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https://www.readbyqxmd.com/read/28340457/dermal-exposure-of-applicators-to-chlorpyrifos-on-rice-farms-in-ghana
#1
Albert Atabila, Dung Tri Phung, Jonathan N Hogarh, Paul Osei-Fosu, Ross Sadler, Des Connell, Cordia Chu
Studies evaluating dermal exposure to pesticides among applicators in tropical countries have largely been conducted using the patch dosimetry and hand wiping/washing techniques. This study used the more accurate whole-body dosimetry technique to evaluate dermal exposure to chlorpyrifos among applicators on rice farms in Ghana. The exposure levels were plotted as Cumulative Probability Distribution (CPD). Total Dermal Exposure (TDE) of chlorpyrifos among the median exposed and the 5% highly exposed groups during a spray event were 24 mg and 48 mg, respectively...
March 16, 2017: Chemosphere
https://www.readbyqxmd.com/read/28340454/pea-cultivar-and-wheat-residues-affect-carbon-nitrogen-dynamics-in-pea-triticale-intercropping-a-microcosms-approach
#2
Antonella Scalise, Valentini A Pappa, Antonio Gelsomino, Robert M Rees
The underlying mechanisms by which legume cultivars contribute to nitrous oxide (N2O) generation are poorly understood. The aim of the present study was to explore the effects of two pea cultivars (Zero4 and Nitouche) intercropped with triticale, with or without wheat (Triticum aestivum) residues incorporation, on soil C and N dynamics, on bacterial community structure and their links with N2O emissions. Monocrops and bare soil (no plant) treatments were used as an additional control in order to account for the level of mineralisation between treatments...
March 21, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28340437/assessment-of-microalga-biofilms-for-simultaneous-remediation-and-biofuel-generation-in-mine-tailings-water
#3
H Palma, E Killoran, M Sheehan, F Berner, K Heimann
Microalgae crops can generate a biochemical profile of high energy density and may be used for remediation of contaminated waste waters. This manuscript presents a laboratory-scale investigation into the potential for growing endemic microalgae biofilms in phosphorus-enriched nickel refinery tailings water, with an emphasis on product potential and the remediation of heavy metals. The dominant species of the consortia was a Chlorella-like microalga. The growth was monitored over time, with a productivity (0...
March 11, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28340275/mini-tomato-genotypes-resistant-to-the-silverleaf-whitefly-and-to-two-spotted-spider-mites
#4
G M Maciel, R S Almeida, J P R da Rocha, V Andaló, G R Marquez, N C Santos, R R Finzi
The mini tomato production has expanded, becoming an amazing alternative for enterprise. Despite all commercial potential, the cultivation has the occurrence of pests as main obstacle during the crop development. Nowadays, there are no researches that aimed obtaining genotypes with high acylsugar content, capable of providing a broad-spectrum resistance to pests. This study aimed the selection of mini tomato genotypes, with high acylsugar content, and checking the resistance level to the silverleaf whitefly [Bemisia tabaci (Gennadius)] and to the two-spotted spider mites (Tetranychus urticae Koch)...
March 22, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28340263/myrciaria-dubia-an-amazonian-fruit-population-structure-and-its-implications-for-germplasm-conservation-and-genetic-improvement
#5
C F Nunes, T A Setotaw, M Pasqual, E A Chagas, E G Santos, D N Santos, C G B Lima, G M A Cançado
Myrciaria dubia (camu-camu) is an Amazon tree that produces a tart fruit with high vitamin C content. It is probably the fruit with the highest vitamin C content among all Brazilian fruit crops and it can be used to supplement daily vitamin C dose. This property has attracted the attention of consumers and, consequently, encouraged fruit farmers to produce it. In order to identify and select potential accessions for commercial exploitation and breeding programs, M. dubia has received considerable research attention...
