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Title 

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

Authors 

Y H KimJae Cheol JeongHaeng Soon LeeSang Soo Kwak

Publisher 

IOS Press

Issue Date 

2014

Citation 

Journal of Plant Biochemistry and Biotechnology, vol. 23, no. 4, pp. 440-443

Keywords 

Carboxyl-PTIONitric oxidePeroxidaseSodium nitroprussideSweet potato

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.

ISSN 

0971-7811

Link 

http://dx.doi.org/10.1007/s13562-014-0272-8

Appears in Collections

1. Journal Articles > Journal Articles

Registered Date

2019-05-02


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