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https://www.readbyqxmd.com/read/29931614/distribution-of-cd-and-other-cations-between-the-stroma-and-thylakoids-a-quantitative-approach-to-the-search-for-cd-targets-in-chloroplasts
#1
Eugene A Lysenko, Alexander A Klaus, Alexander V Kartashov, Victor V Kusnetsov
Plant growth and photosynthetic activity are usually inhibited due to the overall action of Cd on a whole organism, though few cadmium cations can invade chloroplasts in vivo. We found that in vivo, the major portion of Cd in barley chloroplasts is located in the thylakoids (80%), and the minor portion is in the stroma (20%). Therefore, the electron-transport chain in the thylakoids would be the likely target for direct Cd action in vivo. In vitro, we found the distribution of Cd to be shifted to the stroma (40-60%)...
June 21, 2018: Photosynthesis Research
https://www.readbyqxmd.com/read/29929129/root-iron-plaque-alleviates-cadmium-toxicity-to-rice-oryza-sativa-seedlings
#2
Youqiang Fu, Xujian Yang, Hong Shen
Iron plaque (IP) on root surface can enhance the tolerance of plants to environmental stresses. However, it remains unclear the impact of Fe2+ on cadmium (Cd) toxicity to rice (Oryza sativa) seedlings. In this study, the effects of different Fe2+ and Cd2+ concentration combinations on rice growth were examined hydroponically. Results indicated that Fe2+ concentration up to 3.2 mM did not damage rice roots while induced IP formation obviously. Cd2+ of 10 μM repressed rice growth significantly, while the addition of 0...
June 18, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29925586/microrna166-modulates-cadmium-tolerance-and-accumulation-in-rice
#3
Yanfei Ding, Shaohua Gong, Yi Wang, Feijuan Wang, Hexigeduleng Bao, Junwei Sun, Chong Cai, Keke Yi, Zhixiang Chen, Cheng Zhu
MicroRNAs (miRNAs) are 20- to 24-nucleotide small non-coding RNAs that regulate gene expression in eukaryotic organisms. Several plant miRNAs, such as miR166, have vital roles in plant growth, development and responses to environmental stresses. One such environmental stress encountered by crop plants is exposure to cadmium (Cd), an element highly toxic to most organisms, including humans and plants. In this study, we analyzed the role of miR166 in Cd accumulation and tolerance in rice (Oryza sativa). The expression levels of miR166 in both root and leaf tissues were significantly higher in the reproductive stage than in the seedling stage in rice...
June 20, 2018: Plant Physiology
https://www.readbyqxmd.com/read/29913567/long-term-insight-into-biodiversity-of-a-smelter-wasteland-reclaimed-with-biosolids-and-by-product-lime
#4
Sylwia Siebielec, Grzegorz Siebielec, Tomasz Stuczyński, Piotr Sugier, Emilia Grzęda, Jarosław Grządziel
Smelter wastelands containing high amounts of zinc, lead, cadmium, and arsenic constitute a major problem worldwide. Serious hazards for human health and ecosystem functioning are related to a lack of vegetative cover, causing fugitive dust fluxes, runoff and leaching of metals, affecting post-industrial ecosystems, often in heavily populated areas. Previous studies demonstrated the short term effectiveness of assisted phytostabilisation of zinc and lead smelter slags, using biosolids and liming. However, a long term persistence of plant communities introduced for remediation and risk reduction has not been adequately evaluated...
September 15, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29909534/differences-of-cd-uptake-and-expression-of-oas-and-irt-genes-in-two-varieties-of-ryegrasses
#5
Sunlin Chi, Yuli Qin, Weihong Xu, Yourong Chai, Deyu Feng, Yanhua Li, Tao Li, Mei Yang, Zhangmi He
Pot experiment was conducted to study the difference of cadmium uptake and OAS and IRT genes' expression between the two ryegrass varieties under cadmium stress. The results showed that with the increase of cadmium levels, the dry weights of roots of the two ryegrass varieties, and the dry weights of shoots and plants of Abbott first increased and then decreased. When exposed to 75 mg kg-1 Cd, the dry weights of shoot and plant of Abbott reached the maximum, which increased by 11.13 and 10.67% compared with the control...
