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Original scientific paper

Overexpression of Phenylalanine Ammonia-Lyase in Transgenic Roots of Coleus blumei Alters Growth and Rosmarinic Acid Synthesis

Nataša Bauer ; Department of Molecular Biology, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia
Hrvoje Fulgosi ; Department of Molecular Biology, Ruđer Bošković Institute, Bijenička 54, HR-10000 Zagreb, Croatia
Sibila Jelaska ; Department of Molecular Biology, Faculty of Science, University of Zagreb, Horvatovac 102a, HR-10000 Zagreb, Croatia

Fulltext: english, pdf (427 KB) pages 24-31 downloads: 1.658* cite
APA 6th Edition
Bauer, N., Fulgosi, H. & Jelaska, S. (2011). Overexpression of Phenylalanine Ammonia-Lyase in Transgenic Roots of Coleus blumei Alters Growth and Rosmarinic Acid Synthesis. Food Technology and Biotechnology, 49 (1), 24-31. Retrieved from https://hrcak.srce.hr/65513
MLA 8th Edition
Bauer, Nataša, et al. "Overexpression of Phenylalanine Ammonia-Lyase in Transgenic Roots of Coleus blumei Alters Growth and Rosmarinic Acid Synthesis." Food Technology and Biotechnology, vol. 49, no. 1, 2011, pp. 24-31. https://hrcak.srce.hr/65513. Accessed 3 Dec. 2021.
Chicago 17th Edition
Bauer, Nataša, Hrvoje Fulgosi and Sibila Jelaska. "Overexpression of Phenylalanine Ammonia-Lyase in Transgenic Roots of Coleus blumei Alters Growth and Rosmarinic Acid Synthesis." Food Technology and Biotechnology 49, no. 1 (2011): 24-31. https://hrcak.srce.hr/65513
Harvard
Bauer, N., Fulgosi, H., and Jelaska, S. (2011). 'Overexpression of Phenylalanine Ammonia-Lyase in Transgenic Roots of Coleus blumei Alters Growth and Rosmarinic Acid Synthesis', Food Technology and Biotechnology, 49(1), pp. 24-31. Available at: https://hrcak.srce.hr/65513 (Accessed 03 December 2021)
Vancouver
Bauer N, Fulgosi H, Jelaska S. Overexpression of Phenylalanine Ammonia-Lyase in Transgenic Roots of Coleus blumei Alters Growth and Rosmarinic Acid Synthesis. Food Technology and Biotechnology [Internet]. 2011 [cited 2021 December 03];49(1):24-31. Available from: https://hrcak.srce.hr/65513
IEEE
N. Bauer, H. Fulgosi and S. Jelaska, "Overexpression of Phenylalanine Ammonia-Lyase in Transgenic Roots of Coleus blumei Alters Growth and Rosmarinic Acid Synthesis", Food Technology and Biotechnology, vol.49, no. 1, pp. 24-31, 2011. [Online]. Available: https://hrcak.srce.hr/65513. [Accessed: 03 December 2021]

Abstracts
Most natural phenolic compounds in plants are derived from trans-cinnamic acid, formed by the nonoxidative deamination of L-phenylalanine by phenylalanine ammonia-lyase (EC 4.3.1.24). Although a strict line between primary and secondary metabolism cannot be drawn, phenylalanine ammonia-lyase is considered to play a pivotal role in channelling carbon flux from primary metabolism to phenolic synthesis. The objective of this work is to evaluate the impact of phenylalanine ammonia-lyase activity on phenolic production in Coleus blumei. Transgenic roots of C. blumei, harbouring the Arabidopsis thaliana PAL1 gene, under the control of the CaMV 35S promoter, along with empty vector and wild-type
roots, were regenerated. Transgenic root lines had disparate phenylalanine ammonia-lyase activities ranging from 67 to 350 %, compared to wild-type roots. Growth rates significantly differed, with the lowest in transgenic roots exerting augmented phenylalanine ammonia-lyase activity. Transgenic roots with high phenylalanine ammonia-lyase activity had lower growth rates, lower amounts of total phenolics, rosmarinic acid (the major phenolic compound in C. blumei) and chlorogenic acid, but increased amounts of caffeic acid. There was no increase in total phenolics and rosmarinic acid content after feeding transgenic roots with casein enzymatic hydrolysate and L-tyrosine. This shows that augmented phenylalanine ammonia-lyase activity inhibits growth and phenolic metabolism, and the probable regulator of these processes is trans-cinnamic acid.

Keywords
caffeic and rosmarinic acid; Coleus blumei; overexpression; phenolics; phenylalanine ammonia-lyase; transgenic roots

Hrčak ID: 65513

URI
https://hrcak.srce.hr/65513

[croatian]

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