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https://www.readbyqxmd.com/read/29150505/cry64ba-and-cry64ca-two-etx-mtx2-bacillus-thuringiensis-insecticidal-proteins-against-hemipteran-pests
#1
Yonglei Liu, Yinglong Wang, Changlong Shu, Kejian Lin, Fuping Song, Alejandra Bravo, Mario Soberón, Jie Zhang
Genetically modified crops that express insecticidal Bacillus thuringiensis (Bt) proteins have become a primary approach for control of lepidopteran (moth) and coleopteran (beetle) pests that feed by chewing the plants. However, the sap-sucking insects (Hemiptera) are not particularly susceptible to Bt toxins. In this study, we describe two Cry toxins (Cry64Ba and Cry64Ca) from a Bt 1012 strain showed toxicity against two important rice hemipteran pests, Laodelphax striatellus and Sogatella furcifera Both of these two proteins contain an ETX/MTX2 domain, and share common sequence features with the β-pore forming toxins...
November 17, 2017: Applied and Environmental Microbiology
https://www.readbyqxmd.com/read/29150254/subcellular-distribution-and-biotransformation-of-phenanthrene-in-pakchoi-after-inoculation-with-endophytic-pseudomonas-sp-as-probed-using-hrms-coupled-with-isotope-labeling
#2
Kai Sun, Mussie Y Habteselassie, Juan Liu, Shunyao Li, Yanzheng Gao
Contamination of food-crops with polycyclic aromatic hydrocarbons (PAHs) poses a grave concern to food safety, especially when PAHs are internalized. We have demonstrated in our previous study that inoculation of crop with a phenanthrene-degrading endophytic Pseudomonas sp. Ph6-gfp could overcome this problem. Here, the subcellular distribution and biotransformation mechanism of phenanthrene in pakchoi (Brassica chinensis L.) seedlings with inoculation of Ph6-gfp were further investigated both in vitro and in vivo...
November 14, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/29147882/growth-inhibition-patterns-and-transfer-factor-profiles-in-arsenic-stressed-rice-oryza-sativa-l
#3
Ha-Il Jung, Jinwook Lee, Mi-Jin Chae, Myung-Suk Kong, Chang-Hoon Lee, Seong-Soo Kang, Yoo-Hak Kim
Arsenic (As) accumulation in rice owing to uptake from the soil is a critical human health issue. Here, we studied the chemical properties of As-treated soils, growth inhibition patterns of As-stressed rice plants, changes in the As content of soil and soil solutions, and the relationship between As accumulation and As transfer factor from the soil to the rice organs. Rice plants were cultivated in a greenhouse under four concentrations of As: 0 (control), 25, 50, and 75 mg kg(-1). A significant positive correlation was found between available P2O5 and exchangeable K and between As concentration and available P2O5 or exchangeable K...
November 16, 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29146310/a-review-on-moringa-tree-and-vetiver-grass-potential-biorefinery-feedstocks
#4
REVIEW
Jegannathan Kenthorai Raman, Catarina M Alves, Edgard Gnansounou
Plants and derivatives have been explored for unlimited purposes by mankind, from crop cultivation for providing food and animal feed, to the use for cosmetics, therapeutics and energy. Moringa tree and vetiver grass features, capabilities and applications were explored through a literature review. The suitability of these plants for the bioenergy industry products is evidenced, namely for bioethanol, biogas and biodiesel, given the lignocellulosic biomass content of these plants and characteristics of moringa seed oil...
October 31, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/29145496/insights-into-soybean-transcriptome-reconfiguration-under-hypoxic-stress-functional-regulatory-structural-and-compositional-characterization
#5
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/29145390/morphological-and-molecular-characterization-of-brazilian-populations-of-diatraea-saccharalis-fabricius-1794-lepidoptera-crambidae-and-the-evolutionary-relationship-among-species-of-diatraea-guilding
#6
Fabricio J B Francischini, Jaqueline Bueno de Campos, Alessandro Alves-Pereira, João Paulo Gomes Viana, Christopher C Grinter, Steven J Clough, Maria I Zucchi
The sugarcane borer or corn stalk borer, Diatraea Guilding is polyphagous insect pest of many important crops such as corn, sorghum and sugarcane. Losses arising from the attack of Diatraea species have been a serious problem, which may cause loss in sugarcane production around 0.25% in sugar, 0.20% in alcohol and 0.77% of body weight for every 1% infestation and up to 21% in corn production fields. In Brazil, the most commonly reported species are Diatraea saccharalis (Fabricius, 1794) and Diatraea impersonatella (Walker, 1863) (= D...
