69
Views
1
CrossRef citations to date
0
Altmetric
Original Articles

Effects of prior continuous grafting on the growth and cadmium accumulation of Nasturtium officinale cuttings

, , , ORCID Icon, , , , , , & show all
Pages 48-58 | Received 10 Jun 2019, Accepted 21 Aug 2019, Published online: 27 Aug 2019
 

ABSTRACT

The growth and cadmium (Cd) accumulation of Nasturtium officinale cuttings taken from plants continuously grafted (three times) onto the rootstock of Brassica oleracea were studied in a pot experiment. As the number of grafting events increased, the biomass of the Cd-accumulator N. officinale significantly increased. With the third grafting event, the root and shoot biomasses increased by 369% and 142%, respectively, compared with the control. The photosynthetic pigment content also increased gradually, showing a stable trend after the third grafting event. The superoxide dismutase and peroxidase activities and the soluble protein content reached maximum values with the first grafting event, but the catalase activity showed a gradually increasing trend. The Cd content in N. officinale decreased gradually, but Cd extraction by N. officinale showed an increasing trend. With the third grafting event, the Cd extractions by the roots, shoots and whole plants of N. officinale increased by 190%, 69% and 90%, respectively, compared with the control. Thus, cuttings from continuously grafted N. officinale plants had increased growth and Cd accumulation rates, which improved the phytoremediation capability of N. officinale, with three grafting events being optimum.

Acknowledgments

We thank Lesley Benyon, PhD, from Liwen Bianji, Edanz Group China (www.liwenbianji.cn/ac), for editing the English text of a draft of this manuscript.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by the National Natural Science Foundation of China [31560072].

Reprints and Corporate Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

To request a reprint or corporate permissions for this article, please click on the relevant link below:

Academic Permissions

Please note: Selecting permissions does not provide access to the full text of the article, please see our help page How do I view content?

Obtain permissions instantly via Rightslink by clicking on the button below:

If you are unable to obtain permissions via Rightslink, please complete and submit this Permissions form. For more information, please visit our Permissions help page.