Effects of the extract from Ginkgo biloba leaves extracted by supercritical fluid extraction on seed germination of Chinese fir

Authors Lin Sizu; Zhang Yanping; Cao Guangqiu; Du Ling; Wang Aiping

Journal Journal of Plant Resources and Environment , 2003,3:12

Abstract The extract of Ginkgo biloba L. leaves extracted by supercritical CO_2 fluid extraction under orthogonal experimental design L_8(2~7) was used to analysis allelopathic activity to Chinese fir [ Cunninghamia lanceolata (Lamb.) Hook.J through bioassay of seed germination of Chinese fir. The results showed the extract of G. biloba leaves extracted by different extraction conditions had different effects on seed germination. As far as RI value was concerned, the extract (200 mg/kg) of G. biloba leaves extracted by pure CO_2 had a positive effect on absolute germination rate, absolute germination power and plumular root length (The RI values were 0.23, 0. 15 and 0.01, respectively), but had the weakly inhibitory effect on plumular axis length (RI value was -0.02). The extract (200 mg/kg) of G, biloba leaves extracted by entrainer mixed with C02 had a positive effect on absolute germination rate and absolute germination power of Chinese fir (the RI values were 0.03 and 0.34, respectively) , but had a weakly inhibitory effect on plumular root length and plumular axis length (the RI values were -0.09 and -0.03, respectively).

Species covered 杉木 Cunninghamia lanceolata 银杏 Ginkgo biloba