Effect of heavy metals on nitrate and protein metabolism in sugar beet

Reis

Communications in Soil Science and Plant Analysis

et al. 2009

Upland rice plants, cultivar 'IAC 202,' were grown in nutrient solution until full tillering. Treatments consisted of ammonium nitrate (AN) or urea (UR) as nitrogen (N) source plus molybdenum (Mo) and/or nickel (Ni): AN + Mo + Ni, AN + Mo-Ni, AN-Mo + Ni, UR + Mo + Ni, UR + Mo-Ni, and UR-Mo + Ni. The experiment was carried out to better understand the effect of these treatments on dry-matter yield, chlorophyll, net photosynthesis rate, nitrate (N03-N), total N, in vitro activities of urease and nitrate reductase (NR), and Mo and Ni concentrations. In UR-grown plants, Mo and Ni addition increased yield of dry matter. Regardless of the N source, chlorophyll concentration and net photosynthesis rate were reduced when Mo or Ni were omitted, although not always significantly. The omission of either Mo or Ni led to a decrease in urease activity, independent of N source. Nitrate reductase activity increased in nutrient solutions without Mo, although N03-N increased. There was not a consistent

Section: Resultscontrasting

confidence: 68%

Section: Introducfionmentioning

confidence: 99%

Effects of Molybdenum, Nickel, and Nitrogen Sources on the Mineral Nutrition and Growth of Rice Plants

Reis

Communications in Soil Science and Plant Analysis

et al. 2009

“…Decline in protein content obtained in present experiment is in agreement with the results obtained for Beta vulgaris in presence of Ni and Cd (Kevresan et al, 1998) and in barley when the plant was exposed to Cu (Demirevska- Kepova et al, 2003). Latif (2010) has also reported sharp reduction in total protein content in radish when treated with NiSO4.…”

Section: Discussionsupporting

confidence: 92%

Ni-inhibited seedling growth in Zea mays (maize) involves alterations in associated biochemical processes

Negi

2016

Ann. Pl. Sci.

An experiment was carried out to investigate the effect of Nickel (Ni) (5–50 µM) on seedling growth, dry weight, chlorophyll content and carotenoid content of Zea mays (maize) grown in petries after 96 h exposure to Ni. The experiment was further extended to investigate the effect of Ni on water soluble protein content and the activities of protease and oxidoreductase enzymes (POD, PPO) in the roots of maize exposed to Ni. The results indicated that Ni inhibits both root and coleoptile length in test plant followed by reduction in chlorophyll and carotenoid contents. Decrease in the activity of proteases and protein content was also observed in test plant. The reduction was observed more in Z. mays roots as compared to coleoptile when treated with Ni. Further, significant reduction in chl b was noted more than chl a in the test plant. However, the increased activities of peroxidase (POD) and polyphenol oxidase (PPO) were observed with increase in Ni concentrations in Z. mays roots.

Biotechnology & Biotechnological Equipment

“…Its chemical properties are similar to those of Fe and Co. Plants take up this microelement in the form of Ni 2+ ions that produce a stable complex with certain organic molecules like cysteine and citrate. Also, Ni plays an important role in N metabolism (14). Ni transport through xylem and phloem is rapid and effi cient while its considerable accumulation into plant fruits and seed is also known.…”

Section: Ni Content In Plantsmentioning

confidence: 99%

The Potential of Different Plant Species for Nickel Accumulation

Krstic

Stanković²,

Igić

et al. 2007

Contamination of the environment with toxic heavy metals is a mayor environmental problem. Aimed to fi nd effective and economical attractive solutions for environment cleaning, scientists intensively evolve various phytoremediation techniques. Nickel is one of the essential micronutrients for plants, animals, and humans, but toxic at elevated concentrations. Also, it belongs to a group of heavy metals. In respect of the fact that Ni uptake relies upon plant species and that some of them show hyperaccumulation effects, the aim of our study was to analyse Ni concentration in certain plant species affected by Ni contamination of air and surface soil. Ni deposition in the air was below 60 μg/m²/month, while Ni content in the soil was between 42 and 150 μg/g. Average Ni content in plants ranged from 0.1 to 5.0 μg/g. Regardless the analysed locality, the highest Ni (7.1 μg/g) was obtained with the hogweed, whereas the lowest (4.5 μg/g) with the vines. Ambrosia artemisifolia and Taraxum offi cinale accumulated the greatest amounts of Ni (10.72 and 10.61 μg/g, respectively). It may be concluded that the analysed plant species exhibit various phytoremediation potential for Ni under the same ecological conditions.