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https://www.readbyqxmd.com/read/29667213/photosynthesis-is-differently-regulated-during-and-after-copper-induced-nutritional-stress-in-citrus-trees
#1
Franz W R Hippler, Veronica L Dovis, Rodrigo M Boaretto, Jose A Quaggio, Ricardo A Azevedo, Lorraine E Williams, Dirceu Mattos
Antioxidant enzymatic responses in Citrus leaves under Cu-induced stress depends on rootstock genotypes. However, there is a lack of information about how woody plants recover growth capacity after exposure to elevated Cu and whether growth is affected by the redistribution of the metal to new vegetative parts and consequently whether photosynthesis is affected. Therefore, the biomass of plants and Cu concentrations in new leaf flushes were determined in young citrus trees grafted onto contrasting rootstocks [Swingle citrumelo (SW) and Rangpur lime (RL)]...
April 17, 2018: Physiologia Plantarum
https://www.readbyqxmd.com/read/29657296/roles-of-non-coding-rna-in-sugarcane-microbe-interaction
#2
Flávia Thiebaut, Cristian A Rojas, Clícia Grativol, Edmundo P da R Calixto, Mariana R Motta, Helkin G F Ballesteros, Barbara Peixoto, Berenice N S de Lima, Lucas M Vieira, Maria Emilia Walter, Elvismary M de Armas, Júlio O P Entenza, Sergio Lifschitz, Laurent Farinelli, Adriana S Hemerly, Paulo C G Ferreira
Studies have highlighted the importance of non-coding RNA regulation in plant-microbe interaction. However, the roles of sugarcane microRNAs (miRNAs) in the regulation of disease responses have not been investigated. Firstly, we screened the sRNA transcriptome of sugarcane infected with Acidovorax avenae . Conserved and novel miRNAs were identified. Additionally, small interfering RNAs (siRNAs) were aligned to differentially expressed sequences from the sugarcane transcriptome. Interestingly, many siRNAs aligned to a transcript encoding a copper-transporter gene whose expression was induced in the presence of A...
December 20, 2017: Non-Coding RNA
https://www.readbyqxmd.com/read/29656310/emission-of-heavy-metals-from-an-urban-catchment-into-receiving-water-and-possibility-of-its-limitation-on-the-example-of-lodz-city
#3
Grazyna Sakson, Agnieszka Brzezinska, Marek Zawilski
Heavy metals are among the priority pollutants which may have toxic effects on receiving water bodies. They are detected in most of samples of stormwater runoff, but the concentrations are very variable. This paper presents results of study on the amount of heavy metals discharged from urban catchment in Lodz (Poland) in 2011-2013. The research was carried out to identify the most important sources of their emission and to assess the threats to receiving water quality and opportunities of their limitation. The city is equipped with a combined sewerage in the center with 18 combined sewer overflows and with separate system in other parts...
April 14, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29648949/induced-systemic-resistance-against-citrus-canker-disease-by-rhizospheric-bacteria
#4
Nadia Riera, Han Wang, Yong Li, Jinyun Li, Kirsten Pelz-Stelinski, Nian Wang
Citrus canker, caused by Xanthomonas citri subsp. citri (Xcc), is an important citrus disease that causes significant economic losses worldwide. All commercial citrus varieties are susceptible to citrus canker. Currently, chemical control with copper based products is the main approach to control Xcc dispersal and plant colonization. However, extensive use of copper compounds can result in copper-resistant strains and cause adverse effects on the environment. Alternatives to chemical control involve the activation of citrus immunity to control the disease...
April 12, 2018: Phytopathology
https://www.readbyqxmd.com/read/29644506/uptake-and-accumulation-of-potentially-toxic-elements-in-colonized-plant-species-around-the-world-s-largest-antimony-mine-area-china
#5
Jiumei Long, Di Tan, Sihan Deng, Ming Lei
To provide information on reclamation of multi-heavy metal polluted soils with conception of phytostabilization, a field survey on the uptake and accumulation of potentially toxic elements such as antimony (Sb), arsenic (As), lead (Pb), cadmium (Cd), copper (Cu), and zinc (Zn) in colonized plant species around the world's largest antimony mine area, China, was conducted. Samples including leaves and shoots (including roots and stems) of colonized plants as well as rhizospheric soils were collected from eight sampling zones in the studied area...
