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Metal plant defense

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https://www.readbyqxmd.com/read/28239385/hydrogen-peroxide-pretreatment-mitigates-cadmium-induced-oxidative-stress-in-brassica-napus-l-an-intrinsic-study-on-antioxidant-defense-and-glyoxalase-systems
#1
Mirza Hasanuzzaman, Kamrun Nahar, Sarvajeet S Gill, Hesham F Alharby, Bam H N Razafindrabe, Masayuki Fujita
Cadmium (Cd) is considered as one of the most toxic metals for plant growth and development. In the present study, we investigated the role of externally applied hydrogen peroxide (H2O2) in regulating the antioxidant defense and glyoxalase systems in conferring Cd-induced oxidative stress tolerance in rapeseed (Brassica napus L.). Seedlings were pretreated with 50 μM H2O2 for 24 h. These pretreated seedlings as well as non-pretreated seedlings were grown for another 48 h at two concentrations of CdCl(2) (0...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28231506/plant-chromium-uptake-and-transport-physiological-effects-and-recent-advances-in-molecular-investigations
#2
REVIEW
Maria Angélica da Conceição Gomes, Rachel Ann Hauser-Davis, Marina Satika Suzuki, Angela Pierre Vitória
Increasingly, anthropogenic perturbations of the biosphere manifest in a broad array of global phenomena, causing widespread contamination of most ecosystems, with high dispersion rates of many contaminants throughout different environmental compartments, including metals. Chromium (Cr) contamination in particular, is, increasingly, posing a serious threat to the environment, emerging as a major health hazard to the biota. However, although the molecular and physiological mechanisms of plant responses to many heavy metals, especially lead (Pb) and cadmium (Cd), have been focused upon in recent years, chromium has attracted significantly less attention...
February 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28187710/ionomic-and-metabolic-responses-to-neutral-salt-or-alkaline-salt-stresses-in-maize-zea-mays-l-seedlings
#3
Rui Guo, LianXuan Shi, Changrong Yan, Xiuli Zhong, FengXue Gu, Qi Liu, Xu Xia, Haoru Li
BACKGROUND: Soil salinity and alkalinity present a serious threat to global agriculture. However, most of the studies have focused on neutral salt stress, and the information on the metabolic responses of plants to alkaline salt stress is limited. This investigation aimed at determining the influence of neutral salt and alkaline salt stresses on the content of metal elements and metabolites in maize plant tissues, by using mixtures of various proportions of NaCl, NaHCO3, Na2SO4, and Na2CO3...
February 10, 2017: BMC Plant Biology
https://www.readbyqxmd.com/read/28117669/coordinated-actions-of-glyoxalase-and-antioxidant-defense-systems-in-conferring-abiotic-stress-tolerance-in-plants
#4
REVIEW
Mirza Hasanuzzaman, Kamrun Nahar, Md Shahadat Hossain, Jubayer Al Mahmud, Anisur Rahman, Masashi Inafuku, Hirosuke Oku, Masayuki Fujita
Being sessile organisms, plants are frequently exposed to various environmental stresses that cause several physiological disorders and even death. Oxidative stress is one of the common consequences of abiotic stress in plants, which is caused by excess generation of reactive oxygen species (ROS). Sometimes ROS production exceeds the capacity of antioxidant defense systems, which leads to oxidative stress. In line with ROS, plants also produce a high amount of methylglyoxal (MG), which is an α-oxoaldehyde compound, highly reactive, cytotoxic, and produced via different enzymatic and non-enzymatic reactions...
January 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28030779/nitric-oxide-improves-s-assimilation-and-gsh-production-to-prevent-inhibitory-effects-of-cadmium-stress-on-photosynthesis-in-mustard-brassica-juncea-l
#5
Tasir S Per, Asim Masood, Nafees A Khan
Nitric oxide (NO) is an important gaseous signalling molecule that participates in many developmental and physiological processes, including defense responses against toxic metals in plants. The role of NO in cadmium (Cd)-induced toxic effects on photosynthesis was examined in mustard (Brassica juncea L.) plants. Exposure of plants to 50 μM Cd significantly enhanced oxidative stress (H2O2 content and lipid peroxidation) and impaired plant growth and photosynthesis, chlorophyll fluorescence and reduced chlorophyll content and stomatal conductance...
