title: Induced carotenoid accumulation in Dunaliella salina and Tetraselmis suecica by plant hormones and UV-C radiation.
abstract: Carotenoids prevent different degenerative diseases and improve human health. Microalgae are commercially exploited for carotenoids, including astaxanthin and β-carotene. Two commercially important microalgae, Dunaliella salina and Tetraselmis suecica, were treated with plant hormones salicylic acid (SA) and methyl jasmonate (MJ), or by UV-C radiation (T. suecica only) and a combination thereof. Significant increases in total carotenoids were found for D. salina and T. suecica after treatment with MJ (10 μmol/L) and SA (70-250 μmol/L), respectively. T. suecica also had significant increases in total carotenoids following UV-C radiation compared to control cultures. Among the carotenoids, lutein was the highest induced carotenoid. A combination of these two treatments also showed a significant increase in total carotenoids and lutein for T. suecica, when compared to controls. Plant hormones and UV-C radiation may be useful tools for increasing carotenoid accumulation in green microalgae although the responses are species- and dose-specific and should be trialed in medium to large scale to explore commercial production.
authors.affiliation: Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia.
authors.forename: Faruq
authors.initials: F
authors.lastname: Ahmed
authors.affiliation: Department of Agriculture, Fisheries and Forestry (DAFF), Coopers Plains, QLD, 4108, Australia.
authors.forename: Kent
authors.initials: K
authors.lastname: Fanning
authors.affiliation: Centre for Nutrition and Food Sciences, Queensland Alliance for Agriculture and Food Innovation (QAAFI), The University of Queensland, Brisbane, QLD, 4072, Australia.
authors.forename: Michael
authors.initials: M
authors.lastname: Netzel
authors.affiliation: Algae Biotechnology Laboratory, School of Agriculture and Food Sciences, The University of Queensland, Brisbane, QLD, 4072, Australia. p.schenk@uq.edu.au.
authors.forename: Peer M
authors.initials: PM
authors.lastname: Schenk
mesh_terms: D000085:Acetates / Q000494:pharmacology; D000890:Anti-Infective Agents / Q000494:pharmacology; D002338:Carotenoids / Q000096:biosynthesis* / Q000737:chemistry; D000460:Chlorophyta / Q000737:chemistry / Q000187:drug effects / Q000378:metabolism* / Q000528:radiation effects; D003517:Cyclopentanes / Q000494:pharmacology; D014975:Lutein / Q000096:biosynthesis; D058086:Microalgae / Q000187:drug effects / Q000235:genetics / Q000378:metabolism* / Q000528:radiation effects; D054883:Oxylipins / Q000494:pharmacology; D010937:Plant Growth Regulators / Q000494:pharmacology; D020156:Salicylic Acid / Q000494:pharmacology; D014466:Ultraviolet Rays; D014871:Water Microbiology; D024341:Xanthophylls / Q000096:biosynthesis; D019207:beta Carotene / Q000096:biosynthesis
chemical_list: D000085:Acetates; D000890:Anti-Infective Agents; D003517:Cyclopentanes; D054883:Oxylipins; D010937:Plant Growth Regulators; D024341:Xanthophylls; D019207:beta Carotene; D002338:Carotenoids; C005948:astaxanthine; C072239:methyl jasmonate; D020156:Salicylic Acid; D014975:Lutein
keywords: Carotenoids; Methyl jasmonate; Microalgae; Salicylic acid; UV-C radiation