Two novel 2,6-dichloroisonicotinic acid (INA) derivatives [trifluoroethyl 2,6-dichloroisonicotinate (TFINA) and 2-(2,6-dichloro-pyridine-4-carbonyloxy)-ethyl jasmonate (DPCEJ)] were chemically synthesized and evaluated by bioassay as potential elicitors for inducing the biosynthesis of plant secondary metabolites. A suspension culture of Taxus chinensis, which stably produces a high level of bioactive taxuyunnanine C (Tc), was taken as a model plant cell system. A significant increase in Tc accumulation was observed in the presence of TFINA or DPCEJ. For example, addition of 100 μM TFINA or DPCEJ on day 7 led to a high Tc content of 21.6±2.0 or 27.7±1.0 mg g−1 (on day 21), while the Tc content was 13.7±1.0 and 17.1±0.9 mg g−1 for the control and that with addition of 100 μM INA, respectively. To the best of our knowledge, this is the first report on the use of synthetic INA derivatives for inducing the biosynthesis of plant secondary metabolites. The results indicate that the newly synthesized INA analogues can act as promising elicitors for secondary metabolism induction in plant cell cultures.
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Financial support from the National Natural Science Foundation of China (NSFC project nos. 20225619, 20236040, and 20376023) is gratefully acknowledged.
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Qian, Z., Zhao, Z., Xu, Y. et al. Novel synthetic 2,6-dichloroisonicotinate derivatives as effective elicitors for inducing the biosynthesis of plant secondary metabolites. Appl Microbiol Biotechnol 71, 164–167 (2006). https://doi.org/10.1007/s00253-005-0151-2
- Plant Cell Culture
- Plant Defense Response
- Plant Secondary Metabolite
- Plant Secondary Metabolism