December 25, 2016: Nitric Oxide: Biology and Chemistry
https://www.readbyqxmd.com/read/28018404/functional-and-integrative-analysis-of-the-proteomic-profile-of-radish-root-under-pb-exposure
#6
Yan Wang, Liang Xu, Mingjia Tang, Haiyan Jiang, Wei Chen, Wei Zhang, Ronghua Wang, Liwang Liu
Lead (Pb) is one of the most abundant heavy metal (HM) pollutants, which can penetrate the plant through the root and then enter the food chain causing potential health risks for human beings. Radish is an important root vegetable crop worldwide. To investigate the mechanism underlying plant response to Pb stress in radish, the protein profile changes of radish roots respectively upon Pb(NO3)2 at 500 mg L(-1)(Pb500) and 1000 mg L(-1)(Pb1000), were comprehensively analyzed using iTRAQ (Isobaric Tag for Relative and Absolute Quantification)...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27989938/proteomic-analysis-provides-insights-into-the-molecular-bases-of-hydrogen-gas-induced-cadmium-resistance-in-medicago-sativa
#7
Chen Dai, Weiti Cui, Jincheng Pan, Yanjie Xie, Jin Wang, Wenbiao Shen
Recently, molecular hydrogen (H2) has emerged as a bio-regulator both in animals and plants. Normally, functions of endogenous generated H2 could be mimicked by exogenously applied hydrogen-rich water (HRW) or hydrogen-rich saline (particularly in animals). Although alfalfa seedlings showed more cadmium (Cd) resistance after the administration with HRW, corresponding molecular mechanism is still elusive. To address this gap, iTRAQ-based quantitative proteomics was used. The results showed that a total of 2377 proteins were identified with <1% FDR, and 1254 protein abundance perturbations were confidently assessed...
January 30, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/27933379/the-role-of-receptor-like-protein-kinases-rlks-in-abiotic-stress-response-in-plants
#8
REVIEW
Yaoyao Ye, Yanfei Ding, Qiong Jiang, Feijuan Wang, Junwei Sun, Cheng Zhu
We review and introduce recent studies on RLK s involved in the abiotic stress response and provide insights into potential regulatory mechanisms for alleviating abiotic stress. Abiotic stresses are important factors affecting plant growth and development, resulting in crop production reduction and even plant death. To survive, plants utilize different mechanisms to respond and adapt to continuously changing environmental factors. Understanding of the molecular mechanisms of plant response to various stresses will aid in improving tolerance of plants to abiotic stress through genetic engineering, which would greatly promote the development of modern agriculture...
December 8, 2016: Plant Cell Reports
https://www.readbyqxmd.com/read/27917181/nitric-oxide-responsive-heavy-metal-associated-gene-athmad1-contributes-to-development-and-disease-resistance-in-arabidopsis-thaliana
#9
Q Muhammad Imran, Noreen Falak, Adil Hussain, Bong-Gyu Mun, Arti Sharma, Sang-Uk Lee, Kyung-Min Kim, Byung-Wook Yun
Exposure of plants to different biotic and abiotic stress condition instigates significant change in the cellular redox status; resulting in the elevation of reactive nitrogen species that play signaling role in mediating defense responses. Heavy metal associated (HMA) domain containing genes are required for spatio-temporal transportation of metal ions that bind with various enzymes and co-factors within the cell. To uncover the underlying mechanisms mediated by AtHMA genes, we identified 14 Arabidopsis HMA genes that were differentially expressed in response to nitrosative stress through RNA-seq analysis...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27882491/influence-of-phosphorous-fertilization-on-copper-phytoextraction-and-antioxidant-defenses-in-castor-bean-ricinus-communis-l
#10
Guoyong Huang, Muhammad Shahid Rizwan, Chao Ren, Guangguang Guo, Qingling Fu, Jun Zhu, Hongqing Hu
Application of fertilizers to supply appropriate nutrients has become an essential agricultural strategy for enhancing the efficiency of phytoremediation in heavy metal contaminated soils. The present study was conducted to investigate the beneficial effects of three types of phosphate fertilizers (i.e., oxalic acid-activated phosphate rock (APR), Ca(H2PO4)2, and NaH2PO4) in the range of 0-600 mg P kg(-1) soil, on castor bean growth, antioxidants [antioxidative enzymes and glutathione (GSH)], and Cu uptake...
