African Journal of
Agricultural Research

  • Abbreviation: Afr. J. Agric. Res.
  • Language: English
  • ISSN: 1991-637X
  • DOI: 10.5897/AJAR
  • Start Year: 2006
  • Published Articles: 6429

Full Length Research Paper

Effects of cyanotoxins in germination, growth and DNA damages of Lettuce sativa (Lettuce) and Coriandrum sativum (Coriander)

Janiele França Nery
  • Janiele França Nery
  • Hirdric Resources Department, Instituto Nacional do Semiárido, Francisco Lopes de Almeida Avenue, S/N. Paraíba, Brasil.
  • Google Scholar
Gleydson Kleyton Moura Nery
  • Gleydson Kleyton Moura Nery
  • Hirdric Resources Department, Instituto Nacional do Semiárido, Francisco Lopes de Almeida Avenue, S/N. Paraíba, Brasil.
  • Google Scholar
Adriana Guedes Magalhaes
  • Adriana Guedes Magalhaes
  • Hirdric Resources Department, Instituto Nacional do Semiárido, Francisco Lopes de Almeida Avenue, S/N. Paraíba, Brasil.
  • Google Scholar
Walclécio Lira
  • Walclécio Lira
  • Biology Department, Universidade Estadual da Paraíba, Baraunas Avenue, S/N. Paraíba, Brasil.
  • Google Scholar
Salomão de Sousa Medeiros
  • Salomão de Sousa Medeiros
  • Hirdric Resources Department, Instituto Nacional do Semiárido, Francisco Lopes de Almeida Avenue, S/N. Paraíba, Brasil.
  • Google Scholar


  •  Received: 25 August 2020
  •  Accepted: 02 November 2020
  •  Published: 31 January 2021

Abstract

The use of irrigation water containing cyanobacterial toxins can cause significant impacts in agricultural and consequently environmental health. The purpose of this study is to evaluate the effects of cyanotoxins (microcystin-LR and saxitoxin) on germination, growth and micronuclei formation in lettuce (Lettuce sativa) and coriander (Coriandrum sativum). Seeds of lettuce and coriander were exposed during 7-9 days to environmentally relevant concentrations of microcystin-LR (MC-LR1= 0.4 µg/L; MC-LR2= 1.0 µg/L; MC-LR3= 5.0 µg/L) and saxitoxin (SX1= 0.02 µg/L; SX2= 0.1 µg/L; SX3= 0.4 µg/L). In germination test, differential responses were observed being lettuce the most affected in the presence of saxitoxin, and coriander to microcystin-LR treatments. Cyanotoxins inhibit seedlings development to both plants species and promote formation of micronuclei in root cells. Cyanotoxins inhibit seed germination, growth and cause DNA damages, but the intensity depends on both the nature of the toxin and plant species. 

Key words: Cyanobacterial toxin, microcystin-LR, saxitoxin, micronuclei, lettuce, coriander.