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heavy metal stress on plant

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https://www.readbyqxmd.com/read/29349740/can-cd-translocation-in-oryza-sativa-l-be-attenuated-by-arbuscular-mycorrhizal-fungi-in-the-presence-of-edta
#1
Xiaochen Huang, Guangnan An, Shishu Zhu, Li Wang, Fang Ma
Arbuscular mycorrhizal (AM) fungi play an important role in plant tolerance of heavy metal contamination. In this study, a pot experiment was conducted to illustrate the effects of the two AM fungi species Funneliformis mosseae (Fm) and Rhizophagus irregularis (Ri) on plant growth of Oryza sativa L. either with or without ethylenediamine tetraacetate (EDTA) addition and during exposure to five Cd concentrations (in the range of 0-5 mg kg-1). The results showed that Fm inoculation achieved greater mycorrhizal colonization and mycorrhizal dependency indexes than Ri inoculation...
January 18, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29329098/effect-of-organic-amendments-on-cadmium-stress-to-pea-a-multivariate-comparison-of-germinating-vs-young-seedlings-and-younger-vs-older-leaves
#2
Saliha Shamshad, Muhammad Shahid, Marina Rafiq, Sana Khalid, Camille Dumat, Muhammad Sabir, Behzad Murtaza, Abu Bakr Umer Farooq, Noor S Shah
Despite significant recent advancement in research, biogeochemical behavior of heavy metals with respect to their applied form is still topical. Moreover, metal toxicity to plants may vary with their stage of development/maturity. Therefore, this study for the first time evaluated the influence of ethylenediaminetetraacetic acid (EDTA) and citric acid (CA) on cadmium (Cd) accumulation and toxicity to germinating and young pea seedlings as well as in younger and older leaves. The experimental setup of current study consisted of two separate studies...
January 9, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29306805/changes-in-mycelia-growth-sporulation-and-virulence-of-phytophthora-capsici-when-challenged-by-heavy-metals-cu2-cr2-and-hg2-under%C3%A2-acid-ph-stress
#3
Peiqing Liu, Mengyao Wei, Jinzhu Zhang, Rongbo Wang, Benjin Li, Qinghe Chen, Qiyong Weng
Phytophthora capsici, an economically devastating oomycete pathogen, causes devastating disease epidemics on a wide range of vegetable plants and pose a grave threat to global vegetables production. Heavy metals and acid pH are newly co-occurring stresses to soil micro-organisms, but what can be expected for mycelia growth and virulence and how they injure the oomycetes (especially P. capsici) remains unknown. Here, the effects of different heavy metals (Cu2+, Cr2+, and Hg2+) on mycelia growth and virulence were investigated at different pHs (4...
January 4, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29280101/effect-of-cd-stress-on-the-bioavailability-of-cd-and-other-mineral-nutrition-elements-in-broad-bean-grown-in-a-loess-subsoil-amended-with-municipal-sludge-compost
#4
Cheng Jin, Zhongren Nan, Houcheng Wang, Xiaolin Li, Jian Zhou, Xun Yao, Pen Jin
Municipal sludge compost (MSC) is commonly used as fertilizer or an amendment in barren soils. However, MSC-borne Cd is of great concern in food safety because of its toxicity. Loess subsoil (LS) is barren and lacks nutrients, but it has a strong ability to absorb and stabilize heavy metals. Hence, LS may be amended with MSC and may reduce the bioavailability of Cd. To simulate the dose effect of the accumulated MSC-borne Cd in amended LS, pot experiments were conducted to study the bioavailability of Cd and other mineral nutrition elements in broad bean (Vicia faba L...
December 26, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29277319/two-mulberry-phytochelatin-synthase-genes-confer-zinc-cadmium-tolerance-and-accumulation-in-transgenic-arabidopsis-and-tobacco
#5
Wei Fan, Qing Guo, ChangYing Liu, Xueqin Liu, Meng Zhang, Dingpei Long, Zhonghuai Xiang, Aichun Zhao
Phytochelatin synthase (PCS) is an enzyme involved in the synthesis of phytochelatins, cysteine-rich peptides which play a key role in heavy metal (HM) detoxification of plants. Mulberry (Morus L.), one of the most ecologically and economically important tree genera, has the potential to remediate HM-contaminated soils. However, genes involved in HM detoxification in Morus, such as the PCS genes, have not been identified and characterized. In this study, we identified two Morus notabilis PCS genes based on a genome-wide analysis of the Morus genome database...
