Effect of potassium supplementation on monoterpene production of Houttuynia cordata

摘要

Houttuynia cordata?Thunb. is an aromatic herb rich in monoterpenes. However, little information is available about the effect of potassium (K) on the monoterpene production. In this study, plants were cultured with different K levels and the monoterpenes in?H. cordata?were determined. Results showed that total monoterpene content only had?a minor share (9.85%) of?essential?oil in the control treatment?(0 mM), while?it showed a remarkable?increase in the treatments supplemented with?potassium and 10.26 mM K resulted in the maximum total monoterpenes (43.25%). The total monoterpenes?was?strongly associated with?the stimulation of monoterpene hydrocarbons.?According to correlation analysis, the increase of monoterpenes was mainly attributed to potassium supplementation. This implies that?potassium?is very important for the monoterpene production of?H.?cordata.