1
|
Shahnawaz, Pandey DK, Konjengbam M, Dwivedi P, Kaur P, Kumar V, Ray D, Ray P, Nazir R, Kaur H, Parida S, Dey A. Biotechnological interventions of in vitro propagation and production of valuable secondary metabolites in Stevia rebaudiana. Appl Microbiol Biotechnol 2021; 105:8593-8614. [PMID: 34708277 DOI: 10.1007/s00253-021-11580-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 09/08/2021] [Accepted: 09/10/2021] [Indexed: 10/20/2022]
Abstract
Plant cell and tissue culture makes provision of a sustainable and nature-friendly strategy for the production of secondary metabolites, and modern progress in gene editing and genome engineering provides novel possibilities to improve both the qualitative and quantitative aspects of such phytochemicals. The ever-expanding quest for plant-based medicine to treat diabetes facilitates large-scale cultivation of Stevia rebaudiana to enhance the yield of its much-coveted low-calorie sweetener glycosides. The potential to process stevia as a "natural" product should enhance the acceptance of steviosides as a natural calorie-free sweetener especially suitable for use in diabetic and weight control drinks and foods. Besides sweetener agents, S. rebaudiana is a potent source of many antioxidant compounds and is used to cure immunodeficiencies, neurologic disorders, inflammation, diabetes mellitus, Parkinson's disease, and Alzheimer's disease. This comprehensive review presents the research outcomes of the many biotechnological interventions implicated to upscale the yield of steviol glycosides and its derivatives in in vitro cell, callus, tissue, and organ cultures with notes on the use of bioreactor and genetic engineering in relation to the production of these valuable compounds in S. rebaudiana. KEY POINTS: • Critical and updated assessment on sustainable production of steviol glycosides from Stevia rebaudiana. • In vitro propagation of S. rebaudiana and elicitation of steviol glycosides production. • Genetic fidelity and diversity assessment of S. rebaudiana using molecular markers.
Collapse
Affiliation(s)
- Shahnawaz
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, India
| | - Devendra Kumar Pandey
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, India.
| | | | - Padmanabh Dwivedi
- Department of Plant Physiology, Institute of Agricultural Sciences, Banaras Hindu University, Varanasi, Uttar Pradesh, India
| | - Prabhjot Kaur
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, India
| | - Vijay Kumar
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, India
| | - Durga Ray
- Department of Microbiology, St. Aloysius College, Jabalpur, Madhya Pradesh, India
| | - Puja Ray
- Department of Life Sciences, Presidency University, Kolkata, West Bengal, India
| | - Romaan Nazir
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, India
| | - Harmeet Kaur
- Department of Biotechnology, Lovely Professional University, Phagwara, Punjab, India
| | - Sidharth Parida
- Department of Biotechnology, MITS School of Biotechnology, Affiliated to Utkal University, Bhubaneswar, Odisha, India
| | - Abhijit Dey
- Department of Life Sciences, Presidency University, Kolkata, West Bengal, India.
| |
Collapse
|
2
|
Wu Q, La Hovary C, Chen HY, Li X, Eng H, Vallejo V, Qu R, Dewey RE. An Efficient Stevia rebaudiana Transformation System and In vitro Enzyme Assays Reveal Novel Insights into UGT76G1 Function. Sci Rep 2020; 10:3773. [PMID: 32111874 DOI: 10.1038/s41598-020-60776-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 02/17/2020] [Indexed: 11/08/2022] Open
Abstract
Stevia rebaudiana (Bertoni) is one of a very few plant species that produce zero calorie, sweet compounds known as steviol glycosides (SG). SGs differ in their sweetness and organoleptic properties depending on the number and positioning of sugar groups on the core steviol backbone. There is great interest of modulating the SG profiles of the Stevia plant to enhance the flavor profile for a given application in the food and beverage industries. Here, we report a highly efficient Agrobacterium-mediated stable transformation system using axillary shoots as the initial explant. Using this system, we generated over 200 transgenic Stevia plants overexpressing a specific isoform of UGT76G1. By comparing the SG profiles among independent transgenic events, we demonstrated that altering UGT76G1 expression can change the ratios of specific SG species. Furthermore, using recombinant proteins produced in E. coli, we show that two closely related UGT76G1 isoforms differ in their substrate specificities, providing new insights into mechanisms underlying the diversity of SG profiles that are observed across Stevia germplasm. Finally, we found evidence suggesting that alternative and/or aberrant splicing may serve to influence the ability of the plant to produce functional UGT76G1 transcripts, and possibly produce enzyme variants within the plant.
Collapse
|
3
|
Krishna H, Alizadeh M, Singh D, Singh U, Chauhan N, Eftekhari M, Sadh RK. Somaclonal variations and their applications in horticultural crops improvement. 3 Biotech 2016; 6:54. [PMID: 28330124 PMCID: PMC4752953 DOI: 10.1007/s13205-016-0389-7] [Citation(s) in RCA: 92] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2015] [Accepted: 10/20/2015] [Indexed: 01/07/2023] Open
Abstract
The advancements made in tissue culture techniques has made it possible to regenerate various horticultural species in vitro as micropropagation protocols for commercial scale multiplication are available for a wide range of crops. Clonal propagation and preservation of elite genotypes, selected for their superior characteristics, require high degree of genetic uniformity amongst the regenerated plants. However, plant tissue culture may generate genetic variability, i.e., somaclonal variations as a result of gene mutation or changes in epigenetic marks. The occurrence of subtle somaclonal variation is a drawback for both in vitro cloning as well as germplasm preservation. Therefore, it is of immense significance to assure the genetic uniformity of in vitro raised plants at an early stage. Several strategies have been followed to ascertain the genetic fidelity of the in vitro raised progenies comprising morpho-physiological, biochemical, cytological and DNA-based molecular markers approaches. Somaclonal variation can pose a serious problem in any micropropagation program, where it is highly desirable to produce true-to-type plant material. On the other hand, somaclonal variation has provided a new and alternative tool to the breeders for obtaining genetic variability relatively rapidly and without sophisticated technology in horticultural crops, which are either difficult to breed or have narrow genetic base. In the present paper, sources of variations induced during tissue culture cycle and strategies to ascertain and confirm genetic fidelity in a variety of in vitro raised plantlets and potential application of variants in horticultural crop improvement are reviewed.
Collapse
Affiliation(s)
- Hare Krishna
- ICAR-Central Institute for Arid Horticulture, Beechwal, Bikaner, Rajasthan, 334 006, India.
| | - Mahdi Alizadeh
- Department of Horticulture, Faculty of Agriculture, Gorgan University of Agricultural Sciences and Natural Resources (GUASNR), Golestan, Gorgan, Iran
| | - Dhurendra Singh
- ICAR-Central Institute for Arid Horticulture, Beechwal, Bikaner, Rajasthan, 334 006, India
| | - Udayvir Singh
- ICAR-Central Institute for Arid Horticulture, Beechwal, Bikaner, Rajasthan, 334 006, India
| | - Nitesh Chauhan
- ICAR-Central Institute for Arid Horticulture, Beechwal, Bikaner, Rajasthan, 334 006, India
| | - Maliheh Eftekhari
- Department of Horticulture, Faculty of Agriculture, Gorgan University of Agricultural Sciences and Natural Resources (GUASNR), Golestan, Gorgan, Iran
| | - Radha Kishan Sadh
- ICAR-Central Institute for Arid Horticulture, Beechwal, Bikaner, Rajasthan, 334 006, India
| |
Collapse
|