{"refrec":{"BRefID":330910,"RR":"<b>Latsos, C.; van Houcke, J.; Timmermans, K.R.</b> (2020). The Effect of Nitrogen Starvation on Biomass Yield and Biochemical Constituents of <i>Rhodomonas</i> sp. <i>Front. Mar. Sci. 7</i>: 900. <a href=\"https://doi.org/10.3389/fmars.2020.563333\" target=\"_blank\">https://doi.org/10.3389/fmars.2020.563333</a>","BEntID":324521,"PublicFlag":1,"CheckedFlag":0,"wosflag":1,"vabbflag":0,"RefStringPartII":" <i>Front. Mar. Sci. 7</i>: 900. <a href=\"https://doi.org/10.3389/fmars.2020.563333\" target=\"_blank\">https://doi.org/10.3389/fmars.2020.563333</a>","DocTypID":8,"DocType":"Journal article","MarineFlag":0,"FreshFlag":0,"BrackishFlag":0,"TerrestrialFlag":0,"Authorstring":"Latsos, C.; van Houcke, J.; Timmermans, K.R.","OrigTitleTranslFlag":0,"Authorstringtrunc":"Latsos, C.; van Houcke, J.; Timmermans, K.R.","Englishabstract":"The microalgae <i>Rhodomonas</i> sp. is known as an excellent feed sourcefor live feed organisms such as copepods. The main benefits of feeding <i>Rhodomonas</i> to live feed animals are attributed to the relative high polyunsaturated fatty acid (PUFA) level, the combination of containing both docosahexaenoic acid (DHA) and eicosapentaenoic acid (EPA), and the ratio between these fatty acids (FA). It has been shown that microalgae are able to accumulate valuable metabolites, such as lipids, under adverse conditions. The easiest and most inexpensive method to induce stress to microalgae is through nitrogen (N) starvation. In this study, the effect of N-starvation on biomass concentration, cell volume, and cellular composition, such as fatty acid concentration and composition, and phycoerythrin (PE) concentration of <i>Rhodomonas</i> sp. during a period of 8 days, was investigated. The research was divided into two stages. In the first (growth) stage, <i>Rhodomonas</i> sp. was cultivated in small 400 ml photobioreactors (Algaemist-S) under optimal conditions in turbidostat mode, which reached a biomass concentration of 1.5 gDW L<sup>–1</sup> and    dilution rate of 1.3 d<sup>–1</sup>. Samples were taken every 24 h for cell density and volume and productivity measurements in order to ensure a healthy and stable culture. In the next stage (N-starvation), the biomass was washed and transferred in a reactor filled with N-depleted medium. During N-starvation, samples were taken for biomass concentration, cell volume, PE and FA composition. The results of this study demonstrate thatthe lipid content increased significantly from 9% (<i>t</i> = 0 h) to 30% (<i>t</i> = 120 h) of the dry weight. After 120 h of N-starvation, the total FA content of <i>Rhodomonas</i> sp. remained stable for the remainder of the experiment (next 72 h). The highest increase of the FA concentration was represented by C16:0, C:18:1, C18:2, and C18:3, with highest concentrations after 120 h of starvation. The maximum EPA and DHA concentrations were observed after 48 h of starvation, while the maximum DHA to EPA ratio was detected at the end of the starvation.","AbstractOtherLang":null,"BibLvlCode":"AS","StandardTitle":"The Effect of Nitrogen Starvation on Biomass Yield and Biochemical Constituents of <i>Rhodomonas</i> sp.","OrigTitleLangCode":"en","OrigTitleLangCodeExtended":"eng","OrigTitleLangID":15,"DateLastModified":{"date":"2026-04-19 01:32:08.345204","timezone_type":1,"timezone":"+02:00"},"UserAccessRight":null,"UserAccID":null,"AuthorKeywords":"<i>Rhodomonas</i> sp.; nitrogen starvation; cell volume; fatty acids; phycoerythrin; PUFA; DHA; EPA","OtherDescriptors":null,"Notes":null,"AnaPub":2020,"MonPub":null,"DateUpdate":"2020-11-13","DateCreate":"2020-11-13","SecASFANote":null,"ConfID":null,"PeerRev":1,"VlizCoreFlag":1,"WoScode":"WOS:000581132700001","VABBcode":null,"OpenAcc":1,"DOI":"10.3389/fmars.2020.563333"},"refs":null,"anarec":{"AnaID":330910,"PubliDate":2020,"Pagination":"900","XtraPublOfAnaID":null,"ISBN":null,"Volume":"7","Issue":null,"BRefMon":null,"BRefMonRR":null,"BRefXtra":null,"BRefXtraRR":null,"SerBRefID":233602,"SerRR":"Frontiers in Marine Science. 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