Interaction Between Cadmium Stress and Sulphur Nutrition Level on Macronutrient Status of Sinapis alba L.

Abstract

This study evaluated the possibility of improving the macronutrient status of Cd-stressed white mustard ‘Rota’ using intensive S nutrition. Three S-SO4 (2, 6, 9 mM S) and four CdCl2 doses (0, 0.0002, 0.02, 0.04 mM Cd) in the Hoagland’s nutrient solution were conducted for 14 days. High S supply (6 or 9 mM) appears, to some extent, to affect positively the macronutrient status of Cd-stressed mustard. It increased roots and shoots contents of K and S, without significant changes in P content. Simultaneously, Mg content in shoots and roots remained stable, but Mg bioaccumulation was elevated. Shoot Ca content at the lowest and medium Cd dose decreased, whilst was unaffected at the highest Cd treatment. Intensive S nutrition of Cd-stressed mustard increased root N content and accumulation at the highest Cd concentration, but the N content dropped in above-ground parts. The bioaccumulation of remained macronutrients in general was substantially elevated together with enhanced Cd accumulation. Thus, the intensive S nutrition can enhance mustard tolerance to Cd stress by improvement macronutrients relations in plants, and S supplementation may be recommended for mustard cultivation on the Cd-contaminated areas.

SLIM1 Transcription Factor Promotes Sulfate Uptake and Distribution to Shoot, Along with Phytochelatin Accumulation, Under Cadmium Stress in Arabidopsis thaliana

“…Cd exposure-induced synthesis of GSH and PC stimulates S assimilation by Cys, a major substrate for GSH synthesis [28][29][30][31]. Recent studies reported the close relation between sulfur availability and increased plant tolerance to Cd stress [32][33][34][35][36]. S assimilation in plants starts with the uptake of sulfate by the rhizosphere via sulfate transporters (SULTR) [30,31,37].…”

Sulfur supply as a sustainable technology for phytoextraction: its effects on cadmium uptake and detoxification in Panicum maximum Jacq. cv. Massai

“…Plants exposed to Cd usually exhibit lowest nutrient contents because Cd decreases plant biomass production, while nutrient content is positively correlated to biomass production (EKVALL; GREGER, 2003;CLEMENS, 2006;MATRASZEK et al, 2016aMATRASZEK et al, , 2016b.…”

“…The increase in S concentration is a result of highest S supply (DAVIDIAN; KOPRIVA, 2010). It should be remembered that S well-nourished plants are more tolerant to Cd, which is essential for Cd phytoextraction DEDE;OZDEMIR, 2016;MATRASZEK et al, 2016aMATRASZEK et al, , 2017RABÊLO;AZEVEDO;. Sulfur can reduce Fe oxidation in the roots of plants exposed to Cd, which decreases Fe plaques stability (GAO et al, 2010), and possibly favors Mn 2+ uptake, which is essential to decrease the oxidative stress induced by Cd, since Mn acts on ROS detoxification in mitochondria and peroxisomes (Mn-SOD) (GILL; TUTEJA, 2010).…”

“…reduced glutathione -GSH and phytochelatins -PCs), which act on detoxification of this metal RABÊLO;AZEVEDO;. In addition, proper S supply can at least partially restore ionic equilibrium and enhance macronutrient accumulation in plants exposed to Cd, alleviating Cd-induced toxicity (MATRASZEK et al, 2016a;.…”

“…MATRASZEK et al, 2017), lettuce(MATRASZEK et al, 2016a) and mustard(MATRASZEK et al, 2016b), which is dangerous for food production but desirable for Cd phytoextraction (SHEORAN; SHEORAN; POONIA, 2016). Excessive S supply increases Cd content in the roots due to reduction in Fe plaques formation(FAN et al, 2010) and allows highest Cd transport from roots to shoot(ZHANG et al, 2013), possibly due to PCs synthesis, since PCs act in Cd transport from roots to shoot.…”