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Zinc transporter plant

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https://www.readbyqxmd.com/read/29121354/exogenous-glutathione-enhances-cadmium-accumulation-and-alleviates-its-toxicity-in-populus-%C3%A3-canescens
#1
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/29048564/phytosiderophores-determine-thresholds-for-iron-and-zinc-accumulation-in-biofortified-rice-endosperm-while-inhibiting-the-accumulation-of-cadmium
#2
Raviraj Banakar, Ana Alvarez Fernandez, Pablo Díaz-Benito, Javier Abadia, Teresa Capell, Paul Christou
Nicotianamine (NA) and 2'-deoxymugenic acid (DMA) are metal-chelating ligands that promote the accumulation of metals in rice endosperm, but it is unclear how these phytosiderophores regulate the levels of different metals and limit their accumulation. In this study, transgenic rice plants producing high levels of NA and DMA accumulated up to 4-fold more iron (Fe) and 2-fold more zinc (Zn) in the endosperm compared with wild-type plants. The distribution of Fe and Zn in vegetative tissues suggested that both metals are sequestered as a buffering mechanism to avoid overloading the seeds...
October 13, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/29047263/cross-talk-between-phosphate-starvation-and-other-environmental-stress-signaling-pathways-in-plants
#3
REVIEW
Dongwon Baek, Hyun Jin Chun, Dae-Jin Yun, Min Chul Kim
The maintenance of inorganic phosphate (Pi) homeostasis is essential for plant growth and yield. Plants have evolved strategies to cope with Pi starvation at the transcriptional, post-transcriptional, and post-translational levels, which maximizes its availability. Many transcription factors, miRNAs, and transporters participate in the Pi starvation signaling pathway where their activities are modulated by sugar and phytohormone signaling. Environmental stresses significantly affect the uptake and utilization of nutrients by plants, but their effects on the Pi starvation response remain unclear...
October 2017: Molecules and Cells
https://www.readbyqxmd.com/read/29028613/divergent-biology-of-facultative-heavy-metal-plants
#4
REVIEW
Hermann Bothe, Aneta Słomka
Among heavy metal plants (the metallophytes), facultative species can live both in soils contaminated by an excess of heavy metals and in non-affected sites. In contrast, obligate metallophytes are restricted to polluted areas. Metallophytes offer a fascinating biology, due to the fact that species have developed different strategies to cope with the adverse conditions of heavy metal soils. The literature distinguishes between hyperaccumulating, accumulating, tolerant and excluding metallophytes, but the borderline between these categories is blurred...
September 7, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28993932/genome-wide-identification-of-cd-responsive-nramp-transporter-genes-and-analyzing-expression-of-nramp-1-mediated-by-mir167-in-brassica-napus
#5
Jin Guo Meng, Xian Duo Zhang, Shang Kun Tan, Kai Xuan Zhao, Zhi Min Yang
In plants, metal transporters are responsible for metal uptake, translocation and homeostasis. These metals include essential nutrients such as zinc (Zn) and manganese (Mn) or non-essential metals like cadmium (Cd) and lead (Pb). Although a few metal transporters have been well characterized in model plants, little is known about their functionality in rapeseed (Brassica napus). In the study, 22 NRAMP transporter genes from B. napus genome were identified and annotated using bioinformatics and high-throughput RNA-sequencing (RNA-seq)...
October 9, 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
https://www.readbyqxmd.com/read/28964989/heavy-metals-in-food-crops-soil-and-water-in-the-lihe-river-watershed-of-the-taihu-region-and-their-potential-health-risks-when-ingested
#6
Lian Chen, Shenglu Zhou, Yaxing Shi, Chunhui Wang, Baojie Li, Yan Li, Shaohua Wu
Environmental pollution by heavy metals resulting from rapid economic development is a major concern. Soil, water, wheat, and rice samples were collected from the Lihe River Watershed in the Taihu Region (east China). In this study area, many types of industrial plants, including ceramics factories, plants working with refractory materials, and chemical plants are densely distributed and cause serious heavy metal pollution. In addition, well-developed transportation and agricultural activities are also important sources of heavy metals...
