Cadmium‐induced changes in glutathione and phenolics of Thlaspi and Noccaea species differing in Cd accumulation

Abstract

Glutathione (GSH) and phenolics play an important role in plant defense against metal-ion toxicity. The antioxidant activity and metal-binding capacity of these compounds can account for the protective effects. In contrast to animal-cell models, however, the possible interplay among these substances in stress defense of plants is poorly investigated. This study compares the influence of cadmium (Cd) on the profiles of both soluble phenolics and GSH in shoots of different Thlaspi and Noccaea species: two ecotypes of the nonhyperaccumulator T. arvense differing in Cd resistance (ecotype Aigues Vives, Cd-sensitive, and ecotype Jena, Cd-resistant) and two Cd-tolerant Cd-Zn hyperaccumulators N. praecox and N. caerulescens (formerly Thlaspi praecox and T. caerulescens). To reveal the possible influence of Cd-induced sulfur (S) shortage on the stress response, plants receiving normal S concentrations (500 lM MgSO 4 ) and plants treated with surplus S (500 lM MgSO 4 + 500 lM K 2 SO 4 ) were analyzed. Our working hypothesis was that species differences in tolerance to high tissue Cd concentrations should be reflected by differences in endogenous levels of GSH and phenolic compounds. The results reveal clear species-dependent differences in both the constitutive patterns and the Cd-and S-induced changes in shoot concentrations of GSH and phenolics. However, no simple relationship between these shoot concentrations and Cd accumulation and tolerance can be established.

Seasonal changes in antioxidative/oxidative profile of mining and non-mining populations of Syrian beancaper as determined by soil conditions

“…Thus, summer MT leaves were characterized by high PAL and sPRX activities and by higher concentration of compounds with antioxidant function and metal-chelation properties, such as HCAs and flavonoids (Agati et al, 2012;Andejelkovic et al, 2006;Rice-Evans et al, 1997). Accumulation of phenolic compounds in leaf tissues was also observed in different plant species exposed to heavy metal (Llugany et al, 2013;Singh et al, 2015, and refs. herein), and also in plants grown in multi-polluted soils (Márquez-García et al, 2009;Martínez-Alcalá et al, 2013).…”

The Effect of Root Exudate 7,4′-Dihydroxyflavone and Naringenin on Soil Bacterial Community Structure

“…caerulescens shoots, potato tubers, leek bulbs, and L . perenne shoots did not find 7,4′-dihydroxyflavone [ 55 – 60 ]. These culture-independent studies on the abundance of Acidobacteria subdivision 4 point out that its growth can be influenced by plants, implying plant—microbe interactions.…”

Phytochemical Profile, Bioactive Properties, and Se Speciation of Se-Biofortified Red Radish (Raphanus sativus), Green Pea (Pisum sativum), and Alfalfa (Medicago sativa) Microgreens

“…6,7 Phenolic compounds are a large group of secondary metabolites in plants that are related to defense responses. 8 Moreover, these metabolites are well-known to show numerous bioactive properties, such as antioxidant and antiinflammatory. 9 Carotenoids and chlorophylls are the main pigments found in plants.…”