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International Journal of Genomics
Volume 2016, Article ID 8740901, 11 pages
Research Article

Genome-Wide Characterization and Expression Profiles of the Superoxide Dismutase Gene Family in Gossypium

1Institute of Nuclear and Biological Technologies, Xinjiang Academy of Agricultural Sciences, 403 Nanchang Road, Urumqi 830091, China
2School of Life Sciences, Xinjiang Normal University, 102 Xinyi Road, Urumqi 830054, China

Received 27 January 2016; Accepted 3 August 2016

Academic Editor: Kofi Bimpong

Copyright © 2016 Jingbo Zhang et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Superoxide dismutase (SOD) as a group of significant and ubiquitous enzymes plays a critical function in plant growth and development. Previously this gene family has been investigated in Arabidopsis and rice; it has not yet been characterized in cotton. In our study, it was the first time for us to perform a genome-wide analysis of SOD gene family in cotton. Our results showed that 10 genes of SOD gene family were identified in Gossypium arboreum and Gossypium raimondii, including 6 Cu-Zn-SODs, 2 Fe-SODs, and 2 Mn-SODs. The chromosomal distribution analysis revealed that SOD genes are distributed across 7 chromosomes in Gossypium arboreum and 8 chromosomes in Gossypium raimondii. Segmental duplication is predominant duplication event and major contributor for expansion of SOD gene family. Gene structure and protein structure analysis showed that SOD genes have conserved exon/intron arrangement and motif composition. Microarray-based expression analysis revealed that SOD genes have important function in abiotic stress. Moreover, the tissue-specific expression profile reveals the functional divergence of SOD genes in different organs development of cotton. Taken together, this study has imparted new insights into the putative functions of SOD gene family in cotton. Findings of the present investigation could help in understanding the role of SOD gene family in various aspects of the life cycle of cotton.