Phytotoxic effects of a natural bloom extract containing microcystins on Lycopersicon esculentum

• Type: Article in International Scientific Journal
• Date: 2012

Authors

Fatima El Khalloufi (Author) Other; Issam El Ghazali (Author) Other; Sana Saqrane (Author) Other; Khalid Oufdou (Author) Other; Vitor Vasconcelos (Author) FCUP; Brahim Oudra (Author) Other

Journal

Title: Ecotoxicology and Environmental Safety

Vol. 79

Pages: 199-205

ISSN: 0147-6513

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 38 Citations

Scopus - 44 Citations

Scientific classification

FOS: Medical and Health sciences > Basic medicine

Other information

Authenticus ID: P-002-AW8

DOI: 10.1016/j.ecoenv.2012.01.002

Abstract (EN): The cyanobacterial toxins microcystins (MC) are known to affect many processes in plants. Their presence in the water used for irrigation may have considerable impact on the survivorship, growth and development of plants. In this study, a crude extract of a toxic cyanobacterial bloom from "Lalla Takerkoust" reservoir (Morocco) was used to study the effects of extract containing MC on tomato plants (Lycopersicon esculentum). Five MC variants: MC-LR, MC-FR, MC-LY, MC-(H4)-YR and DMC-LR were identified by HPLC in the cyanobacterial extract. Exposure of the seeds to the crude extract (containing 22.24 mu g MC mL(-1)) caused a reduction of germination up to 85%. Experiments showed that 30 days exposure of plant to the cyanobacterial extract containing MC caused inhibition of L. esculentum growth and productivity, as well as harmful effects on photosystem II activity, measured by Fv/Fm fluorescence. An accumulation of nutrients Na+, K+ and Ca2+ was also registered. The activity of peroxidase and phenolic content indicated that the extract caused an oxidative stress. The tissue necrosis of leaves was also a consequence of MC exposure indicating a disorder in the exposed plant metabolism.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 7