June 16, 2018: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29909097/physiological-responses-of-suaeda-glauca-and-arabidopsis-thaliana-in-phytoremediation-of-heavy-metals
#6
Xu Zhang, Min Li, Huanhuan Yang, Xinxin Li, Zhaojie Cui
The over discharge of mine tailing cause consequent heavy metal pollution. Phytoremediation as one of the most viable and efficient method for this problem has aroused much attention. In this research, the growth and physiological responses of Suaeda glauca and Arabidopsis thaliana plants were investigated, and the soil conditions (pH and enzyme activity) were evaluated further under varied levels of cadmium (Cd), lead (Pb) and manganese (Mn). The results showed that heavy metals could inhibit the growth of plants...
June 13, 2018: Journal of Environmental Management
https://www.readbyqxmd.com/read/29908008/long-term-cadmium-exposure-influences-the-abundance-of-proteins-that-impact-the-cell-wall-structure-in-medicago-sativa-stems
#7
Annelie Gutsch, Els Keunen, Gea Guerriero, Jenny Renaut, Ann Cuypers, Jean-François Hausman, Kjell Sergeant
Cadmium (Cd) is a non-essential, toxic heavy metal that poses serious threats to both the ecosystem and the health of humans. Plants employ various cellular and molecular mechanisms to minimize the impact of Cd toxicity and the cell walls function as defensive barrier during Cd exposure. In this study, we adopted a quantitative gel-based proteomic approach (two-dimensional difference gel electrophoresis) to investigate changes in the abundance of cell wall- and soluble proteins in stems of Medicago sativa L...
June 15, 2018: Plant Biology
https://www.readbyqxmd.com/read/29902991/genome-wide-analysis-of-long-non-coding-rnas-affecting-roots-development-at-an-early-stage-in-the-rice-response-to-cadmium-stress
#8
Liang Chen, Shilai Shi, Ninfei Jiang, Hira Khanzada, Ghulam Mustafa Wassan, Changlan Zhu, Xiaosong Peng, Jie Xu, Yujin Chen, Qiuying Yu, Xiaopeng He, Junru Fu, Xiaorong Chen, Lifang Hu, Linjuan Ouyang, Xiaotang Sun, Haohua He, Jianmin Bian
BACKGROUND: Long non-coding RNAs (lncRNAs) have been found to play a vital role in several gene regulatory networks involved in the various biological processes in plants related to stress response. However, systematic analyses of lncRNAs expressed in rice Cadmium (Cd) stress are seldom studied. Thus, we presented the characterization and expression of lncRNAs in rice root development at an early stage in response to Cd stress. RESULTS: The lncRNA deep sequencing revealed differentially expressed lncRNAs among Cd stress and normal condition...
June 15, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29898105/changes-in-the-phenylalanine-ammonia-lyase-activity-total-phenolic-compounds-and-flavonoids-in-prosopis-glandulosa-treated-with-cadmium-and-copper
#9
Daniel González-Mendoza, Rosalba Troncoso-Rojas, Tania Gonzalez-Soto, Onecimo Grimaldo-Juarez, Carlos Ceceña-Duran, Dagoberto Duran-Hernandez, Federico Gutierrez-Miceli
The aim of the present work is to evaluate the changes on the phenylalanine ammonia lyase (PAL) activity, phenolic compounds accumulation and photochemical efficiency in leaves of P. glandulosa treated with Cd2+ (0.001 M) and Cu2+ (0.52 M) concentrations for 96 h under hydroponic conditions. The results showed that only leaves treated with copper had a decrease in photochemical efficiency and leaf epidermal polyphenols in P. glandulosa leaves after 96 h of exposure. On the other hand the reverse-phase HPLC analysis revealed higher levels of phenolic compound (gallic, vanillic and caffeic acids) and flavonoids (rutin and kaempferol-3-O-glucosides) in plant leaves from Cu and Cd-treatments with respect to control plants...
April 2018: Anais da Academia Brasileira de Ciências
https://www.readbyqxmd.com/read/29890434/indole-3-butyric-acid-mediates-antioxidative-defense-systems-to-promote-adventitious-rooting-in-mung-bean-seedlings-under-cadmium-and-drought-stresses
#10
Shi-Weng Li, Xiao-Ying Zeng, Yan Leng, Lin Feng, Xiao-Hu Kang
In vitro experiments were performed to determine whether auxin can mediate the formation of adventitious roots in response to heavy metal and drought stresses using a model rooting plant, mung bean [Vigna radiata (L.) Wilczek]. The treatments with CdCl2 or mannitol alone significantly inhibited the formation and growth of adventitious roots in mung bean seedlings. In contrast, when CdCl2 or mannitol was applied together with indole-3-butyric acid (IBA), IBA considerably cancelled the inhibition of adventitious rooting by stresses...
