-alters-processes-of-pain-habituation-and-sensitization
#16
Norah S Simpson, Jennifer Scott-Sutherland, Shiva Gautam, Navil Sethna, Monika Haack
Chronic pain conditions are highly co-morbid with insufficient sleep. While the mechanistic relationships between the two are not understood, chronic insufficient sleep may be one pathway through which central pain-modulatory circuits deteriorate, thereby contributing to chronic pain vulnerability over time. To test this hypothesis, an in-laboratory model of three weeks of restricted sleep with limited recovery (five nights of 4-hour sleep/night followed by two nights of 8-hour sleep/night) was compared to three weeks of 8-hour sleep/night (control protocol)...
September 1, 2017: Pain
https://www.readbyqxmd.com/read/28889352/characterization-of-a-novel-zinc-finger-transcription-factor-taznf-from-wheat-conferring-heat-stress-tolerance-in-arabidopsis
#17
Preeti Agarwal, Paramjit Khurana
C3HC4-type zinc finger proteins are known to play important roles in various plant processes including regulation of growth and development, signaling networks, responses to abiotic stresses etc. The current study identifies and explores the involvement of TaZnF in plant stress response, mainly heat stress. TaZnF belongs to C4HC3-type zinc finger transcription factor. Phylogenetic analysis of TaZnF revealed strong sequence similarity to Brachypodium distachyon, a model system for crop species. Gene expression studies have revealed its role under diverse stress conditions including heat and cold conditions...
September 9, 2017: Cell Stress & Chaperones
https://www.readbyqxmd.com/read/28888771/c-terminal-hydrazide-modification-changes-the-spinal-antinociceptive-profiles-of-endomorphins-in-mice
#18
Chang-Lin Wang, Dai-Jun Yang, Bi-Yu Yuan, Yu Wang
Previously, we have demonstrated that endomorphins (EMs) analogs with C-terminal hydrazide modification retained the μ-opioid receptor affinity and selectivity, and exhibited potent antinociception after intracerebroventricular (i.c.v.) administration. In the present study, we extended our studies to evaluate the antinociceptive profiles of EMs and their analogs EM-1-NHNH2, EM-2-NHNH2 given spinally in the radiant heat paw withdrawal test. Following intrathecal (i.t.) administration, EM-1, EM-2, EM-1-NHNH2 and EM-2-NHNH2 dose-dependently increased the latency for paw withdrawal response...
September 6, 2017: Peptides
https://www.readbyqxmd.com/read/28885603/functional-characterization-of-selected-universal-stress-protein-from-salvia-miltiorrhiza-smusp-in-escherichia-coli
#19
Xiao-Fan Wang, Jiao Su, Na Yang, Hui Zhang, Xiao-Yan Cao, Jie-Fang Kang
The multigene universal stress protein (USP) family is evolutionarily conserved. Members play indispensable roles in plant tolerance to abiotic stresses. Although relatively well-characterized in model plants, such as Arabidopsis thaliana and Oryzasativa, this family has not been investigated in Salvia miltiorrhiza, an important herbal plant for which yields can be limited by various abiotic stresses. Here, we identified 32 USP family members in the S. miltiorrhiza genome, and used phylogenetic analysis to sort these SmUSPs into four groups...
September 8, 2017: Genes
https://www.readbyqxmd.com/read/28884419/identification-of-hsp70-gene-in-corythucha-ciliata-and-its-expression-profiles-under-laboratory-and-field-thermal-conditions
#20
Rui-Ting Ju, Qing-Quan Luo, Lei Gao, Ji Yang, Bo Li
Previous laboratory studies have demonstrated that insects can tolerate high temperatures by expressing inducible heat shock proteins (HSPs). This HSP-based tolerance, however, has seldom been studied under field conditions. Here, we cloned the HSP70 gene of Corythucha ciliata (Cchsp70), an invasive insect species with substantial thermal tolerance in subtropical China. We also compared the relative mRNA expression levels of Cchsp70 in response to controlled temperature treatments (2 h at 33-43 °C at 2 °C intervals in the laboratory) and to natural increases in temperature (08:00-14:00 at 2-h intervals, 29...
September 7, 2017: Cell Stress & Chaperones
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