Polygonum cuspidatum herb is a source of resveratrol
Polygonum cuspidatum herb is also known as Japanese knotweed. It grows wildly in most of the states in the US. Most of the resveratrol supplements on the market extract this substance from the Polygonum cuspidatum plant.
Effect of different light intensity on Polygonum
cuspidatum callus
Zhongguo Zhong Yao Za Zhi. 2007 Jul;32(13):1277-80. Agronomy College,
Sichuan Agricultural University, Ya' an 625014, China
To study the effect of light intensity (LI) on the callus induction and
resveratrol content of Polygonum cuspidatum. Taking leaves and stem segment of
Polygonum cuspidatum as explants, the callus was inducted and cultured under
different LI. The growth status of callus was observed and analyzed. The content
of resveratrol was determined by HPLC. The formation and growth of the stem
segment callus were optimal under low light treatment (1340-1560 lx). The
resveratrol content was 18.350 microg x g(-1) in fresh stem segment and 140.074
microg x g(-1) in dry stem segment, which was two times higher than that of wild
P. cuspidatum. Introduction and status of Polygonum cuspidatum callus were
obvious diverse under different LI, the resveratrol content of P. cuspidatum was
enhanced under appropriate LI.