April 11, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29626640/differential-responses-to-cd-stress-induced-by-exogenous-application-of-cu-zn-or-ca-in-the-medicinal-plant-catharanthus-roseus
#6
Qi Chen, Xueyan Lu, Xiaorui Guo, Yajie Pan, Bofan Yu, Zhonghua Tang, Qingxi Guo
Cd(II) is one of the most widespread and toxic heavy metals and seriously threatens plant growth, furthermore negatively affecting human health. For survival from this metal stress, plants always fight with Cd(II) toxicity by themselves or using other external factors. The effects of second metals copper (Cu(II)), zinc (Zn(II)) and calcium (Ca(II)) on the Cd(II)-affected root morphology, Cd(II) translocation and metabolic responses in Catharanthus roseus were investigated under hydroponic conditions. We found that the Cd-stressed plants displayed the browning and rot root symptom, excess H2 O2 content, lipid peroxidation and Cd(II) accumulation in plants...
April 4, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29626327/community-response-to-a-sustainable-restoration-plan-for-a-superfund-site
#7
Virinder Sidhu, Dibyendu Sarkar, Rupali Datta, Barry Solomon
Large-scale copper (Cu) mining activities in Michigan's Upper Peninsula produced millions of metric tons of mining wastes also known as stamp sands. The stamp sands containing high concentrations of Cu were disposed of into several lakes connected to the Lake Superior. Eventually, as aquatic organisms in these lakes started to exhibit toxicity symptoms, the stamp sands were dredged and discarded on the lake shores. Consequently, these areas turned into degraded, marginal lands and were collectively classified as a Torch Lake Superfund site by the US EPA...
April 6, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29616070/the-rice-rolled-fine-striped-rfs-chd3-mi-2-chromatin-remodeling-factor-epigenetically-regulates-genes-involved-in-oxidative-stress-responses-during-leaf-development
#8
Sung-Hwan Cho, Chung-Hee Lee, Eunji Gi, Yehyun Yim, Hee-Jong Koh, Kiyoon Kang, Nam-Chon Paek
In rice ( Oryza sativa ), moderate leaf rolling increases photosynthetic competence and raises grain yield; therefore, this important agronomic trait has attracted much attention from plant biologists and breeders. However, the relevant molecular mechanism remains unclear. Here, we isolated and characterized Rolled Fine Striped ( RFS ), a key gene affecting rice leaf rolling, chloroplast development, and reactive oxygen species (ROS) scavenging. The rfs-1 gamma-ray allele and the rfs-2 T-DNA insertion allele of RFS failed to complement each other and their mutants had similar phenotypes, producing extremely incurved leaves due to defective development of vascular cells on the adaxial side...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29611120/morphological-and-functional-responses-of-a-metal-tolerant-sunflower-mutant-line-to-a-copper-contaminated-soil-series
#9
Aliaksandr Kolbas, Natallia Kolbas, Lilian Marchand, Rolf Herzig, Michel Mench
The potential use of a metal-tolerant sunflower mutant line for biomonitoring Cu phytoavailability, Cu-induced soil phytotoxicity, and Cu phytoextraction was assessed on a Cu-contaminated soil series (13-1020 mg Cu kg-1 ) obtained by fading a sandy topsoil from a wood preservation site with a similar uncontaminated soil. Morphological and functional plant responses as well as shoot, leaf, and root ionomes were measured after a 1-month pot experiment. Hypocotyl length, shoot and root dry weight (DW) yields, and leaf area gradually decreased as soil Cu exposure rose...
April 2, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29605647/heavy-metal-induced-oxidative-damage-and-root-morphology-alterations-of-maize-zea-mays-l-plants-and-stress-mitigation-by-metal-tolerant-nitrogen-fixing-azotobacter-chroococcum
#10
Asfa Rizvi, Mohd Saghir Khan
Heavy metals are one of the major abiotic stresses that adversely affect the quantity and nutritive value of maize. Microbial management involving the use of plant growth promoting rhizobacteria (PGPR) is a promising inexpensive strategy for metal clean up from polluted soils. Considering these, metal tolerant plant growth promoting nitrogen fixing rhizobacterial strain CAZ3 identified by 16SrRNA gene sequence analysis as Azotobacter chroococcum was recovered from metal polluted chilli rhizosphere. When exposed to varying levels of metals, A...
