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https://www.readbyqxmd.com/read/28335375/assessing-the-spectral-properties-of-sunlit-and-shaded-components-in-rice-canopies-with-near-ground-imaging-spectroscopy-data
#1
Kai Zhou, Xinqiang Deng, Xia Yao, Yongchao Tian, Weixing Cao, Yan Zhu, Susan L Ustin, Tao Cheng
Monitoring the components of crop canopies with remote sensing can help us understand the within-canopy variation in spectral properties and resolve the sources of uncertainties in the spectroscopic estimation of crop foliar chemistry. To date, the spectral properties of leaves and panicles in crop canopies and the shadow effects on their spectral variation remain poorly understood due to the insufficient spatial resolution of traditional spectroscopy data. To address this issue, we used a near-ground imaging spectroscopy system with high spatial and spectral resolutions to examine the spectral properties of rice leaves and panicles in sunlit and shaded portions of canopies and evaluate the effect of shadows on the relationships between spectral indices of leaves and foliar chlorophyll content...
March 13, 2017: Sensors
https://www.readbyqxmd.com/read/28335096/estimation-of-methane-emissions-from-local-and-crossbreed-beef-cattle-in-dak-lak-province-of-vietnam
#2
Carlos Alberto Ramírez-Restrepo, Dung Van Tien, Ngoan Le Duc, Mario Herrero, Phung Le Dinh, Dung Dinh Van, Sen Le Thi Hoa, Cuong Vu Chi, Cesar Solano-Patiño, Amy M Lerner, Timothy D Searchinger
Objective: This study was aimed at evaluating effects of cattle breed resources and alternative mixed-feeding practices on meat productivity and emission intensities from household farming systems in Daklak Province, Vietnam. Methods: Records from Local Yellow x Red Sindhi (Bos indicus; Lai Sind) and ½ Limousin, ½ Drought Master and ½ Red Angus cattle during the growth (0 to 21 months) and fattening (22 to 25 months) periods were used to better understand variations on meat productivity and enteric methane emissions...
March 21, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28334730/examining-the-common-aetiology-of-serous-ovarian-cancers-and-basal-like-breast-cancers-using-double-primaries
#3
Colin B Begg, Megan S Rice, Emily C Zabor, Shelley S Tworoger
BACKGROUND: The somatic molecular profiles of basal-like breast cancers and high-grade serous ovarian cancers share many similarities, leading to the hypothesis that they have similar aetiologies, in which case they should occur together in the same patient more often than expected. METHODS: We identified 545 women with double independent primary cancers of the breast and ovary reported to the California Cancer Registry from 1999 to 2013 and examined the coincidence of subtype combinations...
March 23, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28334673/presence-of-the-%C3%AE-triketone-herbicide-tefuryltrione-in-drinking-water-sources-and-its-degradation-product-in-drinking-waters
#4
Motoyuki Kamata, Mari Asami, Yoshihiko Matsui
Triketone herbicides are becoming popular because of their herbicidal activity against sulfonylurea-resistant weeds. Among these herbicides, tefuryltrione (TFT) is the first registered herbicide for rice farming, and recently its distribution has grown dramatically. In this study, we developed analytical methods for TFT and its degradation product 2-chloro-4-methylsulfonyl-3-[(tetrahydrofuran-2-yl-methoxy) methyl] benzoic acid (CMTBA). TFT was found frequently in surface waters in rice production areas at concentrations as high as 1...
March 20, 2017: Chemosphere
https://www.readbyqxmd.com/read/28334647/arsenic-load-in-rice-ecosystem-and-its-mitigation-through-deficit-irrigation
#5
Arkabanee Mukherjee, M Kundu, B Basu, B Sinha, M Chatterjee, M Das Bairagya, U K Singh, S Sarkar
Rice the staple food is a notable intake source of arsenic to the rural population of eastern India through food-chain. A field survey was carried out to study the variation of arsenic load in different parts of rice genotype Shatabdi (most popular genotype of the region) exposed to varying level of arsenic present in the irrigation water and soil. As irrigation is the primary source of arsenic contamination, a study was conducted to assess arsenic load in rice ecosystem under deficit irrigation practices like intermittent ponding (IP), saturation (SAT) and aerobic (AER) imposed during stress allowable stage (16-40 days after transplanting) of the crop (genotype Shatabdi)...
