title: Fungal endophytes-induced abscisic acid is required for flavonoid accumulation in suspension cells of Ginkgo biloba.
abstract: Treatment of suspension cells of Ginkgo biloba with fungal endophytes resulted in accumulation of flavonoids, increased abscisic acid (ABA) production and activation of phenylalanine ammonia-lyase (PAL). Fluridone, an inhibitor of ABA biosynthesis, was effective in inhibiting fungal endophytes-induced ABA biosynthesis, increase of PAL activity and flavonoids accumulation. Moreover, exogenous application of ABA enhanced PAL activity and increased accumulation of flavonoids in G. biloba cells with or without fungal endophytes elicitor. These finding suggest a causal relationship between ABA release and both PAL activity and flavonoid accumulation under fungal endophytes treatment and that ABA is involved in fungal endophytes-induced flavonoids accumulation in this plant.
authors.affiliation: Department of Biochemistry, Taishan Medical University, 271000 Tai'an, People's Republic of China. haogangping@163.com
authors.forename: Gangping
authors.initials: G
authors.lastname: Hao
authors.forename: Xihua
authors.initials: X
authors.lastname: Du
authors.forename: Faxing
authors.initials: F
authors.lastname: Zhao
authors.forename: Haiwei
authors.initials: H
authors.lastname: Ji
mesh_terms: D000040:Abscisic Acid / Q000378:metabolism*; D001203:Ascomycota / Q000502:physiology*; D005419:Flavonoids / Q000378:metabolism*; D020441:Ginkgo biloba / Q000378:metabolism* / Q000382:microbiology*
chemical_list: D005419:Flavonoids; D000040:Abscisic Acid