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Metal transporter plant

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https://www.readbyqxmd.com/read/29132718/bioturbation-effects-on-bioaccumulation-of-cadmium-in-the-wetland-plant-typha-latifolia-a-nature-based-experiment
#1
Trung Kien Hoang, Anne Probst, Didier Orange, Franck Gilbert, Arnaud Elger, Jean Kallerhoff, François Laurent, Sabina Bassil, Thi Thuy Duong, Magali Gerino
The development of efficient bioremediation techniques to reduce aquatic pollutant load in natural sediment is one of the current challenges in ecological engineering. A nature-based solution for metal bioremediation is proposed through a combination of bioturbation and phytoremediation processes in experimental indoor microcosms. The invertebrates Tubifex tubifex (Oligochaeta Tubificidae) was used as an active ecological engineer for bioturbation enhancement. The riparian plant species Typha latifolia was selected for its efficiency in phyto-accumulating pollutants from sediment...
November 10, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29121354/exogenous-glutathione-enhances-cadmium-accumulation-and-alleviates-its-toxicity-in-populus-%C3%A3-canescens
#2
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/29110513/ankaferd-influences-mrna-expression-of-iron-regulated-genes-during-iron-deficiency-anemia
#3
Afife Gulec, Sukru Gulec
Ankaferd Blood Stopper (ABS) comprises a mixture of plants and stops bleeding via forming a protein network by erythroid aggregation. Bleeding causes reduction of iron levels in body. It has been indicated that ABS contains significant amount of iron. Thus, we investigated the biological activity of ABS-derived iron on iron-regulated genes during iron-deficiency anemia (IDA). IDA We selected Caco-2 and HepG2 cell lines as in vitro models of human intestine and liver, respectively. Iron deficiency anemia was induced by deferoxamine...
January 1, 2017: Clinical and Applied Thrombosis/hemostasis
https://www.readbyqxmd.com/read/29089547/knockout-of-osnramp5-using-the-crispr-cas9-system-produces-low-cd-accumulating-indica-rice-without-compromising-yield
#4
Li Tang, Bigang Mao, Yaokui Li, Qiming Lv, LiPing Zhang, Caiyan Chen, Hanjie He, Weiping Wang, Xiongfeng Zeng, Ye Shao, Yinlin Pan, Yuanyi Hu, Yan Peng, Xiqin Fu, Hongqing Li, Shitou Xia, Bingran Zhao
Rice grain with excessive cadmium (Cd) is a major source of dietary Cd intake and a serious threat to health for people who consume rice as a staple food. The development of elite rice cultivars with consistently low Cd content is challenging for conventional breeding approaches, and new strategies urgently need to be developed. Here, we report the development of new indica rice lines with low Cd accumulation and no transgenes by knocking out the metal transporter gene OsNramp5 using CRISPR/Cas9 system. Hydroponic culture showed that Cd concentrations in shoots and roots of osnramp5 mutants were dramatically decreased, resulting in rescue of impaired growth in high Cd condition...
October 31, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29089035/transcriptional-analysis-of-sweet-orange-trees-co-infected-with-candidatus-liberibacter-asiaticus-and-mild-or-severe-strains-of-citrus-tristeza-virus
#5
Shimin Fu, Jonathan Shao, Cristina Paul, Changyong Zhou, John S Hartung
BACKGROUND: Citrus worldwide is threatened by huanglongbing (HLB) and tristeza diseases caused by 'Candidatus Liberibacter asiaticus' (CaLas) and Citrus tristeza virus (CTV). Although the pathogens are members of the α-proteobacteria and Closteroviridae, respectively, both are restricted to phloem cells in infected citrus and are transmitted by insect vectors. The response of sweet orange to single infection by either of these two pathogens has been characterized previously by global gene expression analysis...
October 31, 2017: BMC Genomics
https://www.readbyqxmd.com/read/29054646/heavy-metal-accumulation-and-health-risk-assessment-in-soil-wheat-system-under-different-nitrogen-levels
#6
Yang Zhang, Changbin Yin, Suzhen Cao, Leilei Cheng, Guosheng Wu, Jianbiao Guo
Heavy metal(loid)s (HMs) in organic fertilizer have become a primary source of HMs pollution of farmlands, which could cause deleterious health effects in people exposed through soil-plant systems via multi-pathways. This study investigated China's main grain production area (Henan Province) to evaluate the accumulation and transport characteristics of HMs (Cr, Mn, Ni, Cu, Zn, As, Cd and Pb) in a soil-wheat system and conduct a health risk assessment for wheat (Triticum aestivum) grain under different nitrogenous fertilizer treatments...