March 22, 2017: Genetics and Molecular Research: GMR
https://www.readbyqxmd.com/read/28340002/overexpression-of-the-rice-sumo-e3-ligase-gene-ossiz1-in-cotton-enhances-drought-and-heat-tolerance-and-substantially-improves-fiber-yields-in-the-field-under-reduced-irrigation-and-rainfed-conditions
#6
Neelam Mishra, Li Sun, Xunlu Zhu, Jennifer Smith, Anurag Prakash Srivastava, Xiaojie Yang, Necla Pehlivan, Nardana Esmaeili, Hong Luo, Guoxin Shen, Don Jones, Dick Auld, John Burke, Paxton Payton, Hong Zhang
The Arabidopsis SUMO E3 ligase gene AtSIZ1 plays important roles in plant response to abiotic stresses as loss of function in AtSIZ1 leads to increased sensitivity to drought, heat and salt stresses. Overexpression of the AtSIZ1 rice homolog, OsSIZ1, leads to increased heat and drought tolerance in bentgrass, suggesting that the function of the E3 ligase SIZ1 is highly conserved in plants and it plays a critical role in abiotic stress responses. To test the possibility that the SUMO E3 ligase could be used to engineer drought- and heat-tolerant crops, the rice gene OsSIZ1 was overexpressed in cotton...
March 1, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28338945/genetic-variation-in-traits-for-nitrogen-use-efficiency-in-wheat
#7
Malcolm J Hawkesford
Crop nutrient and especially nitrogen use efficiency (NUE) is both an economically and an environmentally highly desirable trait. It has been estimated that only a third of nitrogen inputs to cereal crop worldwide are recovered in grain for consumption, resulting in a huge waste of resource with major negative impacts on the environment. Most measures of NUE in wheat and other cereals are based on field assessments of crop yields at given N inputs, performance responses to added N fertilizer, or by quantifying N fertilizer recovery rates...
March 13, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338908/metabolite-profiling-of-barley-flag-leaves-under-drought-and-combined-heat-and-drought-stress-reveals-metabolic-qtls-for-metabolites-associated-with-antioxidant-defense
#8
Sven Eduard Templer, Alexandra Ammon, David Pscheidt, Otilia Ciobotea, Christian Schuy, Christopher McCollum, Uwe Sonnewald, Anja Hanemann, Jutta Förster, Frank Ordon, Maria von Korff, Lars Matthias Voll
Barley (Hordeum vulgare L.) is among the most stress-tolerant crops; however, not much is known about the genetic and environmental control of metabolic adaptation of barley to abiotic stresses. We have subjected a genetically diverse set of 81 barley accessions, consisting of Mediterranean landrace genotypes and German elite breeding lines, to drought and combined heat and drought stress at anthesis. Our aim was to (i) investigate potential differences in morphological, physiological, and metabolic adaptation to the two stress scenarios between the Mediterranean and German barley genotypes and (ii) identify metabolic quantitative trait loci (mQTLs)...
March 10, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338855/improving-crop-performance-under-drought-cross-fertilization-of-disciplines
#9
Francois Tardieu, Rajeev K Varshney, Roberto Tuberosa
No abstract text is available yet for this article.
February 18, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338822/gene-expression-atlas-of-pigeonpea-and-its-application-to-gain-insights-into-genes-associated-with-pollen-fertility-implicated-in-seed-formation
#10
Lekha T Pazhamala, Shilp Purohit, Rachit K Saxena, Vanika Garg, L Krishnamurthy, Jerome Verdier, Rajeev K Varshney
Pigeonpea (Cajanus cajan) is an important grain legume of the semi-arid tropics, mainly used for its protein rich seeds. To link the genome sequence information with agronomic traits resulting from specific developmental processes, a Cajanus cajan gene expression atlas (CcGEA) was developed using the Asha genotype. Thirty tissues/organs representing developmental stages from germination to senescence were used to generate 590.84 million paired-end RNA-Seq data. The CcGEA revealed a compendium of 28 793 genes with differential, specific, spatio-temporal and constitutive expression during various stages of development in different tissues...
