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1、Biotechnology3(1):102-108,2004ISSN1682-2978©2004AsianNetworkforScientificInformationProductionofLipidsRichinOmega3FattyAcidsfromtheHalotolerantAlgaDunaliellasalina112HanaaH.AbdEl-Baky,FaroukK.ElBazandGamalS.El-Baroty1AgriculturalDivision,NationalResearchCenter,Dokki,Cairo,Egypt2DepartmentofB
2、iochemistry,FacultyofAgriculture,CairoUniversity,EgyptAbstract:TheeffectofnitrogenlimitationandsaltstressontotallipidandunsaponifiablecontentsaswellasfattyacidcompositionofDunaliellasalinawerestudied.Thecontentsoftotallipids,unsaponifiablesandfattyacidcompositionwerebasicallydependonNaClandn
3、itrogenconcentrationintheculture.Thehighestyieldoftotallipids(37.69%)andunsaponifiables(29.02%)wasobtainedincellsgrownat16%NaClcombinedwith2.5mMnitrogen.While,minimumyieldoccurredincellsgrowninaculturecontaining8%NaCland5mMN.Cellsgrownat16%NaClcombinedwith2.5mMNproducedrelativelyhigherpropor
4、tionofpolyunsaturatedfattyacids(PUFAs),inparticularC18:3T3andC16:4T3.IncreasingNaClcombinedwithdecreasingNlevelsinthegrowthmediumincreasedthetotalunsaturatedfattyacids(TU)attheexpenseoftotalsaturatedfattyacids.Athighersalinity,thetotalamountsofcarotenoidsand"-tocopherolinunsaponifiablefracti
5、onweresignificantlyincreasedtoreachingupto12.03and4.10%.TheresultsobtainedsuggestthatD.salinacellscontaininghighamountoftotallipid,richinT3polyunsaturatedfattyacidsandantioxidantcompoundsinunsaponifiablelipidfractionmayusedasasupplementalingredientorasacompletefoodtoenhancetheperformanceands
6、tateofthehumanbodyorimproveaspecificbodilyfunction.Keywords:Dunaliellasalina,nitrogen,saltstress,fattyacids,T3polyunsaturatedfattyacids[11]INTRODUCTIONofeicosanoidsformation.Eicosapentaenoicacid(EPA)playsanimportantroleinmammalsasanagenttoprevent[12-14]Severalofunicellularalgae,e.g.,Chlorell
7、a,bloodplateletaggregation.DocosahexaenoicacidDunaliellaandSpirullinaaccumulateappreciable[DHA,C22:6T3]isimportantforthereceptionand[15]amountoffat(upto60%ofdryweightbasis)whengrowntransmissionofimpulsesbetweenbraincells.undercertainenvironmentalco