October 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/29048564/phytosiderophores-determine-thresholds-for-iron-and-zinc-accumulation-in-biofortified-rice-endosperm-while-inhibiting-the-accumulation-of-cadmium
#7
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/29043483/iron-toxicity-in-yeast-transcriptional-regulation-of-the-vacuolar-iron-importer-ccc1
#8
REVIEW
Liangtao Li, Diane M Ward
All eukaryotes require the transition metal, iron, a redox active element that is an essential cofactor in many metabolic pathways, as well as an oxygen carrier. Iron can also react to generate oxygen radicals such as hydroxyl radicals and superoxide anions, which are highly toxic to cells. Therefore, organisms have developed intricate mechanisms to acquire iron as well as to protect themselves from the toxic effects of excess iron. In fungi and plants, iron is stored in the vacuole as a protective mechanism against iron toxicity...
October 17, 2017: Current Genetics
https://www.readbyqxmd.com/read/29042608/sedum-alfredii-sanramp6-metal-transporter-contributes-to-cadmium-accumulation-in-transgenic-arabidopsis-thaliana
#9
Shuangshuang Chen, Xiaojiao Han, Jie Fang, Zhuchou Lu, Wenmin Qiu, Mingying Liu, Jian Sang, Jing Jiang, Renying Zhuo
The plant natural resistance-associated macrophage protein (Nramp) family plays an important role in tolerance to heavy metal stress. However, few Nramps have been functionally characterized in the heavy metal-accumulating plant Sedum alfredii. Here, Nramp6 was cloned and identified from S. alfredii and its function analyzed in transgenic Arabidopsis thaliana. SaNramp6 cDNA contains an open reading frame of 1, 638 bp encoding 545 amino acids. SaNramp6's expression can be induced by cadmium (Cd) stress, and, after treatment, it peaked at one week and 12 h in the roots and leaves, respectively...
October 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29034141/commercial-phenoxyacetic-herbicides-control-heavy-metal-uptake-by-wheat-in-a-divergent-way-than-pure-active-substances-alone
#10
Elżbieta Skiba, Wojciech M Wolf
BACKGROUND: Impact of two widely used commercial herbicides, i.e. Aminopielik D 450 SL and Chwastox 300 SL, on the uptake and translocation of selected heavy metals in wheat plants Triticum aestivum L. cultivated in the laboratory pot experiments was investigated. Mineral-humus, loamy sand soil representative for the central part of Poland was applied. Bioavailable, exchangeable and total forms of Cd, Co, Cu, Zn, Pb, and Mn were determined. Transfer coefficients, translocation, and bioaccumulation factors illustrating metal migration in the plant were investigated...
2017: Environmental Sciences Europe
https://www.readbyqxmd.com/read/29028613/divergent-biology-of-facultative-heavy-metal-plants
#11
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/29016913/phytochelatin-synthase-has-contrasting-effects-on-cadmium-and-arsenic-accumulation-in-rice-grains
#12
Shimpei Uraguchi, Nobuhiro Tanaka, Christian Hofmann, Kaho Abiko, Naoko Ohkama-Ohtsu, Michael Weber, Takehiro Kamiya, Yuka Sone, Ryosuke Nakamura, Yasukazu Takanezawa, Masako Kiyono, Toru Fujiwara, Stephan Clemens
Phytochelatin (PC) synthesis has been well demonstrated as a major metal tolerance mechanism in Arabidopsis thaliana, whereas its contribution to long-distance element transport especially in monocots remains elusive. Using rice as a cereal model, we examined physiological roles of OsPCS1 in the distribution and detoxification of arsenic (As) and cadmium (Cd), two toxic elements associated with major food safety concerns. First, we isolated four different transcript variants of OsPCS1 as well as one from OsPCS2...
