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https://www.readbyqxmd.com/read/28630437/phylogenetic-analysis-of-f-bzip-transcription-factors-indicates-conservation-of-the-zinc-deficiency-response-across-land-plants
#1
Pedro Humberto Castro, Grmay H Lilay, Antonio Muñoz-Mérida, Jan K Schjoerring, Herlânder Azevedo, Ana G L Assunção
Basic leucine zipper (bZIP) transcription factors control important developmental and physiological processes in plants. In Arabidopsis thaliana, the three gene F-bZIP subfamily has been associated with zinc deficiency and salt stress response. Benefiting from the present abundance of plant genomic data, we performed an evolutionary and structural characterization of plant F-bZIPs. We observed divergence during seed plant evolution, into two groups and inferred different selective pressures for each. Group 1 contains AtbZIP19 and AtbZIP23 and appears more conserved, whereas Group 2, containing AtbZIP24, is more prone to gene loss and expansion events...
June 19, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28624948/metal-release-from-contaminated-leaf-litter-and-leachate-toxicity-for-the-freshwater-crustacean-gammarus-fossarum
#2
Florence Maunoury-Danger, Vincent Felten, Clément Bojic, Fabrice Fraysse, Mar Cosin Ponce, Odile Dedourge-Geffard, Alain Geffard, François Guérold, Michael Danger
Industrialization has left large surfaces of contaminated soils, which may act as a source of pollution for contiguous ecosystems, either terrestrial or aquatic. When polluted sites are recolonized by plants, dispersion of leaf litter might represent a non-negligible source of contaminants, especially metals. To evaluate the risks associated to contaminated leaf litter dispersion in aquatic ecosystems, we first measured the dynamics of metal loss from leaf litter during a 48-h experimental leaching. We used aspen (Populus tremula L...
June 18, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28624857/bioaccumulation-of-heavy-metals-and-ecophysiological-responses-to-heavy-metal-stress-in-selected-populations-of-vaccinium-myrtillus-l-and-vaccinium-vitis-idaea-l
#3
Marta Kandziora-Ciupa, Aleksandra Nadgórska-Socha, Gabriela Barczyk, Ryszard Ciepał
The aim of this study was to determine the concentrations of heavy metals (Cd, Pb, Zn, Fe, and Mn) in soil, and their bioavailability and bioaccumulation in Vaccinium myrtillus L. and Vaccinium vitis-idaea L. organs. Analysis also concerned the physiological responses of these plants from three polluted sites (immediate vicinity of a zinc smelter in Miasteczko Śląskie, ArcelorMittal Poland S.A. iron smelter in Dąbrowa Górnicza-Łosień, and Jaworzno III power plant in Jaworzno) and one pseudo-control site (Pazurek nature reserve in Jaroszowiec Olkuski)...
June 17, 2017: Ecotoxicology
https://www.readbyqxmd.com/read/28624629/zinc-oxide-nanoparticle-exposure-triggers-different-gene-expression-patterns-in-maize-shoots-and-roots
#4
Hongwei Xun, Xintong Ma, Jing Chen, Zhongzhou Yang, Bao Liu, Xiang Gao, Guo Li, Jiamiao Yu, Li Wang, Jinsong Pang
The potential impacts of environmentally accumulated zinc oxide nanoparticles (nZnOs) on plant growth have not been well studied. A transcriptome profile analysis of maize exposed to nZnOs showed that the genes in the shoots and roots responded differently. Although the number of differentially expressed genes (DEGs) in the roots was greater than that in the shoots, the number of up- or down-regulated genes in both the shoots and roots was similar. The enrichment of gene ontology (GO) terms was also significantly different in the shoots and roots...