2017: PloS One
https://www.readbyqxmd.com/read/29145144/pyrethroid-pesticide-residues-in-the-global-environment-an-overview
#7
REVIEW
Wangxin Tang, Di Wang, Jiaqi Wang, Zhengwen Wu, Lingyu Li, Mingli Huang, Shaohui Xu, Dongyun Yan
Pyrethroids are synthetic organic insecticides with low mammalian toxicity that are widely used in both rural and urban areas worldwide. After entering the natural environment, pyrethroids circulate among the three phases of solid, liquid, and gas and enter organisms through food chains, resulting in substantial health risks. This review summarized the available studies on pyrethroid residues since 1986 in different media at the global scale and indicated that pyrethroids have been widely detected in a range of environments (including soils, water, sediments, and indoors) and in organisms...
October 23, 2017: Chemosphere
https://www.readbyqxmd.com/read/29145050/can-farmers-mitigate-environmental-impacts-through-combined-production-of-food-fuel-and-feed-a-consequential-life-cycle-assessment-of-integrated-mixed-crop-livestock-system-with-a-green-biorefinery
#8
Ranjan Parajuli, Tommy Dalgaard, Morten Birkved
This study evaluates environmental impacts of an integrated mixed crop-livestock system with a green biorefinery (GBR). System integration included production of feed crops and green biomasses (Sys-I) to meet the demand of a livestock system (Sys-III) and to process green biomasses in a GBR system (Sys-II). Processing of grass-clover to produce feed protein was considered in Sys-II, particularly to substitute the imported soybean meal. Waste generated from the livestock and GBR systems were considered for the conversion to biomethane (Sys-IV)...
November 13, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29144774/strategies-for-enhanced-crop-resistance-to-insect-pests
#9
Angela E Douglas
Insect pests are responsible for substantial crop losses worldwide through direct damage and transmission of plant diseases, and novel approaches that complement or replace broad-spectrum chemical insecticides will facilitate the sustainable intensification of food production in the coming decades. Multiple strategies for improved crop resistance to insect pests, especially strategies relating to plant secondary metabolism and immunity and microbiome science, are becoming available. Recent advances in metabolic engineering of plant secondary chemistry offer the promise of specific toxicity or deterrence to insect pests; improved understanding of plant immunity against insects provides routes to optimize plant defenses against insects; and the microbiomes of insect pests can be exploited, either as a target or as a vehicle for delivery of insecticidal agents...
November 16, 2017: Annual Review of Plant Biology
https://www.readbyqxmd.com/read/29144203/suppression-or-activation-of-immune-responses-by-predicted-secreted-proteins-of-the-soybean-rust-pathogen-phakopsora-pachyrhizi
#10
Mingsheng Qi, James P Grayczyk, Janina M Seitz, Youngsill Lee, Tobias I Link, Doil Choi, Kerry F Pedley, Ralf T Voegele, Thomas J Baum, Steven A Whitham
Rust fungi, such as the soybean rust pathogen Phakopsora pachyrhizi, are major threats to crop production. They form specialized haustoria that are hyphal structures intimately associated with host-plant cell membranes. These haustoria have roles in acquiring nutrients and secreting effector proteins that manipulate host immune systems. Functional characterization of effector proteins of rust fungi is important for understanding mechanisms that underlie their virulence and pathogenicity. Hundreds of candidate effector proteins have been predicted for rust pathogens, but it is not clear how to prioritize these effector candidates for further characterization...
