Interactive effects of arbuscular mycorrhizal fungus on growth and physiology in the non-host crop Brassica napus L. under herbicide Super Gallant toxicity

Herbicide Super Gallant is used to narrow leaf weeds control in canola fields, extensively. Although family Brassicaceae does not tend to colonize with arbuscular mycorrhizal fungi, this experiment was designed to evaluate the capabilities of arbuscularmycorrhizal fungi to improve physiological conditions of plants other than colonization (e.g. to improve physical properties of soil). Canola plants and fungus Glomus intraradices was used to evaluate alleviating effects of arbuscular mycorrhizal fungi on toxicity due to herbicide Super Gallant. Mycorrhizal and non-mycorrhizal canola plants were treated with four levels of the herbicide (0, 10, 50 and 100 ppm) in 4 replications. Increased levels of the herbicide (100 ppm) caused a significant decline in content of total proteins, total soluble sugars of root and shoot which were fairly less obvious in mycorrhizal treatedplants. Furthermore, level of malondialdehyde was raised as an effect of high concentrations of the herbicide. This increase was more dramatic in inoculated plants in comparison with the control. So, considering lack of mycorrhizal symbiosis it seems that positive effects due to presence of arbuscular mycorrhizal fungi can be results of soil environment improvement rather than mycorrhizal symbiosis itself

کلیدواژه ها:

Arbuscular mycorrhiza ، Canola ، Herbicide ، Super gallant ، Malondialdehyde