Organ Differentiation of Different Explants of Ginkgo biloba in Vitro
An experiment was conducted to study the organ differentiation of Ginkgo biloba on different media using stem sections with bud and young leaves of aseptic seedlings, cotyledon and roots of mature embryos, annual twigs of female and male plants, and male pollens as explants. Result showed that the young stems from the aseptic seedlings induced 2 adventitious buds, while those from mature plants developed 2 or 3 adventitious buds, and the adventitious buds were directly regenerated. 2 adventitious buds were observed on cotyledons cultured on MS + NAA1.0 mg/L + KT2. 0 mg/L, and the plantlet could grow as high as 2 cm. Differentiated adventitious roots were induced from the 30-day-old leaves of aseptic seedlings on MS + NAA1.0 mg/L + BA1.0 mg/L and MS + NAA1. 0 mg/L + KT0. 5, and the highest rooting rate reached 40 percent. Adventitious roots could also develop on young leaves and immature male pollens.