November 16, 2017: Molecular Plant-microbe Interactions: MPMI
https://www.readbyqxmd.com/read/29144021/quantitative-extracellular-matrix-proteomics-suggests-cell-wall-reprogramming-in-host-specific-immunity-during-vascular-wilt-caused-by-fusarium-oxysporum-in-chickpea
#11
Eman Elagamey, Kanika Narula, Arunima Sinha, Sudip Ghosh, Magdi A E Abdellatef, Niranjan Chakraborty, Subhra Chakraborty
Extracellular matrix (ECM) is the unique organelle that perceives stress signals and reprograms molecular events of host cell during patho-stress. However, our understanding of how ECM dictates plant immunity is largely unknown. Vascular wilt caused by the soil borne filamentous fungus Fusarium oxysporum is a major impediment for global crop productivity. To elucidate the role of ECM proteins and molecular mechanism associated with cell wall mediated immunity, the temporal changes of ECM proteome was studied in vascular wilt resistant chickpea cultivar upon F...
November 16, 2017: Proteomics
https://www.readbyqxmd.com/read/29143671/gwas-of-agronomic-traits-in-soybean-collection-included-in-breeding-pool-in-kazakhstan
#12
Alibek Zatybekov, Saule Abugalieva, Svetlana Didorenko, Yelena Gerasimova, Ivan Sidorik, Shynar Anuarbek, Yerlan Turuspekov
BACKGROUND: In recent years soybean is becoming one of the most important oilseed crops in Kazakhstan. Only within the last ten years (2006-2016), the area under soybean is expanded from 45 thousand hectares (ha) in 2006 to 120 thousand ha in 2016. The general trend of soybean expansion is from south-eastern to eastern and northern regions of the country, where average temperatures are lower and growing seasons are shorter. These new soybean growing territories were poorly examined in terms of general effects on productivity level among the diverse sample of soybean accessions...
November 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29143598/gwas-for-plant-growth-stages-and-yield-components-in-spring-wheat-triticum-aestivum-l-harvested-in-three-regions-of-kazakhstan
#13
Yerlan Turuspekov, Aida Baibulatova, Kanat Yermekbayev, Laura Tokhetova, Vladimir Chudinov, Grigoriy Sereda, Martin Ganal, Simon Griffiths, Saule Abugalieva
BACKGROUND: Spring wheat is the largest agricultural crop grown in Kazakhstan with an annual sowing area of 12 million hectares in 2016. Annually, the country harvests around 15 million tons of high quality grain. Despite environmental stress factors it is predicted that the use of new technologies may lead to increases in productivity from current levels of 1.5 to up to 3 tons per hectare. One way of improving wheat productivity is by the application of new genomic oriented approaches in plant breeding projects...
November 14, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/29141988/genotyping-by-sequencing-in-almond-snp-discovery-linkage-mapping-and-marker-design
#14
Shashi N Goonetilleke, Timothy J March, Michelle G Wirthensohn, Pere Arús, Amanda R Walker, Diane E Mather
In crop plant genetics, linkage maps provide the basis for the mapping of loci that affect important traits and for the selection of markers to be applied in crop improvement. In outcrossing species such as almond [Prunus dulcis (Mill.) D.A. Webb], application of a double pseudo-testcross mapping approach to the F1 progeny of a bi-parental cross leads to the construction of a linkage map for each parent. Here, we report on the application of genotyping-by-sequencing to discover and map single-nucleotide polymorphisms in the almond cultivars 'Nonpareil' and 'Lauranne'...
November 15, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29140092/determinants-and-expansion-of-specificity-in-a-trichothecene-udp-glucosyltransferase-from-oryza-sativa
#15
Karl M Wetterhorn, Kaitlyn Gabardi, Herbert Michlmayr, Alexandra Malachova, Mark Busman, Susan Patricia McCormick, Franz Berthiller, Gerhard Adam, Ivan Rayment
Family 1 UDP-glycosyltransferases in plants (UGTs) primarily form glucose conjugates of small molecules and, besides other functions, play a role in detoxification of xenobiotics. Indeed, overexpression of a barley UGT in wheat has been shown to control Fusarium head blight, where this is a plant disease of global significance that leads to reduced crop yields and contamination with trichothecene mycotoxins such as deoxynivalenol (DON), T-2 toxin and many other structural variants. The UGT Os79 from rice has emerged as a promising candidate for inactivation of mycotoxins on account of its ability to glycosylate DON, nivalenol and hydrolyzed T-2 toxin (HT-2)...
