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Expression of ferritin gene in Mesembryanthemum crystallinum plants under different supply with iron and different intensity of oxidative stress

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Abstract

In plants of the facultative halophyte Mesembryanthemum crystallinum L. cultivated under climate-controlled conditions, expression of one of ferritin genes, McFer, the ortholog of arabidopsis AtFer1 gene was studied for the first time. The level of this gene expression occurring in response to oxidative stress and changes in the iron status was similar to that of AtFer1 gene. A dependence of McFer gene expression and ferritin content on the regime of plant supplying with Fe-EDTA on the background of medium salinity (300 mM NaCl), oxidative stress modeling by leaf treatment with paraquat (PQ, 100 μM), or in the presence of antioxidant spermidine (Spd, 1 mM) was analyzed. The level of gene expression was assessed by RT-PCR, whereas the content of ferritin by Western blotting, using the primary polyclonal antibody against pea ferritin. An enhanced production of superoxide radical and hydrogen peroxide at leaf treatment with PQ activated gene expression and ferritin content, whereas ROS scavenging with the antioxidant Spd suppressed gene expression. It is concluded that ferritin deposits in the halophyte M. crystallinum, which we have observed earlier in the chloroplasts of the mesophyll and parenchyma of the vascular system, fulfill not only storage but also protective role by binding the excessive Fe2+, a catalyzer of OH·− production.

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Abbreviations

FRO:

ferric-chelate reductase/oxidase

PO:

guaiacol peroxidase

PQ:

paraquat

SOD:

superoxide dismutase

Spd:

spermidine

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Authors and Affiliations

  1. Timiryazev Institute of Plant Physiology, Russian Academy of Sciences, Botanicheskaya ul. 35, Moscow, 127276, Russia

    N. I. Shevyakova, B. Ts. Eshinimaeva & Vl. V. Kuznetsov

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  1. N. I. Shevyakova
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  2. B. Ts. Eshinimaeva
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  3. Vl. V. Kuznetsov
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Correspondence to N. I. Shevyakova.

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Original Russian Text © N.I. Shevyakova, B.Ts. Eshinimaeva, Vl.V. Kuznetsov, 2011, published in Fiziologiya Rastenii, 2011, Vol. 58, No. 5, pp. 664–672.

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Shevyakova, N.I., Eshinimaeva, B.T. & Kuznetsov, V.V. Expression of ferritin gene in Mesembryanthemum crystallinum plants under different supply with iron and different intensity of oxidative stress. Russ J Plant Physiol 58, 768–775 (2011). https://doi.org/10.1134/S1021443711050219

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