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heavy metal stress on plant

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https://www.readbyqxmd.com/read/27915147/highly-sensitive-optical-interferometric-technique-reveals-stress-dependent-instantaneous-nanometric-growth-fluctuations-of-chinese-chive-leaf-under-heavy-metal-stress
#1
Kokge Thilini Kanchana Muthumali DeSilva, Uma Maheswari Rajagopalan, Hirofumi Kadono
Plant growth apart from being a complex and highly dynamic is dependent on its immediate environment. Leaf expansion measurements using Statistical Interferometry Technique, a sensitive interferometric technique at nanometric accuracy and at sub-second levels revealed the presence of characteristic nanometric intrinsic fluctuations [Plant Biotechnology 31, 195 (2014)]. In this paper, we demonstrate that the nanometric intrinsic fluctuations are sensitive enough that they change under exposure of heavy metals, essential micronutrient zinc and non-essential element cadmium, at relatively low concentrations in the leaves of Chinese chive (Allium tuberosum)...
December 1, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27882494/role-of-rhizophagus-irregularis-in-alleviating-cadmium-toxicity-via-improving-the-growth-micro-and-macroelements-uptake-in-phragmites-australis
#2
Li Wang, Xiaochen Huang, Fang Ma, Shih-Hsin Ho, Jieting Wu, Shishu Zhu
Arbuscular mycorrhizal (AM) fungi have been used to alleviate heavy metal stress on plant growth and uptake of micro- and macroelements. A greenhouse pot experiment was conducted to verify the effects of AM fungus Rhizophagus irregularis on the growth, physiological characteristics, total Cd, and element uptake of Phragmites australis under different Cd stress (in the range of 0-20 mg L(-1)). The results showed that the symbiosis could effectively alleviate Cd toxicity with greater root biomass, higher photosynthesis rate, and lower levels of malonaldehyde (MDA) and proline than non-mycorrhizal plants could...
November 23, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27876226/effect-of-the-selective-pressure-of-sub-lethal-level-of-heavy-metals-on-the-fate-and-distribution-of-args-in-the-catchment-scale
#3
Yan Xu, Jian Xu, Daqing Mao, Yi Luo
Our previous study demonstrated that high levels of antibiotic resistance genes (ARGs) in the Haihe River were directly attributed to the excessive use of antibiotics in animal agriculture. The antibiotic residues of the Xiangjiang River determined in this study were much lower than those of the Haihe River, but the relative abundance of 16 detected ARGs (sul1, sul2 and sul3, qepA, qnrA, qnrB, qnrD and qnrS, tetA, tetB, tetW, tetM, tetQ and tetO, ermB and ermC), were as high as the Haihe River particularly in the downstream of the Xiangjiang River which is close to the extensive metal mining...
January 2017: Environmental Pollution
https://www.readbyqxmd.com/read/27858338/value-added-phytoremediation-of-metal-stressed-soils-using-phosphate-solubilizing-microbial-consortium
#4
REVIEW
Pratishtha Gupta, Vipin Kumar
The presence of heavy metals in the soil is a matter of growing concern due to their toxic and non-biodegradable nature. Lack of effectiveness of various conventional methods due to economic and technical constraints resulted in the search for an eco-friendly and cost-effective biological techniques for heavy metal removal from the environment. Until now, phytoremediation has emerged as an innovative technique to address the problem. However, the efficiency of phytoremediation process is hindered under the high metal concentration conditions...
January 2017: World Journal of Microbiology & Biotechnology
https://www.readbyqxmd.com/read/27833636/hydrogen-sulfide-a-signal-molecule-in-plant-cross-adaptation
#5
REVIEW
Zhong-Guang Li, Xiong Min, Zhi-Hao Zhou
For a long time, hydrogen sulfide (H2S) has been considered as merely a toxic by product of cell metabolism, but nowadays is emerging as a novel gaseous signal molecule, which participates in seed germination, plant growth and development, as well as the acquisition of stress tolerance including cross-adaptation in plants. Cross-adaptation, widely existing in nature, is the phenomenon in which plants expose to a moderate stress can induce the resistance to other stresses. The mechanism of cross-adaptation is involved in a complex signal network consisting of many second messengers such as Ca(2+), abscisic acid, hydrogen peroxide and nitric oxide, as well as their crosstalk...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27769905/improved-method-for-effective-screening-of-acc-1-aminocyclopropane-1-carboxylate-deaminase-producing-microorganisms
#6
Chandrashekhar Patil, Rahul Suryawanshi, Sunil Koli, Satish Patil
Aminocyclopropane-1-carboxylate deaminase (ACCD) producing microorganisms support plant growth under a variety of biotic and abiotic stress conditions such as drought, soil salinity, flooding, heavy metal pollution and phyto-pathogen attack. Available screening methods for ACCD give idea only about its primary microbial ACCD activity than the actual potential. In the present investigation, we have simply improved screening method by incorporating pH indicator dyes (phenol red and bromothymol blue) in ACC containing medium...
