Modulation of plant proteome composition is an inevitable process to cope with the environmental challenges including heavy metal (HM) stress. Soil and water contaminated with hazardous metals not only cause permanent and irreversible health problems, but also result substantial reduction in crop yields. In course of time, plants have evolved complex mechanisms to regulate the uptake, mobilization, and intracellular concentration of metal ions to alleviate the stress damages. Since, the functional translated portion of the genome plays an essential role in plant stress response, proteomic studies provide us a finer picture of protein networks and metabolic pathways primarily involved in cellular detoxification and tolerance mechanism. In the present review, an attempt is made to present the state of the art of recent development in proteomic techniques and significant contributions made so far for better understanding the complex mechanism of plant metal stress acclimation. Role of metal stress-related proteins involved in antioxidant defense system and primary metabolism is critically reviewed to get a bird’s-eye view on the different strategies of plants to detoxify HMs. In addition to the advantages and disadvantages of different proteomic methodologies, future applications of proteome study of subcellular organelles are also discussed to get the new insights into the plant cell response to HMs.
Keywords: antioxidant, heavy metal, HSPs, phytochelatins, proteomics, PR protein
Citation: Hossain Z and Komatsu S (2013) Contribution of proteomic studies towards understanding plant heavy metal stress response. Front. Plant Sci. 3:310. doi: 10.3389/fpls.2012.00310
Received: 29 November 2012; Paper pending published: 13 December 2012;
Accepted: 24 December 2012; Published online: 25 January 2013.
Edited by:Pingfang Yang, Wuhan Botanical Garden, Chinese Academy of Sciences, China
Reviewed by:Hans-Peter Mock, Institute of Plant Genetics and Crop Plant Research, Germany
Copyright: © 2013 Hossain and Komatsu. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in other forums, provided the original authors and source are credited and subject to any copyright notices concerning any third-party graphics etc.
*Correspondence: Setsuko Komatsu, National Institute of Crop Science, Kannondai 2-1-18, Tsukuba 305-8518, Japan. e-mail: firstname.lastname@example.org; Zahed Hossain, Department of Botany, West Bengal State University, Kolkata 700126, West Bengal, India. e-mail: email@example.com