June 15, 2017: Environmental Pollution
https://www.readbyqxmd.com/read/28623252/natural-variation-in-arabidopsis-thaliana-cd-responses-and-the-detection-of-quantitative-trait-loci-affecting-cd-tolerance
#5
Sina Fischer, Thomas Spielau, Stephan Clemens
Metal tolerance is often a result of metal storage or distribution. Thus, with the goal of advancing the molecular understanding of such metal homeostatic mechanisms, natural variation of metal tolerance in Arabidopsis thaliana was investigated. Substantial variation exists in tolerance of excess copper (Cu), zinc (Zn) and cadmium (Cd). Two accessions, Col-0 and Bur-0, and a recombinant inbred line (RIL) population derived from these parents were chosen for further analysis of Cd and Zn tolerance variation, which is evident at different plant ages in various experimental systems and appears to be genetically linked...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620360/cytr-homolog-of-pectobacterium-carotovorum-subsp-carotovorum-controls-air-liquid-biofilm-formation-by-regulating-multiple-genes-involved-in-cellulose-production-c-di-gmp-signaling-motility-and-type-iii-secretion-system-in-response-to-nutritional-and-environmental
#6
M M Haque, M M H Oliver, Kamrun Nahar, Mohammad Z Alam, Hisae Hirata, Shinji Tsuyumu
Pectobacterium carotovorum subsp. carotovorum [Pcc (formerly Erwinia carotovora subsp. carotovora)] PC1 causes soft-rot disease in a wide variety of plant species by secreting multiple pathogenicity-related traits. In this study, regulatory mechanism of air-liquid (AL) biofilm formation was studied using a cytR homolog gene deletion mutant (ΔcytR) of Pcc PC1. Compared to the wild type (Pcc PC1), the ΔcytR mutant produced fragile and significantly (P < 0.001) lower amounts of AL biofilm on salt-optimized broth plus 2% glycerol (SOBG), yeast peptone dextrose adenine, and also on King's B at 27°C after 72 h incubation in static condition...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28611792/structural-and-functional-insights-into-wrky3-and-wrky4-transcription-factors-to-unravel-the-wrky-dna-w-box-complex-interaction-in-tomato-solanum-lycopersicum-l-a-computational-approach
#7
Mohd Aamir, Vinay K Singh, Mukesh Meena, Ram S Upadhyay, Vijai K Gupta, Surendra Singh
The WRKY transcription factors (TFs), play crucial role in plant defense response against various abiotic and biotic stresses. The role of WRKY3 and WRKY4 genes in plant defense response against necrotrophic pathogens is well-reported. However, their functional annotation in tomato is largely unknown. In the present work, we have characterized the structural and functional attributes of the two identified tomato WRKY transcription factors, WRKY3 (SlWRKY3), and WRKY4 (SlWRKY4) using computational approaches...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28607992/no-dependent-programmed-cell-death-is-involved-in-the-formation-of-zn-related-lesions-in-tobacco-leaves
#8
Aleksandra Weremczuk, Anna Ruszczyńska, Ewa Bulska, Danuta Maria Antosiewicz
A recent study indicated that the development of lesions on the leaf blades of tobacco exposed to zinc (Zn) excess can be considered a manifestation of a Zn-tolerance strategy at the organ level. Here, we investigated whether cell death leading to the formation of localized lesions is destructive in character (necrosis type) or results from programmed self-induced cell death (PCD). Selected parameters, including PCD markers, were determined in the leaves from tobacco plants grown in the presence of 200 μM Zn and compared with control conditions...
June 13, 2017: Metallomics: Integrated Biometal Science
https://www.readbyqxmd.com/read/28596777/physiological-responses-and-yield-of-wheat-plants-in-zinc-mediated-alleviation-of-drought-stress
#9
Dongyun Ma, Dexiang Sun, Chenyang Wang, Huina Ding, Haixia Qin, Junfeng Hou, Xin Huang, Yingxin Xie, Tiancai Guo
To evaluate the physiological responses of wheat to zinc (Zn) fertilizer application under drought stress, pot, and field experiments were conducted on wheat plants grown under different soil moistures and treated with soil and foliar Zn applications. Photosynthetic characteristics, antioxidant content, Zn element concentration, and the transcription level of genes involved in antioxidant biosynthesis were analyzed. Zn application increased SPAD and Fv/Fm of wheat flag leaves, while decreased lipid peroxidation levels and H2O2 content...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28588597/protein-biochemistry-and-expression-regulation-of-cadmium-zinc-pumping-atpases-in-the-hyperaccumulator-plants-arabidopsis-halleri-and-noccaea-caerulescens
#10
Seema Mishra, Archana Mishra, Hendrik Küpper
P1B-ATPases are decisive for metal accumulation phenotypes, but mechanisms of their regulation are only partially understood. Here, we studied the Cd/Zn transporting ATPases NcHMA3 and NcHMA4 from Noccaea caerulescens as well as AhHMA3 and AhHMA4 from Arabidopsis halleri. Protein biochemistry was analyzed on HMA4 purified from roots of N. caerulescens in active state. Metal titration of NcHMA4 protein with an electrochromic dye as charge indicator suggested that HMA4 reaches maximal ATPase activity when all internal high-affinity Cd(2+) binding sites are occupied...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28587993/superoxide-responsive-gene-expression-in-arabidopsis-thaliana-and-zea-mays
#11
Junhuan Xu, Thu Tran, Carmen S Padilla Marcia, David M Braun, Fiona L Goggin
Superoxide (O2(-)) and other reactive oxygen species (ROS) are generated in response to numerous biotic and abiotic stresses. Different ROS have been reported to elicit different transcriptional responses in plants, and so ROS-responsive marker genes and promoter::reporter gene fusions have been proposed as indirect means of detecting ROS and discriminating among different species. However, further information about the specificity of transcriptional responses to O2(-) is needed in order to assess potential markers for this critical stress-responsive signaling molecule...