June 8, 2018: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/29886966/tolerance-and-bioaccumulation-of-combined-copper-zinc-and-cadmium-in-sesuvium-portulacastrum
#11
Jianxiang Feng, Yanyan Lin, Yao Yang, Qianqian Shen, Jianrong Huang, Shugong Wang, Xiaoshan Zhu, Zufu Li
Sesuvium portulacastrum was treated with mixture of copper, zinc, and cadmium for 60 days, with the concentration of each metal ranging from 0 to 20 mg/L. The tolerance of plants and bioaccumulation of heavy metals were then investigated. The height of S. portulacastrum decreased significantly with increasing heavy metal concentrations from 1 to 20 mg/L. The biomass was adversely impacted when the concentration exceeded 5 mg/L. There were no significant differences in malondialdehyde (MDA) concentration among different treatment groups, while the soluble protein content and superoxide dismutase (SOD) activity decreased with increasing heavy metal concentration...
June 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29886928/short-term-cadmium-exposure-induces-gas-exchanges-morphological-and-ultrastructural-disturbances-in-mangrove-avicennia-schaueriana-young-plants
#12
Janaina S Garcia, Ândrea C Dalmolin, Priscila A Cortez, Paulo S Barbeira, Pedro A O Mangabeira, Marcel G C França
Mangroves have been subject to more metal contamination, including cadmium (Cd). This study evaluated if a relatively short Cd exposure may induce metabolic, morphological and ultrastructural cell disturbance in Avicennia schaueriana. Cd induced evident constraints to seedlings since there was reduction in leaf gas exchanges and the plants did not survive for more than 10 days at a higher Cd exposure in controlled conditions. The highest Cd accumulation was observed in roots and gradually less in stem and leaves...
June 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29886381/effects-of-arbuscular-mycorrhizal-symbiosis-on-growth-nutrient-and-metal-uptake-by-maize-seedlings-zea-mays-l-grown-in-soils-spiked-with-lanthanum-and-cadmium
#13
Qing Chang, Feng-Wei Diao, Qi-Fan Wang, Liang Pan, Zhen-Hua Dang, Wei Guo
Multiple contaminants can affect plant-microbial remediation processes because of their interactive effects on environmental behaviour, bioavailability and plant growth. Recent studies have suggested that arbuscular mycorrhizal fungi (AMF) can facilitate the revegetation of soils co-contaminated with rare earth elements (REEs) and heavy metals. However, little is known regarding the role of AMF in the interaction of REEs and heavy metals. A pot experiment was conducted to evaluate the effects of Claroideoglomus etunicatum on the biomass, nutrient uptake, metal uptake and translocation of maize grown in soils spiked with Lanthanum (La) and Cadmium (Cd)...
June 4, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29885626/alleviation-of-cadmium-cd-toxicity-and-minimizing-its-uptake-in-wheat-triticum-aestivum-by-using-organic-carbon-sources-in-cd-spiked-soil
#14
Muhammad Zia Ur Rehman, Muhammad Rizwan, Amjad Hussain, Muhammad Saqib, Shafaqat Ali, Muhammad Irfan Sohail, Mahnoor Shafiq, Farhan Hafeez
Cadmium (Cd)-contamination of agricultural soils has been receiving attention worldwide due to its entry into food crops such as wheat (Triticum aestivum L.). Little is known regarding the use of organic carbon (OC) sources in alleviating Cd toxicity in cereals. The current experiment was aimed to study the effects of different OC sources on the Cd accumulation by wheat. A pot study was conducted to determine the effects of rice husk biochar (RHB), farmyard manure (FYM), and lignite (LT) either alone or in combination on crop growth, Cd bioavailability and health risk assessment...
June 6, 2018: Environmental Pollution
https://www.readbyqxmd.com/read/29885509/cbf-dreb-transcription-factor-genes-play-role-in-cadmium-tolerance-and-phytoaccumulation-in-ricinus-communis-under-molybdenum-treatments
#15
Nasir Ali, Fazal Hadi
The C-repeat binding factor/dehydration responsive element binding proteins (CBF/DREB) constitute a large group of transcriptional factors. Their role in abiotic stresses such as drought, salinity and low temperature tolerance in plants have been well established, while little information about their role in metals stress tolerance is available. Transcriptomic analyses of four genes (DREB-1A, DREB-1B, DREB-1F and CBF) were carried out in industrially important plant Ricinus communis under cadmium (Cd) and molybdenum (Mo) treatments...
