Nitrate fertilization enhances manganese phytoextraction in Tanzania guinea grass: a novel hyperaccumulator plant?

Manganese (Mn) is essential for plants but very toxic at high rates. However, hyperaccumulators can tolerate high Mn concentrations in plant tissue, especially when properly fertilized with N. Tanzania guinea grass (Megathyrsus maximus Jacq.

Nitrate and ammonium proportion plays a key role in copper phytoextraction, improving the antioxidant defense in Tanzania guinea grass.

Various nitrate and ammonium proportions (NO/NH) in the growth media can increase metal phytoextraction compared to supplying solely NO. However, there are no studies showing these effects in plants under copper (Cu) contamination as well as their consequences in plant stress tolerance. The objective was to evaluate the effect of NO/NH proportions in Cu phytoextraction by Panicum maximum cv.

NO/NH ratios affect nutritional homeostasis and production of Tanzania guinea grass under Cu toxicity.

Nitrogen (N) can alleviate metal toxicity. However, as of yet, there have been no studies showing the efficacy of NO/NH in mitigating Cu toxicity. The objective of this study was to evaluate the Cu toxicity on the nutritional and productive attributes of Panicum maximum cv.

NO/NH proportions affect cadmium bioaccumulation and tolerance of tomato.

With the growth of the world population, cadmium (Cd) concentration in the environment has increased considerably as a result of human activities such as foundry, battery disposal, mining, application of fertilizers containing toxic elements as impurities, and disposal of metal-containing waste. Higher plants uptake N as ammonium (NH), nitrate (NO ), and many other water-soluble compounds such as urea and amino acids, and nourishing plants with N, providing part of it as NH, is an interesting alternative to the supply of this nutrient in the exclusive form of NO under Cd toxicity. The objective was to evaluate the influence of NO /NH proportions on the development and tolerance of tomato plants grown under the presence of Cd in the culture medium.