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https://www.readbyqxmd.com/read/28631167/copper-and-ectopic-expression-of-the-arabidopsis-transport-protein-copt1-alter-iron-homeostasis-in-rice-oryza-sativa-l
#1
Amparo Andrés-Bordería, Fernando Andrés, Antoni Garcia-Molina, Ana Perea-García, Concha Domingo, Sergi Puig, Lola Peñarrubia
Copper deficiency and excess differentially affect iron homeostasis in rice and overexpression of the Arabidopsis high-affinity copper transporter COPT1 slightly increases endogenous iron concentration in rice grains. Higher plants have developed sophisticated mechanisms to efficiently acquire and use micronutrients such as copper and iron. However, the molecular mechanisms underlying the interaction between both metals remain poorly understood. In the present work, we study the effects produced on iron homeostasis by a wide range of copper concentrations in the growth media and by altered copper transport in Oryza sativa plants...
June 19, 2017: Plant Molecular Biology
https://www.readbyqxmd.com/read/28630643/improved-classification-accuracy-of-powdery-mildew-infection-levels-of-wine-grapes-by-spatial-spectral-analysis-of-hyperspectral-images
#2
Uwe Knauer, Andrea Matros, Tijana Petrovic, Timothy Zanker, Eileen S Scott, Udo Seiffert
BACKGROUND: Hyperspectral imaging is an emerging means of assessing plant vitality, stress parameters, nutrition status, and diseases. Extraction of target values from the high-dimensional datasets either relies on pixel-wise processing of the full spectral information, appropriate selection of individual bands, or calculation of spectral indices. Limitations of such approaches are reduced classification accuracy, reduced robustness due to spatial variation of the spectral information across the surface of the objects measured as well as a loss of information intrinsic to band selection and use of spectral indices...
2017: Plant Methods
https://www.readbyqxmd.com/read/28624638/the-fate-of-spirotetramat-and-dissipation-metabolites-in-apiaceae-and-brassicaceae-leaf-root-and-soil-system-under-greenhouse-conditions-estimated-by-modified-quechers-lc-ms-ms
#3
Bożena Łozowicka, Patrycja Mojsak, Piotr Kaczyński, Rafał Konecki, Andrzej Borusiewicz
The aim of this study was to investigate the dissipation of spirotetramat and its four metabolites (B-enol, B-keto, B-mono and B-glu) in different parts of vegetables belong to the minor crops (Appiacea and Brassicaceae) and soil from cultivation. The challenge of this study was to apply an optimized clean up step in QuEChERS to obtain one universal sorbent for different complex matrices like leaves with high levels of pigments, roots containing acids, sugars, polyphenolls and pigments and soil with organic ingredients...
June 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28620402/the-xantha-marker-trait-is-associated-with-altered-tetrapyrrole-biosynthesis-and-deregulated-transcription-of-phangs-in-rice
#4
Rui-Qing Li, Meng Jiang, Yan-Hua Liu, Yun-Chao Zheng, Jian-Zhong Huang, Jian-Min Wu, Qing-Yao Shu
The xantha marker trait, which is controlled by a down-regulating epi-mutation of OsGUN4, has been applied to the production of hybrid rice. However, the molecular basis for the ability of xantha mutants to attain high photosynthetic capacity even with decreased chlorophyll contents has not been characterized. In the present study, we observed that the total chlorophyll content of the xantha mutant was only 27.2% of that of the wild-type (WT) plants. However, the xantha mutant still accumulated 59.9% of the WT δ-aminolevulinic acid content, 72...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28608039/antifungal-genes-expressed-in-transgenic-pea-pisum-sativum-l-do-not-affect-root-colonization-of-arbuscular-mycorrhizae-fungi
#5
Jagroop Gill Kahlon, Hans-Jörg Jacobsen, James F Cahill, Linda M Hall
Genetically modified crops have raised concerns about unintended consequences on non-target organisms including beneficial soil associates. Pea transformed with four antifungal genes 1-3 β glucanase, endochitinase, polygalacturonase-inhibiting proteins, and stilbene synthase is currently under field-testing for efficacy against fungal diseases in Canada. Transgenes had lower expression in the roots than leaves in greenhouse experiment. To determine the impact of disease-tolerant pea or gene products on colonization by non-target arbuscular mycorrhizae and nodulation by rhizobium, a field trial was established...
