Maize response to acute arsenic toxicity as revealed by proteome analysis of plant shoots

Proteomics
Raquel Requejo, Manuel Tena

Abstract

Aerial parts (shoots) of maize seedlings fed hydroponically with 300 muM sodium arsenate [As(V)] or 250 muM sodium arsenite [As(III)] for 24 h were analyzed for differentially expressed proteins by 2-DE and digital image analysis. About 15% of total detected proteins (74 out of 500) were up- or, mainly, down-regulated by arsenic, among which 14 were selected as being those most affected by the metalloid. These proteins were analyzed by MALDI-TOF MS and 7 of them were identified: translation initiation factor eIF-5A, ATP synthase, cysteine synthase, malate dehydrogenase, protein kinase C inhibitor, Tn10 transposase-like protein, and guanine nucleotide binding protein. Each of these proteins was completely repressed by As(V) and/or As(III), except protein kinase C inhibitor, which was newly detected after exposure to As(V).

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Citations

Oct 12, 2012·Environmental Monitoring and Assessment·Saumya Srivastava, Yogesh Kumar Sharma
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Jul 3, 2019·Frontiers in Microbiology·Piyoosh Kumar BabeleVenkatesh Chaturvedi

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