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https://www.readbyqxmd.com/read/28637347/mechanisms-underlying-the-long-term-survival-of-the-monocot-dracaena-marginata-under-drought-conditions
#1
Radek Jupa, Roman Plichta, Zuzana Paschová, Nadezhda Nadezhdina, Roman Gebauer
Efficient water management is essential for the survival of vascular plants under drought stress. While interrelations among drought stress, plant anatomy and physiological functions have been described in woody dicots, similar research is very limited for non-palm arborescent and shrubby monocots despite their generally high drought tolerance. In this study, potted transplants of Dracaena marginata Lam. in primary growth stage were exposed to several short- and long-term drought periods. Continuous measurements of sap flow and stem diameter, the evaluation of capacitance and leaf conductance, the quantification of non-structural carbohydrates (NSC), and organ-specific anatomical analyses were performed to reveal the mechanisms promoting plant resistance to limited soil moisture...
June 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28637218/genome-wide-characterization-and-expression-analysis-enables-identification-of-abiotic-stress-responsive-myb-transcription-factors-in-cassava-manihot-esculenta
#2
Meng-Bin Ruan, Xin Guo, Bin Wang, Yi-Ling Yang, Wen-Qi Li, Xiao-Ling Yu, Peng Zhang, Ming Peng
The myeloblastosis (MYB) transcription factor superfamily is the largest transcription factor family in plants, playing different roles during stress response. However, abiotic stress-responsive MYB transcription factors have not been systematically studied in cassava (Manihot esculenta), an important tropical tuber root crop. In this study, we used a genome-wide transcriptome analysis to predict 299 putative MeMYB genes in the cassava genome. Under drought and cold stresses, many MeMYB genes exhibited different expression patterns in cassava leaves, indicating that these genes might play a role in abiotic stress responses...
June 20, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28637217/experimental-support-that-natural-selection-has-shaped-the-latitudinal-distribution-of-mitochondrial-haplotypes-in-australian-drosophila-melanogaster
#3
M Florencia Camus, Jonci N Wolff, Carla M Sgrò, Damian K Dowling
Cellular metabolism is regulated by enzyme complexes within the mitochondrion, the function of which are sensitive to the prevailing temperature. Such thermal sensitivity, coupled with the observation that population frequencies of mitochondrial haplotypes tend to associate with latitude, altitude or climatic regions across species distributions, led to the hypothesis that thermal selection has played a role in shaping standing variation in the mitochondrial DNA (mtDNA) sequence. This hypothesis, however, remains controversial, and requires evidence that the distribution of haplotypes observed in nature corresponds with the capacity of these haplotypes to confer differences in thermal tolerance...
June 20, 2017: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/28636266/marap2-4-a-waterlogging-responsive-erf-from-mentha-regulates-bidirectional-sugar-transporter-atsweet10-to-modulate-stress-response-in-arabidopsis
#4
Ujjal J Phukan, Gajendra Singh Jeena, Vineeta Tripathi, Rakesh Kumar Shukla
As waterlogging and successive events severely influence growth and development of economically important plants, we attempted to characterize the role of a waterlogging-responsive Group I (A-6) Ethylene response factor (MaRAP2-4) from Mentha arvensis. Waterlogging, ethylene and Methyl jasmonate rapidly induced the expression of MaRAP2-4. MaRAP2-4 interacted with multiple cis-elements like Dehydration response elements (DRE1/2), Anoxia/Jasmonic acid response element (JARE) and GCC box showing its involvement in multiple responses...
June 21, 2017: Plant Biotechnology Journal
https://www.readbyqxmd.com/read/28636204/aerobic-exercise-training-for-adults-with-fibromyalgia
#5
REVIEW
Julia Bidonde, Angela J Busch, Candice L Schachter, Tom J Overend, Soo Y Kim, Suelen M Góes, Catherine Boden, Heather Ja Foulds
BACKGROUND: Exercise training is commonly recommended for individuals with fibromyalgia. This review is one of a series of reviews about exercise training for people with fibromyalgia that will replace the "Exercise for treating fibromyalgia syndrome" review first published in 2002. OBJECTIVES: • To evaluate the benefits and harms of aerobic exercise training for adults with fibromyalgia• To assess the following specific comparisons ० Aerobic versus control conditions (eg, treatment as usual, wait list control, physical activity as usual) ० Aerobic versus aerobic interventions (eg, running vs brisk walking) ० Aerobic versus non-exercise interventions (eg, medications, education) We did not assess specific comparisons involving aerobic exercise versus other exercise interventions (eg, resistance exercise, aquatic exercise, flexibility exercise, mixed exercise)...
