Water deficit affected flavonoid accumulation by regulating hormone metabolism in ScutellariabaicalensisGeorgi roots

Author(s): Yuan Y, Liu Y, Wu C, Chen S, Wang Z, et al.


The content of flavonoids especially baicalin and baicalein determined the medical quality of Scutellaria baicalensis which is a Chinese traditional medicinal plant. Here, we investigated the mechanism responsible for the content and composition of flavonoids in S. baicalensis under water deficit condition. The transcription levels of several genes which are involved in flavonoid biosynthesis were stimulated by water deficit. Under water deficit condition, fifteen up-regulated proteins, three down-regulated proteins and other six proteins were detected by proteomic analysis. The identified proteins include three gibberellin (GA)- or indoleacetic acid (IAA)-related proteins. Decreased endogenous GAs level and increased IAA level were observed in leaves of S. baicalensis which was treated with water deficit. Exogenous application of GA or α-naphthalene acelic acid (NAA) to plants grown under water deficit conditions led to the increase of endogenous GAs and the decrease of IAA and flavonoids, respectively. When the synthesis pathway of GA or IAA in plants was inhibited by application with the inhibitors, flavonoid levels were recovered. These results indicate that water deficit affected flavonoid accumulation might through regulating hormone metabolism in S. baicalensis Georgi.

Similar Articles

Introduction of flavonoids

Author(s): Bohm B

Gene expression profiling of key enzymes in azalea flower colour biosynthesis

Author(s): De Keyser E, De Riek J, Van Bockstaele E

Molecular characterisation of flower colour genes in azalea sports (Rhododendron simsii hybrids)

Author(s): De Schepper S, Debergh P, Van Bocktaele E, De Loose M

Light intensity affects the growth and flavonol biosynthesis of Ginkgo (Ginkgo biloba L

Author(s): Xu Y, Wang G, Cao F, Zhu C, Wang G, YA El-Kassaby

Characterization and expression of chalcone synthase gene from Ginkgo biloba

Author(s): Pang YZ, Shen GA, Wu WS, Liu XF, Lin J, et al.

Light-induced vegetative anthocyanin pigmentation in Petunia

Author(s): Albert NW, Lewis DH, Zhang H, Irving LJ, Jameson PE, et al.