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https://www.readbyqxmd.com/read/29145593/root-respiratory-burst-oxidase-homologue-dependent-h2o2-production-confers-salt-tolerance-on-a-grafted-cucumber-by-controlling-na-exclusion-and-stomatal-closure
#1
Mengliang Niu, Yuan Huang, Shitao Sun, Jingyu Sun, Haishun Cao, Sergey Shabala, Zhilong Bie
Plant salt tolerance can be improved by grafting onto salt-tolerant rootstocks. However, the underlying signaling mechanisms behind this phenomenon remain largely unknown. To address this issue, we used a range of physiological and molecular techniques to study responses of self-grafted and pumpkin-grafted cucumber plants exposed to 75 mM NaCl stress. Pumpkin grafting significantly increased the salt tolerance of cucumber plants, as revealed by higher plant dry weight, chlorophyll content and photochemical efficiency (Fv/Fm), and lower leaf Na+ content...
November 14, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29145496/insights-into-soybean-transcriptome-reconfiguration-under-hypoxic-stress-functional-regulatory-structural-and-compositional-characterization
#2
Thiago J Nakayama, Fabiana A Rodrigues, Norman Neumaier, Juliana Marcolino-Gomes, Hugo B C Molinari, Thaís R Santiago, Eduardo F Formighieri, Marcos F Basso, José R B Farias, Beatriz M Emygdio, Ana C B de Oliveira, Ângela D Campos, Aluízio Borém, Frank G Harmon, Liliane M Mertz-Henning, Alexandre L Nepomuceno
Soybean (Glycine max) is one of the major crops worldwide and flooding stress affects the production and expansion of cultivated areas. Oxygen is essential for mitochondrial aerobic respiration to supply the energy demand of plant cells. Because oxygen diffusion in water is 10,000 times lower than in air, partial (hypoxic) or total (anoxic) oxygen deficiency is important component of flooding. Even when oxygen is externally available, oxygen deficiency frequently occurs in bulky, dense or metabolically active tissues such as phloem, meristems, seeds, and fruits...
2017: PloS One
https://www.readbyqxmd.com/read/29144389/effects-of-infrared-optical-trapping-on-saccharomyces-cerevisiae-in-a-microfluidic-system
#3
Zdeněk Pilát, Alexandr Jonáš, Jan Ježek, Pavel Zemánek
Baker's yeast (Saccharomyces cerevisiae) represents a very popular single-celled eukaryotic model organism which has been studied extensively by various methods and whose genome has been completely sequenced. It was also among the first living organisms that were manipulated by optical tweezers and it is currently a frequent subject of optical micromanipulation experiments. We built a microfluidic system for optical trapping experiments with individual cells and used it for the assessment of cell tolerance to phototoxic stress...
November 16, 2017: Sensors
https://www.readbyqxmd.com/read/29143606/metabolic-pathways-and-genes-identified-by-rna-seq-analysis-of-barley-near-isogenic-lines-differing-by-allelic-state-of-the-black-lemma-and-pericarp-blp-gene
#4
Anastasiya Y Glagoleva, Nikolay A Shmakov, Olesya Y Shoeva, Gennady V Vasiliev, Natalia V Shatskaya, Andreas Börner, Dmitry A Afonnikov, Elena K Khlestkina
BACKGROUND: Some plant species have 'melanin-like' black seed pigmentation. However, the chemical and genetic nature of this 'melanin-like' black pigment have not yet been fully explored due to its complex structure and ability to withstand almost all solvents. Nevertheless, identification of genetic networks participating in trait formation is key to understanding metabolic processes involved in the expression of 'melanin-like' black seed pigmentation. The aim of the current study was to identify differentially expressed genes (DEGs) in barley near-isogenic lines (NILs) differing by allelic state of the Blp (black lemma and pericarp) locus...
November 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29143265/is-caenorhabditis-elegans-representative-of-freshwater-nematode-species-in-toxicity-testing
#5
Arne Haegerbaeumer, Sebastian Höss, Peter Heininger, Walter Traunspurger
Multi-species toxicity tests were conducted using a broad range of freshwater nematode species to assess interspecific differences in sensitivity to chemical stress and to compare the toxicity to that on the standard test organism Caenorhabditis elegans. The lethal effects of nine different chemical treatments, including metals and polycyclic aromatic hydrocarbons (PAHs) in single and mixture application, were determined for nematodes exposed for 48 h to spiked aqueous solutions. The investigated freshwater nematodes exhibited distinct differences in their sensitivity...