October 18, 2016: Journal of Microbiological Methods
https://www.readbyqxmd.com/read/27742885/allantoin-increases-cadmium-tolerance-in-arabidopsis-via-activation-of-antioxidant-mechanisms
#7
Maryam Nourimand, Christopher D Todd
Plants apply various molecular, physiological, and morphological strategies in response to undesirable environmental conditions. One of the possible responses which may contribute to surviving stressful conditions is the accumulation of ureides. Ureides are recognized as important nitrogen-rich compounds involved in recycling nitrogen in plants to support growth and reproduction. Amongst them, allantoin not only serves as a transportable nitrogen-rich compound, but has also been suggested to protect plants from abiotic stresses via minimizing oxidative damage...
October 13, 2016: Plant & Cell Physiology
https://www.readbyqxmd.com/read/27670346/synthetic-and-natural-nutritional-supplements-health-allies-or-risk-to-public-health
#8
Nassia Kioukia-Fougia, Nikolaos Georgiadis, Konstantinos Tsarouhas, Fotini Vasilaki, Persefoni Fragkiadaki, Evangelia Meimeti, Christina Tsitsimpikou
BACKGROUND: The modern way of life involves high stress levels, poor eating habits, lack of exercise, obesity and other detrimental health factors. Nutritional supplements (NS) are complexes of nutrients with variant activity that may infer reversal to nutrient depletion. They tend to be popular amongst social categories associated with the healthy life style, such as the elite and amateur athletes, military people and the general population. OBJECTIVE: An overview of the state of play with regards to nutritional supplements -natural and synthetic-, is important both from toxicological and commercial point of view...
September 23, 2016: Recent Patents on Inflammation & Allergy Drug Discovery
https://www.readbyqxmd.com/read/27642288/isolation-and-characterization-of-scglud2-a-new-sugarcane-beta-1-3-glucanase-d-family-gene-induced-by-sporisorium-scitamineum-aba-h2o2-nacl-and-cdcl2-stresses
#9
Yachun Su, Zhuqing Wang, Feng Liu, Zhu Li, Qiong Peng, Jinlong Guo, Liping Xu, Youxiong Que
Beta-1,3-glucanases (EC 3.2.1.39), commonly known as pathogenesis-related (PR) proteins, play an important role not only in plant defense against fungal pathogens but also in plant physiological and developmental processes. However, only a limited number of sugarcane beta-1,3-glucanase genes have been isolated. In the present study, we identified and characterized a new beta-1,3-glucanase gene ScGluD2 (GenBank Acc No. KF664181) from sugarcane. An X8 domain was present at the C terminal region of ScGluD2, suggesting beta-1,3-glucan-binding function...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27630647/transcriptome-analysis-of-cadmium-treated-roots-in-maize-zea-mays-l
#10
Runqing Yue, Caixia Lu, Jianshuang Qi, Xiaohua Han, Shufeng Yan, Shulei Guo, Lu Liu, Xiaolei Fu, Nana Chen, Haiyan Yin, Haifeng Chi, Shuanggui Tie
Cadmium (Cd) is a heavy metal and is highly toxic to all plant species. However, the underlying molecular mechanism controlling the effects of auxin on the Cd stress response in maize is largely unknown. In this study, the transcriptome produced by maize 'Zheng 58' root responses to Cd stress was sequenced using Illumina sequencing technology. In our study, six RNA-seq libraries yielded a total of 244 million clean short reads and 30.37 Gb of sequence data. A total of 6342 differentially expressed genes (DEGs) were grouped into 908 Gene Ontology (GO) categories and 198 Kyoto Encyclopedia of Genes and Genomes terms...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27623366/silicon-occurrence-uptake-transport-and-mechanisms-of-heavy-metals-minerals-and-salinity-enhanced-tolerance-in-plants-with-future-prospects-a-review
#11
Muhammad Imtiaz, Muhammad Shahid Rizwan, Muhammad Adnan Mushtaq, Muhammad Ashraf, Sher Muhammad Shahzad, Balal Yousaf, Dawood Anser Saeed, Muhammad Rizwan, Muhammad Azher Nawaz, Sajid Mehmood, Shuxin Tu
Recently, heavy metals pollution due to industrialization and urbanization, use of untreated wastewater and unreasonable use of pesticides and fertilizers is increasing rapidly, resulting in major threat to the environment and contaminate soils. Silicon (Si) is the second most abundant element in the earth crust after oxygen. Although it's higher accumulation in plants, yet Si has not been listed as essential nutrient however, considered as beneficial element for growth of plants particularly in stressed environment...