November 15, 2017: Biochemistry
https://www.readbyqxmd.com/read/29139139/epiphytic-fungal-community-in-vitis-vinifera-of-the-portuguese-wine-regions
#16
M Oliveira, M Arenas, O Lage, M Cunha, M I Amorim
In the present work, fungi present in the grapevine's phyllosphere collected from the main demarcated wine regions of Portugal were identified, and their phylogenetic relationships was analyzed. A total of 46 vine samples (leaves and berries) were collected from different parts of the country, being isolated a total of 117 fungal colonies that were identified to the genus level and sequenced in the following genetic regions: internal transcribed spacer region and 18S rRNA and β-tubulin gene. Next, a phylogenetic tree reconstruction for each genetic region was built...
November 14, 2017: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29139077/spatiotemporal-patterns-and-source-attribution-of-nitrogen-pollution-in-a-typical-headwater-agricultural-watershed-in-southeastern-china
#17
Wenjun Chen, Bin He, Daniel Nover, Weili Duan, Chuan Luo, Kaiyan Zhao, Wen Chen
Excessive nitrogen (N) discharge from agriculture causes widespread problems in aquatic ecosystems. Knowledge of spatiotemporal patterns and source attribution of N pollution is critical for nutrient management programs but is poorly studied in headwaters with various small water bodies and mini-point pollution sources. Taking a typical small watershed in the low mountains of Southeastern China as an example, N pollution and source attribution were studied for a multipond system around a village using the Hydrological Simulation Program-Fortran (HSPF) model...
November 14, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29138932/soybean-glycine-max-wrinkled1-transcription-factor-gmwri1a-positively-regulates-seed-oil-accumulation
#18
Liang Chen, Yuhong Zheng, Zhimin Dong, Fanfan Meng, Xingmiao Sun, Xuhong Fan, Yunfeng Zhang, Mingliang Wang, Shuming Wang
Soybean is the world's most important leguminous crop producing high-quality protein and oil. Elevating oil accumulation in soybean seed is always many researchers' goal. WRINKLED1 (WRI1) encodes a transcription factor of the APETALA2/ethylene responsive element-binding protein (AP2/EREBP) family that plays important roles during plant seed oil accumulation. In this study, we isolated and characterized three distinct orthologues of WRI1 in soybean (Glycine max) that display different organ-specific expression patterns, among which GmWRI1a was highly expressed in maturing soybean seed...
November 14, 2017: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/29138387/strategies-for-feeding-the-world-more-sustainably-with-organic-agriculture
#19
Adrian Muller, Christian Schader, Nadia El-Hage Scialabba, Judith Brüggemann, Anne Isensee, Karl-Heinz Erb, Pete Smith, Peter Klocke, Florian Leiber, Matthias Stolze, Urs Niggli
Organic agriculture is proposed as a promising approach to achieving sustainable food systems, but its feasibility is also contested. We use a food systems model that addresses agronomic characteristics of organic agriculture to analyze the role that organic agriculture could play in sustainable food systems. Here we show that a 100% conversion to organic agriculture needs more land than conventional agriculture but reduces N-surplus and pesticide use. However, in combination with reductions of food wastage and food-competing feed from arable land, with correspondingly reduced production and consumption of animal products, land use under organic agriculture remains below the reference scenario...
November 14, 2017: Nature Communications
https://www.readbyqxmd.com/read/29137608/the-pennycress-thlaspi-arvense-l-nectary-structural-and-transcriptomic-characterization
#20
Jason B Thomas, Marshall E Hampton, Kevin M Dorn, M David Marks, Clay J Carter
BACKGROUND: Pennycress [Thlaspi arvense L (Brassicaceae)] is being domesticated as a renewable biodiesel feedstock that also provides crucial ecosystems services, including as a nutritional resource for pollinators. However, its flowers produce significantly less nectar than other crop relatives in the Brassicaceae. This study was undertaken to understand the basic biology of the pennycress nectary as an initial step toward the possibility of enhancing nectar output from its flowers. RESULTS: Pennycress flowers contain four equivalent nectaries located extrastaminally at the base of the insertion sites of short and long stamens...
November 14, 2017: BMC Plant Biology
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