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BACKGROUND Hypericum perforatum L. (St. John's wort) is a medicinal plant with pharmacological properties that are antidepressant, anti-inflammatory, antiviral, anti-cancer, and antibacterial. Its major active metabolites are hypericins, hyperforins, and melatonin. However, little genetic information is available for this species, especially that concerning(More)
Lotus corniculatus L. is used worldwide as a forage crop due to its abundance of secondary metabolites and its ability to grow in severe environments. Although the entire genome of L. corniculatus var. japonicus R. is being sequenced, the differences in morphology and production of secondary metabolites between these two related species have led us to(More)
Geranylgeranyl diphosphate (GGPP) synthase is an important branch point enzyme in terpenoid biosynthesis. It regulates the formation of diterpenoid, such as tanshinones. We cloned a gene for GGPP synthase SmGGPPs involved in diterpenoid biosynthesis from Salvia miltiorrhiza. At 2,767 bp long, this gene comprises an intron and two exons that encode a(More)
Real time quantitative PCR (RT-qPCR or qPCR) has been extensively applied for analyzing gene expression because of its accuracy, sensitivity, and high throughput. However, the unsuitable choice of reference gene(s) can lead to a misinterpretation of results. We evaluated the stability of 10 candidates - five traditional housekeeping genes (UBC21, GAPC2,(More)
The dried root of Gentiana macrophylla is a well-known traditional Chinese herbal medicine for treating jaundice, hepatitis, and stomachic and choleretic ailments. However, natural sources are now in short supply. A lack of information about its genetic background has been a great hindrance to producing its active constituents via genetic engineering. We(More)
Dioscorea zingiberensis is the main plant source of diosgenin, a precursor for the production of steroid hormones used in the pharmaceutical industry. The extraction process of diosgenin from D. zingiberensis can generate high-acid and high-strength wastewater on a large scale and can threaten the environment. Bioengineering microorganisms to produce(More)
Gentiana macrophylla, a medicinal plant with significant pharmacological properties, contains the bioactive compound gentiopicroside. Methyl jasmonate (MeJA) is an effective elicitor for enhancing the production of such compounds. However, little is known about MeJA-mediated biosynthesis of gentiopicroside. We investigated this phenomenon as well as gene(More)
Tanshinones are a group of active diterpenes with pharmacological properties, are widely used in treatment of cardiovascular diseases. Jasmonate (JA) acts as an elicitor to enhance tanshinone biosynthesis in Salvia miltiorrhiza. However, due to high labor costs and undesirable chemical characteristics, the use of JA elicitation is still in the experimental(More)
Polygonatum sibiricum polysaccharides (PSPs) are used to improve immunity, alleviate dryness, promote the secretion of fluids, and quench thirst. However, the PSP biosynthetic pathway is largely unknown. Understanding the genetic background will help delineate that pathway at the molecular level so that researchers can develop better conservation(More)
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