May 29, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/28586470/the-ida-like-peptides-idl6-and-idl7-are-negative-modulators-of-stress-responses-in-arabidopsis-thaliana
#12
Ane Kjersti Vie, Javad Najafi, Per Winge, Ester Cattan, Michael Wrzaczek, Jaakko Kangasjärvi, Gad Miller, Tore Brembu, Atle M Bones
Small signalling peptides have emerged as important cell to cell messengers in plant development and stress responses. However, only a few of the predicted peptides have been functionally characterized. Here, we present functional characterization of two members of the IDA-LIKE (IDL) peptide family in Arabidopsis thaliana, IDL6 and IDL7. Localization studies suggest that the peptides require a signal peptide and C-terminal processing to be correctly transported out of the cell. Both IDL6 and IDL7 appear to be unstable transcripts under post-transcriptional regulation...
June 6, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28586434/the-arabidopsis-cys2-his2-zinc-finger-transcription-factor-zat18-is-a-positive-regulator-of-plant-tolerance-to-drought-stress
#13
Mingzhu Yin, Yanping Wang, Lihua Zhang, Jinzhu Li, Wenli Quan, Li Yang, Qingfeng Wang, Zhulong Chan
Environmental stress poses a global threat to plant growth and reproduction, especially drought stress. Zinc finger proteins comprise a family of transcription factors that play essential roles in response to various abiotic stresses. Here, we found that ZAT18 (At3g53600), a nuclear C2H2 zinc finger protein, was transcriptionally induced by dehydration stress. Overexpression (OE) of ZAT18 in Arabidopsis improved drought tolerance while mutation of ZAT18 resulted in decreased plant tolerance to drought stress...
June 6, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28585012/variability-of-zinc-copper-and-lead-contents-in-sludge-of-the-municipal-stormwater-treatment-plant
#14
Tomasz Zubala, Magdalena Patro, Patrycja Boguta
Several years of observations enabled us to assess the extent and variability of heavy metal contamination (Zn, Cu and Pb) of the sludge of the municipal stormwater treatment plant (the town of Puławy, Poland). In terms of size (high capacity) and innovation, it is the only facility of this kind in the country. It collects rainwater run-offs from two catchments (separate inlets) with a total area of about 500 ha. The concentration of the analysed metals is characterised by a large spatial and temporal diversity...
June 6, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28584526/analyses-of-mineral-content-and-heavy-metal-of-honey-samples-from-south-and-east-region-of-turkey-by-using-icp-ms
#15
Serap Kılıç Altun, Hikmet Dinç, Nilgün Paksoy, Füsun Karaçal Temamoğulları, Mehmet Savrunlu
The substantial of mineral ingredients in honey may symbolize the existence of elements in the plants and soil of the vicinity wherein the honey was taken. The aim of this study was to detect the levels of 13 elements (Potassium (K), Sodium (Na), Calcium (Ca), Iron (Fe), Zinc (Zn), Cadmium (Cd), Copper (Cu), Manganese (Mn), Lead (Pb), Nickel (Ni), Chromium (Cr), Aluminum (Al), and Selenium (Se)) in unifloral and multifloral honey samples from south and east regions of Turkey. Survey of 71 honey samples from seven different herbal origins, picked up from the south and east region of Turkey, was carried out to determine their mineral contents during 2015-2016...
