Abstract: The present invention provides an in vitro flavonoid-rich rhizome tissue of Neomarica gracilis, which is obtained from a tissue culture preparation of an N. gracilis tissue capable of proliferating, such as a root, a leaf, a basal portion of a leaf, and/or a rhizome. The in vitro flavonoid-rich rhizome tissue of N. gracilis contains tectorigenin, which is distinctively different from the naturally grown rhizome of N. gracilis which contains no tectorigenin. The present invention further provides a method for cultivating the in vitro flavonoid-rich rhizome tissue, a method for extracting the tectorigenin from the flavonoid-rich rhizome tissue, and quantitative methods for determining the amount of tectorigenin in the in vitro flavonoid-rich rhizome tissue.

Abstract: The present invention provides an in vitro flavonoid-rich tissue of Belamcanda chinensis, which is produced in a tissue culture system using a B. chinensis tissue capable of proliferation, such as a seed, an embryo of said seed, a root, a leaf, a base of a leaf, or a young inflorescence of B. chinensis. The preferred in vitro flavonoid-rich tissue is a callus tissue or an fast-proliferated roots of B. chinensis which contain a very high content of flavonoid as compared to the wild type B. chinensis. The present invention further provides a method for inducing the formation of the callus tissue and the fast-proliferated roots of B. chinensis. It also provides a method for extracting the flavonoids and a quantitative method for determining the amount of total flavonoids from the in vitro flavonoid-rich tissue.

Abstract: The present invention provides an in vitro flavonoid-rich rhizome tissue of Neomarica gracilis, which is obtained from a tissue culture preparation of an N. gracilis tissue capable of proliferating, such as a root, a leaf, a basal portion of a leaf, and/or a rhizome. The in vitro flavonoid-rich rhizome tissue of N. gracilis contains tectorigenin, which is distinctively different from the naturally grown rhizome of N. gracilis which contains no tectorigenin. The present invention further provides a method for cultivating the in vitro flavonoid-rich rhizome tissue, a method for extracting the tectorigenin from the flavonoid-rich rhizome tissue, and quantitative methods for determining the amount of tectorigenin in the in vitro flavonoid-rich rhizome tissue.