February 23, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338782/source-sink-interaction-a-century-old-concept-under-the-light-of-modern-molecular-systems-biology
#11
Tian-Gen Chang, Xin-Guang Zhu
Many approaches to engineer source strength have been proposed to enhance crop yield potential. However, a well-co-ordinated source-sink relationship is required finally to realize the promised increase in crop yield potential in the farmer's field. Source-sink interaction has been intensively studied for decades, and a vast amount of knowledge about the interaction in different crops and under different environments has been accumulated. In this review, we first introduce the basic concepts of source, sink and their interactions, then summarize current understanding of how source and sink can be manipulated through both environmental control and genetic manipulations...
February 17, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338762/redox-and-reactive-oxygen-species-network-in-acclimation-for-salinity-tolerance-in-sugar-beet
#12
M Sazzad Hossain, Abdelaleim Ismail ElSayed, Marten Moore, Karl-Josef Dietz
Fine-tuned and coordinated regulation of transport, metabolism and redox homeostasis allows plants to acclimate to osmotic and ionic stress caused by high salinity. Sugar beet is a highly salt tolerant crop plant and is therefore an interesting model to study sodium chloride (NaCl) acclimation in crops. Sugar beet plants were subjected to a final level of 300 mM NaCl for up to 14 d in hydroponics. Plants acclimated to NaCl stress by maintaining its growth rate and adjusting its cellular redox and reactive oxygen species (ROS) network...
February 18, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338755/red-blotch-disease-alters-grape-berry-development-and-metabolism-by-interfering-with-the-transcriptional-and-hormonal-regulation-of-ripening
#13
Barbara Blanco-Ulate, Helene Hopfer, Rosa Figueroa-Balderas, Zirou Ye, Rosa M Rivero, Alfonso Albacete, Francisco Pérez-Alfocea, Renata Koyama, Michael M Anderson, Rhonda J Smith, Susan E Ebeler, Dario Cantu
Grapevine red blotch-associated virus (GRBaV) is a major threat to the wine industry in the USA. GRBaV infections (aka red blotch disease) compromise crop yield and berry chemical composition, affecting the flavor and aroma properties of must and wine. In this study, we combined genome-wide transcriptional profiling with targeted metabolite analyses and biochemical assays to characterize the impact of the disease on red-skinned berry ripening and metabolism. Using naturally infected berries collected from two vineyards, we were able to identify consistent berry responses to GRBaV across different environmental and cultural conditions...
January 27, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338728/characterising-root-trait-variability-in-chickpea-cicer-arietinum-l-germplasm
#14
Yinglong Chen, Michel Edmond Ghanem, Kadambot Hm Siddique
Chickpea (Cicer arietinum L.) is an important grain legume crop but its sustainable production is challenged by predicted climate changes, which are likely to increase production limitations and uncertainty in yields. Characterising the variability in root architectural traits in a core collection of chickpea germplasm will provide the basis for breeding new germplasm with suitable root traits for the efficient acquisition of soil resources and adaptation to drought and other abiotic stresses. This study used a semi-hydroponic phenotyping system for assessing root trait variability across 270 chickpea genotypes...
October 6, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338712/molecular-mechanisms-of-flowering-under-long-days-and-stem-growth-habit-in-soybean
#15
Dong Cao, Ryoma Takeshima, Chen Zhao, Baohui Liu, Abe Jun, Fanjiang Kong
Precise timing of flowering is critical to crop adaptation and productivity in a given environment. A number of classical E genes controlling flowering time and maturity have been identified in soybean [Glycine max (L.) Merr.]. The public availability of the soybean genome sequence has accelerated the identification of orthologues of Arabidopsis flowering genes and their functional analysis, and has allowed notable progress towards understanding the molecular mechanisms of flowering in soybean. Great progress has been made particularly in identifying genes and modules that inhibit flowering in long-day conditions, because a reduced or absent inhibition of flowering by long daylengths is an essential trait for soybean, a short-day (SD) plant, to expand its adaptability toward higher latitude environments...
