Effect of nitric oxide on catharanthine production and growth of Catharanthus roseus suspension cells.

Sodium nitroprusside (SNP) was used as the donor of nitric oxide (NO) to investigate its effect on catharanthine synthesis and the growth of Catharanthus roseus suspension cells. The results showed that SNP at high concentrations (10.0 and 20.0 mmol/L) stimulated catharanthine formation of C. roseus cells, but inhibited growth of the cells. Low concentrations of SNP (0.1 and 0.5 mmol/L) enhanced the growth of C. roseus cells, but had no effect on catharanthine synthesis. The maximum total catharanthine production was achieved by the addition of 0.5 and 10.0 mmol/L SNP to the cultures at day 0 and day 10, respectively, being about threefold of the control. NO-induced catharanthine production of C. roseus cells was strongly suppressed by jasmonic acid (JA) biosynthesis inhibitor ibuprofen (IBU) and nordihydroguaiaretic (NDGA). The result suggests that the stimulatory role of NO on catharanthine production is partially JA-dependent.