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https://www.readbyqxmd.com/read/28424880/herbicide-toxicity-testing-with-non-target-boreal-plants-the-sensitivity-of-achillea-millefolium-l-and-chamerion-angustifolium-l-to-triclopyr-and-imazapyr
#1
Krystal M Isbister, Eric G Lamb, Katherine J Stewart
Terrestrial plant toxicity tests were conducted to determine the sensitivity of two boreal plants, yarrow (Achillea millefolium L.) and fireweed (Chamerion angustifolium L.), to the herbicides imazapyr and triclopyr. Both plants are common non-target species on northern powerline rights-of-way where the impacts of proposed herbicide applications are of concern. In the vegetative vigour test, triclopyr foliar spray caused extensive damage to A. millefolium at <50% of the maximum field application rate (inhibition concentration (IC)50 = 1443...
April 19, 2017: Environmental Management
https://www.readbyqxmd.com/read/28410975/engagement-of-nurses-in-their-profession-qualitative-study-on-engagement
#2
Rosa García-Sierra, Jordi Fernández-Castro, Fermín Martínez-Zaragoza
OBJECTIVE: To identify common issues of nurses with high engagement to enable us to develop the construct as it applies to nursing in more depth. METHOD: Based on the constructivist paradigm and with a phenomenological approach, a qualitative content analysis was conducted using an inductive approach. Participants were nurses working in direct care in different healthcare areas. The sample size was determined by data saturation and 15 participants were interviewed...
April 12, 2017: Enfermería Clínica
https://www.readbyqxmd.com/read/28409435/aldo-ketoreductase-1-akr1-improves-seed-longevity-in-tobacco-and-rice-by-detoxifying-reactive-cytotoxic-compounds-generated-during-ageing
#3
Nisarga Kodadinne Narayana, Ramu S Vemanna, Babitha Kodekallu Chandrashekar, Hanumantha Rao, Amaranatha Reddy Vennapusa, Ashwini Narasimaha, Udayakumar Makarla, Mohan Raju Basavaiah
BACKGROUND: Maintenance of seed viability is an important factor for seedling vigour and plant establishment. Lipid peroxidation mediated reactive carbonyl compounds (RCC's) and non-enzymatic modifications of proteins through Maillard and Amadori products reduce seed viability and seedling vigour. RESULTS: In this study, the relevance of RCCs on genotypic variation in rice seed viability and overexpression of an aldo-ketoreductase (AKR1) enzyme that detoxify cytotoxic compounds to improve seed viability and vigour was studied...
December 2017: Rice
https://www.readbyqxmd.com/read/28394739/exercise-but-not-metformin-improves-health-related-quality-of-life-and-mood-states-in-older-adults-with-type-2-diabetes
#4
Liliana C Baptista, Aristides M Machado-Rodrigues, Raul A Martins
The aim of this cohort study is to analyse the effect of three types of treatment: (i) exercise training with multicomponent exercise (E); (ii) pharmacologic treatment with oral hypoglycaemic drug - metformin (M); and (iii) a combined therapy - exercise and metformin (E + M) on health-related quality of life (HRQoL) and mood states in older adults with type 2 diabetes (T2D) with comorbidity in an early stage of the disease. Participants (n = 284) underwent 1 of the following 3 conditions: (i) E (n = 59) trained three times/week; (ii) M (n = 30) used 850 mg of metformin twice daily; and (iii) E + M (n = 195) combined exercise and metformin...
April 10, 2017: European Journal of Sport Science
https://www.readbyqxmd.com/read/28389086/developing-eco-friendly-biofungicide-for-the-management-of-major-seed-borne-diseases-of-rice-and-assessing-their-physical-stability-and-storage-life
#5
Ramasamy Naveenkumar, Arjunan Muthukumar, Ganesan Sangeetha, Ramanathan Mohanapriya
Three plant oils (Cymbopogon citratus, Cymbopogon martini, and Pelargonium graveolens) were developed as EC formulations and tested for their physical stabilities. EC formulations (10EC, 20EC and 30EC) of C. citratus, C. martini and P. graveolens had emulsion stability, spontaneity property, heat and cold stability. EC formulated plant oils were screened against the major seed borne fungi of rice such as Curvularia lunata, Fusarium moniliforme, Bipolaris oryzae, and Sarocladium oryzae. The level of inhibition varied among the concentrations of EC formulations...
