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heavy metal stress on plant

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https://www.readbyqxmd.com/read/28092617/supplementation-of-pigs-diet-with-zinc-and-copper-as-alternative-to-conventional-antimicrobials
#1
B Dębski
Modern commercial pig farming systems inflict increased stress in animals, which often leads to various negative changes in the gastro-intestinal tract, especially in the case of piglets. Ban of antibiotics, used as growth promoters, has caused a need for alternatives to conventional antimicrobials in swine diets. Use of pre-/or probiotics, organic acids and plant extracts is often recommended, but it seems that zinc oxide and cooper salts, which were traditionally included in high doses to piglets diet, possess the highest efficacy...
December 1, 2016: Polish Journal of Veterinary Sciences
https://www.readbyqxmd.com/read/28010046/development-of-transgenic-crops-based-on-photo-biotechnology
#2
REVIEW
Markkandan Ganesan, Hyo-Yeon Lee, Jeong-Il Kim, Pill-Soon Song
The phenotypes associated with plant photomorphogenesis such as the suppressed shade avoidance response and de-etiolation offer the potential for significant enhancement of crop yields. Of many light signal transducers and transcription factors involved in the photomorphogenic responses of plants, this review focuses on the transgenic overexpression of the photoreceptor genes at the uppermost stream of the signaling events, particularly phytochromes, crytochromes and phototropins as the transgenes for the genetic engineering of crops with improved harvest yields...
December 23, 2016: Plant, Cell & Environment
https://www.readbyqxmd.com/read/28005214/aluminium-toxicity-to-plants-as-influenced-by-the-properties-of-the-root-growth-environment-affected-by-other-co-stressors-a-review
#3
REVIEW
Joanna Siecińska, Artur Nosalewicz
Aluminium toxicity to crops depends on the acidity of the soil and specific plant resistance. However, it is also strongly affected by other environmental factors that have to be considered to properly evaluate the resultant effects on plants. Observed weather perturbations and predicted climate changes will increase the probability of co-occurrence of aluminium toxicity and other abiotic stresses.In this review the mechanisms of plant-aluminium interactions are shown to be influenced by soil mineral nutrients, heavy metals, organic matter, oxidative stress and drought...
December 23, 2016: Reviews of Environmental Contamination and Toxicology
https://www.readbyqxmd.com/read/27988808/inheritance-and-quantitative-trail-loci-mapping-of-adventitious-root-numbers-in-cucumber-seedlings-under-waterlogging-conditions
#4
Xuewen Xu, Jing Ji, Qiang Xu, Xiaohua Qi, Xuehao Chen
The hypocotyl-derived adventitious root (AR) is an important morphological acclimation to waterlogging stress; however, its genetic basis has not been adequately understood. In the present study, a mixed major gene plus polygene inheritance model was used to analyze AR numbers (ARN) 7 days after waterlogging treatment in six generations (P1, P2, F1, B1, B2, and F2), using cucumber waterlogging tolerant line Zaoer-N and sensitive Pepino as parents. The results showed that the genetic model D-4, mixed one negative dominance major gene and additive-dominance polygenes, is the best-fitting genetic model for waterlogging-triggered ARN phenotype...
December 17, 2016: Molecular Genetics and Genomics: MGG
https://www.readbyqxmd.com/read/27965704/magnesium-alleviates-adverse-effects-of-lead-on-growth-photosynthesis-and-ultrastructural-alterations-of-torreya-grandis-seedlings
#5
Jie Shen, Lili Song, Karin Müller, Yuanyuan Hu, Yang Song, Weiwu Yu, Hailong Wang, Jiasheng Wu
Magnesium (Mg(2+)) has been shown to reduce the physiological and biochemical stress in plants caused by heavy metals. To date our understanding of how Mg(2+) ameliorates the adverse effects of heavy metals in plants is scarce. The potential effect of Mg(2+) on lead (Pb(2+)) toxicity in plants has not yet been studied. This study was designed to clarify the mechanism of Mg(2+)-induced alleviation of lead (Pb(2+)) toxicity. Torreya grandis (T. grandis) seedlings were grown in substrate contaminated with 0, 700 and 1400 mg Pb(2+) per kg(-1) and with or without the addition of 1040 mg kg(-1) Mg(2+)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27951494/the-long-term-resistance-mechanisms-critical-irrigation-threshold-and-relief-capacity-shown-by-eugenia-myrtifolia-plants-in-response-to-saline-reclaimed-water
#6
José Ramón Acosta-Motos, José Antonio Hernández, Sara Álvarez, Gregorio Barba-Espín, María Jesús Sánchez-Blanco
Salts present in irrigation water are serious problems for commercial horticulture, particularly in semi-arid regions. Reclaimed water (RW) typically contains, among others elements, high levels of salts, boron and heavy metal. Phytotoxic ion accumulation in the substrate has been linked to different electric conductivities of the treatments. Based on these premises, we studied the long-term effect of three reclaimed water treatments with different saline concentrations on Eugenia myrtifolia plants. We also looked at the ability of these plants to recover when no drainage was applied...
December 5, 2016: Plant Physiology and Biochemistry: PPB
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
#7
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)...
March 2017: 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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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...
December 2016: Plant & Cell Physiology
https://www.readbyqxmd.com/read/27670346/synthetic-and-natural-nutritional-supplements-health-allies-or-risk-to-public-health
#14
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
#15
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
#16
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
#17
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
#18
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...
January 2017: 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
#19
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
#20
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...
November 2016: Plant Physiology and Biochemistry: PPB
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