November 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29141604/genome-wide-identification-of-mirnas-and-lncrnas-in-cajanus-cajan
#6
Chandran Nithin, Amal Thomas, Jolly Basak, Ranjit Prasad Bahadur
BACKGROUND: Non-coding RNAs (ncRNAs) are important players in the post transcriptional regulation of gene expression (PTGR). On one hand, microRNAs (miRNAs) are an abundant class of small ncRNAs (~22nt long) that negatively regulate gene expression at the levels of messenger RNAs stability and translation inhibition, on the other hand, long ncRNAs (lncRNAs) are a large and diverse class of transcribed non-protein coding RNA molecules (> 200nt) that play both up-regulatory as well as down-regulatory roles at the transcriptional level...
November 15, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29140437/metabolite-profiling-at-the-cellular-and-subcellular-level-reveals-metabolites-associated-with-salinity-tolerance-in-sugar-beet
#7
M Sazzad Hossain, Marcus Persicke, Abdelaleim Ismail ElSayed, Jörn Kalinowski, Karl-Josef Dietz
Sugar beet is among the most salt-tolerant crops. This study aimed to investigate the metabolic adaptation of sugar beet to salt stress at the cellular and subcellular levels. Seedlings were grown hydroponically and subjected to stepwise increases in salt stress up to 300 mM NaCl. Highly enriched fractions of chloroplasts were obtained by non-aqueous fractionation using organic solvents. Total leaf metabolites and metabolites in chloroplasts were profiled at 3 h and 14 d after reaching the maximum salinity stress of 300 mM NaCl...
November 11, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29140297/a-proteomic-approach-to-investigate-the-drought-response-in-the-orphan-crop-eragrostis-tef
#8
Rizqah Kamies, Jill M Farrant, Zerihun Tadele, Gina Cannarozzi, Mohammed Suhail Rafudeen
The orphan crop, Eragrostis tef, was subjected to controlled drought conditions to observe the physiological parameters and proteins changing in response to dehydration stress. Physiological measurements involving electrolyte leakage, chlorophyll fluorescence and ultra-structural analysis showed tef plants tolerated water loss to 50% relative water content (RWC) before adverse effects in leaf tissues were observed. Proteomic analysis using isobaric tag for relative and absolute quantification (iTRAQ) mass spectrometry and appropriate database searching enabled the detection of 5727 proteins, of which 211 proteins, including a number of spliced variants, were found to be differentially regulated with the imposed stress conditions...
November 15, 2017: Proteomes
https://www.readbyqxmd.com/read/29139111/a-retrotransposon-in-an-hkt1-family-sodium-transporter-causes-variation-of-leaf-na-exclusion-and-salt-tolerance-in-maize
#9
Ming Zhang, Yibo Cao, Zhiping Wang, Zhi-Qiang Wang, Junpeng Shi, Xiaoyan Liang, Weibin Song, Qijun Chen, Jinsheng Lai, Caifu Jiang
Soil salinity is one of several major abiotic stresses that constrain maize productivity worldwide. An improved understanding of salt-tolerance mechanisms will thus enhance the breeding of salt-tolerant maize and boost productivity. Previous studies have indicated that the maintenance of leaf Na(+) concentration is essential for maize salt tolerance, and the difference in leaf Na(+) exclusion has previously been associated with variation in salt tolerance between maize varieties. Here, we report the identification and functional characterization of a maize salt-tolerance quantitative trait locus (QTL), Zea mays Na(+) Content1 (ZmNC1), which encodes an HKT-type transporter (designated as ZmHKT1)...
November 15, 2017: New Phytologist
https://www.readbyqxmd.com/read/29138306/key-metabolites-and-mechanistic-changes-for-salt-tolerance-in-an-experimentally-evolved-sulfate-reducing-bacterium-desulfovibrio-vulgaris
#10
Aifen Zhou, Rebecca Lau, Richard Baran, Jincai Ma, Frederick von Netzer, Weiling Shi, Drew Gorman-Lewis, Megan L Kempher, Zhili He, Yujia Qin, Zhou Shi, Grant M Zane, Liyou Wu, Benjamin P Bowen, Trent R Northen, Kristina L Hillesland, David A Stahl, Judy D Wall, Adam P Arkin, Jizhong Zhou
Rapid genetic and phenotypic adaptation of the sulfate-reducing bacterium Desulfovibrio vulgaris Hildenborough to salt stress was observed during experimental evolution. In order to identify key metabolites important for salt tolerance, a clone, ES10-5, which was isolated from population ES10 and allowed to experimentally evolve under salt stress for 5,000 generations, was analyzed and compared to clone ES9-11, which was isolated from population ES9 and had evolved under the same conditions for 1,200 generations...