February 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/28912786/co-infection-of-sweet-orange-with-severe-and-mild-strains-of-citrus-tristeza-virus-is-overwhelmingly-dominated-by-the-severe-strain-on-both-the-transcriptional-and-biological-levels
#7
Shimin Fu, Jonathan Shao, Changyong Zhou, John S Hartung
Citrus tristeza is one of the most destructive citrus diseases and is caused by the phloem-restricted Closterovirus, Citrus tristeza virus. Mild strain CTV-B2 does not cause obvious symptoms on indicators whereas severe strain CTV-B6 causes symptoms, including stem pitting, cupping, yellowing, and stiffening of leaves, and vein corking. Our laboratory has previously characterized changes in transcription in sweet orange separately infected with CTV-B2 and CTV-B6. In the present study, transcriptome analysis of Citrus sinensis in response to double infection by CTV-B2 and CTV-B6 was carried out...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28878495/the-expression-of-a-candidate-cucumber-fruit-sugar-starvation-marker-gene-cssef1-is-enhanced-in-malformed-fruit-induced-by-salinity
#8
Akio Tazuke, Tsuguki Kinoshita, Munehiko Asayama
The cucumber (Cucumis sativus L.) gene Cucumis sativus Somatic Embryogenesis Zinc Finger 1 (CsSEF1) was suggested to be a good marker gene for sugar starvation in fruit. The expression of this gene in fruits is dramatically upregulated in plants that have suffered either complete defoliation or prolonged darkness. CsSEF1 was initially discovered as a gene that was upregulated during somatic embryogenesis. We examined the difference in fruit parts and the effect of pollination on the upregulation of CsSEF1 induced by defoliation treatment...
July 2017: Physiology and Molecular Biology of Plants: An International Journal of Functional Plant Biology
https://www.readbyqxmd.com/read/28868060/absorption-kinetics-and-subcellular-fractionation-of-zinc-in-winter-wheat-in-response-to-nitrogen-supply
#9
Zhaojun Nie, Peng Zhao, Jia Wang, Jinfeng Li, Hongen Liu
Nitrogen (N) is critical for zinc (Zn) absorption into plant roots; this in turn allows for Zn accumulation and biofortification of grain in winter wheat (Triticum aestivum L.), an important food crop. However, little is known about root morphology and subcellular Zn distribution in response to N treatment at different levels of Zn supply. In this study, two nutrient solution culture experiments were conducted to examine Zn accumulation, Zn absorption kinetics, root morphology, and Zn subcellular distribution in wheat seedlings pre-cultured with different N concentrations...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28855023/fate-and-toxicity-of-zinc-oxide-nanomaterial-in-municipal-wastewaters
#10
Josh Smeraldi, Rajagopalan Ganesh, Turaj Hosseini, Leila Khatib, Betty H Olson, Diego Rosso
  The production of zinc nanomaterial has increased significantly over the past several years and, as a result, nanoparticles have navigated their way into wastewater streams. The transportation and toxicity of zinc nanomaterial within the wastewater treatment processes is not well known. In this study, the zinc nanomaterial and its fate were characterized in an activated sludge treatment process. The tests performed included batch studies to evaluate abiotic and biotic removal, toxicity studies to evaluate inhibition to coliform and nitrifying bacteria, and bioreactor studies to evaluate impact on operating parameters...
September 1, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28827455/transdetect-identifies-a-new-regulatory-module-controlling-phosphate-accumulation
#11
Sikander Pal, Mushtak Kisko, Christian Dubos, Benoit Lacombe, Pierre Berthomieu, Gabriel Krouk, Hatem Rouached
Identifying transcription factor (TFs) cooperation controlling target gene expression is still an arduous challenge. The accuracy of current methods at genome scale significantly drops with the increase in number of genes, which limits their applicability to more complex genomes, like animals and plants. Here, we developed an algorithm, TransDetect, able to predict TF combinations controlling the expression level of a given gene. TransDetect was used to identify novel TF modules regulating the expression of Arabidopsis (Arabidopsis thaliana) phosphate transporter PHO1;H3 comprising MYB15, MYB84, bHLH35, and ICE1...
October 2017: Plant Physiology
https://www.readbyqxmd.com/read/28803149/concentrations-of-polycyclic-aromatic-hydrocarbons-and-trace-elements-in-arctic-soils-a-case-study-in-svalbard
#12
Montse Marquès, Jordi Sierra, Tatiana Drotikova, Montse Mari, Martí Nadal, José L Domingo
A combined assessment on the levels and distribution profiles of polycyclic aromatic hydrocarbons (PAHs) and trace elements in soils from Pyramiden (Central Spitsbergen, Svalbard Archipelago) is here reported. As previously stated, long-range atmospheric transport, coal deposits and previous mining extractions, as well as the stack emissions of two operative power plants at this settlement are considered as potential sources of pollution. Eight top-layer soil samples were collected and analysed for the 16 US EPA priority PAHs and for 15 trace elements (As, Be, Cd, Co, Cr, Cu, Hg, Mn, Mo, Ni, Pb, Sn, Tl, V and Zn) during late summer of 2014...
