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https://www.readbyqxmd.com/read/29161311/expression-and-regulation-of-atl9-an-e3-ubiquitin-ligase-involved-in-plant-defense
#1
Fengyan Deng, Tingwei Guo, Mitchell Lefebvre, Steven Scaglione, Christopher J Antico, Tao Jing, Xin Yang, Weixing Shan, Katrina M Ramonell
Plants are continually exposed to a variety of pathogenic organisms, including bacteria, fungi and viruses. In response to these assaults, plants have developed various defense pathways to protect themselves from pathogen invasion. An understanding of the expression and regulation of genes involved in defense signaling is essential to controlling plant disease. ATL9, an Arabidopsis RING zinc finger protein, is an E3 ubiquitin ligase that is induced by chitin and involved in basal resistance to the biotrophic fungal pathogen, Golovinomyces cichoracearum (G...
2017: PloS One
https://www.readbyqxmd.com/read/29160685/graphene-oxide-a-new-carrier-for-slow-release-of-plant-micronutrients
#2
Shervin Kabiri, Fien Degryse, Diana N H Tran, Rodrigo da Silva, Michael J McLaughlin, Dusan Losic
The environmental problems and low efficiency associated with conventional fertilizers provides an impetus to develop advanced fertilizers with slower release and better performances. Here we report of development of a new carrier platform based on graphene oxide (GO) sheets that can provide a high loading of plant micronutrients with controllable slow release. To prove this concept two micronutrients zinc (Zn) and copper (Cu) were used to load on GO sheets and hence formulate GO-based micronutrients fertilizer...
November 21, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29158545/a-potent-cas9-derived-gene-activator-for-plant-and-mammalian-cells
#3
Zhenxiang Li, Dandan Zhang, Xiangyu Xiong, Bingyu Yan, Wei Xie, Jen Sheen, Jian-Feng Li
Overexpression of complementary DNA represents the most commonly used gain-of-function approach for interrogating gene functions and for manipulating biological traits. However, this approach is challenging and inefficient for multigene expression due to increased labour for cloning, limited vector capacity, requirement of multiple promoters and terminators, and variable transgene expression levels. Synthetic transcriptional activators provide a promising alternative strategy for gene activation by tethering an autonomous transcription activation domain (TAD) to an intended gene promoter at the endogenous genomic locus through a programmable DNA-binding module...
November 20, 2017: Nature Plants
https://www.readbyqxmd.com/read/29157887/spatial-patterns-of-heavy-metal-accumulation-in-sediments-and-macrophytes-of-bellandur-wetland-bangalore
#4
T V Ramachandra, P B Sudarshan, M K Mahesh, S Vinay
Heavy metals are one among the toxic chemicals and accumulation in sediments and plants has been posing serious health impacts. Wetlands aid as kidneys of the landscape and help in remediation through uptake of nutrients, heavy metals and other contaminants. The analyses of macrophytes and sediment samples help in evaluating pollution status in aquatic environment. In this study concentration of six heavy metals (Cadmium (Cd), Chromium (Cr), Copper (Cu), Nickel (Ni), Lead (Pb) and Zinc (Zn)) were assessed in sediment and dominant macrophyte samples collected from Bellandur Lake, largest Lake of Bangalore, India...
November 17, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/29148143/leaf-cell-membrane-stability-based-mechanisms-of-zinc-nutrient-in-mitigation-of-salinity-stress-in-rice
#5
Abdullah Tufail, Hong Li, Asif Naeem, Tingxian Li
Excess salts affect about 955 million ha of total arable lands worldwide and 49% of agricultural lands are Zn deficient. Soil salinity and zinc deficiency can intensify plant abiotic stress. The mechanisms by which Zn nutrients can mitigate salinity effects on plant functions are not well understood. We conducted an experiment to determine the zinc and salinity effects on rice plant retention of Zn, macronutrient potassium (K) and salt ion Na, chlorophyll formation, leaf cell membrane stability and grain yield, and to examine the mechanisms of zinc nutrition in mitigating salinity stress on plant physiological and nutritional aspects...
November 16, 2017: Plant Biology
https://www.readbyqxmd.com/read/29145471/arbuscular-mycorrhizal-strategy-for-zinc-mycoremediation-and-diminished-translocation-to-shoots-and-grains-in-wheat
#6
Abdelghafar M Abu-Elsaoud, Nivien A Nafady, Ahmed M Abdel-Azeem
Mycoremediation is an on-site remediation strategy, which employs fungi to degrade or sequester contaminants from the environment. The present work focused on the bioremediation of soils contaminated with zinc by the use of a native mycorrhizal fungi (AM) called Funneliformis geosporum (Nicol. & Gerd.) Walker & Schüßler. Experiments were performed using Triticum aestivum L. cv. Gemmeza-10 at different concentrations of Zn (50, 100, 200 mg kg-1) and inoculated with or without F. geosporum. The results showed that the dry weight of mycorrhizal wheat increased at Zn stressed plants as compared to the non-Zn-stressed control plants...