June 12, 2017: Mycorrhiza
https://www.readbyqxmd.com/read/28605840/an-assessment-of-yield-gains-under-climate-change-due-to-genetic-modification-of-pearl-millet
#6
Piara Singh, K J Boote, M D M Kadiyala, S Nedumaran, S K Gupta, K Srinivas, M C S Bantilan
Developing cultivars with traits that can enhance and sustain productivity under climate change will be an important climate smart adaptation option. The modified CSM-CERES-Pearl millet model was used to assess yield gains by modifying plant traits determining crop maturity duration, potential yield and tolerance to drought and heat in pearl millet cultivars grown at six locations in arid (Hisar, Jodhpur, Bikaner) and semi-arid (Jaipur, Aurangabad and Bijapur) tropical India and two locations in semi-arid tropical West Africa (Sadore in Niamey and Cinzana in Mali)...
June 6, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28605547/biological-traits-of-cadra-cautella-lepidoptera-pyralidae-reared-on-khodari-date-fruits-under-different-temperature-regimes
#7
Mureed Husain, Waleed S Alwaneen, Khalid Mehmood, Khawaja Ghulam Rasool, Muhammad Tufail, Abdulrahman Saad Aldawood
The almond moth, Cadra cautella (Walker) (Lepidoptera: Pyralidae), is a serious worldwide pest of dates and other crops, both in the field and in storage. Infestation by this pest significantly limits the sale and export of dates. Modified atmospheres, the temperature manipulations, are the best eco-friendly alternatives in stored product protection. We examined temperature regulation as an ecologically friendly method of pest management in stored food commodities, in particular, its effects on characteristics of C...
June 9, 2017: Journal of Economic Entomology
https://www.readbyqxmd.com/read/28600539/genetic-determinants-of-crop-timing-and-quality-traits-in-two-interspecific-petunia-recombinant-inbred-line-populations
#8
Yufang Guo, Wei-Kuang Lin, QiuXia Chen, Veronica A Vallejo, Ryan M Warner
The rate at which plants develop new nodes (development rate) is a major determinant of crop production time, yet the genetic control of this process, including genetic interactions with crop quality parameters, is poorly understood. We employed a modified genotyping-by-sequencing approach and generated genetic linkage maps with 6,291 and 3,297 single nucleotide polymorphisms (SNPs) for the interspecific Petunia recombinant inbred line (RIL) population - P. axillaris × P. exserta (AE) and P. integrifolia × P...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28598411/ruthenium-ii-catalysed-remote-c-h-alkylations-as-a-versatile-platform-to-meta-decorated-arenes
#9
Jie Li, Korkit Korvorapun, Suman De Sarkar, Torben Rogge, David J Burns, Svenja Warratz, Lutz Ackermann
The full control of positional selectivity is of prime importance in C-H activation technology. Chelation assistance served as the stimulus for the development of a plethora of ortho-selective arene functionalizations. In sharp contrast, meta-selective C-H functionalizations continue to be scarce, with all ruthenium-catalysed transformations currently requiring difficult to remove or modify nitrogen-containing heterocycles. Herein, we describe a unifying concept to access a wealth of meta-decorated arenes by a unique arene ligand effect in proximity-induced ruthenium(II) C-H activation catalysis...
June 9, 2017: Nature Communications
https://www.readbyqxmd.com/read/28597421/nitrogen-deficiency-impacts-on-leaf-cell-and-tissue-structure-with-consequences-for-senescence-associated-processes-in-brassica-napus
#10
Clément Sorin, Laurent Leport, Mireille Cambert, Alain Bouchereau, François Mariette, Maja Musse
Improvement of nutrient use efficiency is a major goal for several crop plants, especially Brassica napus. Indeed, the low nitrogen use efficiency (NUE) in this crop results in negative economic and ecological consequences. The low NUE of oilseed rape is mainly due to low remobilization of nitrogen from vegetative parts to growing organs. Remobilization of leaf nitrogen takes place during senescence, a process known to strongly modify cell and tissue structure. This study focused on the impact of moderate N depletion, expected to induce 30 % reduction of seed yield, on these structural modifications...