November 2017: Environmental Research
https://www.readbyqxmd.com/read/28763829/f-group-bzips-in-barley-a-role-in-zn-deficiency
#13
Ahmad Zulhilmi Nazri, Jonathan H C Griffin, Kerry A Peaston, Douglas G A Alexander-Webber, Lorraine E Williams
Zinc (Zn) deficiency negatively impacts the development and health of plants and affects crop yield. When experiencing low Zn, plants undergo an adaptive response to maintain Zn homeostasis. We provide further evidence for the role of F-group transcription factors, AtbZIP19 and AtbZIP23, in responding to Zn deficiency in Arabidopsis and demonstrate the sensitivity and specificity of this response. Despite their economic importance, the role of F-group bZIPs in cereal crops is largely unknown. Here, we provide new insights by functionally characterizing these in barley (Hordeum vulgare), demonstrating an expanded number of F-group bZIPs (seven) compared to Arabidopsis...
November 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28732146/medicago-truncatula-zinc-iron-permease6-provides-zinc-to-rhizobia-infected-nodule-cells
#14
Isidro Abreu, Ángela Saéz, Rosario Castro-Rodríguez, Viviana Escudero, Benjamín Rodríguez-Haas, Marta Senovilla, Camille Larue, Daniel Grolimund, Manuel Tejada-Jiménez, Juan Imperial, Manuel González-Guerrero
Zinc is a micronutrient required for symbiotic nitrogen fixation. It has been proposed that in model legume Medicago truncatula, zinc is delivered by the root vasculature into the nodule and released in the infection/differentiation zone. There, transporters must introduce this element into rhizobia-infected cells to metallate the apoproteins that use zinc as a cofactor. MtZIP6 (Medtr4g083570) is an M. truncatula Zinc-Iron Permease (ZIP) that is expressed only in roots and nodules, with the highest expression levels in the infection/differentiation zone...
July 21, 2017: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28684433/wheat-vacuolar-iron-transporter-tavit2-transports-fe-and-mn-and-is-effective-for-biofortification
#15
James M Connorton, Eleanor R Jones, Ildefonso Rodríguez-Ramiro, Susan Fairweather-Tait, Cristobal Uauy, Janneke Balk
Increasing the intrinsic nutritional quality of crops, known as biofortification, is viewed as a sustainable approach to alleviate micronutrient deficiencies. In particular, iron deficiency anemia is a major global health issue, but the iron content of staple crops such as wheat (Triticum aestivum) is difficult to change because of genetic complexity and homeostasis mechanisms. To identify target genes for the biofortification of wheat, we functionally characterized homologs of the VACUOLAR IRON TRANSPORTER (VIT)...
August 2017: Plant Physiology
https://www.readbyqxmd.com/read/28672234/zinc-fertilisation-increases-grain-zinc-and-reduces-grain-lead-and-cadmium-concentrations-more-in-zinc-biofortified-than-standard-wheat-cultivar
#16
Muhammad Qaswar, Shahid Hussain, Zed Rengel
Given that plant uptake and transport systems for metals have some similarities, zinc (Zn)-biofortified cultivars may concurrently accumulate non-essential toxic heavy metals in grains. However, Zn-biofortified cultivars have never been tested for heavy metal accumulation in grains. In a pot experiment, we compared Zn-biofortified wheat (Zincol-2016) with a standard wheat (Faisalabad-2008) cultivar on heavy-metal-contaminated soils for yield response and grain accumulation of Zn, lead (Pb) and cadmium (Cd), without or with Zn fertilisation (8mgZnkg(-1))...
December 15, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28630437/phylogenetic-analysis-of-f-bzip-transcription-factors-indicates-conservation-of-the-zinc-deficiency-response-across-land-plants
#17
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/28588597/protein-biochemistry-and-expression-regulation-of-cadmium-zinc-pumping-atpases-in-the-hyperaccumulator-plants-arabidopsis-halleri-and-noccaea-caerulescens
#18
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/28586470/the-ida-like-peptides-idl6-and-idl7-are-negative-modulators-of-stress-responses-in-arabidopsis-thaliana
#19
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 15, 2017: Journal of Experimental Botany
https://www.readbyqxmd.com/read/28574163/heavy-metal-atpase-3-hma3-confers-cadmium-hypertolerance-on-the-cadmium-zinc-hyperaccumulator-sedum-plumbizincicola
#20
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
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