Responses of sweet potato peroxidases to sodium nitroprusside-mediated nitric oxide

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Title
Responses of sweet potato peroxidases to sodium nitroprusside-mediated nitric oxide
Author(s)
Y H Kim; Jae Cheol Jeong; Haeng Soon Lee; Sang Soo Kwak
Bibliographic Citation
Journal of Plant Biochemistry and Biotechnology, vol. 23, no. 4, pp. 440-443
Publication Year
2014
Abstract
To ascertain the response of sweetpotato peroxidases (PODs) to nitric oxide (NO), we treated the leaves of sweet potato with the NO generator sodium nitroprusside (SNP) and the NO scavenger carboxyl-PTIO (cPTIO). Exogenous application of more than 5 mM SNP caused damage to sweetpotato leaves at 24 h after treatment. The accumulation of NO in leaves was positively correlated with the SNP dose. The specific activity of PODs in sweet potato leaves was markedly increased by treatment with greater than 1 mM SNP for 24 h, whereas POD activity and accumulated NO content decreased to low levels by treatment with cPTIO. Expression analysis of POD genes in response to treatment with SNP and cPTIO revealed that major stress-inducible acidic genes, such as swpa1, swpa2, swpa3, and swpa4, were specifically regulated. These results indicate that increased NO levels in sweet potato leaves are closely linked to an improved defense capability mediated by stress-inducible PODs.
Keyword
Carboxyl-PTIONitric oxidePeroxidaseSodium nitroprussideSweet potato
ISSN
0971-7811
Publisher
Springer
DOI
http://dx.doi.org/10.1007/s13562-014-0272-8
Type
Article
Appears in Collections:
Jeonbuk Branch Institute > Biological Resource Center > 1. Journal Articles
Division of Research on National Challenges > Plant Systems Engineering Research > 1. Journal Articles
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