2017: PloS One
https://www.readbyqxmd.com/read/29143884/biominerals-and-waxes-of-calamagrostis-epigejos-and-phragmites-australis-leaves-from-post-industrial-habitats
#7
Ewa Talik, Adam Guzik, Eugeniusz Małkowski, Gabriela Woźniak, Edyta Sierka
Vascular plants are able to conduct biomineralization processes and collect synthesized compounds in their internal tissues or to deposit them on their epidermal surfaces. This mechanism protects the plant from fluctuations of nutrient levels caused by different levels of supply and demand for them. The biominerals reflect both the metabolic characteristics of a vascular plant species and the environmental conditions of the plant habitat. The SEM/EDX method was used to examine the surface and cross-sections of the Calamagrostis epigejos and Phragmites australis leaves from post-industrial habitats (coal and zinc spoil heaps)...
November 16, 2017: Protoplasma
https://www.readbyqxmd.com/read/29138428/structural-disorder-and-induced-folding-within-two-cereal-aba-stress-and-ripening-asr-proteins
#8
Karama Hamdi, Edoardo Salladini, Darragh P O'Brien, Sébastien Brier, Alexandre Chenal, Ines Yacoubi, Sonia Longhi
Abscisic acid (ABA), stress and ripening (ASR) proteins are plant-specific proteins involved in plant response to multiple abiotic stresses. We previously isolated the ASR genes and cDNAs from durum wheat (TtASR1) and barley (HvASR1). Here, we show that HvASR1 and TtASR1 are consistently predicted to be disordered and further confirm this experimentally. Addition of glycerol, which mimics dehydration, triggers a gain of structure in both proteins. Limited proteolysis showed that they are highly sensitive to protease degradation...
November 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29134519/capability-of-secale-montanum-trusted-for-phytoremediation-of-lead-and-cadmium-in-soils-amended-with-nano-silica-and-municipal-solid-waste-compost
#9
Mehdi Moameri, Masoomeh Abbasi Khalaki
The purpose of this study is to evaluate the capability of Secale montanum trusted for phytoremediation of contaminated soils with lead (Pb) and cadmium (Cd). To conduct this study, soil samples were taken from contaminated rangelands soils around National Lead & Zinc Factory, Zanjan, Iran. In this study, which was performed in a greenhouse, after preparing the pot and treating soils with nano-silica (NS) and municipal solid waste compost (MSWC) amendments, 20 Secale seeds were cultured in each pot. The translocation factor (TF), the bio-concentration factor (BCF), and remediation factor (RF) were calculated to determine the phytoremediation capability of Secale...
November 13, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29133823/identification-of-mirna-mediated-drought-responsive-multi-tiered-regulatory-network-in-drought-tolerant-rice-nagina-22
#10
Sonia Balyan, Mukesh Kumar, Roseeta Devi Mutum, Utkarsh Raghuvanshi, Priyanka Agarwal, Saloni Mathur, Saurabh Raghuvanshi
Comparative characterization of microRNA-mediated stress regulatory networks in contrasting rice cultivars is critical to decipher plant stress response. Consequently, a multi-level comparative analysis, using sRNA sequencing, degradome analysis, enzymatic and metabolite assays and metal ion analysis, in drought tolerant and sensitive rice cultivars was conducted. The study identified a group of miRNAs "Cultivar-specific drought responsive" (CSDR)-miRNAs (osa-miR159f, osa-miR1871, osa-miR398b, osa-miR408-3p, osa-miR2878-5p, osa-miR528-5p and osa-miR397a) that were up-regulated in the flag-leaves of tolerant cultivar, Nagina 22 (N22) and Vandana, but down-regulated in the sensitive cultivar, Pusa Basmati 1 (PB1) and IR64, during drought...
November 13, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29128767/biochar-alleviates-phytotoxicity-in-ficus-elastica-grown-in-zn-contaminated-soil
#11
Abhay Kumar, Ludmila Tsechansky, Beni Lew, Eran Raveh, Omer Frenkel, Ellen R Graber
Zinc (Zn) immobilization by two distinct biochars in soil, together with concomitant alleviation of phytotoxic responses in Ficus elastica Roxb. ex Hornem., were examined. Rooted cuttings of F. elastica were grown in 880mgkg(-1) Zn-spiked sandy soil amended with grain husk (GH) or cattle manure (CM) biochar at 0, 10, 30 and 50gkg(-1) soil for a period of 6months. Addition of both GH and CM biochars had significant positive impacts on physiological parameters such as plant growth, leaf relative water content, photosynthetic pigments and leaf gas exchange characteristics...
