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Copper In Plants Acquisition Transport And Interactions Pdf

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Function and Regulation of the Plant COPT Family of High-Affinity Copper Transport Proteins

Copper Cu is an essential micronutrient for all eukaryotes because it participates as a redox active cofactor in multiple biological processes, including mitochondrial respiration, photosynthesis, oxidative stress protection, and iron Fe transport. This outlook paper reviews the contribution of our research group to the characterization of the function played by the Arabidopsis thaliana COPT1—6 family of proteins in plant Cu homeostasis. Our studies indicate that the different tissue specificity, Cu-regulated expression, and subcellular localization dictate COPT-specialized contribution to plant Cu transport and distribution. Furthermore, our work with copt2 mutant and COPT-overexpressing plants has also uncovered Cu connections with Fe homeostasis and the circadian clock, respectively. Future studies on the interaction between COPT transporters and other components of the Cu homeostasis network will improve our knowledge of plant Cu acquisition, distribution, regulation, and utilization by Cu-proteins.

Copper Cu toxicity in plants may lead to iron Fe , zinc Zn and manganese Mn deficiencies. Here, we investigated the effect of Si and Fe supply on the concentrations of micronutrients and metal-chelating amino acids nicotianamine NA and histidine His in leaves of cucumber plants exposed to Cu in excess. Cucumber Cucumis sativus L. Additional Fe supply had a more pronounced effect in decreasing Cu accumulation and improving the molar ratio between micronutrients as compared to the Si supply. However, the simultaneous supply of Fe and Si was the most effective treatment in alleviation of Cu-induced deficiency of Fe, Zn and Mn. In conclusion, Si-mediated alleviation of Cu toxicity was directed toward Cu tolerance while Fe-alleviative effect was due to a dramatic decrease in Cu accumulation.

Email: yruela eead. Copper is an essential metal for normal plant growth and development, although it is also potentially toxic. Copper participates in numerous physiological processes and is an essential cofactor for many metalloproteins, however, problems arise when excess copper is present in cells. Excess copper inhibits plant growth and impairs important cellular processes i. Since copper is both an essential cofactor and a toxic element, involving a complex network of metal trafficking pathways, different strategies have evolved in plants to appropriately regulate its homeostasis as a function of the environmental copper level.

Biological effects of high copper and zinc concentrations and their interaction in rapeseed plants

In experiments with rapeseed Brassica napus L. Westar plants, it was confirmed that copper was considerably more toxic than zinc. The analysis of the effects of these concentrations of copper and zinc on photosynthetic pigment contents and on the rate of lipid peroxidation did not reveal any reasons for different toxicities of these heavy metals HM. Among biological effects studied, significant differences were found in the organ distribution of these metals in plants grown on both the standard medium and the medium with high concentrations of copper or zinc. Copper retained in the roots in relatively small amounts and was poorly transported over the aboveground part of the plants. It stayed mainly in the lower leaves, and its distribution changed only a little during the recovery of plants following the HM treatment. In contrast, zinc proved to be highly mobile, it was concentrated in the upper leaves and actively transported when the plants were transferred to a medium with the optimal HM concentrations.

These metrics are regularly updated to reflect usage leading up to the last few days. Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts. The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric. Find more information on the Altmetric Attention Score and how the score is calculated. To ensure an optimal concentration of Cu in food crops, the effectiveness of eight liquid Cu fertilizers was studied in a spinach Spinacia oleracea L.

Copper in plants: acquisition, transport and interactions

In plants, copper Cu acts as essential cofactor of numerous proteins. While the definitive number of these so-called cuproproteins is unknown, they perform central functions in plant cells. As micronutrient, a minimal amount of Cu is needed to ensure cellular functions.

Copper in plants: acquisition, transport and interactions.

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Acknowledgements

Heavy metal—contaminated agricultural soil is a complex and serious phenomenon that has hazardous effects on the environment and, consequently, on humans, animals, plants, and beneficial microorganisms by influencing and tainting food chains, soil, irrigation or potable water, aquifers, and the surrounding atmosphere Wuana and Okieimen, Cadmium Cd is an important poisonous element that is not known for any essential biological function. Furthermore, Cd may cause malfunctioning of metabolic processes Campbell, In plants, Cd causes various types of damage, such as the disturbance of metal homeostasis resulting in iron deficiency in the shoot Fodor et al. As a result, the biosynthesis of chlorophylls, the formation of Chl—protein complexes, and the development of thylakoid membranes are highly disturbed Basa et al.

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