<正>通过应用ELISA法测定了光皮桦在芽增殖培养基（改良.MS+4.5mg/LBA+O.01mg/LNAA）和生根培养基（改良WH+3.Omg/LIBA+1.5mg/LNAA）上形态建成过程中内源激素的变化，阐明外源激素和内源激素的影响对离体培养形态建成过程中所起的调控作用。结果表明：在形态建成过程中，外源激素的添加使光皮桦某些内源激素发生了变化，从而对芽和根的形态建成起调控作用；内源激素ZR、ABA、IAA、iPA的增加对芽的形成、发育起到促进作用；内源激素IAA、ABA、iPA的增加对根的形成、发育起到促进作用。

Effects of light spectrum and photoperiod on contents of flavonoid and terpene in leaves of Ginkgo biloba L. were studied based on the field experiments and pot experiments. Light spectrum affected the contents of flavonoid and terpene, the photosynthetic rate, PAL activity, and relative stem growth. Long wavelength such as red light did not favour the accumulation of flavoniod and terpene, but promoted the growth of Ginkgo biloba. Short wavelength increased the accumulation of flavoniod and terpene. However it decreased the growth of Ginkgo biloba. Photoperiod had no significant effects on the content of flavonoid and terpene in leaves of Ginkgo biloba. Short light period did not favour the photosynthetic rate and relative growth, while long light period was favourable. The results from this research provided some bases for the management of Ginkgo biloba plantations.