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heavy metal stress on plant

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https://www.readbyqxmd.com/read/29751225/effects-of-cadmium-and-copper-mixtures-to-carrot-and-pakchoi-under-greenhouse-cultivation-condition
#1
Shengnan Hou, Na Zheng, Lin Tang, Xiaofeng Ji
A pot experiment was undertaken to investigate the effects of Cd and Cu mixtures to growth and nutrients (sugar, carotene or vitamin C) of carrot and pakchoi under greenhouse cultivation condition. The study included: (a) physical-chemical properties of soil and soil animals in response to Cd and Cu stress; (b) bioaccumulation of heavy metals, length, biomass, contents of sugar and carotene (vitamin C) of carrot and pakchoi; (c) estimation the effects of Cd and Cu mixtures by multivariate regression analysis...
May 8, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29750147/beryllium-stress-induced-modifications-in-antioxidant-machinery-and-plant-ultrastructure-in-the-seedlings-of-black-and-yellow-seeded-oilseed-rape
#2
Skhawat Ali, Rong Jin, Rafaqat A Gill, Theodore M Mwamba, Na Zhang, Zaid Ul Hassan, Faisal Islam, Shafaqat Ali, Weijun Zhou
Beryllium (Be) could be a threatening heavy metal pollutant in the agroecosystem that may severely affect the performance of crops. The present study was conducted to evaluate the toxic effects of Be (0, 100, 200, and 400  μ M) on physiological, ultrastructure, and biochemical attributes in hydroponically grown six-day-old seedlings of two cultivars of Brassica napus L., one tolerant (ZS 758, black seeded) and one sensitive (Zheda 622, yellow seeded). Higher Be concentrations reduced the plant growth, biomass production, chlorophyll contents, and the total soluble protein contents...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29738930/silicon-and-its-application-method-effects-on-modulation-of-cadmium-stress-responses-in-triticum-aestivum-l-through-improving-the-antioxidative-defense-system-and-polyamine-gene-expression
#3
Saad M Howladar, Sami A Al-Robai, Fatima S Al-Zahrani, Majed M Howladar, Amal Y Aldhebiani
Identification of the optimum application method of exogenous supports for crop plants to improve their growth under environmental stresses such as heavy metals represents key priorities for researchers worldwide. Influences of different application methods of silicon (Si; 3 mM); soil treatment, foliar spray and seed soaking on growth, chlorophyll fluorescence, photosynthetic gas exchange, cell membrane injury, osmoprotectants contents, antioxidative defense system activity, and polyamines contents and their gene expression in wheat plants grown under normal and 2 mM cadmium (Cd) stress conditions were investigated in 3-repeated pot experiment...
May 4, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29738902/stress-response-of-triticum-aestivum-l-and-brassica-juncea-l-against-heavy-metals-growing-at-distillery-and-tannery-wastewater-contaminated-site
#4
Pankaj Chowdhary, Ashutosh Yadav, R Singh, Ram Chandra, D P Singh, Abhay Raj, Ram Naresh Bharagava
This study aimed to investigate the effects of potentially toxic elements on biochemical parameters in wheat (Triticum aestivum L.) and mustard (Brassica juncea L.) plants growing at distillery and tannery wastewater contaminated sites. The analysis of plants showed the highest accumulation of Fe (361 mg kg-1 in wheat root and 359 mg kg-1 in mustard leaves) followed by Zn, Cr and Mn in leaf>shoot>root. Further, the Chl-a, b, and carotenoids content was also found high in plant samples. Results also showed that photosynthetic content in wheat and mustard growing at tannery wastewater contaminated sites was Chl-a 3...
April 28, 2018: Chemosphere
https://www.readbyqxmd.com/read/29737961/toxicity-assessment-of-cobalt-ferrite-nanoparticles-on-wheat-plants
#5
J López-Luna, M M Camacho-Martínez, F A Solís-Domínguez, M C González-Chávez, R Carrillo-González, S Martinez-Vargas, O F Mijangos-Ricardez, M C Cuevas-Díaz
Cobalt ferrite nanoparticles (NPs) have received increasing attention due to their widespread therapeutic and agricultural applicability. In the environmental field, dry powder- and ferrofluid-suspended cobalt ferrite NPs were found to be useful for removing heavy metals and metalloids from water, while diluted suspensions of cobalt ferrite NP have been promisingly applied in medicine. However, the potential toxicological implications of widespread exposure are still unknown. Since cobalt ferrite NPs are considered residual wastes of environmental or medical applications, plants may serve as a point-of-entry for engineered nanomaterials as a result of consumption of these plants...