August 14, 2017: Plant & Cell 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
#13
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/28981520/ahirt1-and-ahnramp1-metal-transporter-expression-correlates-with-cd-uptake-in-peanuts-under-iron-deficiency
#14
Chu Chen, Shenglan Xia, Rubo Deng, Caifeng Liu, Gangrong Shi
Fe deficiency may increase Cd accumulation in peanuts. However, the mechanisms are not yet fully understood. In the present study, two contrasting peanut cultivars, Luhua 8 (low seed-Cd cultivar) and Zhenghong 3 (high seed-Cd cultivar) were used to investigate the effect of Fe deficiency on the uptake and accumulation of cadmium (Cd) by hydroponic experiments. Under Fe-sufficient conditions, compared with Luhua 8, Zhenghong 3 had higher specific root length (SRL) and proportion of fine roots with a lower Km for Cd and showed slightly higher expression of AhIRT1 and AhNRAMP1 in the roots...
2017: PloS One
https://www.readbyqxmd.com/read/28968939/methane-alleviates-alfalfa-cadmium-toxicity-via-decreasing-cadmium-accumulation-and-reestablishing-glutathione-homeostasis
#15
Quan Gu, Ziping Chen, Weiti Cui, Yihua Zhang, Huali Hu, Xiuli Yu, Qingya Wang, Wenbiao Shen
Although methane (CH4) generation triggered by some environmental stimuli, displays the protective response against oxidative stress in plants, whether and how CH4 regulates plant tolerance against cadmium stress is largely unknown. Here, we discovered that cadmium (Cd) stimulated the production of CH4 in alfalfa root tissues. The pretreatment with exogenous CH4 could alleviate seedling growth inhibition. Less amounts of Cd accumulation was also observed. Consistently, in comparison with Cd stress alone, miR159 transcript was down-regulated by CH4, and expression levels of its target gene ABC transporter was increased...
January 2018: Ecotoxicology and Environmental Safety
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
#16
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/28932199/bacillus-a-biological-tool-for-crop-improvement-through-bio-molecular-changes-in-adverse-environments
#17
REVIEW
Ramalingam Radhakrishnan, Abeer Hashem, Elsayed F Abd Allah
Crop productivity is affected by environmental and genetic factors. Microbes that are beneficial to plants are used to enhance the crop yield and are alternatives to chemical fertilizers and pesticides. Pseudomonas and Bacillus species are the predominant plant growth-promoting bacteria. The spore-forming ability of Bacillus is distinguished from that of Pseudomonas. Members of this genus also survive for a long time under unfavorable environmental conditions. Bacillus spp. secrete several metabolites that trigger plant growth and prevent pathogen infection...
2017: Frontiers in Physiology
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
#18
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/28900233/copt2-a-plasma-membrane-located-copper-transporter-is-involved-in-the-uptake-of-au-in-arabidopsis
#19
Manish Tiwari, Perumal Venkatachalam, Lola Penarrubia, Shivendra V Sahi
The mechanism of gold nanoparticle formation and genes involved in such processes, especially Au transport in plants are not understood. Previous reports pointed to the probable role of COPT2 in Au transport based on the transcript accumulation of COPT2 under Au exposure. Here, we provide evidence revealing the additional role of COPT2 for Au mobilization in yeast and Arabidopsis. The COPT2 transcripts significantly accumulated in the root of Arabidopsis under Au exposure. The expression of COPT2 restores Cu uptake ability in ctr1Δctr3Δ mutants and leads to Au sensitivity in yeast, which is comparable to Cu in growth kinetics experiments...
September 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28894921/structural-and-functional-variability-in-root-associated-bacterial-microbiomes-of-cd-zn-hyperaccumulator-sedum-alfredii
#20
Jipeng Luo, Qi Tao, Keren Wu, Jinxing Li, Jie Qian, Yongchao Liang, Xiaoe Yang, Tingqiang Li
Interactions between roots and microbes affect plant's resistance to abiotic stress. However, the structural and functional variation of root-associated microbiomes and their effects on metal accumulation in hyperaccumulators remain poorly understood. Here, we characterize the root-associated microbiota of a hyperaccumulating (HP) and a non-hyperaccumulating (NHP) genotype of Sedum alfredii by 16S ribosomal RNA gene profiling. We show that distinct microbiomes are observed in four spatially separable compartments: the bulk soil, rhizosphere, rhizoplane, and endosphere...
November 2017: Applied Microbiology and Biotechnology
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