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Zinc transporter plant

Mahipal Singh Kesawat, Dong Kyun Kim, Naheed Zeba, Mi Chung Suh, Xinli Xia, Choo Bong Hong
Advances in molecular biology have improved crops through transferring genes from one organism to new hosts, and these efforts have raised concerns about potential unexpected outcomes. Here, we provide evidence that a gene with a specific function in one organism can yield completely different effects in a new host. CaRZFP1 is a C3HC4-type RING zinc finger protein gene previously isolated from a cDNA library for heat-stressed hot pepper. In our previous work investigating in vivo CaRZFP1 function, we transferred CaRZFP1 into tobacco; transgenic tobacco exhibited enhanced growth and tolerance to abiotic stresses...
2018: Molecular Breeding: New Strategies in Plant Improvement
Paulo Izquierdo, Carolina Astudillo, Matthew W Blair, Asif M Iqbal, Bodo Raatz, Karen A Cichy
Twelve meta-QTL for seed Fe and Zn concentration and/or content were identified from 87 QTL originating from seven population grown in sixteen field trials. These meta-QTL include 2 specific to iron, 2 specific to zinc and 8 that co-localize for iron and zinc concentrations and/or content. Common bean (Phaseolus vulgaris L.) is the most important legume for human consumption worldwide and it is an important source of microelements, especially iron and zinc. Bean biofortification breeding programs develop new varieties with high levels of Fe and Zn targeted for countries with human micronutrient deficiencies...
May 11, 2018: TAG. Theoretical and Applied Genetics. Theoretische und Angewandte Genetik
Most Amena Khatun, Md Monayem Hossain, Md Azizul Bari, Kafi Md Abdullahil, Md Sarwar Parvez, Md Firoz Alam, Ahmad Humayan Kabir
Zinc (Zn) is an essential micronutrient for the growth and development of plants. However, Zn deficiency is a common abiotic stress causing yield loss in crop plants. This study elucidates the mechanisms of Zn deficiency tolerance in maize through physiological and molecular techniques. Zn deficiency caused no significant effect on root parameters compared with control plants in PAC (tolerant line) and DAC (sensitive line) but showed a substantial reduction in shoot parameters in DAC. In addition, Atomic Absorption Spectroscopy (AAS) analysis showed a significant decrease in Zn concentrations in both roots and shoots of DAC (sensitive) but not in PAC (tolerant) under Zn deficiency, implying that Zn-deficiency tolerance mechanisms exist in PAC...
May 2, 2018: Plant Biology
Xian Duo Zhang, Kai Xuan Zhao, Zhi Min Yang
The plant ATP binding cassette (ABC) transporters are one of the integral membrane proteins responsible for uptake and allocation of a wide range of metabolites and xenobiotics including heavy metals (e.g. zinc, manganese and cadmium). They play multiple roles in plant growth, development and environmental stress responses. Although the ABC transporters have been identified in model plants such as Arabidopsis and rice, they are have not been annotated and identified in rapeseed (Brassica napus) and also, little is known about functionality of these metal transporters...
April 27, 2018: Gene
Ying Li, Jiewen Luo, Jiaoda Yu, Lidan Xia, Chuifan Zhou, Liping Cai, Xiangqing Ma
Slow plant growth, low biomass, and low bioavailability of heavy metals in soil are important factors that limit remediation efficiencies. This study adopted a pot cultivation method to evaluate the phytoremediation efficiency of Neyraudia reynaudiana, planted in contaminated soil from a lead-zinc mining area. The soil was inoculated with earthworms (Eisenia fetida), and mixed with the chelating agent ethylenediaminetetraacetic acid (EDTA) one month after planting. The addition of earthworms significantly increased the aboveground biomass of N...
April 23, 2018: Scientific Reports
Felipe K Ricachenevsky, Artur T de Araújo Junior, Janette P Fett, Raul A Sperotto
Plant nutrient uptake is performed mostly by roots, which have to acquire nutrients while avoiding excessive amounts of essential and toxic elements. Apoplastic barriers such as the casparian strip and suberin deposition block free diffusion from the rhizosphere into the xylem, making selective plasma membrane transporters able to control elemental influx into the root symplast, efflux into the xylem and therefore shoot translocation. Additionally, transporters localized to the tonoplast of root cells have been demonstrated to regulate the shoot ionome, and may be important for seed elemental translocation...
2018: Frontiers in Plant Science
Fenella Steyfkens, Zhiqiang Zhang, Griet Van Zeebroeck, Johan M Thevelein
The nutrient composition of the medium has dramatic effects on many cellular properties in the yeast Saccharomyces cerevisiae . In addition to the well-known specific responses to starvation for an essential nutrient, like nitrogen or phosphate, the presence of fermentable sugar or a respirative carbon source leads to predominance of fermentation or respiration, respectively. Fermenting and respiring cells also show strong differences in other properties, like storage carbohydrate levels, general stress tolerance and cellular growth rate...
2018: Frontiers in Pharmacology
Haitao Shi, Shengmin Zhang, Daozhe Lin, Yunxie Wei, Yu Yan, Guoyin Liu, Russel J Reiter, Zhulong Chan
Although accumulating evidence demonstrates the crosstalk between melatonin and auxin as derivatives of tryptophan, the underlying signaling events remain unclear. In this study, we found that melatonin and auxin mediated the transcriptional levels of zinc finger of Arabidopsis thaliana (ZAT6) in a mutually antagonistic manner. ZAT6 negatively modulated the endogenous auxin level, and ZAT6 knockdown plants were less sensitive to melatonin-regulated auxin biosynthesis, indicating its involvement in melatonin-mediated auxin accumulation...
April 1, 2018: Journal of Pineal Research
Ting-Ying Wu, Wilhelm Gruissem, Navreet K Bhullar
Iron deficiency affects one third of the world population. Most iron biofortification strategies have focused on genes involved in iron uptake and storage but facilitating internal long-distance iron translocation has been understudied for increasing grain iron concentrations. Citrate is a primary iron chelator, and the transporter FERRIC REDUCTASE DEFECTIVE 3 (FRD3) loads citrate into the xylem. We have expressed AtFRD3 in combination with AtNAS1 (NICOTIANAMINE SYNTHASE 1) and PvFER (FERRITIN) or with PvFER alone to facilitate long-distance iron transport together with efficient iron uptake and storage in the rice endosperm...
May 2018: Plant Science: An International Journal of Experimental Plant Biology
Guillaume Dubeaux, Julie Neveu, Enric Zelazny, Grégory Vert
Plant roots forage the soil for iron, the concentration of which can be dramatically lower than those needed for growth. Soil iron uptake uses the broad metal spectrum IRT1 transporter that also transports zinc, manganese, cobalt, and cadmium. Sophisticated iron-dependent transcriptional regulatory mechanisms allow plants to tightly control the abundance of IRT1, ensuring optimal absorption of iron. Here, we uncover that IRT1 acts as a transporter and receptor (transceptor), directly sensing excess of its non-iron metal substrates in the cytoplasm, to regulate its own degradation...
March 15, 2018: Molecular Cell
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 remain poorly understood. Here, we report a discovery of a molecular pathway that controls phosphate (Pi) accumulation in plants under 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...
April 30, 2018: Ecotoxicology and Environmental Safety
Eric T Christenson, Austin S Gallegos, Anirban Banerjee
Iron is universally important to cellular metabolism, and mitoferrin-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...
March 9, 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
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