Study of effect of arbuscular mycorrhiza (Glomus intraradices) fungus on wheat under nickel stress

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Date
2018Author
Heydarian, A.
Tohidi Moghadam, H.R.
Donath, T.W.
Sohrabi, M.
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Show full item recordAbstract
In many regions of the world soils are contaminated with heavy metals and therefore
restricted in their use. For instance, the absorption of nickel (Ni) in the tissue
of plants increase
the plant’s metabolism and cause physiological disorders or even death. Arbuscular mycorrhizal
fungi are known to enhance the tolerance of host plants to abiotic and biotic stress. Thus, we
investigated the potential of the arbuscular m
ycorrhizal fungi
Glomus intraradices
to mitigate
deleterious effects of Ni in wheat. The experiment was conducted using four levels of Ni (0, 60,
120 and 180
mg
per
kg of soil) and two levels of mycorrhizal fungi application (with and without
Glomus intrar
adices
). Nickel stress significantly decreased seed number per spike, thousand
-
seed
weight, seed yield per plant, concentration of chlorophyll a and b. At the same time, we found
increased catalase (CAT) enzyme activity and dityrosine (DT) treatments.
Mycorrhizal fungi
application attenuated Ni effects, i.e. fungal presence increased seed number per spike, thousand
-
seed weight, chlorophyll a and b. Furthermore mycorrhizal fungi application reduce CAT enzyme
activity and DT. In general, our results sugge
st that mycorrhizal fungi application reduces harmful
effects of Ni stress in wheat.