Naslov
Effects of different nitrogen and phosphorus concentration on antioxidative response of Lemna gibba plants to silver toxicity

Autori
Varga, Martina ; Štolfa, Ivna ; Horvatić, Janja

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

Izvornik
Book of Abstracts/2nd International Conference on Plant Biology and 21st Symposium of the Serbian Plant Physiology Society and COST Action FA1106 QualityFruit Workshop / Branka Uzelac - Beograd : Serbian Plant Physiology Society ; Institute for Biological Research Siniša Stanković ; Biološki fakultet Univerziteta u Beogradu, 2015, 186-186

ISBN
978-86-912591-3-6

Skup
2nd International Conference on Plant Biology 21st Symposium of the Serbian Plant Physiology Society COST ACTION FA1106 QUALITYFRUIT Workshop

Mjesto i datum
Petnica, Srbija, 17.06.2015. - 20.06.2015

Vrsta sudjelovanja
Poster

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Lemna gibba; silver; nutrients; oxidative stress; antioxidative response

Sažetak
Silver is non-essential heavy metal for plants known to cause oxidative stress. Several factors, such as the presence of nutrients, can affect the ability of plants to adequately respond to abiotic stress. The objective of this study was to investigate the effect of different nitrogen (N) and phosphorus (P) concentration on antioxidative response of plants to ionic colloidal silver (Ag). To provide insight, Lemna gibba plants were exposed to three N and P levels (100, 50 and 25%) for seven days and then to nominal 100 and 1000 μg/L Ag for 48h. Plants grown at lower N and P concentrations had significantly higher initial enzyme activities such as ascorbate peroxidase (APX), guaiacol peroxidase (GPOX) and superoxide dismutase (SOD) as well as elevated concentrations of ascorbic acid and total phenols. Increased antioxidative enzymes activities indicate oxidative stress-tolerance. Silver caused oxidative injury to L. gibba cells, evident from decreased protein and chlorophyll concentrations and increased concentrations of hydrogen peroxide (H2O2) and products of lipid peroxidation (TBARS). However, the production of H2O2 and TBARS as well as the degradation of proteins and pigments caused by Ag treatment was less pronounced in plants grown at lower N and P concentrations when compared to full strength medium. This could be explained by higher degree of protection from oxidative stress caused by Ag in plants grown at lower N and P supply. These results indicate that N and P supply, by modifying antioxidant activity in plants, can affect their tolerance to various kinds of stresses.

Izvorni jezik
Engleski

Znanstvena područja
Biologija

POVEZANOST RADA