Naslov
Coated silver nanoparticles affect germination and disrupt tobacco growth

Autori
Biba, Renata ; Cvjetko, Petra ; Tkalec, Mirta ; Lyons, Daniel Mark ; Peharec Štefanić, Petra ; Balen, Biljana

Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni

Izvornik
Zbornik sažetaka 13. hrvatskog biološkog kongresa = Book of abstracts of the 13th Croatian biological congress / Kružić, Petar ; Caput Mihalić, Katarina ; Gottstein, Sanja ; Pavoković, Dubravko ; Kučinić, Mladen - Zagreb : Hrvatsko biološko društvo, 2018, 205-206

Skup
13. Hrvatski biološki kongres

Mjesto i datum
Poreč, Hrvatska, 19.09.2018. - 23.09.2018

Vrsta sudjelovanja
Poster

Vrsta recenzije
Domaća recenzija

Ključne riječi
silver nanoparticles ; cysteine ; Nicotiana tabacum ; germination ; stress tolerance index

Sažetak
Silver nanoparticles (AgNPs) are being used in an ever increasing number of consumer products due to their excellent antibacterial and antifungal properties. Increased production will inevitably increase the potential for their release into the environment. Plants, as key components of biological systems, may serve as a potential pathway for AgNPs uptake, bioaccumulation and a route into the food chain. In this study we compared the effects of three differently coated AgNPs [citrate, polyvinylpyrrolidone (PVP) and cetyltrimethylammonium bromide (CTAB)], applied in three concentrations (25, 50 and 100 μM), on germination and early growth of tobacco (Nicotiana tabacum L.). AgNPs-citrate did not cause any significant changes in germination percentage, but the germination rate of plants treated with AgNPs-PVP and AgNPs-CTAB was significantly reduced. Root elongation and seedling growth were also negatively affected, resulting in reduction of fresh and dry mass and a decreased stress tolerance index. To examine whether the toxic effects of AgNPs-PVP and AgNPs-CTAB originate from dissolved Ag+ or nanoparticles themselves, 125, 250 and 500 μM of cysteine, a strong silver ligand, have been applied. Cysteine significantly reduced the harmful effects of AgNPs, thus showing that phytotoxicity of AgNPs at least partially derives from dissolved silver.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA