Zinc Accumulation and Tolerance in Solanum nigrum are Plant Growth Dependent

• Type: Article in International Scientific Journal
• Date: 2015

Authors

Kalina A Samardjieva (Author) Other; Rui F Goncalves (Author) Other; Patricia Valentao (Author) FFUP; Paula B Andrade (Author) FFUP; Jose Pissarra (Author) FCUP; Susana Pereira (Author) FCUP; Fernando Tavares (Author) FCUP

Journal

Title: International Journal of Phytoremediation

Vol. 17

Pages: 272-279

ISSN: 1522-6514

Publisher: Taylor & Francis

Indexing

ISI Web of Knowledge - 10 Citations

Scopus - 16 Citations

Scientific classification

FOS: Natural sciences > Earth and related Environmental sciences

Other information

Authenticus ID: P-009-Y44

DOI: 10.1080/15226514.2014.898018

Abstract (EN): Zinc tolerance, accumulation, and organic acid production by Solanum nigrum, a known Zn accumulator, was studied during pre- and post-flowering stages of development. The plants, when challenged with Zn concentrations lethal to plantlets, showed an increase in tolerance from pre-flowering to post-flowering, which was accompanied by a reduction of Zn translocation to the aerial plant parts. Treatment with Zn induced a differential response in organic acids according to the plant organ and developmental stage. In the roots, where Zn concentrations were similar in pre- and post-flowering plants, a general decrease in organic acid in pre-flowering roots contrasted with the increase observed in post-flowering plants. In the stems, Zn induced a generalized increase in organic acids at both growth stages while in the leaves, a slight increase in malic and shikimic was observed in pre-flowering plants and only shikimic acid levels were significantly increased in post-flowering plants. This work shows that Zn accumulation and tolerance in S. nigrum vary during plant development - an observation that may be important to improve the efficiency of phytoremediation approaches. Furthermore, the data suggest the involvement of specific organic acids in this response.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8