December 2016: Botanical Studies (Taipei, Taiwan)
https://www.readbyqxmd.com/read/28596570/an-alcaligenes-strain-emulates-bacillus-thuringiensis-producing-a-binary-protein-that-kills-corn-rootworm-through-a-mechanism-similar-to-cry34ab1-cry35ab1
#11
Nasser Yalpani, Dan Altier, Jennifer Barry, Adane Kassa, Timothy M Nowatzki, Amit Sethi, Jian-Zhou Zhao, Scott Diehn, Virginia Crane, Gary Sandahl, Rongjin Guan, Brad Poland, Claudia Perez Ortega, Mark E Nelson, Weiping Xie, Lu Liu, Gusui Wu
Crops expressing Bacillus thuringiensis (Bt)-derived insecticidal protein genes have been commercially available for over 15 years and are providing significant value to growers. However, there remains the need for alternative insecticidal actives due to emerging insect resistance to certain Bt proteins. A screen of bacterial strains led to the discovery of a two-component insecticidal protein named AfIP-1A/1B from an Alcaligenes faecalis strain. This protein shows selectivity against coleopteran insects including western corn rootworm (WCR)...
June 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28595096/occurrence-and-mobility-of-toxic-elements-in-coals-from-endemic-fluorosis-areas-in-the-three-gorges-region-sw-china
#12
Yan Xiong, Tangfu Xiao, Yizhang Liu, Jianming Zhu, Zengping Ning, Qingxiang Xiao
Fluorine (F) is a topic of great interest in coal-combustion related endemic fluorosis areas. However, little extent research exists regarding the environmental geochemistry of toxic elements that are enriched in coals and coal wastes in traditional endemic fluorosis areas, particularly focusing on their occurrences and mobilities during the weathering-leaching processes of coals and coal wastes in the surface environment. This paper addressed the issue of toxic elements in coals and coal wastes in the Three Gorges Region, Southwest (SW) China, where endemic fluorosis has historically prevailed, and investigated the distribution, occurrence, mobility features, and associated potential health risks...
June 5, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28594105/effects-of-cucumber-mosaic-virus-infected-chilli-plants-on-non-vector-bemisia-tabaci-hemiptera-aleyrodidae
#13
Khalid A Saad, Mohamad Roff M N, Rebecca H Hallett, Idris A B
Plant virus infections are known to alter host plant attractiveness and suitability for insect herbivores. This study was conducted to determine how Cucumber mosaic virus (CMV)-infected chilli plants affect the fitness and settling preferences of non-vector whitefly, Bemisia tabaci adults under dual-choice conditions with volatile organic compounds analyzed using solid phase micro-extraction coupled with gas chromatography-mass spectrometry (GC-MS). Results showed that the presence of CMV in chilli plants substantially affects the settling preferences of the B...
June 8, 2017: Insect Science
https://www.readbyqxmd.com/read/28593563/spatio-temporal-monitoring-of-cotton-cultivation-using-ground-based-and-airborne-multispectral-sensors-in-gis-environment
#14
Antonis Papadopoulos, Dionissios Kalivas, Sid Theocharopoulos
Multispectral sensor capability of capturing reflectance data at several spectral channels, together with the inherent reflectance responses of various soils and especially plant surfaces, has gained major interest in crop production. In present study, two multispectral sensing systems, a ground-based and an aerial-based, were applied for the multispatial and temporal monitoring of two cotton fields in central Greece. The ground-based system was Crop Circle ACS-430, while the aerial consisted of a consumer-level quadcopter (Phantom 2) and a modified Hero3+ Black digital camera...
July 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28592995/the-quest-for-epigenetic-regulation-underlying-unisexual-flower-development-in-cucumis-melo
#15
David Latrasse, Natalia Y Rodriguez-Granados, Alaguraj Veluchamy, Kiruthiga Gayathri Mariappan, Claudia Bevilacqua, Nicolas Crapart, Celine Camps, Vivien Sommard, Cécile Raynaud, Catherine Dogimont, Adnane Boualem, Moussa Benhamed, Abdelhafid Bendahmane
BACKGROUND: Melon (Cucumis melo) is an important vegetable crop from the Cucurbitaceae family and a reference model specie for sex determination, fruit ripening and vascular fluxes studies. Nevertheless, the nature and role of its epigenome in gene expression regulation and more specifically in sex determination remains largely unknown. RESULTS: We have investigated genome wide H3K27me3 and H3K9ac histone modifications and gene expression dynamics, in five melon organs...