March 29, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29602123/fishing-in-troubled-waters-revealing-genomic-signatures-of-local-adaptation-in-response-to-freshwater-pollutants-in-two-macroinvertebrates
#11
Hannah Weigand, Martina Weiss, Huimin Cai, Yongping Li, Lili Yu, Christine Zhang, Florian Leese
Local adaptation is of fundamental importance for populations to cope with fast, human-mediated environmental changes. In the past, analyses of local adaptation were restricted to few model species. Nowadays, due to the increased affordability of high-throughput sequencing, local adaptation can be studied much easier by searching for patterns of positive selection using genomic data. In the present study, we analysed effects of wastewater treatment plant and ore mining effluents on stream invertebrate populations...
March 27, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29579299/overexpression-of-pemips1-confers-tolerance-to-salt-and-copper-stresses-by-scavenging-reactive-oxygen-species-in-transgenic-poplar
#12
Jing Zhang, Nan Yang, Yuanyuan Li, Shidong Zhu, Shengnan Zhang, Yadong Sun, Hong-Xia Zhang, Lei Wang, Hongyan Su
Myo-inositol is a vital compound in plants. As the key rate-limiting enzyme in myo-inositol biosynthesis, l-myo-inositol-1-phosphate synthase (MIPS) is regarded as a determinant of the myo-inositol content in plants. The up-regulation of MIPS genes can increase the myo-inositol content, thereby enhancing the plant's resistance to a variety of stresses. However, there are few reports on the roles of myo-inositol and the identification of MIPS in woody trees. In this study, a MIPS gene, named as PeMIPS1, was characterized from Populus euphratica Oliv...
March 22, 2018: Tree Physiology
https://www.readbyqxmd.com/read/29577290/aluminum-and-heavy-metal-accumulation-in-tea-leaves-an-interplay-of-environmental-and-plant-factors-and-an-assessment-of-exposure-risks-to-consumers
#13
Chuan-Yi Peng, Xiao-Hui Zhu, Ru-Yan Hou, Gao-Fei Ge, Ri-Mao Hua, Xiao-Chun Wan, Hui-Mei Cai
Environmental and plant factors (soil condition, variety, season, and maturity) and exposure risks of aluminum (Al), manganese (Mn), lead (Pb), cadmium (Cd), and copper (Cu) in tea leaves were investigated. The concentrations of these metals in tea leaves could not be predicted by their total concentrations in the soil. During any one season, there were differences in Al, Mn, and Cd levels between tea varieties. Seasonally, autumn tea and/or summer tea had far higher levels of Al, Mn, Pb, and Cd than did spring tea...
March 25, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29575564/xanthomonas-arboricola-pv-pruni-causal-agent-of-bacterial-spot-of-stone-fruits-and-almond-its-genomic-and-phenotypic-characteristics-in-the-x-arboricola-species-context
#14
Jerson Garita-Cambronero, Ana Palacio-Bielsa, Jaime Cubero
Xanthomonas arboricola pv. pruni (Xap) causes bacterial spot of stone fruits and almond, an important disease that may reduce the yield and vigor of the trees, as well as the marketability of affected fruits. Xap, is within the Xanthomonas genus which has been intensively studied due its strain specialization and the host range complexity. Here, we have summarized the recent advances in our understanding of the complexities of Xap, including the studies of molecular features that resulted after comparative phenotypic and genomic analyses, in order to obtain a clearer overview of the bacterial behavior and their infection mechanisms in the context of the X...
March 25, 2018: Molecular Plant Pathology
https://www.readbyqxmd.com/read/29571366/ecophysiological-and-metabolic-responses-to-interactive-exposure-to-nutrients-and-copper-excess-in-the-brown-macroalga-cystoseira-tamariscifolia
#15
Paula S M Celis-Plá, Murray T Brown, Alex Santillán-Sarmiento, Nathalie Korbee, Claudio A Sáez, Félix L Figueroa
Global scenarios evidence that contamination due to anthropogenic activities occur at different spatial-temporal scales, being important stressors: eutrophication, due to increased nutrient inputs; and metal pollution, mostly derived from industrial activities. In this study, we investigated ecophysiological and metabolic responses to copper and nutrient excess in the brown macroalga Cystoseira tamariscifolia. Whole plants were incubated in an indoor system under control conditions, two levels of nominal copper (0...