November 9, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29124638/foliar-application-with-nano-silicon-reduced-cadmium-accumulation-in-grains-by-inhibiting-cadmium-translocation-in-rice-plants
#12
Rui Chen, Changbo Zhang, Yanling Zhao, Yongchun Huang, Zhongqi Liu
Nano-silicon (Si) may be more effective than regular fertilizers in protecting plants from cadmium (Cd) stress. A field experiment was conducted to study the effects of nano-Si on Cd accumulation in grains and other organs of rice plants (Oryza sativa L. cv. Xiangzaoxian 45) grown in Cd-contaminated farmland. Foliar application with 5~25 mM nano-Si at anthesis stage reduced Cd concentrations in grains and rachises at maturity stage by 31.6~64.9 and 36.1~60.8%, respectively. Meanwhile, nano-Si application significantly increased concentrations of potassium (K), magnesium (Mg), and iron (Fe) in grains and rachises, but imposed little effect on concentrations of calcium (Ca), zinc (Zn), and manganese (Mn) in them...
November 9, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29123940/influence-of-digestion-procedure-and-residual-carbon-on-manganese-copper-and-zinc-determination-in-herbal-matrices-by-atomic-absorption-spectrometry
#13
Dorota Adamczyk-Szabela, Piotr Anielak, Wojciech M Wolf
Mineralization to the complete oxidation of sample carbon component does not always assure the best analyte recovery. Particular attention should be paid to the presence of silicon in the investigated plant sample and especially in the certified reference material for which Si content is scarcely given by the providers. During mineralization without addition of the hydrofluoric acid, the residual carbon may block silica surfaces and increase availability of an analyte for its spectral determination in the solution...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/29123537/association-mapping-of-ferrous-zinc-and-aluminum-tolerance-at-the-seedling-stage-in-indica-rice-using-magic-populations
#14
Lijun Meng, Baoxiang Wang, Xiangqian Zhao, Kimberly Ponce, Qian Qian, Guoyou Ye
Excessive amounts of metal are toxic and severely affect plant growth and development. Understanding the genetic control of metal tolerance is crucial to improve rice resistance to Fe, Zn, and Al toxicity. The multi-parent advanced generation inter-cross (MAGIC) populations were genotyped using a 55 K rice SNP array and screened at the seedling stage for Fe, Zn, and Al toxicity using a hydroponics system. Association analysis was conducted by implementing a mixed linear model (MLM) for each of the five MAGIC populations double cross DC1 (founders were SAGC-08, HHZ5-SAL9-Y3-Y1, BP1976B-2-3-7-TB-1-1, PR33282-B-8-1-1-1-1-1), double cross DC2 (founders of double cross were FFZ1, CT 16658-5-2-2SR-2-3-6MP, IR 68, IR 02A127), eight parents population 8way (founders were SAGC-08, HHZ5-SAL9-Y3-Y1, BP1976B-2-3-7-TB-1-1, PR33282-B-8-1-1-1-1-1, FFZ1, CT 16658-5-2-2SR-2-3-6MP, IR 68, IR 02A127), DC12 (DC1+DC2) and rice multi-parent recombinant inbred line population RMPRIL (DC1+DC2+8way)...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29121354/exogenous-glutathione-enhances-cadmium-accumulation-and-alleviates-its-toxicity-in-populus-%C3%A3-canescens
#15
Shen Ding, Chaofeng Ma, Wenguang Shi, Wenzhe Liu, Yan Lu, Qifeng Liu, Zhi-Bin Luo
Glutathione (GSH) plays an important role in cadmium (Cd) tolerance in woody plants, but the underlying mechanisms remain largely unknown. To elucidate the physiological and transcriptional regulation mechanisms of GSH-mediated Cd tolerance in woody plants, we exposed Populus × canescens (Ait.) Smith saplings to either 0 or 75 μM Cd together with one of three external GSH levels. Glutathione treatments include buthionine sulfoximine (BSO, an inhibitor of GSH biosynthesis), no external GSH and exogenous GSH...