2017: Epigenetics & Chromatin
https://www.readbyqxmd.com/read/28592557/comparative-mapping-of-seed-dormancy-loci-between-tropical-and-temperate-ecotypes-of-weedy-rice-oryza-sativa-l
#16
Lihua Zhang, Jieqiong Luo, Michael E Foley, Xing-You Gu
Genotypic variation at multiple loci for seed dormancy (SD) contributes to plant adaptation to diverse ecosystems. Weedy rice (Oryza sativa) was used as a model to address the similarity of SD genes between distinct ecotypes. A total of 12 quantitative trait loci for SD were identified in a primary and two advanced backcross populations derived from a temperate ecotype of weedy rice (34.3°N Lat.). Nine (75%) of the 12 loci were mapped to the same positions as those identified from a tropical ecotype of weedy rice (7...
June 7, 2017: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/28588596/evaluating-hyperspectral-vegetation-indices-for-leaf-area-index-estimation-of-oryza-sativa-l-at-diverse-phenological-stages
#17
Mairaj Din, Wen Zheng, Muhammad Rashid, Shanqin Wang, Zhihua Shi
Hyperspectral reflectance derived vegetation indices (VIs) are used for non-destructive leaf area index (LAI) monitoring for precise and efficient N nutrition management. This study tested the hypothesis that there is potential for using various hyperspectral VIs for estimating LAI at different growth stages of rice under varying N rates. Hyperspectral reflectance and crop canopy LAI measurements were carried out over 2 years (2015 and 2016) in Meichuan, Hubei, China. Different N fertilization, 0, 45, 82, 127, 165, 210, 247, and 292 kg ha(-1), were applied to generate various scales of VIs and LAI values...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28585529/crop-wild-relative-populations-of-beta-vulgaris-allow-direct-mapping-of-agronomically-important-genes
#18
Gina G Capistrano-Gossmann, D Ries, D Holtgräwe, A Minoche, T Kraft, S L M Frerichmann, T Rosleff Soerensen, J C Dohm, I González, M Schilhabel, M Varrelmann, H Tschoep, H Uphoff, K Schütze, D Borchardt, O Toerjek, W Mechelke, J C Lein, A W Schechert, L Frese, H Himmelbauer, B Weisshaar, F J Kopisch-Obuch
Rapid identification of agronomically important genes is of pivotal interest for crop breeding. One source of such genes are crop wild relative (CWR) populations. Here we used a CWR population of <200 wild beets (B. vulgaris ssp. maritima), sampled in their natural habitat, to identify the sugar beet (Beta vulgaris ssp. vulgaris) resistance gene Rz2 with a modified version of mapping-by-sequencing (MBS). For that, we generated a draft genome sequence of the wild beet. Our results show the importance of preserving CWR in situ and demonstrate the great potential of CWR for rapid discovery of causal genes relevant for crop improvement...
June 6, 2017: Nature Communications
https://www.readbyqxmd.com/read/28583948/lysinibacillus-fusiformis-m5-induces-increased-complexity-in-bacillus-subtilis-168-colony-biofilms-via-hypoxanthine
#19
Ramses Gallegos-Monterrosa, Stefanie Kankel, Sebastian Götze, Robert Barnett, Pierre Stallforth, Ákos T Kovács
In recent years, biofilms have become a central subject of research in the fields of microbiology, medicine, agriculture, or systems biology amongst others. The sociomicrobiology of multispecies biofilms, however, is still poorly understood. Here, we report a screening system that allowed us to identify soil bacteria, which induce architectural changes in biofilm colonies when cocultured with B. subtilis We identified the soil bacterium Lysinibacillus fusiformis M5 as inducer of wrinkle-formation in B. subtilis colonies mediated by a diffusible signaling molecule...
June 5, 2017: Journal of Bacteriology
https://www.readbyqxmd.com/read/28582707/an-ultrasensitive-label-free-electrochemiluminescent-immunosensor-for-measuring-cry1ab-level-and-genetically-modified-crops-content
#20
Hongfei Gao, Luke Wen, Yuhua Wu, Zhifeng Fu, Gang Wu
The development of genetically modified (GM) insect-resistant crops has aroused great public concern about the risks on the eco-environment resulting from a release of toxic Cry proteins (such as Cry1Ab) to the soil. Therefore, it is of crucial importance to measure the Cry proteins level and the GM crops content. Here, we have tested for the first time a method that uses novel carbon nanospheres (CNPs) label-free electrochemiluminescent (ECL) immunosensor for the ultrasensitive quantification of Cry1Ab and GM crops...
April 24, 2017: Biosensors & Bioelectronics
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