October 20, 2016: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28338637/using-an-active-optical-sensor-to-develop-an-optimal-ndvi-dynamic-model-for-high-yield-rice-production-yangtze-china
#16
Xiaojun Liu, Richard B Ferguson, Hengbiao Zheng, Qiang Cao, Yongchao Tian, Weixing Cao, Yan Zhu
The successful development of an optimal canopy vegetation index dynamic model for obtaining higher yield can offer a technical approach for real-time and nondestructive diagnosis of rice (Oryza sativa L) growth and nitrogen (N) nutrition status. In this study, multiple rice cultivars and N treatments of experimental plots were carried out to obtain: normalized difference vegetation index (NDVI), leaf area index (LAI), above-ground dry matter (DM), and grain yield (GY) data. The quantitative relationships between NDVI and these growth indices (e...
March 24, 2017: Sensors
https://www.readbyqxmd.com/read/28337836/plant-transcription-factors-from-the-homeodomain-leucine-zipper-family-i-role-in-development-and-stress-responses
#17
REVIEW
María Florencia Perotti, Pamela Anahí Ribone, Raquel Lía Chan
In front of stressful conditions plants display adaptation mechanisms leading to changes in their morphology, physiology, development and molecular composition. Transcription factors (TFs) play crucial roles in these complex adaptation processes. This work is focused in the homeodomain-leucine zipper I (HD-Zip I) family of TFs, unique to plants. First discovered in 1991, they were identified and isolated from monocotyledonous and dicotyledonous plants showing high structural similarity and diversified functions...
March 24, 2017: IUBMB Life
https://www.readbyqxmd.com/read/28337760/proteomics-of-contrasting-rice-genotypes-identification-of-potential-targets-for-raising-crops-for-saline-environment
#18
Nita Lakra, Charanpreet Kaur, Khalid Anwar, Sneh Lata Singla-Pareek, Ashwani Pareek
High salinity is one of the major problems in crop productivity, affecting seed germination as well as yield. In order to enhance tolerance of crops towards salinity, it is essential to understand the underlying physiological and molecular mechanisms. In this endeavor, study of contrasting genotypes of the same species differing in their response towards salinity stress can be very useful. In the present study, we have investigated temporal differences in morphological, physiological and proteome profiles of two contrasting genotypes of rice to understand the basis of salt-tolerance...
March 24, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28337621/metal-contaminated-potato-crops-and-potential-human-health-risk-in-bolivian-mining-highlands
#19
Alan E Garrido, William H J Strosnider, Robin Taylor Wilson, Janette Condori, Robert W Nairn
This study assessed metals in irrigation water, soil and potato crops impacted by mining discharges, as well as potential human health risk in the high desert near the historic mining center of Potosí, Bolivia. Metal concentrations were compared with international concentration limit guidelines. In addition, an ingested average daily dose and minimum risk level were used to determine the hazard quotient from potato consumption for adults and children. Irrigation water maximum concentrations of Cd, Pb and Zn in mining-impacted sites were elevated 20- to 1100-fold above international concentration limit guidelines...
March 23, 2017: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/28337486/rapeseed-legume-intercrops-plant-growth-and-nitrogen-balance-in-early-stages-of-growth-and-development
#20
Thaïs Génard, Philippe Etienne, Sylvain Diquélou, Jean-Claude Yvin, Cécile Revellin, Philippe Laîné
In this study we tested whether legumes can improve the growth and N and S nutrition of rapeseed in an intercropping system and compared the effect of mixtures on legume N-fixation and soil N-resources. Rapeseed was cultivated in low N conditions in monocrops using one (R) or two plants (RR) per pot and in mixtures with lupine, clover or vetch. The R monocrop was the most relevant control, intraspecific competition inducing a significant growth delay resulting in a significantly lower leaf number, in RR monocrop compared to R and the three mixtures considered...
March 2017: Heliyon
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