Changes in activities of antioxidant enzymes and their gene expression during leaf development of sweetpotato

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Title
Changes in activities of antioxidant enzymes and their gene expression during leaf development of sweetpotato
Author(s)
Yun Hee Kim; Cha Young Kim; Haeng Soon Lee; Sang Soo Kwak
Bibliographic Citation
Plant Growth Regulation, vol. 58, no. 3, pp. 235-241
Publication Year
2009
Abstract
To understand the functions of antioxidant enzymes during leaf development in sweetpotato, we investigated the activities of several antioxidant enzymes such as superoxide dismutase (SOD), peroxidase (POX), ascorbate peroxidase (APX) and catalase (CAT). Significant increases were observed in the activities of SOD, POX and APX during the late stage of leaf development, whereas CAT activity increased during the early developmental stage. By RT-PCR analysis, various POX and APX genes showed differential expression patterns during leaf development. Four POX genes swpa3, swpa4, swpa6, swpb4 and one APX gene swAPX1 exhibited high levels of gene expression during the senescence stage of leaf development, but two POX genes, swpa1 and swpa7 were preferentially expressed at both the mature green and the late senescence stages of leaf development. These results indicate that hydrogen peroxide (H2O2)-related antioxidant enzymes are differentially regulated in the process of leaf development of sweetpotato.
Keyword
antioxidant enzymeleaf developmentsenescencesweetpotato
ISSN
0167-6903
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s10725-009-9371-2
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > 1. Journal Articles
Division of Biomaterials Research > Plant Systems Engineering Research > 1. Journal Articles
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