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Quantitative influence of endogenous salicylic acid level on taxuyunnanine C biosynthesis in suspension cultures of Taxus chinensis
Author(s) -
Zhou Xin,
Zhong JianJiang
Publication year - 2011
Publication title -
biotechnology and bioengineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.136
H-Index - 189
eISSN - 1097-0290
pISSN - 0006-3592
DOI - 10.1002/bit.22915
Subject(s) - endogeny , biosynthesis , salicylic acid , taxus , metabolite , biochemistry , secondary metabolite , suspension culture , cell culture , chemistry , biology , botany , enzyme , gene , genetics
Intracellular signals are critical to secondary metabolite biosynthesis by plant cells, but their quantitative effects are not yet well understood in plant cell cultures. Using Taxus chinensis suspension culture, which has the potential to provide a sustainable supply of highly useful bioactive taxoids, this work investigated the impact of endogenous salicylic acid (SA) level on taxuyunnanine C (Tc) biosynthesis. It was observed that the Tc accumulation was strongly dependent on the endogenous SA level. Under elicitation with an endogenous SA of 97.1 ± 11.8 µg/g dry weight, a maximal Tc content of 10.3 ± 0.52 mg/g dry weight was obtained. The transcription levels of Tc biosynthetic genes of geranylgeranyl diphosphate synthase and taxadiene synthase were also analyzed, and they were increased with increase of internal SA level. The results demonstrated that manipulation of endogenous SA level could be an efficient strategy for improving secondary metabolite biosynthesis in plant cell culture. Biotechnol. Bioeng. 2011; 108:216–221. © 2010 Wiley Periodicals, Inc.