March 20, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28334380/the-influence-of-sogatella-furcifera-hemiptera-delphacidae-migratory-events-on-the-southern-rice-black-streaked-dwarf-virus-epidemics
#6
Yan Wu, Guo Zhang, Xiao Chen, Xi-Jie Li, Kai Xiong, Shu-Pei Cao, Yan-Yue Hu, Ming-Hong Lu, Wan-Cai Liu, Hoang-Anh Tuan, Guo-Jun Qi, Bao-Ping Zhai
Southern rice black-streaked dwarf virus (SRBSDV) caused serious rice losses. After the first outbreak in 2009 in northern Vietnam and southern China, the virus ravaged crops again on enormous scales in 2010, but infections have decreased sharply since 2011. We presumed that the sudden epidemics and fadeout of SRBSDV would be closely related to the migratory events of the insect vector, Sogatella furcifera. This study sought the source area of SRBSDV using the trajectory analysis method, and revealed the relationship between SRBSDV dynamics and migration of S...
March 2, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334362/development-of-an-attract-and-kill-strategy-for-drosophila-suzukii-diptera-drosophilidae-evaluation-of-attracticidal-spheres-under-laboratory-and-field-conditions
#7
Kevin B Rice, Brent D Short, Tracy C Leskey
Drosophila suzukii Matsumura (Diptera: Drosophilidae) is an invasive, polyphagous fruit fly that attacks soft-skinned fruits. Originally from Asia, D. suzukii has successfully invaded the United States and the European and South American countries. At present, calendar-based insecticide applications are used to combat D. suzukii. Here, we evaluate a behaviorally based attract-and-kill management technique using attracticidal spheres to reduce D. suzukii infestations in raspberries. In laboratory bioassays aimed at identifying effective toxicants, attracticidal spheres containing dinotefuran at 1...
March 7, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334296/impact-of-thiamethoxam-seed-treatment-on-growth-and-yield-of-rice-oryza-sativa
#8
S K Lanka, S Senthil-Nathan, D J Blouin, M J Stout
Neonicotinoid seed treatments are widely used in agriculture. In rice, Oryza sativa L., in the southern United States, neonicotinoid seed treatments are used to manage early-season populations of the rice water weevil, Lissorhoptrus oryzophilus Kuschel. In addition to their effects on pests, neonicotinoid seed treatments may benefit crop plants directly by increasing plant growth or altering plant responses to stresses. As part of an effort to assess the overall benefits of thiamethoxam seed treatment in rice, rice emergence, growth, and yield were evaluated...
March 7, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334259/population-distribution-and-range-expansion-of-the-invasive-mexican-rice-borer-lepidoptera-crambidae-in-louisiana
#9
Blake E Wilson, Julien M Beuzelin, Thomas E Reagan
The Mexican rice borer, Eoreuma loftini (Dyar) (Lepidoptera: Crambidae), is an invasive pest that was first introduced into southern Texas in 1980 and has been expanding its range eastward along the United States Gulf Coast. The pest attacks rice (Oryza sativa L.), sugarcane (Saccharum spp.), corn (Zea mays L.), and other graminaceous crops, and its establishment in Louisiana is expected to have severe economic impacts on crop production. Range expansion and population distribution of E. loftini were monitored with a network of 77 pheromone traps throughout southwestern Louisiana from 2013 to 2015...
March 2, 2017: Environmental Entomology
https://www.readbyqxmd.com/read/28334253/effect-of-the-insecticide-dinotefuran-on-the-ultrastructure-of-the-flight-muscle-of-female-sogatella-furcifera-hemiptera-delphacidae
#10
M G Liu, C X Jiang, M Mao, C Liu, Q Li, X G Wang, Q F Yang, H J Wang
Sogatella furcifera Horváth (Hemiptera: Delphacidae), is a major migratory pest of rice crops in Asia. The ultrastructure of the flight muscle directly affects the flight ability of insects. The ultrastructure of the flight muscle of some insects can be affected by insecticides. However, the ultrastructure of the flight muscle of S. furcifera and the effect of insecticides on the flight muscle of S. furcifera are not well understood. The present study was conducted to determine the effect of the insecticide dinotefuran on the ultrastructure of the flight muscle of S...
