| UV-A Mediated Modulation of Photosynthetic Efficiency, Xanthophyll Cycle and Fatty Acid Production of Nannochloropsis. | |
| | |
MedLine Citation:
|
PMID: 20640472 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
|
Nannochloropsis, a green microalga, is a source for commercially valuable compounds as extensively described and, in particular, is recognised as a good potential source of eicosapentaenoic acid (20:5ϖ3), an important polyunsaturated fatty acid for human consumption for prevention of several diseases. Climate change might include variation in the ultraviolet (UV) levels as one of the consequences derived from the anthropogenic activity. This paper shows the response of Nannochloropsis cultures exposed for 7 days to UV-A (320-400 nm) added to photosynthetically active radiation (PAR; 400-700 nm). Growth rates and photosynthetic activity were assessed to determine the impact of UV-A increased levels on the cell growth and basic metabolism activity. Xanthophyll pigments (zeaxanthin and violaxanthin), carotenoids (canthaxanthin and β-carotene) and polyunsaturated fatty acids (myristic, palmitic, palmitoleic, arachidonic and eicosapentaenoic acids) were measured for assessing the antioxidant response of the microalgae to added UV-A radiation to PAR. The results show that the modulated use of UV-A radiations can lead to increased growth rates, which are sustained in time by an increased light transduction activity. The expected antioxidant response to the incident UV-A radiation consisted of increases in zeaxanthin and β-carotene contents-synthesis of antioxidant carotenoids-and increases in the saturated fatty acids to polyunsaturated fatty acids ratio. The results suggest that modulated UV-A radiation can be used as a tool to stimulate value molecules accumulation in microalgae through an enhanced both light transduction process and antioxidant response, while sustaining cell growth. |
| | |
Authors:
|
Eduardo Forján; Inés Garbayo; Marta Henriques; Jorge Rocha; José M Vega; Carlos Vílchez |
Publication Detail:
|
Type: Journal Article Date: 2010-07-17 |
Journal Detail:
|
Title: Marine biotechnology (New York, N.Y.) Volume: 13 ISSN: 1436-2236 ISO Abbreviation: Mar. Biotechnol. Publication Date: 2011 Jun |
Date Detail:
|
Created Date: 2011-06-01 Completed Date: - Revised Date: - |
Medline Journal Info:
|
Nlm Unique ID: 100892712 Medline TA: Mar Biotechnol (NY) Country: United States |
Other Details:
|
Languages: eng Pagination: 366-75 Citation Subset: IM |
Affiliation:
|
Facultad de Ciencias Experimentales, Algal Biotechnology Group, Universidad de Huelva, Avda Tres de Marzo s/n, 21071, Huelva, Spain. |
Export Citation:
|
APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
|
|
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
Previous Document: Laser phototherapy in the treatment of periodontal disease. A review.
Next Document: Invited comment to the letter by K. Bielecki "Recurrent ileostomy prolapse: is it a solved problem?"...