Abstract
Pogang gan (Curcuma sp., Zingiberaceae family) is medicinal herb and threatened and it is usually used as a tonic. We successfully micropropagated and cultivated this species. This study determined the total alkaloid, polyphenol, flavonoid and saponin contents of its growth time in order to determine harvest time. The highest level of total alkaloid content is roots after 11 months cultivation (0.272 mg/g), total polyphenol content is rhizomes after 11 months (1.71 mg GAE/g), total flavonoid content is rhizomes after 11 months (13.89 mg QE/g) and total saponin content is tubers and roots after 11 months (5.26% and 4.78%). The total content of alkaloid and flavonoid of pogang gan is higher than Curcuma zedoaria. The total saponin content of natural pogang gan is equal to 39.5% of 6-year old Vietnamese ginseng and the saponin content in rhizomes and tubers of 11-month-planted Pogang gan is from 55.5% to 67.8%, compared with natural Pogang gan.
Highlights
The medicinal herb Pogang gan (Curcuma sp., Zingiberaceae family) has the narrow habit and low reserve, but it is usually used as a tonic
Ta2: rhizomes of cultivated pogang gan after 6 months cultivated; at that time the trees have formated rhizomes and tubers; Ta3: tubers of pogang gan after 11 months cultivated; Ta4: tubers pogang gan after 6 months cultivated; Ta5: small roots of pogang gan after 11 months cultivated; SNL: rhizomes of 6 years old vietnamese gingseng (Panax vietnamensis); Figure 1. pogang gan: (a) trees of pogang gan; (b) a parts used In order to evaluate the contents of alkaloid, polyphenol, flavonoid and saponin, after drying up by solar energy, samples were desiccated at 1050C in 4 hours
Table 1. shows that total alkaloid content of Pogang gan’s rhizome and small root is higher than white turmeric, excepts tubers and rhizome of 6-month-planted
Summary
The medicinal herb Pogang gan (Curcuma sp., Zingiberaceae family) has the narrow habit and low reserve, but it is usually used as a tonic. We successfully have propagated this species (Van Tan, 2016) but we have not determined the science name of Pogang gan’s species yet because its inflorescence has been found. There are a lot of points in genus Curcuma among Curcuma vitellina, C. singularis and pogang gan via DNA analysis (Van Tan & Vinh, 2015). Pogang gan (Curcuma sp.) contains higher contents of polyphenol, alkaloid, saponin than other species in the Curcuma genus, (good at heart operation and circulatory system and improves the people’s health (Van Tan & Vinh, 2015)). Among the species of the Curcuma genus, white turmeric (Curcuma zedoaria Rosc.) is planted popularly in Vietnam and has a great value and contains high content of alkaloid, polyphenol and flavonoid (Dutta, 2015)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
