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Zinc transporter plant

Soisungwan Satarug
Cadmium (Cd) is a food-chain contaminant that has high rates of soil-to-plant transference. This phenomenon makes dietary Cd intake unavoidable. Although long-term Cd intake impacts many organ systems, the kidney has long been considered to be a critical target of its toxicity. This review addresses how measurements of Cd intake levels and its effects on kidneys have traditionally been made. These measurements underpin the derivation of our current toxicity threshold limit and tolerable intake levels for Cd...
March 10, 2018: Toxics
Qiang Zhang, Chuan Xia, Lichao Zhang, Chunhao Dong, Xu Liu, Xiuying Kong
Leaf senescence is an important agronomic trait that affects both crop yield and quality. In this study, we characterized a premature leaf senescence mutant of wheat ( Triticum aestivum L.) obtained by ethylmethane sulfonate (EMS) mutagenesis, named m68 . Genetic analysis showed that the leaf senescence phenotype of m68 is controlled by a single recessive nuclear gene. We compared the transcriptome of wheat leaves between the wild type (WT) and the m68 mutant at four time points. Differentially expressed gene (DEG) analysis revealed many genes that were closely related to senescence genes...
March 10, 2018: International Journal of Molecular Sciences
Tolunay B Aydemir, Robert J Cousins
The SLC39A family of metal transporters was identified through homologies with the Zrt- and Irt-like (ZIP) proteins from yeast and plants. Of all the ZIP transporters, ZIP14 is arguably the most robustly characterized in terms of function at the integrative level. Mice with a global knockout of Zip14 are viable, thus providing the opportunity to conduct physiologic experiments. In mice, Zip14 expression is highly tissue specific, with the greatest abundance in the jejunum > liver > heart > kidney > white adipose tissue > skeletal muscle > spleen > pancreas...
February 1, 2018: Journal of Nutrition
Mushtak Kisko, Nadia Bouain, Alaeddine Safi, Anna Medici, Robert C Akkers, David Secco, Gilles Fouret, Gabriel Krouk, Mark Gm Aarts, Wolfgang Busch, Hatem Rouached
All living organisms require a variety of essential elements for their basic biological functions. While the homeostasis of nutrients is highly intertwined, the molecular and genetic mechanisms of these dependencies remains poorly understood. Here, we report a discovery of a molecular pathway that control phosphate (Pi) accumulation plants in Zn deficiency. Using genome-wide association studies we first identified allelic variation of the Lyso-PhosphatidylCholine (PC) AcylTransferase 1 ( LPCAT1 ) gene as the key determinant of shoot Pi accumulation under Zn deficiency...
February 17, 2018: ELife
Elisa Andresen, Edgar Peiter, Hendrik Küpper
Many trace metals are essential micronutrients, but also potent toxins. Due to natural and anthropogenic causes, vastly different trace metal concentrations occur in various habitats, ranging from deficient to toxic levels. Therefore, one focus of plant research is on the response to trace metals in terms of uptake, transport, sequestration, speciation, physiological use, deficiency, toxicity, and detoxification. In this review, we cover most of these aspects for the essential micronutrients copper, iron, manganese, molybdenum, nickel, and zinc to provide a broader overview than found in other recent reviews, to cross-link aspects of knowledge in this very active research field that are often seen in a separated way...
February 13, 2018: Journal of Experimental Botany
Guangxu Zhu, Huayun Xiao, Qingjun Guo, Bo Song, Guodi Zheng, Zhongyi Zhang, Jingjing Zhao, Chukwunonso Peter Okoli
A field investigation on the content of heavy metals in soils and 17 kinds of dominant plants from wasteland of the downstream of a Pb-Zn mine in Northwest Guangxi Zhuang Autonomous Region was carried out. The absorption and accumulation characteristics of heavy metals between plants and soil were compared, and the candidate species for ecosystem restoration of the area were selected. The results indicated that the soils had been subjected to pollution of heavy metals in varying degrees. The concentrations of Cd, Pb, Zn were 46...
February 1, 2018: Ecotoxicology and Environmental Safety
Eric T Christenson, Austin S Gallegos, Anirban Banerjee
Iron is universally important to cellular metabolism and mitoferrins-1 and -2 have been proposed to be the iron importers of mitochondria, the cell's assembly plant of heme and iron-sulfur clusters. These iron-containing prosthetic groups are critical for a host of physiological processes ranging from oxygen transport and energy consumption to maintaining protein structural integrity. Mitoferrin-1 (Mfrn1) belongs to the mitochondrial carrier (MC) family and is atypical given its putative metallic cargo; most MCs transport nucleotides, amino acids, or other small to medium-size metabolites...
January 5, 2018: Journal of Biological Chemistry
Xian Duo Zhang, Jin Guo Meng, Kai Xuan Zhao, Xi Chen, Zhi Min Yang
In higher plants, heavy metal transporters are responsible for metal uptake, translocation and homeostasis. These metals include essential metals such as zinc (Zn) or manganese (Mn) and non-essential metals like cadmium (Cd) or lead (Pb). Although a few heavy metal transporters have been well identified in model plants (e.g. Arabidopsis and rice), little is known about their functionality in rapeseed (Brassica napus). B. napus is an important oil crop ranking the third largest sources of vegetable oil over the world...
