Elicitors directed in vitro growth and production of stevioside and other secondary metabolites in Stevia rebaudiana (Bertoni) Bertoni
文献类型: 外文期刊
作者: Ghazal, Bushra 1 ; Fareed, Amna 1 ; Ahmad, Nisar 2 ; Azra 3 ; Salmen, Saleh H. 4 ; Ansari, Mohammad Javed 5 ; Zeng, Yawen 6 ; Farid, Abid 7 ; Jenks, Matthew A. 8 ; Qayyum, Abdul 9 ;
作者机构: 1.Univ Agr Peshawar, Inst Biotechnol & Genet Engn, Peshawar 25120, Pakistan
2.Univ Swat, Ctr Biotechnol & Microbiol, Swat 19200, Pakistan
3.Univ Agr, Dept Plant Pathol, Amir Muhammad Khan Campus Mardan, Peshawar, Pakistan
4.King Saud Univ, Coll Sci, Dept Bot & Microbiol, POB 2455, Riyadh 11451, Saudi Arabia
5.Mahatma Jyotiba Phule Rohilkhand Univ, Dept Bot, Hindu Coll Moradabad, Bareilly 244001, India
6.Yunnan Acad Agr Sci, Biotechnol & Germplasm Resources Inst, Agr Biotechnol Key Lab Yunnan Prov, Key Lab Southwestern Crop Gene Resources & Germpl, Kunming 650205, Yunnan, Peoples R China
7.Univ Haripur, Dept Entomol, Haripur 22620, Pakistan
8.Univ Arizona, Coll Agr & Life Sci, Sch Plant Sci, Tucson, AZ 85721 USA
9.Univ Haripur, Dept Agron, Haripur 22620, Pakistan
关键词: Abiotic stress; Antioxidant; Growth regulators; Proline; Tissue culture
期刊名称:SCIENTIFIC REPORTS ( 影响因子:3.8; 五年影响因子:4.3 )
ISSN: 2045-2322
年卷期: 2024 年 14 卷 1 期
页码:
收录情况: SCI
摘要: Stevia rebaudiana (stevia) is a plant in the Asteraceae that contains several biologically active compounds including the antidiabetic diterpene glycosides (e.g. stevioside, rebaudioside and dulcoside) that can serve as zero-calorie sugar alternatives. In this study, an elicitation strategy was applied using 5% polyethylene glycol (PEG), sodium chloride (NaCl; 50 and 100 mM) and gibberellic acid (2.0 and 4.0 mg/L GA(3)) to investigate their effect on shoot morphogenesis, and the production of phenolics, flavonoids, total soluble sugars, proline and stevioside, as well as antioxidant activity, in shoot cultures of S. rebaudiana. Herewith, the media supplemented with 2 mg/L and 4 mg/L GA(3) exhibited the highest shooting response (87% and 80%). The augmentation of lower concentrations of GA(3) (2 mg/L) in combination with 6-benzylaminopurine (BAP) resulted in the maximum mean shoot length (11.1 cm). The addition of 100 mM NaCl salts to the media led to the highest observed total phenolics content (TPC; 4.11 mg/g-DW compared to the control 0.52 mg/g-DW), total flavonoids content (TFC; 1.26 mg/g-DW) and polyphenolics concentration (5.39 mg/g-DW) in shoots cultured. However, the maximum antioxidant activity (81.8%) was observed in shoots raised in media treated with 50 mM NaCl. The application of 2 mg/L of GA(3) resulted in the highest accumulation of proline (0.99 mu g/mL) as compared to controls (0.37 mu g/mL). Maximum stevioside content (71 mu L/mL) was observed in cultures supplemented with 100 mM NaCl and 5% PEG, followed by the 4 mg/L GA(3) treatment (70 mu L/mL) as compared to control (60 mu L/mL). Positive correlation was observed between GA(3) and stevioside content. Notably, these two compounds are derived from a shared biochemical pathway. These results suggest that elicitation is an effective option to enhance the accumulation of steviosides and other metabolites and provides the groundwork for future industrial scale production using bioreactors.
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