May 30, 2018: Chemosphere
https://www.readbyqxmd.com/read/29873543/effects-of-mutual-intercropping-on-cadmium-accumulation-by-the-accumulator-plants-conyza-canadensis-cardamine-hirsuta-and-cerastium-glomeratum
#16
Hui Xia, Dong Liang, Fabo Chen, Ming'an Liao, Lijin Lin, Yi Tang, Xiulan Lv, Huanxiu Li, Zhihui Wang, Xun Wang, Jin Wang, Li Liu, Wei Ren
In this study, three cadmium (Cd) accumulator species (Conyza canadensis, Cardamine hirsuta, and Cerastium glomeratum) were co-cultured in Cd-contaminated soil in pots to study the effects of intercropping on co-remediation. Only C. canadensis intercropped with C. glomeratum, C. hirsuta intercropped with C. glomeratum, and three-species intercropping increased plant biomass compared with their respective monocultures. The treatments of C. canadensis intercropped with C. glomeratum and three-species intercropping increased the Cd contents in roots and shoots of C...
July 29, 2018: International Journal of Phytoremediation
https://www.readbyqxmd.com/read/29870946/genetic-variation-in-bioaccumulation-and-partitioning-of-cadmium-in-theobroma-cacao-l
#17
Caleb Lewis, Adrian M Lennon, Gaius Eudoxie, Pathmanathan Umaharan
Cadmium (Cd) is a non-essential heavy metal that is toxic to both plants and animals and chocolates have been identified as a contributor to the human dietary Cd intake. One hundred accessions representing the various genetic groups and hybrid populations in Theobroma cacao L. held at the International Cocoa Genebank, Trinidad were evaluated for leaf and bean cadmium levels with three tree replications. Representative samples of soil from the drip zone around each tree were evaluated for bioavailable cadmium...
June 2, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29869796/ethylene-promotes-cadmium-induced-root-growth-inhibition-through-ein3-controlled-xth33-and-lsu1-expression-in-arabidopsis
#18
Xiangpei Kong, Cuiling Li, Feng Zhang, Qianqian Yu, Shan Gao, Maolin Zhang, Huiyu Tian, Jian Zhang, Xianzheng Yuan, Zhaojun Ding
Cadmium (Cd) stress is one of the most serious heavy metal stresses limiting plant growth and development. However, the molecular mechanisms underlying Cd-induced root growth inhibition remain unclear. Here, we found that ethylene signaling positively regulates Cd-induced root growth inhibition. Arabidopsis seedlings pretreated with the ethylene precursor 1-aminocyclopropane-1-carboxylic acid exhibited enhanced Cd-induced root growth inhibition; while the addition of the ethylene biosynthesis inhibitor aminoethoxyvinyl glycine decreased Cd-induced root growth inhibition...
June 5, 2018: Plant, Cell & Environment
https://www.readbyqxmd.com/read/29866537/effects-of-different-humic-substances-concentrations-on-root-anatomy-and-cd-accumulation-in-seedlings-of-avicennia-germinans-black-mangrove
#19
Marco Pittarello, Jader Galba Busato, Paolo Carletti, Leonardo Valandro Zanetti, Juscimar da Silva, Leonardo Barros Dobbss
Mangrove areas are among most threatened tropical ecosystems worldwide. Among polluting agents Cadmium is often found in high concentrations in mangrove sediments. Humic substances, complex biomolecules formed in soil and sediments during animal and plant residuals decomposition, have a known biostimulant activity and can be adopted to counteract various plant stresses. This study explores, in controlled conditions, the effect of humic substances on Avicennia germinans seedlings, with or without cadmium contamination...
May 2018: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/29860157/cadmium-phytoavailability-under-greenhouse-vegetable-production-system-measured-by-diffusive-gradients-in-thin-films-dgt-and-its-implications-for-the-soil-threshold
#20
Kang Tian, Zhe Xing, Guoming Liu, Huifeng Wang, Mengmeng Jia, Wenyou Hu, Biao Huang
The diffusive gradients in thin films (DGT) technique is recognized to have advantages over traditional techniques. For example, the passive measurement generally follows the principle of metal uptake by plants, and its result incorporates the influences of soil properties, which may make DGT a good protocol for improving soil quality guidelines (SQGs). However, DGT has rarely been applied to assess Cd phytoavailability in soils under greenhouse vegetable production (GVP) systems. In this study, 29 turnips (Raphanussativus L...
May 31, 2018: Environmental Pollution
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