Arbuscular mycorrhiza partially protect chicory roots against oxidative stress induced by two fungicides, fenpropimorph and fenhexamid.
The present work examined the oxidative stress induced by different concentrations (0.02 and 0.2 mg l-1) of two sterol biosynthesis inhibitor fungicides (fenpropimorph and fenhexamid) in non-target chicory root colonised or not by Glomus intraradices in a monoxenic system. The fungicides were found to cause oxidative damage by increasing lipid peroxidation measured by malondialdehyde production in non-colonised roots. Detoxification of the H(2)O(2) product was measured at 0.2 mg l-1 of fenpropimorph by an increase in peroxidase activities suggesting an antioxidant capacity in these roots. Moreover, this study pointed out the ability of arbuscular mycorrhiza to alleviate partially the oxidative stress in chicory roots, probably by lowering reactive oxygen species concentrations, resulting from increases in antioxidant defences. Our results suggest that the enhanced fungicide tolerance in the AM symbiosis could be related to less cell membrane damage.
Campagnac
Estelle
E
Univ Lille Nord de France, Lille, France.
Lounès-Hadj Sahraoui
Anissa
A
Debiane
Djouher
D
Fontaine
Joël
J
Laruelle
Frédéric
F
Garçon
Guillaume
G
Verdin
Anthony
A
Durand
Roger
R
Shirali
Pirouz
P
Grandmougin-Ferjani
Anne
A
D000577:Amides / Q000633:toxicity*; D018651:Cichorium intybus / Q000187:drug effects*; D005659:Fungicides, Industrial / Q000633:toxicity*; D055137:Glomeromycota / Q000254:growth & development*; D006861:Hydrogen Peroxide / Q000378:metabolism; D009025:Morpholines / Q000633:toxicity*; D018384:Oxidative Stress; D018517:Plant Roots / Q000187:drug effects*
D000577:Amides; D005659:Fungicides, Industrial; D009025:Morpholines; C050435:fenpropimorph; D006861:Hydrogen Peroxide; C451426:N-(2,3-dichloro-4-hydroxyphenyl)-1-methylcyclohexanecarboxamide