Mercury-induced biochemical and proteomic changes in rice roots

Chen, Yun An; Chang, Wen Chang; Huang, Tsai Lien; Lin, Chung Yi; Nguyeh, Thi Thuy Quynh; Hsiung, Yu Chywan; Chia, Li Chiao; Huang, Hao

doi:10.1016/j.plaphy.2012.03.008

Cited by 69 publications

(47 citation statements)

References 40 publications

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“…[66] The generation of oxidative stress, reflected in increased lipid peroxidation in response to Hg exposure was also reported for several macrophyte species. [67][68][69] The stress was related to the alteration of the activity of class III peroxidases, superoxide dismutase, catalase, or lipoxygenase, involved in the regulation of ROS cellular level. [68,69] It is recognized that the mechanisms underlying Hg effects on phytoplankton and macrophytes are dependent on the Hg exposure concentrations.…”

Section: Mercury Intracellular Transformationsmentioning

confidence: 99%

“…[67][68][69] The stress was related to the alteration of the activity of class III peroxidases, superoxide dismutase, catalase, or lipoxygenase, involved in the regulation of ROS cellular level. [68,69] It is recognized that the mechanisms underlying Hg effects on phytoplankton and macrophytes are dependent on the Hg exposure concentrations. Nonetheless, almost all the reported work, described above, has been done at environmentally unrealistic concentrations 10 3 to 10 6 times higher than Hg concentrations in water, suggesting that primary producers will thus very likely not be impacted by ambient mercury concentrations at the population level in the environment.…”

Section: Mercury Intracellular Transformationsmentioning

confidence: 99%

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Towards Mechanistic Understanding of Mercury Availability and Toxicity to Aquatic Primary Producers

Dranguet¹,

Flück²,

Regier³

et al. 2014

Chimia

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The present article reviews current knowledge and recent progress on the bioavailability and toxicity of mercury to aquatic primary producers. Mercury is a ubiquitous toxic trace element of global concern. At the base of the food web, primary producers are central for mercury incorporation into the food web. Here, the emphasis is on key, but still poorly understood, processes governing the interactions between mercury species and phytoplankton, and macrophytes, two representatives of primary producers. Mass transfer to biota surface, adsorption to cell wall, internalization and release from cells, as well as underlying toxicity mechanisms of both inorganic mercury and methylmercury are discussed critically. In addition, the intracellular distribution and transformation processes, their importance for mercury toxicity, species-sensitivity differences and trophic transfer are presented. The mini-review is illustrated with examples of our own research.

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Section: Mercury Intracellular Transformationsmentioning

confidence: 99%

Section: Mercury Intracellular Transformationsmentioning

confidence: 99%

Towards Mechanistic Understanding of Mercury Availability and Toxicity to Aquatic Primary Producers

Dranguet¹,

Flück²,

Regier³

et al. 2014

Chimia

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“…Kadmiyum stresine maruz kalan bitkilerde karbohidrat metabolizması ile ilişkili proteinlerin ekspresyonundaki değişimlerin doz ve türe bağlı olduğu belirtilmiştir (Rodríguez-Celma et al 2010). Bununla birlikte, enolaz ve GAPDH gibi glikolitik yol ile ilişkili proteinlerin Cr(VI) altındaki Miscanthus sinensis köklerinde azaldığı ve bu nedenle glikolize karbon akışının Cr(VI) stresi tarafından inhibe edildiği ileri sürülmüştür (Sharmin et al 2012 Pirüvat dehidrogenaz kompleksinin (PDC) bileşenleri, akonitaz, NADP-bağımlı malik enzim (NADP-ME), süksinat dehidrogenaz ve malat dehidrogenaz (MDH) gibi TCA döngüsü ile ilişkili enzimlerin ekspresyonundaki değişimler ağır metal stresine maruz kalan bitkilerde belirlenmiştir (Ahsan et al 2010;Rodríguez-Celma et al 2010;Chen et al 2012). Dihidrolipoamid dehidrogenaz, plastidlerde PDC, mitokondrilerde ise glisin dekarboksilaz kompleksinin (GDC) alt birimidir.…”

Section: Primer Karbon Ve Enerji Metabolizması Ile İlişkili Proteinlerunclassified

“…Askorbat peroksidaz (APX), indirgenmiş askorbik asidin (AsA) varlığında H 2 O 2 'in suya indirgenmesinde işlev görmekte ve oluşan dehidroaskorbat indirgenmiş glutatyonu elektron vericisi olarak kullanıldığı reaksiyonla dehidroaskorbat redüktaz (DHAR) tarafından AsA'ya dönüştürülmektedir. Bu askorbat döngüsü enzimlerinin yanında monodehidroaskorbat redüktaz (MDHAR) ve okside glutatyonun (GSSG) GSH'a indirgenmesini sağlayan glutatyon redüktaz (GR) proteininin de ağır metallerce teşvik edildiği birçok proteomik çalışmada gösterilmiştir Song et al 2013;Chen et al 2012). Bu enzimlerden APX ve DHAR'ın yanı sıra bir diğer H 2 O 2 temizleyici enzim olan peroksidazların (POD) bakıra toleranslı çeltik çeşidinde daha fazla eksprese olduğu belirtilmiştir (Song et al 2013).…”

