This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ PrePrints) and either DOI or URL of the article must be cited.
Cite this article
Ali S, Shahbaz M, Shahzad AN, Fatima A, Khan HAA, Anees M, Haider MS. (2015) Impact of copper toxicity on stone-head cabbage (Brassica oleracea var. capitata) in hydroponics. PeerJ PrePrints3:e830v1https://doi.org/10.7287/peerj.preprints.830v1
Arable soils are frequently subjected to contamination with copper as the consequence of imbalanced fertilization with manure and organic fertilizers and/or extensive use of copper-containing fungicides. In the present study, the exposure of Stone-head cabbage (Brassica oleracea Var. capitata) to elevated Cu2+ levels resulted in leaf chlorosis and lesser biomass yield at ≥ 2 µM. Root nitrate content was not statistically affected by Cu2+ levels, although it was substantially decreased at ≥ 5 µM Cu2+ in the shoot. The decrease in nitrate contents can be related to lower nitrate uptake rates because of growth inhibition by Cu-toxicity. Shoot sulfate content increased strongly at ≥ 2 µM Cu2+ indicating an increase in demand for sulfur under Cu stress. Furthermore, at ≥ 2 µM concentration, concentration of water-soluble non-protein thiol increased markedly in the roots and to a smaller level in the shoot. When exposed to elevated concentrations of Cu2+ the improved sulfate and water-soluble non-protein thiols need further studies for the evaluation of their direct relation with the synthesis of metal-chelating compounds (i.e. phytochelatins).
"Following" is like subscribing to any updates related to a preprint.
These updates will appear in your home dashboard each time you visit PeerJ.
You can also choose to receive updates via daily or weekly email digests.
If you are following multiple preprints then we will send you
no more than one email per day or week based on your preferences.
Note: You are now also subscribed to the subject areas of this preprint
and will receive updates in the daily or weekly email digests if turned on.
You can add specific subject areas through your profile settings.