February 25, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334207/oviposition-preference-and-larval-performance-of-cnaphalocrocis-medinalis-lepidoptera-pyralidae-on-rice-genotypes
#11
Chung-Ta Liao, Chung-Li Chen
Cnaphalocrocis medinalis Guenée is a noxious rice pest during cultivated periods. Cnaphalocrocis medinalis moths lay eggs on leaf surfaces, and larvae longitudinally roll the leaves to hide inside the leaf buds and feed on the upper epidermis and mesophyll tissues. In this study, we evaluated the female oviposition preference and larval performance of C. medinalis on six insect-resistant and six insect-susceptible rice genotypes. Female moth choice and no-choice oviposition preferences were studied. The number of eggs laid on the leaf varies among selected rice genotypes; however, female adults prefer to lay more eggs on both some resistant and susceptible rice genotypes...
March 8, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334204/transcriptomic-and-histological-responses-of-african-rice-oryza-glaberrima-to-meloidogyne-graminicola-provide-new-insights-into-root-knot-nematode-resistance-in-monocots
#12
Anne-Sophie Petitot, Tina Kyndt, Rana Haidar, Alexis Dereeper, Myriam Collin, Janice de Almeida Engler, Godelieve Gheysen, Diana Fernandez
Background and Aims: The root-knot nematode Meloidogyne graminicola is responsible for production losses in rice ( Oryza sativa ) in Asia and Latin America. The accession TOG5681 of African rice, O. glaberrima , presents improved resistance to several biotic and abiotic factors, including nematodes. The aim of this study was to assess the cytological and molecular mechanisms underlying nematode resistance in this accession. Methods: Penetration and development in M...
February 28, 2017: Annals of Botany
https://www.readbyqxmd.com/read/28334150/monitoring-trends-in-insecticide-resistance-of-field-populations-of-sogatella-furcifera-hemiptera-delphacidae-in-guizhou-province-china-2012-2015
#13
Jian-Xue Jin, Dao-Chao Jin, Wen-Hong Li, Ying Cheng, Feng-Liang Li, Zhao-Chun Ye
Sogatella furcifera (Horváth) is a migratory insect that is one of the most important pest species on rice in many Asian countries. Control of S. furcifera (Hemiptera: Delphacidae) primarily depends on the use of chemical insecticides, and with this extensive reliance on pesticides, determining the degree of resistance of S. furcifera populations to the chemicals used for its control is essential. In this study, the resistance level to six conventional insecticides in five populations of S. furcifera from Guizhou Province was monitored yearly using the rice-stem dipping method in 2012-2015 to precisely understand current resistance levels and to estimate trends in the development of insecticide resistance in S...
February 22, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28334102/predation-by-bdellovibrio-bacteriovorus-significantly-reduces-viability-and-alters-the-microbial-community-composition-of-activated-sludge-flocs-and-granules
#14
Shugeng Feng, Chuan Hao Tan, Florentin Constancias, Gurjeet S Kohli, Yehuda Cohen, Scott A Rice
We recently isolated and characterized a predatory Bdellovibrio bacteriovorus strain from activated sludge (Ulu Pandan Water Reclamation Plant, Singapore), and this strain, B. bacteriovorus UP was able to prey upon a broad spectrum of bacterial isolates from the activated sludge when grown as planktonic cells or as biofilms. Here, we have tested the effect of Bdellovibrio predation on floccular and granular sludge to determine if the spatial organization, loosely or tightly aggregated communities, was protective from predation...
February 21, 2017: FEMS Microbiology Ecology
https://www.readbyqxmd.com/read/28334050/improving-transcriptome-de-novo-assembly-by-using-a-reference-genome-of-a-related-species-translational-genomics-from-oil-palm-to-coconut
#15
Alix Armero, Luc Baudouin, Stéphanie Bocs, Dominique This
The palms are a family of tropical origin and one of the main constituents of the ecosystems of these regions around the world. The two main species of palm represent different challenges: coconut (Cocos nucifera L.) is a source of multiple goods and services in tropical communities, while oil palm (Elaeis guineensis Jacq) is the main protagonist of the oil market. In this study, we present a workflow that exploits the comparative genomics between a target species (coconut) and a reference species (oil palm) to improve the transcriptomic data, providing a proteome useful to answer functional or evolutionary questions...
2017: PloS One
https://www.readbyqxmd.com/read/28333705/inhaled-remimazolam-potentiates-inhaled-remifentanil-in-rodents
#16
Tatjana Bevans, Cassandra Deering-Rice, Chris Stockmann, Joseph Rower, Derek Sakata, Christopher Reilly
BACKGROUND: Remimazolam is an ester-based short-acting benzodiazepine currently in clinical trials for IV administration. This study explored the feasibility of delivering remimazolam alone and as an adjunct to remifentanil via inhalation in rodent models. METHODS: Mice were exposed to remimazolam via inhalation; sedation was assessed using time to movement outside a set perimeter. Rats were also exposed to remimazolam aerosol alone and in combination with inhaled remifentanil, and analgesia was quantified by using a tail flick meter...