November 7, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29113062/effects-of-chitooligosaccharide-coating-combined-with-selected-ionic-polymers-on-the-stimulation-of-ornithogalum-saundersiae-growth
#16
Piotr Salachna, Monika Grzeszczuk, Marcin Soból
Recently, agricultural and horticultural sectors have shown an increased interest in the use of biopolymers and their derivatives as growth biostimulators. So far, coating is a little known method of applying the biostimulators. Our three-year study investigated coating the bulbs of Ornithogalum saundersiae with chitooligosaccharide (COS), sodium alginate, carrageenan, gellan gum and xanthan gum. The coating method was based on the formation of polyelectrolyte complexes. The COS with 48,000 g mol(-1) molecular weight was contained by means of controlled free-radical degradation...
November 4, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/29111597/responses-of-an-adventitious-fast-growing-plant-to-photodynamic-stress-comparative-study-of-anionic-and-cationic-porphyrin-effect-on-arabidopsis-thaliana
#17
Mohammad Issawi, Damien Guillaumot, Vincent Sol, Catherine Riou
Antimicrobial Photodynamic Treatment based on the use of a photosensitizer to produce reactive oxygen species that induce cell death could be envisaged to fight against plant pathogens. For setting this strategy, we want to study how plants themselves respond to photodynamic treatment. In a previous work we showed that tomato plantlets were able to resist to photoactivated tetra (N-methylpyridyl) porphyrin (CP) or Zinc metalated form (CP-Zn). To enlarge our plant expertise related to exogenous porphyrins treatment and to further defend this approach, we studied how an adventice like Arabidopsis thaliana responded to exogenous supply of anionic and cationic porphyrins...
November 7, 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/29106954/the-ascorbate-peroxidase-apx1-is-a-direct-target-of-a-zinc-finger-transcription-factor-zfp36-and-a-late-embryogenesis-abundant-protein-oslea5-interacts-with-zfp36-to-co-regulate-osapx1-in-seed-germination-in-rice
#18
Liping Huang, Jing Jia, Xixi Zhao, MengYao Zhang, Xingxiu Huang, E Ji, Lan Ni, Mingyi Jiang
Seed germination is a vital developmental process. Abscisic acid (ABA) is an essential repressor of seed germination, while ROS (reactive oxygen species) also plays a vital role in regulating seed germination. ABA could inhibit the production of ROS in seed germination, but the mechanism of ABA reduced ROS production in seed germination was hitherto unknown. Here, by ChIP (chromatin immunoprecipitation)-seq, we found that ZFP36, a rice zinc finger transcription factor, could directly bind to the promoter of OsAPX1, coding an ascorbate peroxidase (APX) which has the most affinity for H2O2 (substrate; a type of ROS), and act as a transcriptional activator of OsAPX1 promoter...
October 26, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29103938/etiolated-seedling-development-requires-repression-of-photomorphogenesis-by-a-small-cell-wall-derived-dark-signal
#19
Scott A Sinclair, Camille Larue, Laura Bonk, Asif Khan, Hiram Castillo-Michel, Ricardo J Stein, Daniel Grolimund, Dominik Begerow, Ulla Neumann, Michael J Haydon, Ute Krämer
Etiolated growth in darkness or the irreversible transition to photomorphogenesis in the light engages alternative developmental programs operating across all organs of a plant seedling. Dark-grown Arabidopsis de-etiolated by zinc (dez) mutants exhibit morphological, cellular, metabolic, and transcriptional characteristics of light-grown seedlings. We identify the causal mutation in TRICHOME BIREFRINGENCE encoding a putative acyl transferase. Pectin acetylation is decreased in dez, as previously found in the reduced wall acetylation2-3 mutant, shown here to phenocopy dez...
November 20, 2017: Current Biology: CB
https://www.readbyqxmd.com/read/29084273/genome-wide-identification-and-characterization-of-cacao-wrky-transcription-factors-and-analysis-of-their-expression-in-response-to-witches-broom-disease
#20
Dayanne Silva Monteiro de Almeida, Daniel Oliveira Jordão do Amaral, Luiz-Eduardo Del-Bem, Emily Bronze Dos Santos, Raner José Santana Silva, Karina Peres Gramacho, Michel Vincentz, Fabienne Micheli
Transcriptional regulation, led by transcription factors (TFs) such as those of the WRKY family, is a mechanism used by the organism to enhance or repress gene expression in response to stimuli. Here, we report on the genome-wide analysis of the Theobroma cacao WRKY TF family and also investigate the expression of WRKY genes in cacao infected by the fungus Moniliophthora perniciosa. In the cacao genome, 61 non-redundant WRKY sequences were found and classified in three groups (I to III) according to the WRKY and zinc-finger motif types...
2017: PloS One
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