Metabolism of cyanide by Chinese vegetation

Yu, Xiao-Zhang; Trapp, Stefan; Zhou, Puhua; Wang, Chang; Zhou, Xishi

doi:10.1016/j.chemosphere.2004.02.008

Cited by 47 publications

(34 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Multiplied by factor 40 gives a rate of 78.7 mg CN/(kg·d) or 3.3 mg CN/(kg·h). A rate of 3.3 mg CN/(kg·h) at 22 0 C and of 3.4 mg CN/(kg·h) at 24 0 C, which is obtained if only root mass is considered, is in fair agreement to the earlier obtained result of 4.1 mg CN/(kg·h) for weeping willow leaves at room temperature (23 0 C) and the same initial concentration (Yu et al, 2004). Furthermore, the rate determined here does not correspond to the maximal removal rate v max , which would be obtained at higher initial concentrations or by a non-linear fit to results from varying concentrations.…”

Section: Discussionsupporting

confidence: 80%

“…Loss from controls without plants was negligible, so most likely, all loss was due to metabolism by plant enzymes. This is consistent with earlier findings (Ebbs et al, 2003;Larsen et al, 2004Larsen et al, , 2005Yu et al, 2004). The calculated cyanide metabolism rates are shown in Table 1.…”

Section: Mass Balance Of Cyanidesupporting

confidence: 81%

“…Yu et al (2004) found for weeping willow Salix babylonica L. a removal capacity of 6.08 mg CN/(kg·h) with an initial concentration in solution of 0.94 mg CN/L in the test with detached leaves in a closed bottle. The same test was performed with varying concentrations in solution (0.49; 1; 2.07; 7.59 mg CN/L) to determine the Michaelis-Menten parameters (Yu et al 2005b).…”

Section: Discussionmentioning

confidence: 99%

“…Twenty-eight-Chinese plant species from 23 families were tested for their removal capacity to remove cyanide in a closed-bottle test (Yu et al, 2004). All species were found to metabolize cyanide, but with different velocity.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Effect of Temperature on the Uptake and Metabolism of Cyanide by Weeping Willows

Trapp

Zhou

et al. 2007

International Journal of Phytoremediation

Self Cite

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 80%

Section: Mass Balance Of Cyanidesupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Temperature on the Uptake and Metabolism of Cyanide by Weeping Willows

Trapp

Zhou

et al. 2007

International Journal of Phytoremediation

Self Cite

View full text Add to dashboard Cite

“…In earlier experiments with toxic organic chemicals, differences between tree species in uptake, metabolism and phytotoxicity were not very pronounced (Larsen et al 2004, Yu et al 2004. Therefore, it is unlikely that the majority of other tree species is more sensitive to an exposure with/to MNP than the basket willows tested in this stuy.…”

Section: Limitations Of the Approachmentioning

confidence: 99%

Insignificant acute toxicity of TiO2 nanoparticles to willow trees

et al. 2008

Self Cite

View full text Add to dashboard Cite

Goal, Scope and Background. Manufactured nanoparticles are expected to increase in production in near future. In response, their environmental fate and effects are intensively studied. Phytotoxicity of some types of nanoparticels has been observed for annual species in the seed germination and root elongation test. Yet, no results of toxicity tests with trees have been reported. Woody species, dominant in many ecosystems, may be in particular vulnerable, due to the large porous wood compartment. Materials and Methods.This study tests the toxicity of TiO 2 -nanoparticles on trees with the short-term willow tree transpiration test. TiO2-particles with 25 and 100 nm diameter were suspended in distilled water at concentrations of 0, 1, 10 and 100 mg/L (first test) and 0, 10, 20 and 50 mg/L (second test). Effects on transpiration, growth and water use efficiency of exposed willow cuttings were monitored. The concentration of nanoparticles was measured by spectrophotometry.Results. None of the measured effect parameters (growth, transpiration and water use efficiency) showed any significant change during the test. Particles were rapidly lost from solution, probably due to sedimentation as a result of aggregation, and also due to adsorption to roots. The loss of nanoparticles from solution was faster for particles with larger diameter and in the presence of trees.Discussion. Willow trees were not sensitive to short-term exposure to TiO2-nanoparticles. Similar results were obtained for other plant species. Effects of nanoparticles were observed for zinc and zinc oxide particles, but these effects were probably due to heavy metal toxicity and not nano-size specific. 2Conclusions. In summary, we came to the conclusion that woody species are not in particular vulnerable to nanosized TiO2-particles in the conditions, concentrations and time periods used in this study. Recommendations and Perspectives.The preliminary results of this study should be confirmed with other types of MNP, other plant species, experiments in soil and experiments combining longer duration and low exposure concentrations, before a final conclusion in this issue can be made.

show abstract

Increased β‐cyanoalanine synthase and asparaginase activity in nitrogen‐deprived wheat exposed to cyanide

Machingura

Ebbs

2010

Z. Pflanzenernähr. Bodenk.

View full text Add to dashboard Cite

The b-cyanoalanine pathway in plants detoxifies cyanide by assimilating this metabolic poison. Given the possibility that cyanide in soil could serve as an alternate source of nitrogen for plant nutrition, this study investigated whether nitrogen deprivation of wheat seedlings altered the activity of the first enzyme of the pathway (b-cyanoalanine synthase) or asparaginase. The results suggest that ambient, nontoxic concentrations of soil cyanide may serve as an alternate source of nitrogen for plants under nitrogen-limiting conditions.

show abstract

Metabolism of cyanide by Chinese vegetation

Cited by 47 publications

References 9 publications

Effect of Temperature on the Uptake and Metabolism of Cyanide by Weeping Willows

Effect of Temperature on the Uptake and Metabolism of Cyanide by Weeping Willows

Insignificant acute toxicity of TiO2 nanoparticles to willow trees

Increased β‐cyanoalanine synthase and asparaginase activity in nitrogen‐deprived wheat exposed to cyanide

Contact Info

Product

Resources

About