March 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29570927/transgenerational-plasticity-in-silene-vulgaris-in-response-to-three-types-of-stress
#16
Tobias Michael Sandner, Julia Leonore van Braak, Diethart Matthies
The environment experienced by plants can influence the phenotype of their offspring. Such transgenerational plasticity can be adaptive when it results in higher fitness of the offspring under conditions correlated with those experienced by the mother plant. However, it has rarely been tested if such anticipatory parental effects may be induced by different environments. We grew clonal replicates of Silene vulgaris under control conditions and three types of stress (nutrient deficiency, copper addition, and drought) which are known from natural populations of the species...
March 23, 2018: Plant Biology
https://www.readbyqxmd.com/read/29567447/plant-uptake-and-availability-of-antimony-lead-copper-and-zinc-in-oxic-and-reduced-shooting-range-soil
#17
Kerstin Hockmann, Susan Tandy, Björn Studer, Michael W H Evangelou, Rainer Schulin
Shooting ranges polluted by antimony (Sb), lead (Pb), copper (Cu) and zinc (Zn) are used for animal grazing, thus pose a risk of contaminants entering the food chain. Many of these sites are subject to waterlogging of poorly drained soils. Using field lysimeter experiments, we compared Sb, Pb, Cu and Zn uptake by four common pasture plant species (Lolium perenne, Trifolium repens, Plantago lanceolata and Rumex obtusifolius) growing on a calcareous shooting range soil under waterlogged and drained conditions...
March 19, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29564093/bioprospecting-of-powdered-pineapple-rind-as-an-organic-supplement-of-composted-sawdust-for-pleurotus-ostreatus-mushroom-cultivation
#18
Deborah L Narh Mensah, Peter Addo, Matilda Dzomeku, Mary Obodai
Pineapple rind is a by-product of the pineapple processing industry and contains nutrients and other compounds which must be utilized as a bioresource for socio-economic benefits while preventing the potential problems of improper agroindustrial biomass disposal methods. Pleurotus ostreatus is an edible oyster mushroom with medicinal properties and can be cultivated on various agroindustrial biomass, including sawdust containing supplements. Pineapple rind was powdered and used as a supplement of composted sawdust at 2%, 5%, 10%, 12%, 15%, and 20% (w/w) on dry weight basis...
March 2018: Food Science & Nutrition
https://www.readbyqxmd.com/read/29561775/comparison-of-tagging-technologies-for-safeguards-of-copper-canisters-for-nuclear-spent-fuel
#19
REVIEW
Chiara Clementi, François Littmann, Lorenzo Capineri
Several countries are planning to store nuclear spent fuel in long term geological repositories, preserved by copper canisters with an iron insert. This new approach involves many challenging problems and one is to satisfy safeguards requirements: the Continuity of Knowledge (CoK) of the fuel must be kept from the encapsulation plant up to the final repository. To date, no measurement system has been suggested for a unique identification and authentication. Following the list of the most important safeguards, safety and security requirements for copper canisters identification and authentication, a review of conventional tagging technologies and measurement systems for nuclear items is reported in this paper...
March 21, 2018: Sensors
https://www.readbyqxmd.com/read/29558120/foliar-exposure-of-cu-oh-2-nanopesticide-to-basil-ocimum-basilicum-variety-dependent-copper-translocation-and-biochemical-responses
#20
Wenjuan Tan, Qin Gao, Chaoyi Deng, Yi Wang, Wen-Yee Lee, Jose A Hernandez-Viezcas, Jose R Peralta-Videa, Jorge L Gardea-Torresdey
In this study, low and high anthocyanin basil (Ocimum basilicum) varieties (LAV and HAV) were sprayed with 4.8 mg Cu/per pot from Cu(OH)2 nanowires, Cu(OH)2 bulk (CuPro), or CuSO4 and cultivated for 45 days. In both varieties, significantly higher Cu was determined in leaves of CuSO4 exposed plants (691 and 672.6 mg/kg for LAV and HAV, respectively); however, only in roots of HAV, Cu was higher, compared to control (p ≤ 0.05). Nanowires increased n-decanoic, dodecanoic, octanoic, and nonanoic acids in LAV, but reduced n-decanoic, dodecanoic, octanoic, and tetradecanoic acids in HAV, compared with control...
March 20, 2018: Journal of Agricultural and Food Chemistry
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