February 2018: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
Laura Coninx, Anneleen Thoonen, Eli Slenders, Emmanuelle Morin, Natascha Arnauts, Michiel Op De Beeck, Annegret Kohler, Joske Ruytinx, Jan V Colpaert
Zinc (Zn) is an essential micronutrient but may become toxic when present in excess. In Zn-contaminated environments, trees can be protected from Zn toxicity by their root-associated micro-organisms, in particular ectomycorrhizal fungi. The mechanisms of cellular Zn homeostasis in ectomycorrhizal fungi and their contribution to the host tree's Zn status are however not yet fully understood. The aim of this study was to identify and characterize transporters involved in Zn uptake in the ectomycorrhizal fungus Suillus luteus, a cosmopolitan pine mycobiont...
2017: Frontiers in Microbiology
Hasan T Imam, Claudia A Blindauer
The dynamics of metal binding to and transfer from metalloproteins involved in metal homeostasis are important for understanding cellular distribution of metal ions. The dicotyledonous plant Arabidopsis thaliana has two type 4 seed-specific metallothionein homologues, MT4a and MT4b, with likely roles in zinc(II) homeostasis. These two metallothioneins are 84% identical, with full conservation of all metal-binding cysteine and histidine residues. Yet, differences in their spatial and temporal expression patterns suggested divergence in their biological roles...
January 2018: Journal of Biological Inorganic Chemistry: JBIC
Sébastien Lhospice, Nicolas Oswaldo Gomez, Laurent Ouerdane, Catherine Brutesco, Ghassan Ghssein, Christine Hajjar, Ahmed Liratni, Shuanglong Wang, Pierre Richaud, Sophie Bleves, Geneviève Ball, Elise Borezée-Durant, Ryszard Lobinski, David Pignol, Pascal Arnoux, Romé Voulhoux
Metal uptake is vital for all living organisms. In metal scarce conditions a common bacterial strategy consists in the biosynthesis of metallophores, their export in the extracellular medium and the recovery of a metal-metallophore complex through dedicated membrane transporters. Staphylopine is a recently described metallophore distantly related to plant nicotianamine that contributes to the broad-spectrum metal uptake capabilities of Staphylococcus aureus. Here we characterize a four-gene operon (PA4837-PA4834) in Pseudomonas aeruginosa involved in the biosynthesis and trafficking of a staphylopine-like metallophore named pseudopaline...
December 7, 2017: Scientific Reports
Prashant Kumar Singh, Mengmeng Tang, Sudhir Kumar, Alok Kumar Shrivastava
Cadmium is a non-essential toxic heavy metal for organisms, including plants and cyanobacteria. Cadmium resistance transporters involved in resistance of cells against various toxicants such as drugs and effluxes cytotoxic compounds from cells. However, cadmium resistance-associated protein (CadD) has never been reported from a diazotrophic cyanobacterium Anabaena sp. To test whether the hypothetical protein All3255 of Anabaena sp. PCC7120 a homolog of cadmium resistance-associated protein (CadD) involved in cadmium or heavy metal resistance or not, cloning and heterologous expression analysis of all3255 performed in Escherichia coli BL21 (DE3)...
November 30, 2017: Archives of Microbiology
Muhammad Azher Nawaz, Yanyan Jiao, Chen Chen, Fareeha Shireen, Zuhua Zheng, Muhammad Imtiaz, Zhilong Bie, Yuan Huang
Vanadium (V) is an important heavy metal with ubiquitous presence in the Earth's crust, but limited information is available as to its effect on plants and management strategies. Melatonin is a widely studied biomolecule; it acts as an antioxidant and a signaling molecule that enhances the abiotic stress tolerance of plants. Melatonin improves copper, zinc, and cadmium tolerance in plants. In this study, we investigated the response of watermelon seedlings to V stress and the potential role of melatonin in enhancing V stress tolerance of watermelon seedlings...
January 2018: Journal of Plant Physiology
Yongjie Yang, Jiangmin Chen, Qina Huang, Shaoqing Tang, Jianlong Wang, Peisong Hu, Guosheng Shao
Cadmium (Cd) accumulation in rice is strongly controlled by liming, but information on the use of liming to control Cd accumulation in rice grown in slightly acidic soils is inconsistent. Here, pot experiments were carried out to investigate the mechanisms of liming on Cd accumulation in two rice varieties focusing on two aspects: available/exchangeable Cd content in soils that were highly responsive to liming, and Cd uptake and transport capacity in the roots of rice in terms of Cd accumulation-relative gene expression...
November 15, 2017: Chemosphere
Joseph J Richardson, Kang Liang
Plants have a complex passive fluid transport system capable of internalizing small molecules from the environment, and this system offers an ideal route for augmenting plants with functional nanomaterials. Current plant augmentation techniques use pre-formed nanomaterials and permeabilizing agents or plant cuttings. A so far unexplored concept is the formation of the functional material, in situ, from precursors small enough to be passively internalized through the roots without harming the plants. Metal-organic frameworks are ideal for in situ synthesis as they are composed of metal ions coordinated with organic ligands and have recently been mineralized around single-celled organisms in mild aqueous conditions...
November 23, 2017: Small
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
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
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
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
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)...
December 2017: Biometals: An International Journal on the Role of Metal Ions in Biology, Biochemistry, and Medicine
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