2017: International Journal of Analytical Chemistry
https://www.readbyqxmd.com/read/28578021/transcriptome-profiling-of-the-floral-buds-and-discovery-of-genes-related-to-sex-differentiation-in-the-dioecious-cucurbit-coccinia-grandis-l-voigt
#16
Jatindra Nath Mohanty, Sanghamitra Nayak, Sumita Jha, Raj Kumar Joshi
Dioecious species offer an inclusive structure to study the molecular basis of sexual dimorphism in angiosperms. Despite having a small genome and heteromorphic sex chromosomes, Coccinia grandis is a highly neglected dioecious species with little information available on its physical state, genetic orientation and key sex-defining elements. In the present study, we performed RNA-Seq and DGE analysis of male (MB) and female (FB) buds in C. grandis to gain insights into the molecular basis of sex determination in this plant...
May 31, 2017: Gene
https://www.readbyqxmd.com/read/28575946/microwave-assisted-extraction-as-an-efficient-approach-for-biosynthesis-of-zinc-oxide-nanoparticles-synthesis-characterization-and-biological-properties
#17
Hamid Reza Rajabi, Reza Naghiha, Mansoureh Kheirizadeh, Hamed Sadatfaraji, Ali Mirzaei, Zinab Moradi Alvand
In the present study, microwave assisted extraction (MAE) was applied as an efficient, green and rapid approach to prepare the aqueous extract of Suaeda aegyptiaca (SA) plant. The obtained aqueous extracts at two different irradiation power (90 and 270W; 15min) in MAE process as well as maceration method (24h) were used in a green and eco-friendly approach for the synthesis of zinc oxide nanoparticles (ZnO NPs). The synthesized ZnO NPs have been characterized via different techniques including UV-Vis absorption; fluorescence and Fourier transform infrared (FT-IR) spectroscopices, scanning electron microscopy (SEM), and X-ray diffraction (XRD)...
September 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28574163/heavy-metal-atpase-3-hma3-confers-cadmium-hypertolerance-on-the-cadmium-zinc-hyperaccumulator-sedum-plumbizincicola
#18
Huan Liu, Haixia Zhao, Longhua Wu, Anna Liu, Fang-Jie Zhao, Wenzhong Xu
Cadmium (Cd) is highly toxic to most organisms, but some rare plant species can hyperaccumulate Cd in aboveground tissues without suffering from toxicity. The mechanism underlying Cd detoxification by hyperaccumulators is interesting but unclear. Here, the heavy metal ATPase 3 (SpHMA3) gene responsible for Cd detoxification was isolated from the Cd/zinc (Zn) hyperaccumulator Sedum plumbizincicola. RNA interference (RNAi)-mediated silencing and overexpression of SpHMA3 were induced to investigate its physiological functions in S...
June 2, 2017: New Phytologist
https://www.readbyqxmd.com/read/28574161/osidd2-a-zinc-finger-and-indeterminate-domain-protein-regulates-secondary-cell-wall-formation-fa
#19
Peng Huang, Hideki Yoshida, Kenji Yano, Shunsuke Kinoshita, Kyosuke Kawai, Eriko Koketsu, Masako Hattori, Sayaka Takehara, Ji Huang, Ko Hirano, Reynante Lacsamana Ordonio, Makoto Matsuoka, Miyako Ueguchi-Tanaka
Previously, we found 123 transcription factors (TFs) as candidate regulators of secondary cell wall (SCW) formation in rice by using phylogenetic and co-expression network analyses. Among them, we examined in this work the role of OsIDD2, a zinc finger and indeterminate domain (IDD) family TF. Its overexpressors showed dwarfism, fragile leaves, and decreased lignin content, which are typical phenotypes of plants defective in SCW formation, whereas its knockout plants showed slightly increased lignin content...
June 2, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28572458/the-dnaj-like-zinc-finger-protein-hcf222-is-required-for-thylakoid-membrane-biogenesis
#20
Stephanie Hartings, Susanne Paradies, Bianca Karnuth, Sabrina Eisfeld, Jasmin Mehsing, Christian Wolff, Tatjana Levey, Peter Westhoff, Karin Meierhoff
To understand the biogenesis of the thylakoid membrane in higher plants and to identify auxiliary proteins required to build up this highly complex membrane system, we have characterized the allelic nuclear mutants high chlorophyll fluorescence (hcf) 222-1 and 222-2 and isolated the causal gene by map based cloning. In the ethyl methanesulfonate (EMS) induced mutant hcf222-1 the accumulation of the cytochrome b6f (Cytb6f) complex was reduced to 30% compared to the wild type. Other thylakoid membrane complexes accumulated to normal levels...
June 1, 2017: Plant Physiology
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