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New evidences about strictosidine synthase (Str) regulation by salinity, cold stress and nitric oxide in Catharanthus roseus

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Title New evidences about strictosidine synthase (Str) regulation by salinity, cold stress and nitric oxide in Catharanthus roseus
 
Creator Dutta, Ajaswrata
Sen, Jayanti
Deswal, Renu
 
Subject Str
Catharanthus roseus
Calcium
Cold stress
Salt stress
Nitric oxide
 
Description Accepted date: 2 May 2012
Alkaloid production in plants is altered by abiotic stressors, but the mechanism(s) are poorly understood. Present study provides novel evidences about differential regulation of strictosidine synthase (Str), the key gene of terpenoid indole alkaloid (TIA) biosynthetic pathway in response to salinity and low temperature stress in Catharanthus roseus. HPLC analysis of terpene indole alkaloids correlated with differential regulation of Str by low temperature and salinity stress. Administration of exogenous calcium and calcium channel modulator preferentially regulated Str transcript. In addition, administration of kinase and phosphatase inhibitors modulated Str expression. Involvement of nitric oxide (NO) signaling was ascertained by NO donor and nitric oxide synthase (NOS) scavenger treatments. This finding suggests co-ordinated action of calcium, protein kinases, phosphatases and nitric oxide in abiotic stress signaling for TIA biosynthetic pathway in C. roseus.
AD acknowledges Council of Scientific and Industrial Research (CSIR), Government of India for the award of senior
research fellowship. This work was supported by the Department of
Biotechnology, Government of India.
 
Date 2015-11-02T11:00:44Z
2015-11-02T11:00:44Z
2013
 
Type Article
 
Identifier J. Plant Biochem. Biotechnol., 22(1): 124-131
0974-1275
http://link.springer.com/article/10.1007%2Fs13562-012-0118-1
http://172.16.0.77:8080/jspui/handle/123456789/303
 
Language en_US
 
Publisher Springer