May 8, 2018: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/29736625/two-facets-of-world-arsenic-problem-solution-crop-poisoning-restriction-and-enforcement-of-phytoremediation
#6
REVIEW
Monika Kofroňová, Petra Mašková, Helena Lipavská
This review provides insights into As toxicity in plants with focus on photosynthesis and sugar metabolism as important arsenic targets and simultaneously defence tools against accompanying oxidative stress. Heavy metal contamination is a great problem all over the world. Arsenic, a metalloid occurring naturally in the Earth's crust, also massively spreads out in the environment by human activities. Its accumulation in crops poses a severe health risk to humans and animals. Besides the restriction of human-caused contamination, there are two basic ways how to cope with the problem: first, to limit arsenic accumulation in harvestable parts of the crops; second, to make use of some arsenic hyperaccumulating plants for phytoremediation of contaminated soils and waters...
May 7, 2018: Planta
https://www.readbyqxmd.com/read/29729572/the-effects-of-organophosphorus-insecticides-and-heavy-metals-on-dna-damage-and-programmed-cell-death-in-two-plant-models
#7
Josefina Cortés-Eslava, Sandra Gómez-Arroyo, Maria C Risueño, Pilar S Testillano
The ubiquity of pollutants, such as agrochemicals and heavy metals, constitute a serious risk to human health. To evaluate the induction of DNA damage and programmed cell death (PCD), root cells of Allium cepa and Vicia faba were treated with two organophosphate insecticides (OI), fenthion and malathion, and with two heavy metal (HM) salts, nickel nitrate and potassium dichromate. An alkaline variant of the comet assay was performed to identify DNA breaks; the results showed comets in a dose-dependent manner, while higher concentrations induced clouds following exposure to OIs and HMs...
May 2, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29727812/effects-of-cadmium-stress-on-growth-and-amino-acid-metabolism-in-two-compositae-plants
#8
Guangxu Zhu, Huayun Xiao, Qingjun Guo, Zhongyi Zhang, Jingjing Zhao, Dan Yang
Cadmium, a high toxic heavy metal, is one of the most serious contaminants in soil and a potential threat to plant growth and human health. Amino acid metabolism has the central role in heavy metal stress resistance of plants. In this paper, a pot experiment was carried out to study the effects of different concentrations of cadmium (0, 3, 6, 12, 30 mg kg-1 ) on the growth, Cd accumulation and amino acid metabolism in two Compositae plants (Ageratum conyzoides L. and Crassocephalum crepidioides). The results showed that under cadmium stress, C...
May 1, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29715631/silicon-improves-growth-and-alleviates-oxidative-stress-in-rice-seedlings-oryza-sativa-l-by-strengthening-antioxidant-defense-and-enhancing-protein-metabolism-under-arsanilic-acid-exposure
#9
Anjing Geng, Xu Wang, Lishu Wu, Fuhua Wang, Zhichao Wu, Hui Yang, Yan Chen, Dian Wen, Xiangxiang Liu
Organoarsenic arsanilic acid (ASA) contamination of paddy soil is a serious but less concerned hazard to agriculture and health of people consuming rice as staple food, for rice is one major pathway of arsenic (As) exposure to human food. To date little research has studied the effect of ASA on biochemical process of rice. Silicon (Si) application is able to reduce the toxicities of heavy metals in numerous plants, but little information about ASA. This work investigated whether and how Si influenced alleviation of ASA toxicity in rice at biochemical level to have a better understanding of defense mechanism by Si against ASA stress...
April 28, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29696542/comparative-analysis-of-cadmium-induced-stress-responses-by-the-aromatic-and-non-aromatic-rice-genotypes-of-west-bengal
#10
Snehalata Majumdar, Bratati Chakraborty, Rita Kundu
Constant exposure of the living ecosystems to heavy metals, like cadmium (Cd), induces a detectable change at the biochemical and genetic level. Repeated application of phosphate fertilizers in paddy fields, leads to increase in Cd content of soil. Cd being highly mobile is transported to shoot and grain, thereby entering into the food chain of animal system. In the present study, treatment of 7-day old rice seedlings with 10 μM cadmium chloride resulted in Cd toxicity across the seven non-aromatic and six aromatic rice cultivars and landraces used for the study...