November 14, 2017: MBio
https://www.readbyqxmd.com/read/29138224/short-term-metformin-and-exercise-training-effects-on-strength-aerobic-capacity-glycemic-control-and-mitochondrial-function-in-children-with-burn-injury
#11
Eric Rivas, David N Herndon, Craig Porter, Walter Meyer, Oscar E Suman
Severely burned children experience a chronic state of sympathetic nervous system activation that is associated with hypermetabolic/cardiac stress and muscle wasting. Metformin, a diabetes medication, helps control hyperglycemia in diabetic populations, and exercise has been shown to improve exercise strength and aerobic exercise capacity after severe burns. However, whether exercise improves glycemic control in burned children and whether combining exercise and metformin improves outcomes to a greater degree than exercise alone is unknown...
November 14, 2017: American Journal of Physiology. Endocrinology and Metabolism
https://www.readbyqxmd.com/read/29138211/transcriptome-sequencing-of-the-naked-mole-rat-heterocephalus-glaber-and-identification-of-hypoxia-tolerance-genes
#12
Bang Xiao, Li Li, Chang Xu, Shanmin Zhao, Lifang Lin, Jishuai Cheng, Wenjing Yang, Wei Cong, Guanghan Kan, Shufang Cui
The naked mole rat (NMR; Heterocephalus glaber) is a small rodent species found in regions of Kenya, Ethiopia and Somalia. It has a high tolerance for hypoxia and is thus, considered one of the most important natural models for studying hypoxia tolerance mechanisms. The various mechanisms underlying the NMR's hypoxia tolerance are beginning to be understood at different levels of organization, and next-generation sequencing methods promise to expand this understanding to the level of gene expression. In this study, we examined the sequence and transcript abundance data of the muscle transcriptome of NMRs exposed to hypoxia using the Illumina HiSeq 2500 system to clarify the possible genomic adaptive responses to the hypoxic underground surroundings...
November 14, 2017: Biology Open
https://www.readbyqxmd.com/read/29137233/outcome-of-patients-treated-for-myelodysplastic-syndromes-with-5q-deletion-after-failure-of-lenalidomide-therapy
#13
Thomas Prebet, Thomas Cluzeau, Sophie Park, Mikkael A Sekeres, Ulrich Germing, Lionel Ades, Uwe Platzbecker, Katharina Gotze, Norbert Vey, Esther Oliva, Mary M Sugrue, Cecile Bally, Charikleia Kelaidi, Najla Al Ali, Pierre Fenaux, Steven D Gore, Rami Komrokji
While lenalidomide (LEN) is the standard of care for the lower-risk myelodysplastic syndromes (MDS) patients with deletion 5q, 35% will not respond to or do not tolerate the drug. Moreover, most of the patients will lose their response after a few years. Defining the outcome of patients with LEN failure and determining the impact of subsequent therapies is therefore important to develop alternative strategies. Based on an international collaboration, we were able to compile a total of 392 patient cases of lower-risk MDS patients with 5q deletion and to analyze their outcome after failure of lenalidomide...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29133823/identification-of-mirna-mediated-drought-responsive-multi-tiered-regulatory-network-in-drought-tolerant-rice-nagina-22
#14
Sonia Balyan, Mukesh Kumar, Roseeta Devi Mutum, Utkarsh Raghuvanshi, Priyanka Agarwal, Saloni Mathur, Saurabh Raghuvanshi
Comparative characterization of microRNA-mediated stress regulatory networks in contrasting rice cultivars is critical to decipher plant stress response. Consequently, a multi-level comparative analysis, using sRNA sequencing, degradome analysis, enzymatic and metabolite assays and metal ion analysis, in drought tolerant and sensitive rice cultivars was conducted. The study identified a group of miRNAs "Cultivar-specific drought responsive" (CSDR)-miRNAs (osa-miR159f, osa-miR1871, osa-miR398b, osa-miR408-3p, osa-miR2878-5p, osa-miR528-5p and osa-miR397a) that were up-regulated in the flag-leaves of tolerant cultivar, Nagina 22 (N22) and Vandana, but down-regulated in the sensitive cultivar, Pusa Basmati 1 (PB1) and IR64, during drought...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29132026/integrated-omics-analysis-of-root-preferred-genes-across-diverse-rice-varieties-including-japonica-and-indica-cultivars
#15
Sunok Moon, Anil Kumar Nalini Chandran, Yun-Shil Gho, Sun-A Park, Sung-Ryul Kim, Yo-Han Yoo, Ki-Hong Jung
Plant root systems play essential roles in developmental processes, such as the absorption of water and inorganic nutrients, and structural support. Gene expression is affected by growth conditions and the genetic background of plants. To identify highly conserved root-preferred genes in rice across diverse growth conditions and varieties, we used two independent meta-anatomical expression profiles based on a large collection of Affymetrix and Agilent 44K microarray data sets available for public use. We then identified 684 loci with root-preferred expression, which were validated with in silico analysis using both meta-expression profiles...