December 22, 2017: Gene
https://www.readbyqxmd.com/read/29275477/measuring-heavy-metal-stress-in-ryegrass-using-helium-cadmium-excitation-based-photoluminescence
#6
Jiemin Cheng, Yan Lv, Yaqin Yu, Xinrui Li, Zihan Sun
As the chemical analysis of heavy metal uptake and toxicity in plants is time-consuming, expensive, and destructive, a simple and reliable method for detecting heavy metal transfer from the soil to plants is thus necessary. We aimed to measure copper (Cu), lead (Pb), and cadmium (Cd) stress in ryegrass in vivo using plant photoluminescence based on a helium (He)-cadmium excitation source (wavelength 325 nm). The soils were combined with Cu, Pb and Cd, respectively. Fifteen ryegrass seedlings (Lolium multiflorum) were planted in each pot...
December 23, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29250721/annotation-and-characterization-of-cd-responsive-metal-transporter-genes-in-rapeseed-brassica-napus
#7
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
https://www.readbyqxmd.com/read/29249026/efficiency-of-biogas-slurry-and-burkholderia-phytofirmans-psjn-to-improve-growth-physiology-and-antioxidant-activity-of-brassica-napus-l-in-chromium-contaminated-soil
#8
Muhammad Nafees, Shafaqat Ali, Muhammad Naveed, Muhammad Rizwan
Contamination of soil is a major problem globally with colligated danger for ecosystem and human health. Chromium (Cr) is a toxic heavy metal and caused harmful effect on growth and development of plants. Phytostabilization reduced the mobility of heavy metals with addition of amendments which can significantly decrease metal solubility in soil. Phytostabilization can be achieved by application of biogas slurry (BGS) and endophytic bacteria as amendments in the contaminated soils. The present study revealed that the Burkholderia phytofirmans PsJN and BGS improved the growth, physiology, and antioxidant activity and reduced Cr uptake under a pot experiment spiked with Cr (20 mg kg-1 soil)...
December 16, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29247887/protective-role-of-exogenous-phytohormones-on-redox-status-in-pea-seedlings-under-copper-stress
#9
Marouane Ben Massoud, Lamia Sakouhi, Inès Karmous, Yao Zhu, Ezzedine El Ferjani, David Sheehan, Abdelilah Chaoui
The present work aims to provide insight on the role of phytohormone application in developing efficient practical defense strategies to improve plants tolerance under heavy metal contamination. For this purpose, pea (Pisum sativum L.) seeds were germinated in an aqueous solution of 200μM CuCl2 up to the 3rd day and then continued to germinate in the presence of distilled water (stress cessation) or were subjected to following combinations: Cu+1μM IAA and Cu+1μM GA3 for 3 additional days. The results showed that copper excess induced oxidative stress in germinating seeds, which resulted in changes of the redox state of glutathione and cysteine, and proteomics revealed Cu-induced modifications of thiols (SH) and carbonyls (CO) (indicators of protein oxidation)...
December 9, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29241123/effects-of-arbuscular-mycorrhizal-inoculation-and-biochar-amendment-on-maize-growth-cadmium-uptake-and-soil-cadmium-speciation-in-cd-contaminated-soil
#10
Ling Liu, Jiwei Li, Feixue Yue, Xinwei Yan, Fayuan Wang, Sean Bloszies, Yanfang Wang
Experiments conducted to understand how arbuscular mycorrhizal (AM) inoculation or biochar application affect plant growth and heavy metal uptake have thus far looked at single applications of either soil amendment. There is little evidence of their synergistic effects, in particular for plants grown in cadmium (Cd) contaminated soil. We conducted a mesocosm experiment to investigate the effect of AM inoculation (Glomus intraradices BEG 141) and/or wheat-straw biochar amendment on maize (Zea mays L. cv. Hongdan No...
