Abstract—Arsenic (As) contamination in natural environment is a problem in many countries. Plants exposed to As show cytotoxic effects as inhibit cellular function, disrupt metabolism and reduce the yield. However, little is known about the molecular mechanisms of rice early expose to arsenate (AsV) at low concentration (10μM). Therefore, to better understand the molecular basis of rice cells, we performed a large-scale during analysis of the rice transcriptome within 24 hours challenged with AsV, one kind of common As inorganic species. In our microarray data, 614 transcripts were identified in response to AsV treatment. These transcripts related in plant defense mechanisms and the regulation of genes encoding to glutathione-S-transferase, oxidative stress, heat shock protein and enzymes in the ubiquitination pathway of protein degradation. Several important genes related to sulfate assimilation and GSH metabolism were induced for detoxification of As. Activities of peroxidase (POD) in rice roots increased after 12h and 24h treated to AsV, while the glutathione content at 12 h displayed decreasing trend but increasing trend after 24 h. Taken together, these data provide an overview of novel insights of AsV detoxification in rice and elicited for further investigation mechanism of arsenic detoxification in plants.

Index Terms—Arsenite, transcriptome, rice, glutathione.

Quynh-Thi Thuy Nguyen and Hao-Jen Huang are with Department of Life Sciences, National Cheng Kung University, Taiwan (e-mail: baokhanh0808@yahoo.com.vn).
Tsai-Lien Huang is with Center for General Eduction, Tzu Chi College of Technology, Taiwan.

 

Cite: Quynh-Thi Thuy Nguyen, Tsai-Lien Huang, and Hao-Jen Huang, "Identification of Genes Related to Arsenic Detoxification in Rice Roots Using Microarray Analysis," International Journal of Bioscience, Biochemistry and Bioinformatics vol. 4, no. 1, pp. 22-27, 2014.