Ru Zhang1, Bian-Ling Zhang2, Gu-Cai Li1, Tao Xie1, Teng Hu1, Zhi-Yong Luo3. 1. College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China. 2. College of Chemistry and Chemical Engineering, Hunan Institute of Engineering, Xiangtan, 411104, China. blzhang369@163.com. 3. Molecular Biology Research Center, School of Life Sciences, Central South University, Changsha, 410078, China.
Abstract
OBJECTIVES: To improve the production of ginsenoside Rg1 in Panax ginseng. RESULTS: The α-L-rhamnosidase gene from Bifidobacterium breve (BbRha) was overexpressed into hairy root culture system using Agrobacterium rhizogenes A4. Ginsenoside Rg1 in hairy roots was obtained following transformation via overexpressed gene representing 2.2-fold higher than those of control lines. Several overexpression transgenic hairy root lines were obtained exhibiting markedly increased levels of the corresponding α-L-rhamnosidase enzymatic activity relative to control. Ginsenoside Rg1 levels in the transgenic lines were higher (2.2-fold) than those of control after following 30 days culturing, while ginsenoside Re contents in tested transgenic lines were found to be lower. The transgenic hairy roots harboring α-L-rhamnosidase gene improved the accumulation of ginsenoside Rg1 up to 3.6 mg g(-1) dry weight. CONCLUSION: BbRha gene selectively enhances the production of ginsenoside Rg1 in P. ginseng hairy roots.
OBJECTIVES: To improve the production of ginsenoside Rg1 in Panax ginseng. RESULTS: The α-L-rhamnosidase gene from Bifidobacterium breve (BbRha) was overexpressed into hairy root culture system using Agrobacterium rhizogenes A4. Ginsenoside Rg1 in hairy roots was obtained following transformation via overexpressed gene representing 2.2-fold higher than those of control lines. Several overexpression transgenic hairy root lines were obtained exhibiting markedly increased levels of the corresponding α-L-rhamnosidase enzymatic activity relative to control. Ginsenoside Rg1 levels in the transgenic lines were higher (2.2-fold) than those of control after following 30 days culturing, while ginsenoside Re contents in tested transgenic lines were found to be lower. The transgenic hairy roots harboring α-L-rhamnosidase gene improved the accumulation of ginsenoside Rg1 up to 3.6 mg g(-1) dry weight. CONCLUSION: BbRha gene selectively enhances the production of ginsenoside Rg1 in P. ginseng hairy roots.
Authors: José A Morales-Contreras; Jessica E Rodríguez-Pérez; Carlos A Álvarez-González; Mirian C Martínez-López; Isela E Juárez-Rojop; Ángela Ávila-Fernández Journal: Food Sci Biotechnol Date: 2021-08-03 Impact factor: 3.231