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OsMIOX, a myo-inositol oxygenase gene, improves drought tolerance through scavenging of reactive oxygen species in rice (Oryza sativa L.).
MedLine Citation:
PMID:  23017909     Owner:  NLM     Status:  In-Data-Review    
Abstract/OtherAbstract:
Myo-inositol oxygenase (MIOX), a unique monooxygenase, catalyzes the oxidation of myo-inositol to d-glucuronic acid. However, the protective role of MIOX in plants against oxidative stress or drought stress remains unknown. In this study, the functional characterization of MIOX obtained from the cDNA library of upland rice (Oryza sativa L. cv. IRAT109), was performed. OsMIOX was expressed predominantly in the roots and induced by drought, H(2)O(2), salt, cold and abscisic acid. The transgenic rice lines overexpressing OsMIOX showed obviously improved growth performance in the medium containing 200mM mannitol. Further, the survival rate of leaves from the transgenic rice lines was significantly higher than that of the wild type plants under polyethylene glycol treatment. It was discovered that the activity of ROS-scavenging enzymes and proline content, as well as the transcript levels of many ROS scavenging genes were significantly increased in transgenic plants compared to the wild type plants under drought stress conditions. Together, these data suggest that OsMIOX has a specific function in drought stress tolerance by decreasing oxidative damage.
Authors:
Junzhi Duan; Minghui Zhang; Hongliang Zhang; Haiyan Xiong; Pengli Liu; Jauhar Ali; Jinjie Li; Zichao Li
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Publication Detail:
Type:  Journal Article     Date:  2012-08-10
Journal Detail:
Title:  Plant science : an international journal of experimental plant biology     Volume:  196     ISSN:  1873-2259     ISO Abbreviation:  Plant Sci.     Publication Date:  2012 Nov 
Date Detail:
Created Date:  2012-09-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9882015     Medline TA:  Plant Sci     Country:  Ireland    
Other Details:
Languages:  eng     Pagination:  143-51     Citation Subset:  IM    
Copyright Information:
Copyright © 2012 Elsevier Ireland Ltd. All rights reserved.
Affiliation:
Key Lab of Crop Heterosis and Utilization of Ministry of Education, Beijing Key Lab of Crop Genetic Improvement, China Agricultural University, Beijing 100193, PR China. Electronic address: junzhi2004@163.com.
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