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  Culture conditions affect fatty acid content along with wound-activated production of polyunsaturated aldehydes in Thalassiosira rotula (Coscinodiscophyceae)

Dittami, S. M., Wichard, T., Malzahn, A. M., Pohnert, G., Boersma, M., & Wiltshire, K. H. (2010). Culture conditions affect fatty acid content along with wound-activated production of polyunsaturated aldehydes in Thalassiosira rotula (Coscinodiscophyceae). Nova Hedwigia, 136(231), 231-248.

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EXT259.pdf (Publisher version), 715KB
 
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Dittami, Simon M., Author
Wichard, Thomas, Author
Malzahn, Arne M., Author
Pohnert, Georg1, Author           
Boersma, Maarten, Author
Wiltshire, Karen H., Author
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1External Organizations, ou_persistent22              

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Free keywords: DIATOM-COPEPOD INTERACTIONS; SHORT-CHAIN ALDEHYDES; ALPHA,BETA,GAMMA,DELTA-UNSATURATED ALDEHYDES; CHEMICAL DEFENSE; LIPID-COMPOSITION; MARINE DIATOMS; PSEUDOCALANUS-NEWMANI; CALANUS-HELGOLANDICUS; REPRODUCTIVE SUCCESS; SKELETONEMA-MARINOIPlant Sciences; diatoms; polyunsaturated aldehydes (PUAs); polyunsaturated fatty acids (PUFAs); nutrient limitation; octadienal;
 Abstract: The nutritional value of diatoms for grazers has been frequently addressed in experiments. However, little is known about the effects of culture conditions on the quality of algae as food for higher trophic levels. We examined the fatty acid composition of four different strains of the diatom Thalassiosira rotula under nitrate- and phosphate-limited conditions, in natural seawater, at different light intensities, in different growth phases, and with addition of low doses of octadienal. The same samples were tested for the production of fatty acid-derived polyunsaturated aldehydes (PUAs: heptadienal, octadienal, octatrienal, decadienal, decatrienal) that are reported to have negative effects on the hatching and survival of copepod offspring. Phosphate- and nitrate-limited cultures as well as those in the exponential growth phase under phosphate- and nitrate-replete conditions contained less eicosapentaenoic acid (EPA) and produced less PUA than algae cultured in non-limiting F/2 medium in the stationary and decline phases. Light intensity had no significant influence on either fatty acid composition or PUA production. We further show that addition of octadienal in methanol (0.02 mu M every second day) increased the potential wound-activated PUA production in the CCMP 1018 strain. Our findings also indicate that the production of decatrienal, the major PUA in T was related to the cell content of EPA.

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Language(s): eng - English
 Dates: 2010
 Publication Status: Published in print
 Pages: 18
 Publishing info: -
 Table of Contents: -
 Rev. Type: -
 Identifiers: Other: EXT259
 Degree: -

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Title: Nova Hedwigia
Source Genre: Journal
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Publ. Info: Weinheim/Bergstr. : H.R. Engelmann (J. Cramer)
Pages: - Volume / Issue: 136 (231) Sequence Number: - Start / End Page: 231 - 248 Identifier: ISSN: 0029-5035
CoNE: https://pure.mpg.de/cone/journals/resource/954925429288