December 6, 2017: Chemosphere
https://www.readbyqxmd.com/read/29229911/comparative-genome-analysis-of-the-vineyard-weed-endophyte-pseudomonas-viridiflava-cdrtc14-showing-selective-herbicidal-activity
#11
Abdul Samad, Livio Antonielli, Angela Sessitsch, Stéphane Compant, Friederike Trognitz
Microbes produce a variety of secondary metabolites to be explored for herbicidal activities. We investigated an endophyte Pseudomonas viridiflava CDRTc14, which impacted growth of its host Lepidium draba L., to better understand the possible genetic determinants for herbicidal and host-interaction traits. Inoculation tests with a variety of target plants revealed that CDRTc14 shows plant-specific effects ranging from beneficial to negative. Its herbicidal effect appeared to be dose-dependent and resembled phenotypically the germination arrest factor of Pseudomonas fluorescens WH6...
December 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29228357/surfactant-and-heavy-metal-interaction-in-poplar-a-focus-on-sds-and-zn-uptake
#12
Erika C Pierattini, Alessandra Francini, Andrea Raffaelli, Luca Sebastiani
Surfactants are widely used detergent ingredients and, thanks to their chemical properties, they are applied for remediation of sites polluted by heavy metals and organic contaminants, both in soil flushing and in phytoremediation. However, their direct effects on tree physiology especially in consociation with heavy metal pollution, as well as their possible absorption by plants, have not been appropriately investigated. In order to evaluate plant uptake/translocation of the surfactant sodium dodecyl sulfate (SDS) and the heavy metal zinc (Zn) in Populus alba L...
December 7, 2017: Tree Physiology
https://www.readbyqxmd.com/read/29220736/arsenic-stress-effects-on-root-water-absorption-in-soybean-plants-physiological-and-morphological-aspects
#13
Mariana E Vezza, Analía Llanes, Claudia Travaglia, Elizabeth Agostini, Melina A Talano
Soybean (Glycine max L.) is often cultivated in areas contaminated with arsenic (As), which negatively affects plant growth and reduces crop yield. The deleterious effects may be due, at least in part, to disturbances in the water status, as was reported for some plants exposed to heavy metals. However, to our knowledge, these mechanisms have not been studied in depth in soybean plants exposed to As. The aim of the present work was to analyze possible changes in water relations and the responses developed in soybean plants under arsenate (AsV) and arsenite (AsIII) stress...
December 2, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29214486/metabolism-mediated-induction-of-zinc-tolerance-in-brassica-rapa-by-burkholderia-cepacia-cs2-1
#14
Sang-Mo Kang, Raheem Shahzad, Saqib Bilal, Abdul Latif Khan, Young-Hyun You, Won-Hee Lee, Hee-La Ryu, Ko-Eun Lee, In-Jung Lee
Brassica rapa (Chinese cabbage) is an essential component of traditional Korean food. However, the crop is often subject to zinc (Zn+) toxicity from contaminated irrigation water, which, as a result, compromises plant growth and production, as well as the health of human consumers. The present study investigated the bioaccumulation of Zn+ by Burkholderia cepacia CS2-1 and its effect on the heavy metal tolerance of Chinese cabbage. Strain CS2-1 was identified and characterized on the basis of 16S rRNA sequences and phylogenetic analysis...
December 2017: Journal of Microbiology / the Microbiological Society of Korea
https://www.readbyqxmd.com/read/29201916/biochemical-and-genetical-responses-of-phoenix-dactylifera-l-to-cadmium-stress
#15
Fahad Al-Qurainy, Salim Khan, Mohamed Tarroum, Mohammad Nadeem, Saleh Alansi, Aref Alshameri
The cadmium (Cd), a heavy metal, causes toxicity, which leads to hampering the growth and development of the plant. The molecular and biochemical approaches were used for the investigation of antioxidant system response and genotoxicity in date palm (Phoenix dactylifera L.) cv. Sagai in pot experiment having Cd. The root length was more affected than the shoot length as more accumulation of Cd occurs in roots. Fresh weights of root and shoot were reduced significantly in treated plants as compared to the control...