December 1, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27622846/zinc-oxide-nanoparticles-znonps-alleviate-heavy-metal-induced-toxicity-in-leucaena-leucocephala-seedlings-a-physiochemical-analysis
#12
P Venkatachalam, M Jayaraj, R Manikandan, N Geetha, Eldon R Rene, N C Sharma, S V Sahi
The present study describes the role of zinc oxide nanoparticles (ZnONPs) in reversing oxidative stress symptoms induced by heavy metal (Cd and Pb) exposure in Leucaena leucocephala (Lam.) de Wit. Seedling growth was significantly enhanced with the augmentation of ZnONPs following Cd and Pb exposure. Heavy metal accumulations were recorded as 1253.1 mg Cd per kg DW and 1026.8 mg Pb per kg DW for the respective treatments. Results demonstrated that ZnONPs augmentation caused an increase in photosynthetic pigment and total soluble protein contents while a significant decrease in malondialdehyde (MDA-lipid peroxidation) content in leaves...
September 3, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27620529/rhizobacteria-and-plant-symbiosis-in-heavy-metal-uptake-and-its-implications-for-soil-bioremediation
#13
Dana Luminița Sobariu, Daniela Ionela Tudorache Fertu, Mariana Diaconu, Lucian Vasile Pavel, Raluca-Maria Hlihor, Elena Niculina Drăgoi, Silvia Curteanu, Markus Lenz, Philippe François-Xavier Corvini, Maria Gavrilescu
Certain species of plants can benefit from synergistic effects with plant growth-promoting rhizobacteria (PGPR) that improve plant growth and metal accumulation, mitigating toxic effects on plants and increasing their tolerance to heavy metals. The application of PGPR as biofertilizers and atmospheric nitrogen fixators contributes considerably to the intensification of the phytoremediation process. In this paper, we have built a system consisting of rhizospheric Azotobacter microbial populations and Lepidium sativum plants, growing in solutions containing heavy metals in various concentrations...
September 9, 2016: New Biotechnology
https://www.readbyqxmd.com/read/27575042/combined-ability-of-chromium-cr-tolerant-plant-growth-promoting-bacteria-pgpb-and-salicylic-acid-sa-in-attenuation-of-chromium-stress-in-maize-plants
#14
Faisal Islam, Tahira Yasmeen, Muhammad Saleem Arif, Muhammad Riaz, Sher Muhammad Shahzad, Qaiser Imran, Irfan Ali
Heavy metal contamination of agricultural soil has become a serious global problem. This study was aimed to evaluate the effects of two chromium (Cr) tolerant plant growth promoting bacteria (PGPB) in combination with salicylic acid (SA) on plant growth, physiological, biochemical responses and heavy metal uptake under Cr contamination. A pot experiment (autoclaved sand as growing medium) was performed using maize (Zea mays L.) as a test crop under controlled conditions. Cr toxicity significantly reduced plant growth, photosynthetic pigment, carbohydrates metabolism and increased H2O2, MDA, relative membrane permeability, proline and Cr contents in maize leaves...
August 18, 2016: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/27566287/biological-responses-of-symbiotic-rhizobium-radiobacter-strain-vbck1062-to-the-arsenic-contaminated-rhizosphere-soils-of-mung-bean
#15
K V Deepika, M Raghuram, E Kariali, P V Bramhachari
The rationale could be that mung bean is cultivated in areas of arsenic contamination and therefore it is worth investigating how Rhizobium is impacted by arsenic exposure. The objective(s) of the study deals with relationship between Rhizobium metal tolerance and its adaptations to metal stressed environment. The selected strain was recovered from root nodules of Vigna radiata, based on viscous EPS production and arsenic tolerant capacity, identified as R. radiobacter by 16S rDNA sequencing. Batch studies were performed to evaluate toxic effects of heavy metal ions in decreasing order of MIC As(V) (10mM), Cu(1...