April 25, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29688051/physiological-responses-to-cadmium-stress-in-strawberry-treated-with-pomegranate-peel-activated-carbon
#11
Somayeh Naderi, Mahdiyeh Gholami, Bahram Baninasab, Majid Afyuni
Many reports have already been published regarding the removal of heavy metals from aqueous solutions onto activated carbon. However, the biosorbents' effect on the plant response still needs further investigation. In this study, activated carbon derived from the pomegranate peel [pomegranate activated carbons (PAC)] was used to see the effects of the addition of PAC on growing strawberry in Cd-contaminated sand. Cd accumulation and toxicity to strawberry was investigated by measuring the concentration of Cd in plant tissues and various biochemical activities of plant...
May 12, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29681916/heavy-metal-stress-signaling-and-tolerance-due-to-plant-associated-microbes-an-overview
#12
REVIEW
Shalini Tiwari, Charu Lata
Several anthropogenic activities including mining, modern agricultural practices, and industrialization have long-term detrimental effect on our environment. All these factors lead to increase in heavy metal concentration in soil, water, and air. Soil contamination with heavy metals cause several environmental problems and imparts toxic effect on plant as well as animals. In response to these adverse conditions, plants evolve complex molecular and physiological mechanisms for better adaptability, tolerance, and survival...
2018: Frontiers in Plant Science
https://www.readbyqxmd.com/read/29673186/identification-expression-analysis-of-the-hsf-family-and-characterization-of-class-a4-in-sedum-alfredii-hance-under-cadmium-stress
#13
Shuang-Shuang Chen, Jing Jiang, Xiao-Jiao Han, Yun-Xing Zhang, Ren-Ying Zhuo
Sedum alfredii Hance, a cadmium (Cd)/zinc (Zn)/lead (Pb) co-hyperaccumulating species, is a promising phytoremediation candidate because it accumulates substantial amounts of heavy metal ions without showing any obvious signs of poisoning. The heat shock transcription factor (Hsf) family plays crucial roles in plant growth, development, and stress responses. Although the roles of some Hsfs in abiotic stress have been well studied in model plants, the Hsf family has not been systematically investigated in heavy metal hyperaccumulators...
April 17, 2018: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/29670641/genome-wide-identification-and-expression-analysis-of-the-cation-diffusion-facilitator-gene-family-in-turnip-under-diverse-metal-ion-stresses
#14
Xiong Li, Yuansheng Wu, Boqun Li, Wenqi He, Yonghong Yang, Yongping Yang
The cation diffusion facilitator (CDF) family is one of the gene families involved in metal ion uptake and transport in plants, but the understanding of the definite roles and mechanisms of most CDF genes remain limited. In the present study, we identified 18 candidate CDF genes from the turnip genome and named them BrrMTP1.1 - BrrMTP12 . Then, we performed a comparative genomic analysis on the phylogenetic relationships, gene structures and chromosome distributions, conserved domains, and motifs of turnip CDFs...
2018: Frontiers in Genetics
https://www.readbyqxmd.com/read/29666936/assessment-of-toxic-impact-of-metals-on-proline-antioxidant-enzymes-and-biological-characteristics-of-pseudomonas-aeruginosa-inoculated-cicer-arietinum-grown-in-chromium-and-nickel-stressed-sandy-clay-loam-soils
#15
Saima Saif, Mohammad Saghir Khan
Considering the heavy metal risk to soil microbiota and agro-ecosystems, the study was designed to determine metal toxicity to bacteria and to find metal tolerant bacteria carrying multifarious plant growth promoting activities and to assess their impact on chickpea cultivated in stressed soils. Metal tolerant strain SFP1 recognized as Pseudomonas aeruginosa employing 16S rRNA gene sequence determination showed maximum tolerance to Cr (400 μg/ml) and Ni (800 μg/ml) and produced variable amounts of indole acetic acid, HCN, NH3 , and ACC deaminase and could solubilize insoluble phosphates even under Cr (VI) and Ni stress...