2017: BioMed Research International
https://www.readbyqxmd.com/read/29177306/remediation-mechanisms-for-cd-contaminated-soil-using-natural-sepiolite-at-the-field-scale
#16
Xiuling Yin, Yingming Xu, Rong Huang, Qingqing Huang, Zhonglei Xie, Yanming Cai, Xuefeng Liang
Remediation of heavy metal polluted agricultural soil is essential for human health and ecological safety and remediation mechanisms at the microscopic level are vital for their large-scale utilization. In this study, natural sepiolite was employed as an immobilization agent for in situ field-scale remediation of Cd-contaminated paddy soil and the remediation mechanisms were investigated in terms of soil chemistry and plant physiology. Natural sepiolite had a significant immobilization effect for bioavailable Cd contents in paddy soil, and consequently could lower the Cd concentrations of brown rice, husk, straw, and roots of rice plants by 54...
November 27, 2017: Environmental Science. Processes & Impacts
https://www.readbyqxmd.com/read/29175636/effects-of-rhizophagus-clarus-and-p-availability-in-the-tolerance-and-physiological-response-of-mucuna-cinereum-to-copper
#17
Paulo Ademar Avelar Ferreira, Tales Tiecher, Tadeu Luis Tiecher, Wesley de Melo Rangel, Claudio Roberto Fonsêca Sousa Soares, Sidnei Deuner, Camila Peligrinotti Tarouco, Admir José Giachini, Fernando Teixeira Nicoloso, Gustavo Brunetto, Mariana Vieira Coronas, Carlos Alberto Ceretta
Arbuscular mycorrhizal fungi (AMF) improve plant ability to uptake P and tolerate heavy metals. This study aimed to evaluate the effect of available P and the inoculation of Rhizophagus clarus in a Cu-contaminated soil (i) on the activity of acid phosphatases (soil and plant), the presence of glomalin, and (ii) in the biochemical and physiological status of Mucuna cinereum. A Typic Hapludalf soil artificially contaminated by adding 60 mg kg-1 Cu was used in a 3 × 2 factorial design with three replicates...
November 21, 2017: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29172132/melatonin-pretreatment-improves-vanadium-stress-tolerance-of-watermelon-seedlings-by-reducing-vanadium-concentration-in-the-leaves-and-regulating-melatonin-biosynthesis-and-antioxidant-related-gene-expression
#18
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...
November 20, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/29163398/phytohormones-and-beneficial-microbes-essential-components-for-plants-to-balance-stress-and-fitness
#19
REVIEW
Dilfuza Egamberdieva, Stephan J Wirth, Abdulaziz A Alqarawi, Elsayed F Abd Allah, Abeer Hashem
Plants are subjected to various abiotic stresses, such as drought, extreme temperature, salinity, and heavy metals. Abiotic stresses have negative impact on the physiology and morphology of plants through defects in the genetic regulation of cellular pathways. Plants employ several tolerance mechanisms and pathways to avert the effects of stresses that are triggered whenever alterations in metabolism are encountered. Phytohormones are among the most important growth regulators; they are known for having a prominent impact on plant metabolism, and additionally, they play a vital role in the stimulation of plant defense response mechanisms against stresses...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29149404/the-translational-controlled-tumour-protein-tctp-biological-functions-and-regulation
#20
Ulrich-Axel Bommer
The Translational Controlled Tumour Protein TCTP (gene symbol TPT1, also called P21, P23, Q23, fortilin or histamine-releasing factor, HRF) is a highly conserved protein present in essentially all eukaryotic organisms and involved in many fundamental cell biological and disease processes. It was first discovered about 35 years ago, and it took an extended period of time for its multiple functions to be revealed, and even today we do not yet fully understand all the details. Having witnessed most of this history, in this chapter, I give a brief overview and review the current knowledge on the structure, biological functions, disease involvements and cellular regulation of this protein...
2017: Results and Problems in Cell Differentiation
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