Effects of silver nanoparticle on growth,photosynthetic pigment content and chlorophyll fluorescence parameter of Phaeodactylum Tricornutum
ZHANG Yunfei
LI Bin
LIU Caili
ZHANG Xinze
HU Yujun
GAO Jiqing
CHEN Lizhu
SUN Chunxiao
TIAN Xiuhui
HU Shunxin
Abstract：In recent years,the widespread application of silver nanoparticles(AgNPs)has inevitably led to their release into the surrounding environment,ultimately accumulating in nearshore waters through surface runoff.In order to understand the effects of AgNP on the growth and photosynthesis of marine microalgae,in this study,we selected Phaeodactylum tricornutum as the experimental object and in-vestigated the impact of AgNPs on the growth and photosynthesis of P.tricornutum under acute stress for 96 hours.The results showed that at an environmental concentration of 0.01 mg/L,AgNPs had no significant effects on the growth and photosynthesis of P.tricornutum.With the increase of AgNPs concentration,the growth of P.tricornutum was significantly inhibited(P＜0.05),and a dose-de-pendent relationship was observed.At 2 mg/L,the inhibition rate reached 69.57％,and at 4 mg/L,the growth of P.tricornutum was almost completely inhibited(inhibition rate,96.03％).The high concentration(4 mg/L)of AgNP affected the photosynthetic system of P.tricornutum with a signifi-cant decrease in the contents of chlorophyll a,chlorophyll c and carotenoids(45.3％,36.67％,and 54.47％),respectively.The maximum photochemical quantum yield(Fv/Fm),actual photochemical efficiency(YⅡ)and maximum relative electron transfer rate(rETRmax)in PSⅡ were also inhibited.These findings indicated that AgNPs at high concentrations can inhibit the growth and photosynthesis of P.tricornutum.
Keywords：Phaeodactylum tricornutumsilver nanoparticlephotosynthetic pigmentchlorophyll flu-orescence
Publication Date：2024-10-28
Online Publishing Date：2026-05-22(First online date of this platform, not the publication date of the document)
Pages：8( 103-110 )