October 26, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29131867/differential-transcriptome-analysis-reveals-genes-related-to-cold-tolerance-in-seabuckthorn-carpenter-moth-eogystia-hippophaecolus
#16
Mingming Cui, Ping Hu, Tao Wang, Jing Tao, Shixiang Zong
Seabuckthorn carpenter moth, Eogystia hippophaecolus (Lepidoptera: Cossidae), is an important pest of sea buckthorn (Hippophae rhamnoides), which is a shrub that has significant ecological and economic value in China. E. hippophaecolus is highly cold tolerant, but limited studies have been conducted to elucidate the molecular mechanisms underlying its cold resistance. Here we sequenced the E. hippophaecolus transcriptome using RNA-Seq technology and performed de novo assembly from the short paired-end reads...
2017: PloS One
https://www.readbyqxmd.com/read/29131853/transcriptome-analysis-of-crossostephium-chinensis-provides-insight-into-the-molecular-basis-of-salinity-stress-responses
#17
Haiyan Yang, Ming Sun, Shuangji Lin, Yanhong Guo, Yongjuan Yang, Tengxun Zhang, Jingxing Zhang
Soil salinization is becoming a limitation to the utilization of ornamental plants worldwide. Crossostephium chinensis (Linnaeus) Makino is often cultivated along the southeast coast of China for its desirable ornamental qualities and high salt tolerance. However, little is known about the genomic background of the salt tolerance mechanism in C. chinensis. In the present study, we used Illumina paired-end sequencing to systematically investigate leaf transcriptomes derived from C. chinensis seedlings grown under normal conditions and under salt stress...
2017: PloS One
https://www.readbyqxmd.com/read/29131301/genome-wide-identification-of-tolerance-mechanisms-towards-p-coumaric-acid-in-pseudomonas-putida
#18
Patricia Calero, Sheila I Jensen, Klara Bojanovič, Rebecca Lennen, Anna Koza, Alex T Nielsen
The soil bacterium Pseudomonas putida KT2440 has gained increasing biotechnological interest due to its ability to tolerate different types of stress. Here, the tolerance of P. putida KT2440 towards eleven toxic chemical compounds was investigated. P. putida was found to be significantly more tolerant towards three of the eleven compounds when compared to Escherichia coli. Increased tolerance was for example found towards p-coumaric acid, an interesting precursor for polymerization with a significant industrial relevance...
November 13, 2017: Biotechnology and Bioengineering
https://www.readbyqxmd.com/read/29131240/mirtogenol%C3%A2-supplementation-in-association-with-dorzolamide-timolol-or-latanoprost-improves-the-retinal-microcirculation-in-asymptomatic-patients-with-increased-ocular-pressure
#19
C Gizzi, P Torino-Rodriguez, G Belcaro, S Hu, M Hosoi, B Feragalli
OBJECTIVE: Supplementation with Mirtogenol® improves the retinal microcirculation and reduces intraocular pressure (IOP) in ocular hypertension, when administrated either alone or in association with an ophthalmic solution (latanoprost). In this study, microcirculatory parameters (perfusion of the circle of Zinn-Haller and retinal circulation) and oxidative stress were tested to assess the effects of Mirtogenol® plus traditional antihypertensive drugs in patients with elevated IOP. PATIENTS AND METHODS: 88 otherwise healthy patients with increased IOP were followed-up in a supplement registry for 12 weeks...
October 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/29129987/increasing-the-fungicidal-action-of-amphotericin-b-by-inhibiting-the-nitric-oxide-dependent-tolerance-pathway
#20
Kim Vriens, Phalguni Tewari Kumar, Caroline Struyfs, Tanne L Cools, Pieter Spincemaille, Tadej Kokalj, Belém Sampaio-Marques, Paula Ludovico, Jeroen Lammertyn, Bruno P A Cammue, Karin Thevissen
Amphotericin B (AmB) induces oxidative and nitrosative stresses, characterized by production of reactive oxygen and nitrogen species, in fungi. Yet, how these toxic species contribute to AmB-induced fungal cell death is unclear. We investigated the role of superoxide and nitric oxide radicals in AmB's fungicidal activity in Saccharomyces cerevisiae, using a digital microfluidic platform, which enabled monitoring individual cells at a spatiotemporal resolution, and plating assays. The nitric oxide synthase inhibitor L-NAME was used to interfere with nitric oxide radical production...
2017: Oxidative Medicine and Cellular Longevity
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