Effects of irrigation on the physiological characteristics of Panax ginseng molecular mechanisms of ginsenoside biosynthesis
Effects of irrigation on the physiological characteristics of Panax ginseng molecular mechanisms of ginsenoside biosynthesis
- Author(s) T. Zhang, Y.Q. Chen, C. P. Xiao, S.Y. Gao, P. Yu, Y. Chen, Q.H. Zhang, Q. Li and C.B. Chen
- Year: 2022
- Month: January
- Volume: 55
- Pages: 117-132
In 3-years-old ginseng plants grown in pot culture, we determined the changes in ginsenoside content, resistance physiological indicators, key enzyme genes activities in the biosynthetic pathways under 3-irrigation levels (I-40, I-60, I-80 field capacity). The correlation analysis showed that soil relative water content of I-60 has short-term stimulatory effects on the accumulation of potopanaxadiol (PPD) and protopanaxatriol (PPT) -type ginsenosides. The I-60, I-80 field capacity water content had significant effects on the growth of ginseng. Squalene synthetase (SS), ß-amyrin synthase (AS), peroxidase (POD), malondialdehyde (MDA) contents were significantly correlated with ginsenosides biosynthesis. The secondary metabolism of ginseng includes the accumulation of ginsenosides, changes in physiological indicators of resistance gene expression of key enzymes in the synthesis pathway of ginsenosides. The secondary metabolism of ginseng may be a compensation mechanism for ginseng plants to adapt to soil water content. Therefore, for higher yield and better quality of ginseng, it should be cultivated in areas where relative soil water content is I-60.
