Effect of Silver Nanoparticles on Growth of Eukaryotic Green Algae

Nano-Micro Letters

Debabrata Dash¹  Sunil K. Singh¹  Bansh R. Chaudhary¹  Anjali Dash¹  Anand P. Singh¹ 

关键词: Silver nanoparticles;    Green algae;    Algal growth;    Photosynthetic pigment;    Nanotoxicity;   

DOI  :  10.3786/nml.v4i3.p158-165

来源: Open Access House of Science and Technology

【 摘 要 】

Silvernanoparticles,endowedwithpowerfulantimicrobialproperty,arethemostwidelyusednanomaterialinconsumerproducts,withassociatedriskoftheireasyaccesstoenvironmentandfreshwaterecosystemsbysurfacerunoff.Althoughtoxiceffectsofnanosilveronbacterial,fungalandmammaliancellshavebeendocumented,itsimpactonalgalgrowthremainsunknown.nbsp;Pithophoraoedogonianbsp;andnbsp;Charavulgarisnbsp;arepredominantmembersnbsp;ofphotosyntheticeukaryoticalgae,whichformmajorcomponentofglobalaquaticecosystem.Herewereportforthefirsttimethatnanosilverhassignificantadverseeffectsongrowthandmorphologyofthesefilamentousgreenalgaeinadose-dependentmanner.Exposureofalgalthallitoincreasingconcentrationsofsilvernanoparticlesresultedinprogressivedepletioninalgalchlorophyllcontent,chromosomeinstabilityandmitoticdisturbance,associatedwithmorphologicalmalformationsinalgalfilaments.SEMmicrographsrevealeddramaticalterationsincellwallinnanoparticle-treatedalgae,characterizedwithcellwallruptureanddegradationinnbsp;Pithophora.Althoughtheseobservationsunderscoreseveredeleteriouseffectsofnanosilveronaquaticenvironment,theinformationcanalsobeexploitedasabioengineeringstrategytocontrolunwantedandpersistentgrowthofnoxiousalgalweedsthatnbsp;clogthemunicipalwatersupplyandwaterchannelsandproducefoulingofwaterbodies.

【 授权许可】

Unknown