August 23, 2016: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27542199/stress-hardening-under-long-term-cadmium-treatment-is-correlated-with-the-activation-of-antioxidative-defence-and-iron-acquisition-of-chloroplasts-in-populus
#16
Ádám Solti, Éva Sárvári, Erzsébet Szöllősi, Brigitta Tóth, Ilona Mészáros, Ferenc Fodor, Zoltán Szigeti
Cadmium (Cd), a highly toxic heavy metal affects growth and metabolic pathways in plants, including photosynthesis. Though Cd is a transition metal with no redox capacity, it generates reactive oxygen species (ROS) indirectly and causes oxidative stress. Nevertheless, the mechanisms involved in long-term Cd tolerance of poplar, candidate for Cd phytoremediation, are not well known. Hydroponically cultured poplar (Populus jacquemontiana var. glauca cv. 'Kopeczkii') plants were treated with 10 μM Cd for 4 weeks...
September 1, 2016: Zeitschrift Für Naturforschung. C, A Journal of Biosciences
https://www.readbyqxmd.com/read/27534966/real-time-kinetics-of-cadmium-transport-and-transcriptomic-analysis-in-low-cadmium-accumulator-miscanthus-sacchariflorus
#17
Haipeng Guo, Chuntao Hong, Mengzhu Xiao, Xiaomin Chen, Houming Chen, Bingsong Zheng, Dean Jiang
The molecular mechanism of low Cd influxes and accumulation in Miscanthus sacchariflorus is revealed by RNA sequencing technique. Soil cadmium (Cd) pollution has posed a serious threat to our soil quality and food security as well as to human health. Some wild plants exhibit high tolerance to heavy metals stress. However, mechanisms of Cd tolerance of wild plants remain to be fully clarified. In this study, we found that two Miscanthus species, Miscanthus (M.) sacchariflorus and M. floridulus, showed different Cd-tolerant mechanisms...
December 2016: Planta
https://www.readbyqxmd.com/read/27527669/phytotoxicity-attenuation-in-vigna-radiata-under-heavy-metal-stress-at-the-presence-of-biochar-and-n-fixing-bacteria
#18
Mihiri Seneviratne, Lakshika Weerasundara, Yong Sik Ok, Jörg Rinklebe, Meththika Vithanage
This study assesses the effect of N-fixing bacteria and biochar synergism on plant growth and development of Vigna mungo under heavy metal stress (HM). Heavy metal stress is a worldwide problem, which causes critical effects on plant life due to oxidative stress. Application of biochar is a recent biological remediation technique, which often leads to an immobilization of heavy metals in soil. . Synergism of bacteria and biochar is a novel aspect to enhance plant growth under heavy metal stress. Woody biochar a byproduct of a dendro power industry was added as 1, 2...
August 12, 2016: Journal of Environmental Management
https://www.readbyqxmd.com/read/27524256/native-prussian-carp-carassius-gibelio-health-status-biochemical-and-histological-responses-to-treated-wastewaters
#19
Natalija Topić Popović, Ivančica Strunjak-Perović, Josip Barišić, Slavko Kepec, Margita Jadan, Blanka Beer-Ljubić, Vesna Matijatko, Dušan Palić, Goran Klobučar, Sanja Babić, Jasenka Gajdoš Kljusurić, Rozelindra Čož-Rakovac
The aim of this study was to assess the impact of treated wastewaters on native wild Prussian carp inhabiting effluent-receiving waters (ERC) receiving municipal and sugar plant treated wastewaters, further downstream waters (DW), and a detached canal unaffected by the WWTP activities. To that end, general fish health status was determined, including plasma biochemical, haematological, oxidative stress and tissue histopathological indices, over three seasons. The greatest tissue alterations were in fall in ERC during sugar beet processing, as hypertrophy of gill epithelial and interlamellar cells, necrosis and lymphocytic infiltration, hyperplasia and hypertrophy of renal tubules, distention of hepatic sinusoids...
November 2016: Environmental Pollution
https://www.readbyqxmd.com/read/27508309/inoculation-of-brassica-oxyrrhina-with-plant-growth-promoting-bacteria-for-the-improvement-of-heavy-metal-phytoremediation-under-drought-conditions
#20
Ying Ma, Mani Rajkumar, Chang Zhang, Helena Freitas
The aim of this study was to investigate the effects of drought resistant serpentine rhizobacteria on plant growth and metal uptake by Brassica oxyrrhina under drought stress (DS) condition. Two drought resistant serpentine rhizobacterial strains namely Pseudomonas libanensis TR1 and Pseudomonas reactans Ph3R3 were selected based on their ability to stimulate seedling growth in roll towel assay. Further assessment on plant growth promoting (PGP) parameters revealed their ability to produce indole-3-acetic acid, siderophore and 1-aminocyclopropane-1-carboxylate deaminase...
December 15, 2016: Journal of Hazardous Materials
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