ABSTRACT Catharanthus roseus (C. roseus) plants were used to investigate the terpenoid indole alkaloids (TIAs) accumulation under the condition of PEG-induced drought stress. Multivariate analysis showed that 35% PEG6000 could induce more obvious and stable accumulation on proline (PRO) content and the relative water content (RWC). The results indicated that there were gradual increase and then decrease (p < .05) in the contents of vindoline (VIN) and catharanthine (CAT) under 35% PEG6000 stress, but the content of vinblastine (VBL) increased gradually. In addition, the expression levels of tryptophan decarboxylase (TDC), strictosidine synthase (STR) and deacetylvindoline-4-O-acetyltransferase (DAT) were upregulated in plants under 35% PEG6000 stress. Further correlation analysis indicated that CAT accumulation was significantly correlated with TDC gene expression, and VBL accumulation was significantly correlated with peroxidase (p < .05). Our results suggest that the cultivation of C. roseus in drought stress would serve as effective treatment for accumulating TIAs.
Effects of PEG-induced drought stress on regulation of indole alkaloid biosynthesis in Catharanthus roseus
Y. Liu,Qinghuan Meng,Xihua Duan,Zhonghua Zhang,D. Li
Published 2017 in Journal of Plant Interactions
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- Publication year
2017
- Venue
Journal of Plant Interactions
- Publication date
2017-01-01
- Fields of study
Biology, Environmental Science
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