Selenium improves the antioxidant ability against aluminium‐induced oxidative stress in ryegrass roots

Abstract

We investigated the role of selenium (Se) against aluminium (Al) stress in ryegrass by evaluating the growth responses and the antioxidant properties of plants cultured hydroponically with Al (0 or 0.2 mM) and selenite (0–10 µM Se). Al addition significantly reduced the yield and length of shoots and roots, and most Al was accumulated in the roots. Al also enhanced lipid peroxidation and activated the peroxidase (POD), ascorbate peroxidase (APX) and superoxide dismutase (SOD) enzymes in the roots. Se application up to 2 µM improved root growth and steadily decreased thiobarbituric acid reactive substances (TBARS) accumulation in plants treated with 0 and 0.2 mM Al. However, above 2 µM, Se induced stress in plants grown with or without Al. Significant changes in antioxidant enzymes activities were also found as a result of the added Se. At low Se addition levels POD was activated, whereas APX activity decreased irrespective of added Al. Furthermore, Se supplied up to 2 µM greatly decreased root SOD activity in Al‐stressed plants. Our study provides evidence that Se alleviated the Al‐induced oxidative stress in ryegrass roots through the enhancement of the spontaneous dismutation of superoxide radicals and the subsequent activation of POD enzyme.

Biochemical and histological characterization of tomato mutants

“…This has significantly contributed to the understanding of the relationship between tomato plants and environmental stress, such as high-light (Wang et al 2010), salt (Monteiro et al 2011), drought (Fischer et al 2011), temperature (Page et al 2010 and metal (Gratão et al 2008, Cartes et al 2010 stress as well as pathogens and diseases (Song et al 2011). Due to a relatively compact genome (950 Mb) combined with a marker-saturated genetic linkage map (Sol Genomics Network), rich germoplasm collections (Tomato Genetics Resource Center) and highly efficient transformation (Pino et al 2010), a lot of information is available for this plant species, especially at the molecular level.…”

Effect of drought stress and selenium spraying on photosynthesis and antioxidant activity of spring barley / Učinek sušnega stresa in škropljenja s selenom na fotosintezo in antioksidativno aktivnost jarega ječmena

“…Moreover, some plant species grown in Se-enriched media have shown enhanced resistance to certain abiotic stresses, e.g. drought (Kuznetsov et al, 2003;Germ et al, 2007;Yao et al, 2009), salinity (Kong et al, 2005;Djanaguiraman et al, 2005;Hawrylak-Nowak, 2009) and heavy metals (Srivastava et al, 2009;Cartes et al, 2010) stresses. Selenium exerts beneficial effects on growth and stress tolerance of plants by enhancing their antioxidative capacity (Kong et al, 2005;Rios et al, 2009).…”

Assessment of selenium compounds use in limitation of petroleum impact on antioxidant capacity in sandy soil / Ocena wykorzystania związków selenu w ograniczeniu oddziaływania substancji ropopochodnych na pojemność antyoksydacyjną gleby lekkiej

“…MeOH-TAEC and NaOH-TAEC in soil treated with Se and 5% of diesel fuel almost in whole experiment did not differ significantly in relation to soil with the addition of only 5% of diesel fuel. Values denoted by the same letters within one column for kinds of extracts defines homogenous groups calculated using Tukey posthoc HSD test compounds on the antioxidant properties of plant and animal cells [Tapiero et al 2003, Telesiński et al 2009, Cartes et al 2010, Giacosa et al 2014. There have also been reports of the positive impact of Se ions on the soil enzyme activities [Nowak et al 2004, Borowska et al 2013, Stręk and Telesiński 2014.…”