April 4, 2017: Comptes Rendus Biologies
https://www.readbyqxmd.com/read/28385036/ethnic-inequalities-in-doctor-patient-communication-regarding-personal-care-plans-the-mediating-effects-of-positive-mental-wellbeing
#6
Kanayo F Umeh
OBJECTIVE: There is limited understanding of ethnic inequalities in doctor-patient communication regarding personal care plans (PCPs). This study investigated the mediating effects of positive mental wellbeing on differences in PCP-related doctor-patient communication amongst South Asian and Caucasian UK residents. DESIGN: Data from 10,980 respondents to the 2013 Health Survey for England was analysed using bootstrapping methods. Constructs from the WEMWBS (Warwick and Edinburgh Mental Wellbeing Scale) (Stewart-Brown, S...
April 6, 2017: Ethnicity & Health
https://www.readbyqxmd.com/read/28378460/chlorosis-caused-by-two-recessively-interacting-genes-reveals-a-role-of-rna-helicase-in-hybrid-breakdown-in-arabidopsis-thaliana
#7
Björn Plötner, Markus Nurmi, Axel Fischer, Mutsumi Watanabe, Korbinian Schneeberger, Svante Holm, Neha Vaid, Mark Aurel Schöttler, Dirk Walther, Rainer Hoefgen, Detlef Weigel, Roosa A E Laitinen
Hybrids often differ in fitness from their parents. They may be superior, translating into hybrid vigour or heterosis, but they may also be markedly inferior, because of hybrid weakness or incompatibility. The underlying genetic causes for the latter can often be traced back to genes that evolve rapidly because of sexual or host-pathogen conflicts. Hybrid weakness may manifest itself only in later generations, in a phenomenon called hybrid breakdown. We have characterized a case of hybrid breakdown among two Arabidopsis thaliana accessions, Shahdara (Sha, Tajikistan) and Lövvik-5 (Lov-5, Northern Sweden)...
April 4, 2017: Plant Journal: for Cell and Molecular Biology
https://www.readbyqxmd.com/read/28370749/evidence-for-rapid-evolutionary-change-in-an-invasive-plant-in-response-to-biological-control
#8
Michael Stastny, Risa D Sargent
We present evidence that populations of an invasive plant species that have become re-associated with a specialist herbivore in the exotic range through biological control have rapidly evolved increased anti-herbivore defences compared to populations not exposed to biocontrol. We grew half-sib families of the invasive plant Lythrum salicaria sourced from 17 populations near Ottawa, Canada, that differed in their history of exposure to a biocontrol agent, the specialist beetle Neogalerucella calmariensis. In a greenhouse experiment, we manipulated larval and adult herbivory to examine whether a population's history of biocontrol influenced plant defence and growth...
March 28, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/28331200/pedigree-based-genome-re-sequencing-reveals-genetic-variation-patterns-of-elite-backbone-varieties-during-modern-rice-improvement
#9
Xingfei Zheng, Lanzhi Li, Fan Liang, Changjun Tan, Shuzhu Tang, Sibin Yu, Ying Diao, Shuangcheng Li, Zhongli Hu
Rice breeding has achieved great productivity improvements by semi-dwarf varieties and hybrid vigour. Due to poor understanding of genetic basis of elite backbone varieties, the continuous increasing in rice yield still faces great challenges. Here, 52 elite rice varieties from three historical representative pedigrees were re-sequenced with 10.1× depth on average, and ~6.5 million single nucleotide polymorphisms (SNPs) were obtained. We identified thousands of low-diversity genomic regions and 0-diversity genes during breeding...
March 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28300078/altered-expression-of-maize-plastochron1-enhances-biomass-and-seed-yield-by-extending-cell-division-duration
#10
Xiaohuan Sun, James Cahill, Tom Van Hautegem, Kim Feys, Clinton Whipple, Ondrej Novák, Sofie Delbare, Charlot Versteele, Kirin Demuynck, Jolien De Block, Veronique Storme, Hannes Claeys, Mieke Van Lijsebettens, Griet Coussens, Karin Ljung, Alex De Vliegher, Michael Muszynski, Dirk Inzé, Hilde Nelissen
Maize is the highest yielding cereal crop grown worldwide for grain or silage. Here, we show that modulating the expression of the maize PLASTOCHRON1 (ZmPLA1) gene, encoding a cytochrome P450 (CYP78A1), results in increased organ growth, seedling vigour, stover biomass and seed yield. The engineered trait is robust as it improves yield in an inbred as well as in a panel of hybrids, at several locations and over multiple seasons in the field. Transcriptome studies, hormone measurements and the expression of the auxin responsive DR5rev:mRFPer marker suggest that PLA1 may function through an increase in auxin...
