Changes on organic acid secretion and accumulation in Plantago almogravensis Franco and Plantago algarbiensis Samp. under aluminum stress

• Type: Article in International Scientific Journal
• Date: 2013

Authors

Neusa Martins (Author) Other; Sandra Goncalves (Author) Other; Paula B Andrade (Author) FFUP; Patricia Valentao (Author) FFUP; Anabela Romano (Author) Other

Journal

Title: Plant Science

Vol. 198

Pages: 1-6

ISSN: 0168-9452

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 16 Citations

Scopus - 17 Citations

Scientific classification

FOS: Natural sciences > Biological sciences

Other information

Authenticus ID: P-002-20E

DOI: 10.1016/j.plantsci.2012.09.001

Abstract (EN): We investigated the effect of Al (400 mu M) on organic acids secretion, accumulation and metabolism in Plantago almogravensis Franco and Plantago algarbiensis Samp. Al induced a significant reduction on root elongation only in P. algarbiensis. Both species accumulated considerable amounts of Al (>120 mu g g(-1)) in their tissues, roots exhibiting the highest contents (>900 mu g g(-1)). Al stimulated malonic acid secretion in P. alga rbiensis, while citric, succinic and malic acids were secreted by P. almogravensis. Moreover, Al uptake was accompanied by substantial increases of citric, oxalic, malonic and fumaric acids contents in the plantlets of either species. Overall, the acid metabolizing enzymes were not directly involved in the Al induced organic acid secretion and accumulation. Our data suggest that Al detoxification in P. almogravensis implies both secretion of organic acids from roots and tolerance to high Al tissue concentrations, while in P. algarbiensis only the tolerance mechanism seems to be involved.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6