April 17, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29665488/antioxidative-enzymes-and-expression-of-rbcl-gene-as-tools-to-monitor-heavy-metal-related-stress-in-plants
#16
Marta Jaskulak, Agnieszka Rorat, Anna Grobelak, Małgorzata Kacprzak
The aim of the study was to evaluate sensitivity and potential applications of selected biomarkers in phytoremediation under complex heavy metal contamination in Sinapis alba L., Robinia pseudoacacia L. and Lupinus luteus L as a potential tools in effective phytoremediation management. The toxicity assessment was conducted using selected measurement endpoints, both classical and advanced, i.e., germination index, roots length, guaiacol peroxidase activity (GPX), chlorophyll and protein content, the amount of total phenolic compounds (TPC) and level of expression of one of the ribulose-bisphosphate carboxylase genes (rbcL)...
April 14, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29662899/chromium-vi-toxicity-in-legume-plants-modulation-effects-of-rhizobial-symbiosis
#17
REVIEW
Uliana Ya Stambulska, Maria M Bayliak, Volodymyr I Lushchak
Most legume species have the ability to establish a symbiotic relationship with soil nitrogen-fixing rhizobacteria that promote plant growth and productivity. There is an increasing evidence of reactive oxygen species (ROS) important role in formation of legume-rhizobium symbiosis and nodule functioning. Environmental pollutants such as chromium compounds can cause damage to rhizobia, legumes, and their symbiosis. In plants, toxic effects of chromium(VI) compounds are associated with the increased production of ROS and oxidative stress development as well as with inhibition of pigment synthesis and modification of virtually all cellular components...
2018: BioMed Research International
https://www.readbyqxmd.com/read/29656355/nacl-impact-on-kosteletzkya-pentacarpos-seedlings-simultaneously-exposed-to-cadmium-and-zinc-toxicities
#18
Ming-Xi Zhou, Hélène Dailly, Marie-Eve Renard, Rui-Ming Han, Stanley Lutts
Data regarding NaCl impact on halophyte plant species exposed to a polymetallic contamination remain scarce. Seedlings of the salt marsh species Kosteletzkya pentacarpos were simultaneously exposed to cadmium (10 μM) and zinc (100 μM) in the absence or presence of 50 mM NaCl. Heavy metal exposure reduced plant growth and increased Cd and Zn concentrations in all organs. Cd and Zn accumulation reduced net photosynthesis in relation to stomatal closure, decreased in chlorophyll concentration and alteration in chlorophyll fluorescence-related parameters...
April 14, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29627928/toxic-effects-of-coal-fly-ash-on-wheat-seedlings
#19
Zhongbin Liao, Xin Xiao, Yingying Hu, Xiaofei Sun, Hui Wang, Hongxuan Zhou, Yu Ma, James Li
We studied heavy metal (HM) stress on wheat seedlings (AK-58) with and without coal fly ash (CFA) exposure. Three CFA spray rates were used to simulate air quality of the second level. Results show airborne particulates can directly enter plant leaves, affecting the whole plant. HM deposition decreases seedling size and mass and reduces activities of the chlorophyll family, photosynthesis enzymes (RuBP and PEPC), and photosynthesis efficiency. In leaves, HM deposition increases with the CFA spray rate. In roots, however, CFA exposure seems to reduce HM deposition, compared with the control without CFA exposure...
April 7, 2018: Environmental Geochemistry and Health
https://www.readbyqxmd.com/read/29626640/differential-responses-to-cd-stress-induced-by-exogenous-application-of-cu-zn-or-ca-in-the-medicinal-plant-catharanthus-roseus
#20
Qi Chen, Xueyan Lu, Xiaorui Guo, Yajie Pan, Bofan Yu, Zhonghua Tang, Qingxi Guo
Cd(II) is one of the most widespread and toxic heavy metals and seriously threatens plant growth, furthermore negatively affecting human health. For survival from this metal stress, plants always fight with Cd(II) toxicity by themselves or using other external factors. The effects of second metals copper (Cu(II)), zinc (Zn(II)) and calcium (Ca(II)) on the Cd(II)-affected root morphology, Cd(II) translocation and metabolic responses in Catharanthus roseus were investigated under hydroponic conditions. We found that the Cd-stressed plants displayed the browning and rot root symptom, excess H2 O2 content, lipid peroxidation and Cd(II) accumulation in plants...
April 4, 2018: Ecotoxicology and Environmental Safety
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