Cadmium Accumulation and Its Effects on Uptake of Micronutrients in Indian Mustard [Brassica juncea(L.) Czern.] Grown in a Loamy Sand Soil Artificially Contaminated with Cadmium

Effects of cadmium on uptake and translocation of nutrient elements in different welsh onion (Allium fistulosum L.) cultivars

“…This implies that there was a synergistic effect in elementary accumulation in different cultivars, which benefited the screening-out of microelements-rich cultivars (Arivalagan et al, 2012), while limiting the application of heavy metal-excluding cultivars in soils with low or moderate levels of heavy metals, as selection for one trait leads to the selection of genetically correlated traits (Wricke & Weber, 1986). Moreover, the correlation would be affected by Cd, especially for P, Fe and Mn, due to the imbalance of uptake and/or translocation of nutrient elements caused by Cd (Liu et al, 2011;Sikka & Nayyar, 2012;Street et al, 2010;Wang et al, 2007). The change in the P-Mn correlation from positive to highly significantly negative when the Cd concentration reached 5.0 mg/kg suggests that the balance of P-Mn in different cultivars was seriously disturbed by Cd.…”

“…However, the response of uptake and translocation of nutrient elements to heavy metal pollution might be different, even in net direction, depending on the factor such as plant species and element types. Sikka and Nayyar (2012) found a decrease in the content of micronutrients (Mn, Fe, Cu, Zn) in Indian mustard [Brassica juncea (L.) Czern.] with the application of Cd, but a significant reduction in Fe occurred only in treatments with Cd concentrations above 50 mg/kg.…”

Effect of Heavy Metals in Plants of the Genus Brassica

“…According to Zaier et al [ 67 ] more tolerant plants are able to selectively absorb essential nutrients and maintain adequate nutrition of their organs, and they report a significant reduction in nutrients concentration in B. juncea under Pb stress. In a study about the toxicity of Cd in B. juncea plants grown in Cd-contaminated soil, Sikka and Nayyar [ 90 ] detected significant reductions in the uptake of Fe and also, to a lesser degree, of Cu and Zn. In B. napus under Cd stress [ 88 ], only Zn levels were significantly reduced in the leaves but not below the deficiency threshold.…”

THE Cd:Zn RATIO IN A SOIL AFFECTS Cd TOXICITY IN SPINACH (Spinacea oleracea L.)

“…As expected from simple mass balance, the concentration of Cd in spinach leaves increased as the level of Cd in the soil increased. With the addition of Cd to the soil, it is expected that both the soluble and exchangeable pools of Cd in the soil would also increase and that this would ultimately increase plant uptake leading to diminished growth and development of spinach (Sikka and Nayyar, 2012). While addition of Zn at the lower level (1:10 ratio) did not significantly affected the concentration of Cd in spinach plants compared to those plants grown in the Cd contaminated soil, there was a slight increase in the concentration of Cd with the addition of Zn at a 1:10 ratio, i.e.…”

“…The concentration of these metals in the edible parts of leafy vegetables depends mainly on the magnitude of soil contamination and the soil quality. Whereas, the innate ability of the plant to tolerate exposure to heavy metals together with the degree of soil contamination determine the overall tolerance of the plant to soil heavy metals (Sikka and Nayyar, 2012). Spinach has a relatively high potential to accumulate heavy metals such as Cd and Pb in its leaves and thus high potential to cause adverse human health effects when these leaves are consumed (Chunilall et al, 2004;Intawongse and Dean, 2006).…”