June 21, 2017: Cochrane Database of Systematic Reviews
https://www.readbyqxmd.com/read/28635628/identification-and-validation-of-reference-genes-for-seashore-paspalum-response-to-abiotic-stresses
#6
Yu Liu, Jun Liu, Lei Xu, Hui Lai, Yu Chen, Zhimin Yang, Bingru Huang
Seashore paspalum (Paspalum vaginatum) is among the most salt- and cadmium-tolerant warm-season perennial grass species widely used as turf or forage. The objective of this study was to select stable reference genes for quantitative real-time polymerase chain reaction (qRT-PCR) analysis of seashore paspalum in response to four abiotic stresses. The stability of 12 potential reference genes was evaluated by four programs (geNorm, NormFinder, BestKeeper, and RefFinder). U2AF combined with glyceraldehyde-3-phosphate dehydrogenase (GAPDH) showed stable expression in Cd-treated leaves and cold-treated roots...
June 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28634850/novel-vitamin-b12-producing-enterococcus-spp-and-preliminary-in-vitro-evaluation-of-probiotic-potentials
#7
Ping Li, Qing Gu, Yuejiao Wang, Yue Yu, Lanlan Yang, Jieyan V Chen
Vitamin B12 is an essential nutrient required for crucial metabolic processes in humans. Vitamin B12-producing lactic acid bacteria (LAB) have been attracting increased attentions currently because of the generally recognized as safe (GRAS) status. Most of recent studies focused on Lactobacillus, and little is known about B12-producing Enterococcus. In the present study, five Enterococcus strains isolated from infant feces were identified as vitamin B12 producers. Among them, Enterococcus faecium LZ86 had the highest B12 production (499...
June 20, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28634682/searching-for-the-sweet-spot-the-foot-rotation-and-parallel-engagement-of-ankle-ligaments-in-maximizing-injury-tolerance
#8
Bingbing Nie, Jason L Forman, Alexander R Mait, John-Paul Donlon, Matthew B Panzer, Richard W Kent
Ligament sprains, defined as tearing of bands of fibrous tissues within ligaments, account for a majority of injuries to the foot and ankle complex in field-based sports. External rotation of the foot is considered the primary injury mechanism of syndesmotic ankle sprains with concomitant flexion and inversion/eversion associated with particular patterns of ligament trauma. However, the influence of the magnitude and direction of loading vectors to the ankle on the in situ stress state of the ligaments has not been quantified in the literature...
June 20, 2017: Biomechanics and Modeling in Mechanobiology
https://www.readbyqxmd.com/read/28634483/elicitor-induced-biochemical-and-molecular-manifestations-to-improve-drought-tolerance-in-rice-oryza-sativa-l-through-seed-priming
#9
Mahesh K Samota, Minnu Sasi, Monika Awana, Om P Yadav, S V Amitha Mithra, Aruna Tyagi, Suresh Kumar, Archana Singh
Rice (Oryza sativa L.) is one of the major grain cereals of the Indian subcontinent which face water-deficit stress for their cultivation. Seed-priming has been reported to be a useful approach to complement stress responses in plants. In the present study, seed-priming with hormonal or chemical elicitor [viz. methyl jasmonate (MJ), salicylic acid (SA), paclobutrazol (PB)] showed significant increase in total phenolic content, antioxidant activity and expression of Rice Drought-responsive (RD1 and RD2) genes (of AP2/ERF family) in contrasting rice genotypes (Nagina-22, drought-tolerant and Pusa Sugandh-5, drought-sensitive) under drought stress...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28633427/genotypic-variation-in-tolerance-to-drought-stress-is-highly-coordinated-with-hydraulic-conductivity-photosynthesis-interplay-and-aquaporin-expression-in-field-grown-mulberry-morus-spp
#10
Kanubothula Sitarami Reddy, Kalva Madhana Sekhar, Attipalli Ramachandra Reddy
Hydraulic conductivity quantifies the efficiency of a plant to transport water from root to shoot and is a major constriction on leaf gas exchange physiology. Mulberry (Morus spp.) is the most economically important crop for sericulture industry. In this study, we demonstrate a finely coordinated control of hydraulic dynamics on leaf gas exchange characteristics in 1-year-old field-grown mulberry genotypes (Selection-13 (S13); Kollegal Local (KL) and Kanva-2 (K2)) subjected to water stress by withholding water for 20 days and subsequent recovery for 7 days...