November 23, 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27741459/the-ground-beetle-parallelomorphus-laevigatus-is-a-potential-indicator-of-trace-metal-contamination-on-the-eastern-coast-of-sicily
#11
Erminia Conti, Sandro Dattilo, Giovanni Costa, Concetto Puglisi
Carabids are generally considered to be non-specialized predators, and they have been considered useful ecological indicators. They can play a key role in clarifying the route of contaminants in food webs because they are predators of small invertebrates and, in turn, part of the diet of several vertebrates. The Mediterranean species Parallelomorphus laevigatus, which so far has not been studied from an ecotoxicological point of view, is an excellent ecological indicator in sandy coastal environments. We investigated the accumulation of trace elements in Ionian populations of P...
January 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/27734509/zinc-hyperaccumulation-substitutes-for-defense-failures-beyond-salicylate-and-jasmonate-signaling-pathways-of-alternaria-brassicicola-attack-in-noccaea-caerulescens
#12
Berta Gallego, Soledad Martos, Catalina Cabot, Juan Barceló, Charlotte Poschenrieder
The hypothesis of metal defense as a substitute for a defective biotic stress signaling system in metal hyperaccumulators was tested using the pathosystem Alternaria brassicicola-Noccaea caerulescens under low (2 µM), medium (12 µM) and high (102 µM) Zn supply. Regardless the Zn supply, N. caerulescens responded to fungal attack with the activation of both HMA4 coding for a Zn transporter, and biotic stress signaling pathways. Salicylate, jasmonate, abscisic acid and indoleacetic acid concentrations, as well as biotic stress marker genes (PDF1...
April 2017: Physiologia Plantarum
https://www.readbyqxmd.com/read/27702579/priming-with-no-controls-redox-state-and-prevents-cadmium-induced-general-up-regulation-of-methionine-sulfoxide-reductase-gene-family-in-arabidopsis
#13
Andrea A E Méndez, Liliana B Pena, María P Benavides, Susana M Gallego
In the present study we evaluated the pre-treatment (priming) of Arabidopsis thaliana plants with sodium nitroprusside (SNP), a NO-donor, as an interesting approach for improving plant tolerance to cadmium stress. We focused on the cell redox balance and on the methionine sulfoxide reductases (MSR) family as a key component of such response. MSR catalyse the reversible oxidation of MetSO residues back to Met. Five MSRA genes and nine MSRB genes have been identified in A. thaliana, coding for proteins with different subcellular locations...
December 2016: Biochimie
https://www.readbyqxmd.com/read/27687587/essential-and-beneficial-trace-elements-in-plants-and-their-transport-in-roots-a-review
#14
REVIEW
Recep Vatansever, Ibrahim Ilker Ozyigit, Ertugrul Filiz
The essentiality of 14 mineral elements so far have been reported in plant nutrition. Eight of these elements were known as micronutrients due to their lower concentrations in plants (usually ≤100 mg/kg/dw). However, it is still challenging to mention an exact number of plant micronutrients since some elements have not been strictly proposed yet either as essential or beneficial. Micronutrients participate in very diverse metabolic processes, including from the primary and secondary metabolism to the cell defense, and from the signal transduction to the gene regulation, energy metabolism, and hormone perception...