Section: Antioksidant Savunma Ve Detoksifikasyon Ile İlişkili Proteinlerunclassified

“…Sıcaklık şoku proteinlerine ek olarak protein disülfid izomeraz (PDI) proteininin miktarındaki ağır metal teşvikli değişimler birçok proteomik çalışmada gösterilmiştir (Ahsan et al 2008;Zeng et al 2011;Chen et al 2012). Bir endoplazmik retikulum proteini olan PDI, yanlış oluşmuş disülfid bağlarını düzelterek yeni sentezlenen proteinlerin olgunlaşmasında önemli rol oynamaktadır (Song and Wang 1995).…”

Section: Protein Metabolizması Ile İlişkili Proteinlerunclassified

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Heavy Metal Toxicity in Plants: Proteomics Approach

Terzi¹,

Yıldız²

2013

AKU-J. Sci. Eng.

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ÖzetAğır metal kirliliği, insan sağlığını olumsuz etkileyen ve tarımsal verimde kayıplara neden olan önemli çevresel tehlikelerden biridir. Bitki hücresinin en önemli fonksiyonu, kendi savunması için ağır metal stresine karşı cevap vermektir. Ağır metal stresine cevap olarak fonksiyonel genler veya proteinlerin teşhisi stres cevaplarının moleküler mekanizmalarının anlaşılmasında önemli bir basamaktır. Protein ekspresyonu sadece transkripsiyonel seviyede değil, aynı zamanda translasyonel ve post-translasyonel seviyelerde de düzenlenmektedir. Bu nedenle, farklı stres koşulları altında bitki proteomundaki değişimleri araştırmak önemlidir. Genom tarafından eksprese olan proteinlerin geniş ölçekli analizi olarak tanımlanan proteomik, sadece proteomun tamamını tanımlamak için değil, aynı zamanda ağır metal stresi gibi farklı fizyolojik koşullar altındaki proteomların karşılaştırılması için güçlü bir moleküler araçtır. Bu derlemede, proteomik teknolojileri ve bitkilerde farklı metabolik olaylarda rolü olan ağır metal teşvikli proteinler tartışılmıştır. Heavy Metal Toxicity in Plants: Proteomics Approach Key wordsPlants; Heavy Metal; Toxicity; Proteomics; Mass Spectrometry AbstractHeavy metal contamination is one of the major environmental hazards, leading to losses in agricultural yields and harmfully affecting human health. The most crucial function of plant cell is to respond against heavy metal stress for self-defence. The identification of the functional genes or proteins that are involved in responses to heavy-metal stress is a fundamental step in understanding the molecular mechanisms of stress responses. Protein expression is regulated not only at the transcriptional level, but also at the translational and post-translational levels. Therefore, it is crucial to investigate the changes in plant proteome under different stress conditions. Proteomics, defined as the large-scale analysis of proteins expressed by the genome, is not only a powerful molecular tool for describing complete proteome, but also for comparative proteomes under different physiological conditions, such as heavy metal stress. In this review, proteomics technologies, and heavy metal induced proteins which play a role in different metabolic events in plants are discussed.

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Heavy Metal Adaptation

Guevara-García

et al. 2017

Encyclopedia of Life Sciences

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Fifty‐three chemical elements, those with densities higher than 5 g cm −3 , are categorized as heavy metals. Ecologically speaking, any element that is not used in basic metabolism or biodegradable should be regarded as a heavy metal. Heavy metals are natural components of the biosphere and as such are part of biogeochemical cycles; however, as a consequence of human activities, heavy metal concentrations have reached toxic levels in the soils and water bodies of many ecosystems around the world. Actually, using multidisciplinary approaches, including ‘omics’ strategies, several factors involved in heavy metal adaptation have been identified. In the coming years, the detailed study of the contribution of these factors to the heavy metal tolerance mechanism, as well as the crosstalk between them, should produce the necessary knowledge for the development of heavy metal‐tolerant crops that would improve agricultural productivity to meet growing food demand. Key Concepts Heavy metals are the group of chemical elements with densities higher than 5 g cm −3 . Any chemical element that causes environmental pollution could be considered as heavy metal. Heavy metal concentrations increase to toxic levels through human activities. Biogeochemical cycles are considered to have an important role in maintaining environmental equilibrium of heavy metals. All heavy metals reaching a concentration higher than 0.1% generate a polluted and toxic environment. Metallophytes can be used as biomarkers of heavy metal‐polluted soils. Hyperaccumulator plants are those that actively take up and translocate heavy metals from the soil, accumulating them in aboveground organs. Some plant exudates (named phytosiderophores) are known to take part in the uptake and mobilisation of heavy metals.

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Mercury-induced biochemical and proteomic changes in rice roots

Cited by 69 publications

References 40 publications

Towards Mechanistic Understanding of Mercury Availability and Toxicity to Aquatic Primary Producers

Towards Mechanistic Understanding of Mercury Availability and Toxicity to Aquatic Primary Producers

Heavy Metal Toxicity in Plants: Proteomics Approach

Heavy Metal Adaptation

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