March 22, 2017: Anesthesia and Analgesia
https://www.readbyqxmd.com/read/28332574/natural-variation-in-ctb4a-enhances-rice-adaptation-to-cold-habitats
#17
Zhanying Zhang, Jinjie Li, Yinghua Pan, Jilong Li, Lei Zhou, Hongli Shi, Yawen Zeng, Haifeng Guo, Shuming Yang, Weiwei Zheng, Jianping Yu, Xingming Sun, Gangling Li, Yanglin Ding, Liang Ma, Shiquan Shen, Luyuan Dai, Hongliang Zhang, Shuhua Yang, Yan Guo, Zichao Li
Low temperature is a major factor limiting rice productivity and geographical distribution. Improved cold tolerance and expanded cultivation to high-altitude or high-latitude regions would help meet growing rice demand. Here we explored a QTL for cold tolerance and cloned the gene, CTB4a (cold tolerance at booting stage), encoding a conserved leucine-rich repeat receptor-like kinase. We show that different CTB4a alleles confer distinct levels of cold tolerance and selection for variation in the CTB4a promoter region has occurred on the basis of environmental temperature...
March 23, 2017: Nature Communications
https://www.readbyqxmd.com/read/28332256/hierarchical-corannulene-based-materials-energy-transfer-and-solid-state-photophysics
#18
Allison M Rice, W Brett Fellows, Ekaterina A Dolgopolova, Andrew B Greytak, Aaron K Vannucci, Mark D Smith, Stavros G Karakalos, Jeanette A Krause, Stanislav M Avdoshenko, Alexey A Popov, Natalia B Shustova
We report the first example of a donor-acceptor corannulene-containing hybrid material with rapid ligand-to-ligand energy transfer (ET). Additionally, we provide the first time-resolved photoluminescence (PL) data for any corannulene-based compounds in the solid state. Comprehensive analysis of PL data in combination with theoretical calculations of donor-acceptor exciton coupling was employed to estimate ET rate and efficiency in the prepared material. The ligand-to-ligand ET rate calculated using two models is comparable with that observed in fullerene-containing materials, which are generally considered for molecular electronics development...
March 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28332086/reducing-nitrogen-losses-through-ammonia-volatilization-and-surface-runoff-to-improve-apparent-nitrogen-recovery-of-double-cropping-of-late-rice-using-controlled-release-urea
#19
Pengfei Li, Jianwei Lu, Wenfeng Hou, Yonghui Pan, Yang Wang, Muhammad Rizwan Khan, Tao Ren, Rihuan Cong, Xiaokun Li
Controlled release fertilizer can reduce nitrogen losses to the environment while increasing grain yield and improving apparent nitrogen recovery (ANR) of rice. However, few studies have evaluated the comparative efficacy of different polymer-coated urea products on nitrogen (N) losses, ANR, and N uptake of rice. A 2-year field experiment was conducted to compare the effects of three different types of polymer-coated urea fertilizer on nitrogen losses through NH3 volatilization and surface runoff to the environment, ANR, grain yield, and N uptake as compared to conventional urea of rice...
March 22, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28331894/wetland-monitoring-with-global-navigation-satellite-system-reflectometry
#20
Son V Nghiem, Cinzia Zuffada, Rashmi Shah, Clara Chew, Stephen T Lowe, Anthony J Mannucci, Estel Cardellach, G Robert Brakenridge, Gary Geller, Ake Rosenqvist
Information about wetland dynamics remains a major missing gap in characterizing, understanding, and projecting changes in atmospheric methane and terrestrial water storage. A review of current satellite methods to delineate and monitor wetland change shows some recent advances, but much improved sensing technologies are still needed for wetland mapping, not only to provide more accurate global inventories but also to examine changes spanning multiple decades. Global Navigation Satellite Systems Reflectometry (GNSS-R) signatures from aircraft over the Ebro River Delta in Spain and satellite measurements over the Mississippi River and adjacent watersheds demonstrate that inundated wetlands can be identified under different vegetation conditions including a dense rice canopy and a thick forest with tall trees, where optical sensors and monostatic radars provide limited capabilities...
January 2017: Earth Space Sci
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