March 16, 2017: Nature Communications
https://www.readbyqxmd.com/read/28296943/new-approaches-to-determine-fatigue-in-elite-athletes-during-intensified-training-resting-metabolic-rate-and-pacing-profile
#11
Amy L Woods, Laura A Garvican-Lewis, Bronwen Lundy, Anthony J Rice, Kevin G Thompson
BACKGROUND: Elite rowers complete a high volume of training across a number of modalities to prepare for competition, including periods of intensified load, which may lead to fatigue and short-term performance decrements. As yet, the influence of substantial fatigue on resting metabolic rate (RMR) and exercise regulation (pacing), and their subsequent utility as monitoring parameters, has not been explicitly investigated in elite endurance athletes. METHOD: Ten National-level rowers completed a four-week period of intensified training...
2017: PloS One
https://www.readbyqxmd.com/read/28281176/are-ethnic-disparities-in-hba1c-levels-explained-by-mental-wellbeing-analysis-of-population-based-data-from-the-health-survey-for-england
#12
Kanayo Umeh
AIMS: It is unclear how ethnic differences in HbA1c levels are affected by individual variations in mental wellbeing. Thus, the aim of this study was to assess the extent to which HbA1c disparities between Caucasian and South Asian adults are mediated by various aspects of positive psychological functioning. METHODS: Data from the 2014 Health Survey for England was analysed using bootstrapping methods. A total of 3894 UK residents with HbA1c data were eligible to participate...
March 9, 2017: Journal of Racial and Ethnic Health Disparities
https://www.readbyqxmd.com/read/28277969/involvement-of-nitric-oxide-in-enhanced-germination-and-seedling-growth-of-magnetoprimed-maize-seeds
#13
Pinke Patel, Guruprasad Kadur Narayanaswamy, Sunita Kataria, Lokesh Baghel
Nitric oxide (NO) is a highly reactive gaseous free radical, which in plants was found to stimulate seed germination and ending of dormancy. Experiments were conducted to study the effect of NO inhibitors sodium tungstate (ST) and Nω-nitro-L-arginine methyl ester hydrochloride (L-NAME), NADPH oxidase inhibitor diphenyleneiodonium (DPI) and NO donor sodium nitroprusside (SNP) on untreated and magnetoprimed maize (Zea mays var: GSF-2) seeds. Treatment of maize seeds with these inhibitors inhibited germination related parameters like seedling length, fresh weight, dry weight and vigour indices and α-amylase activity of maize seeds under laboratory conditions, whereas NO donor (SNP) promoted all these parameters...
February 21, 2017: Plant Signaling & Behavior
https://www.readbyqxmd.com/read/28276736/zooming-into-daily-life-within-person-associations-between-physical-activity-and-affect-in-young-adults
#14
Petra Haas, Johanna Schmid, Gertraud Stadler, Merle Reuter, Caterina Gawrilow
OBJECTIVE: Negative affect in daily life is linked to poorer mental and physical health. Activity could serve as an effective, low-cost intervention to improve affect. However, few prior studies have assessed physical activity and affect in everyday life, limiting the ecological validity of prior findings. This study investigates whether daily activity is associated with negative and positive evening affect in young adults. DESIGN: Young adults (N = 189, Mdn = 23...
March 1, 2017: Psychology & Health
https://www.readbyqxmd.com/read/28274301/extender-supplementation-with-catalase-maintains-the-integrity-of-sperm-plasma-membrane-after-freezing-thawing-of-semen-from-capuchin-monkey
#15
Danuza L Leão, Adriel B Brito, Stefânia A Miranda, Karol G Oliveira, Débora V C Almeida, Regiane R Santos, Sheyla F S Domingues
We aimed to evaluate the effect of supplementation of ACP-118® extender with the antioxidant catalase (10 and 50 µg/ml) on Sapajus apella sperm motility, vigour, and plasma membrane integrity during the processes of seminal liquefaction, cooling, and freezing. Catalase did not affect any of the evaluated parameters after semen dilution or cooling. Cryopreserved sperm in the presence of 50 µg/ml catalase presented a plasma membrane integrity similar to that fresh sperm, however.