June 14, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28633360/expression-properties-exhibit-correlated-patterns-with-the-fate-of-duplicated-genes-their-divergence-and-transcriptional-plasticity-in-saccharomycotina
#11
Florian Mattenberger, Beatriz Sabater-Muñoz, Christina Toft, Gaurav Sablok, Mario A Fares
Gene duplication is an important source of novelties and genome complexity. What genes are preserved as duplicated through long evolutionary times can shape the evolution of innovations. Identifying factors that influence gene duplicability is therefore an important aim in evolutionary biology. Here, we show that in the yeast Saccharomyces cerevisiae the levels of gene expression correlate with gene duplicability, its divergence, and transcriptional plasticity. Genes that were highly expressed before duplication are more likely to be preserved as duplicates for longer evolutionary times and wider phylogenetic ranges than genes that were lowly expressed...
June 15, 2017: DNA Research: An International Journal for Rapid Publication of Reports on Genes and Genomes
https://www.readbyqxmd.com/read/28633353/modulating-role-of-ros-in-re-establishing-desiccation-tolerance-in-germinating-seeds-of-caragana-korshinskii-kom
#12
Long Peng, Sirui Lang, Yu Wang, Hugh W Pritchard, Xiaofeng Wang
In close agreement with visible germination, orthodox seeds lose desiccation tolerance (DT). This trait can be regained under osmotic stress, but the mechanisms are poorly understood. In this study, germinating seeds of Caragana korshinskii Kom. were investigated, focusing on the potential modulating roles of reactive oxygen species (ROS) in the re-establishment of DT. Germinating seeds with 2 mm long radicles can be rendered tolerant to desiccation by incubation in a polyethylene glycol (PEG) solution (-1...
June 15, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28633295/long-cold-exposure-induces-transcriptional-and-biochemical-remodelling-of-xylem-secondary-cell-wall-in-eucalyptus
#13
Raphael Ployet, Marçal Soler, Victor Carocha, Nathalie Ladouce, Ana Alves, José-Carlos Rodrigues, Luc Harvengt, Christiane Marque, Chantal Teulières, Jacqueline Grima-Pettenati, Fabien Mounet
Although eucalypts are the most planted hardwood trees worldwide, the majority of them are frost sensitive. The recent creation of frost-tolerant hybrids such as Eucalyptus gundal plants (E. gunnii × E. dalrympleana hybrids), now enables the development of industrial plantations in northern countries. Our objective was to evaluate the impact of cold on the wood structure and composition of these hybrids, and on the biosynthetic and regulatory processes controlling their secondary cell-wall (SCW) formation...
June 13, 2017: Tree Physiology
https://www.readbyqxmd.com/read/28633111/drought-avoiding-plants-with-low-water-use-can-achieve-high-rainfall-retention-without-jeopardising-survival-on-green-roofs
#14
Christopher Szota, Claire Farrell, Nicholas S G Williams, Stefan K Arndt, Tim D Fletcher
Green roofs are increasingly being used among the suite of tools designed to reduce the volume of surface water runoff generated by cities. Plants provide the primary mechanism for restoring the rainfall retention capacity of green roofs, but selecting plants with high water use is likely to increase drought stress. Using empirically-derived plant physiological parameters, we used a water balance model to assess the trade-off between rainfall retention and plant drought stress under a 30-year climate scenario...
June 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28633105/effects-of-triacontanol-on-ascorbate-glutathione-cycle-in-brassica-napus-l-exposed-to-cadmium-induced-oxidative-stress
#15
Elham Asadi Karam, Viviana Maresca, Sergio Sorbo, Batool Keramat, Adriana Basile
The ability of exogenous triacontanol (TRIA), a plant growth regulator, to reduce Cd toxicity was studied in canola (Brassica napus L.) plants. The following biological parameters were examined in canola seedlings to investigate TRIA-induced tolerance to Cd toxicity: seedling growth, chlorophyll damage and antioxidant response. In particular, TRIA application reduced Cd-induced oxidative damage, as shown by reduction of ROS content, lipoxygenase (LOX) activity and lipid peroxidation level. TRIA pretreatment increased non-enzymatic antioxidant contents (ascorbate, AsA, glutathione and GSH), phytochelatin content (PCs) and activities of antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), ascorbate peroxidase (APX), guaiacol peroxidase (GPX), monodehydroascorbate reductase (MDHAR), dehydro ascorbate reductase (DHAR), and glutathione reductase (GR), so reducing the oxidative stress...