January 2017: Applied Biochemistry and Biotechnology
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/27582750/analysis-of-copper-binding-proteins-in-rice-radicles-exposed-to-excess-copper-and-hydrogen-peroxide-stress
#16
Hongxiao Zhang, Yan Xia, Chen Chen, Kai Zhuang, Yufeng Song, Zhenguo Shen
Copper (Cu) is an essential micronutrient for plants, but excess Cu can inactivate and disturb the protein function due to unavoidable binding to proteins at the cellular level. As a redox-active metal, Cu toxicity is mediated by the formation of reactive oxygen species (ROS). Cu-binding structural motifs may alleviate Cu-induced damage by decreasing free Cu(2+) activity in cytoplasm or scavenging ROS. The identification of Cu-binding proteins involved in the response of plants to Cu or ROS toxicity may increase our understanding the mechanisms of metal toxicity and tolerance in plants...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27579677/systematic-isolation-and-characterization-of-cadmium-tolerant-genes-in-tobacco-a-cdna-library-construction-and-screening-approach
#17
Mei Zhang, Hui Mo, Wen Sun, Yan Guo, Jing Li
Heavy metal pollution is a major limiting factor that severely affects plant growth worldwide, and the accumulation of heavy metal in the plant may be hazardous to human health. To identify the processes involved in cadmium detoxification, we constructed a cDNA library of tobacco roots acclimated to cadmium (Cd) stress. According to the results of functional screening cDNA library with a yeast Cd-sensitive mutant, ycf1Δ, we obtained a series of candidate genes that were involved in Cd response. Sequence analysis and yeast functional complementation of 24 positive cDNA clones revealed that, in addition to antioxidant genes, genes implicated in abiotic and biotic stress defenses, cellular metabolism, and signal transduction showed Cd detoxification effects in yeast...
2016: PloS One
https://www.readbyqxmd.com/read/27539469/assessment-of-oxidative-stress-and-activities-of-antioxidant-enzymes-depicts-the-negative-systemic-effect-of-iron-containing-fertilizers-and-plant-phenolic-compounds-in-the-desert-locust
#18
David Renault, Moataza A Dorrah, Amr A Mohamed, Eman A Abdelfattah, Taha T M Bassal
For herbivore insects, digesting can be somewhat challenging, as the defense mechanisms evolved by plants, including the release of phenolics like the non-protein amino acid L-3,4-dihydroxyphenylalanine (L-DOPA), can cause fitness costs. In addition, industrial and agricultural activities have elevated the amounts of iron that can be found in nature and more particularly FeSO4 that is used as fertilizer. Traces of iron can enhance the auto-oxidation of L-DOPA, in turn, generating reactive oxygen species (ROS) and consequently oxidative stress in insects...
November 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/27512401/role-of-silicon-counteracting-cadmium-toxicity-in-alfalfa-medicago-sativa-l
#19
Ahmad H Kabir, Mohammad M Hossain, Most A Khatun, Abul Mandal, Syed A Haider
Cadmium (Cd) is one of the most phytotoxic elements causing an agricultural problem and human health hazards. This work investigates whether and how silicon (Si) ameliorates Cd toxicity in Alfalfa. The addition of Si in Cd-stressed plants caused significant improvement in morpho-physiological features as well as total protein and membrane stability, indicating that Si does have critical roles in Cd detoxification in Alfalfa. Furthermore, Si supplementation in Cd-stressed plants showed a significant decrease in Cd and Fe concentrations in both roots and shoots compared with Cd-stressed plants, revealing that Si-mediated tolerance to Cd stress is associated with Cd inhibition in Alfalfa...
2016: Frontiers in Plant Science
https://www.readbyqxmd.com/read/27448721/physiological-and-molecular-responses-to-heavy-metal-stresses-suggest-different-detoxification-mechanism-of-populus-deltoides-and-p-x-canadensis
#20
Dániel Benyó, Edit Horváth, Edit Németh, Tünde Leviczky, Kinga Takács, Nóra Lehotai, Gábor Feigl, Zsuzsanna Kolbert, Attila Ördög, Róbert Gallé, Jolán Csiszár, László Szabados, László Erdei, Ágnes Gallé
Plants have divergent defense mechanisms against the harmful effects of heavy metals present in excess in soils and groundwaters. Poplars (Populus spp.) are widely cultivated because of their rapid growth and high biomass production, and members of the genus are increasingly used as experimental model organisms of trees and for phytoremediation purposes. Our aim was to investigate the copper and zinc stress responses of three outstanding biomass producer bred poplar lines to identify such transcripts of genes involved in the detoxification mechanisms, which can play an important role in the protection against heavy metals...
August 20, 2016: Journal of Plant Physiology
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