March 9, 2017: Zygote: the Biology of Gametes and Early Embryos
https://www.readbyqxmd.com/read/28257492/naturally-occurring-hybrids-of-coral-reef-butterflyfishes-have-similar-fitness-compared-to-parental-species
#16
Stefano R Montanari, Jean-Paul A Hobbs, Morgan S Pratchett, Line K Bay, Lynne van Herwerden
Hybridisation can produce evolutionary novelty by increasing fitness and adaptive capacity. Heterosis, or hybrid vigour, has been documented in many plant and animal taxa, and is a notable consequence of hybridisation that has been exploited for decades in agriculture and aquaculture. On the contrary, loss of fitness in naturally occurring hybrid taxa has been observed in many cases. This can have negative consequences for the parental species involved (wasted reproductive effort), and has raised concerns for species conservation...
2017: PloS One
https://www.readbyqxmd.com/read/28246404/vigour-in-active-avoidance
#17
Camilla L Nord, Gita Prabhu, Tobias Nolte, Peter Fonagy, Ray Dolan, Michael Moutoussis
It would be maladaptive to learn about catastrophes by trial and error alone. Investment in planning and effort are necessary. Devoting too many resources to averting disaster, however, can impair quality of life, as in anxiety and paranoia. Here, we developed a novel task to explore how people adjust effort expenditure (vigor) so as to avoid negative consequences. Our novel paradigm is immersive, enabling us to measure vigor in the context of (simulated) disaster. We found that participants (N = 118) exerted effort to avoid disaster-associated states, adjusting their effort expenditure according to the baseline probability of catastrophe, in agreement with theoretical predictions...
December 2017: Scientific Reports
https://www.readbyqxmd.com/read/28220637/effect-of-selenium-supplementation-on-semen-characteristics-of-brazil-s-ram
#18
M Piagentini, D C Silva, Cpf Dell'Aqua, C F Moya-Araujo, V M Codognoto, A A Ramos, E Oba
The aim of this study was to investigate the effects of different concentrations of oral supplementation with selenium (Se) upon ram sperm parameters. Thirty rams managed in stall under intensive system were used and divided into five groups (six animals per group) as follows: control group (G1) mineral mixture supplementation without Se, group 2 (G2) mineral mixture supplemented with 5 mg/kg Se, group 3 (G3) supplemented with 10 mg/kg Se, group 4 (G4) supplemented with 15 mg/kg Se and group 5 (G5) supplemented with 20 mg/kg Se...
February 20, 2017: Reproduction in Domestic Animals, Zuchthygiene
https://www.readbyqxmd.com/read/28173754/genome-wide-analyses-of-four-major-histone-modifications-in-arabidopsis-hybrids-at-the-germinating-seed-stage
#19
Anyu Zhu, Ian K Greaves, Elizabeth S Dennis, W James Peacock
BACKGROUND: Hybrid vigour (heterosis) has been used for decades in cropping agriculture, especially in the production of maize and rice, because hybrid varieties exceed their parents in plant biomass and seed yield. The molecular basis of hybrid vigour is not fully understood. Previous studies have suggested that epigenetic systems could play a role in heterosis. RESULTS: In this project, we investigated genome-wide patterns of four histone modifications in Arabidopsis hybrids in germinating seeds...
February 7, 2017: BMC Genomics
https://www.readbyqxmd.com/read/28168103/in-situ-morphometric-survey-elucidates-the-evolutionary-systematics-of-the-eurasian-himantoglossum-clade-orchidaceae-orchidinae
#20
Richard M Bateman, Attila Molnár V, Gábor Sramkó
BACKGROUND AND AIMS: The charismatic Himantoglossum s.l. clade of Eurasian orchids contains an unusually large proportion of taxa that are of controversial circumscriptions and considerable conservation concern. Whereas our previously published study addressed the molecular phylogenetics and phylogeography of every named taxon within the clade, here we use detailed morphometric data obtained from the same populations to compare genotypes with associated phenotypes, in order to better explore taxonomic circumscription and character evolution within the clade...
2017: PeerJ
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