June 17, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28633087/in-field-study-on-traditional-italian-tomato-landraces-the-constitutive-activation-of-the-ros-scavenging-machinery-reduces-effects-of-drought-stress
#16
Simone Landi, Alessia De Lillo, Roberta Nurcato, Stefania Grillo, Sergio Esposito
The involvement and the efficiency of the antioxidants scavenging system upon drought were examined by comparing traditional tomato landraces with respect to an industrial commercial genotype (Red Setter); for the first time, comprehensive analyses of physiological, biochemical and molecular parameters were investigated directly under real field conditions, in a typical agricultural environment of Southern Italy. The characterization of the responses upon drought evidenced peculiar changes in stomatal conductance, ascorbate peroxidase and catalase activities and expression in drought tolerant tomato landraces, with respect to the industrial genotype...
June 13, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28633086/beneficial-effects-of-melatonin-in-overcoming-drought-stress-in-wheat-seedlings
#17
Guibin Cui, Xiaoxiao Zhao, Shudong Liu, Fengli Sun, Chao Zhang, Yajun Xi
Melatonin plays an important role in abiotic stress in plant, but its role in wheat drought tolerance is less known. To verify its role, wheat seedlings (Triticum aestivum L. 'Yan 995') at 60% and 40% of field capacity were treated with 500 μM melatonin in this study. Melatonin treatment significantly enhanced the drought tolerance of wheat seedlings, as demonstrated by decreased membrane damage, more intact grana lamella of chloroplast, higher photosynthetic rate, and maximum efficiency of photosystem II, as well as higher cell turgor and water holding capacity in melatonin-treated seedlings...
June 15, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28633051/influence-of-lactic-acid-and-post-treatment-recovery-time-on-the-heat-resistance-of-listeria-monocytogenes
#18
Yasuo Omori, Kiyotaka Miake, Hiromi Nakamura, Eriko Kage-Nakadai, Yoshikazu Nishikawa
The aim of this study was to evaluate the effect of lactic acid (LA) with and without organic material at various post-treatment recovery times on the heat resistance of Listeria monocytogenes (Lm). LA decreased Lm numbers; however, the effect was remarkably attenuated by the presence of organic matter. Five strains of Lm were treated with LA and the listericidal effects were compared. The effect of LA varied depending on the strain, with ≥3.0% (w/w) LA required to kill the Lm strains in a short time. The heat resistance of Lm treated with LA was examined with respect to the time interval between the acid treatment and the subsequent manufacturing step...
June 12, 2017: International Journal of Food Microbiology
https://www.readbyqxmd.com/read/28633000/nutrition-support-for-critically-ill-patients-with-cancer
#19
Kristen Lach, Sarah J Peterson
Oncology patients often experience the classic signs of malnutrition-weight loss as well as fat and muscle wasting, which have been associated with poor tolerance to treatment and increased morbidity and mortality. Nutrition status may be an important factor in determining tolerance to treatment and outcomes associated with it. Thus, identification of those with preexisting malnutrition or who are at risk for developing malnutrition is crucial not only at time of cancer diagnosis but also throughout the treatment course so that nutrition interventions may be implemented to prevent development or worsening of malnutrition in this high-risk population...
June 1, 2017: Nutrition in Clinical Practice
https://www.readbyqxmd.com/read/28631879/context-dependent-effects-of-cold-stress-on-behavioral-physiological-and-life-history-traits-of-the-red-flour-beetle
#20
Inon Scharf, Keren-Or Wertheimer, Joy Lim Xin, Tomer Gilad, Inna Goldenberg, Aziz Subach
Animals are exposed in nature to a variety of stressors. While stress is generally harmful, mild stress can also be beneficial and contribute to reproduction and survival. We studied the effect of five cold shock events vs. a single cold shock and a control group, representing three levels of stress (harsh, mild, and no stress), on behavioral, physiological, and life-history traits of the red flour beetle (Tribolium castaneum, Herbst 1797). Beetles exposed to harsh cold stress were less active than a control group: they moved less and failed more frequently to detect a food patch...
June 20, 2017: Insect Science
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