| Symposium |
| Effect of age and magnesium supply on the free radical and anti-oxidant
content of plants |
| Sándor A. Kiss1, Ilona Szöllôsi Varga2*,
Zoltán Galbács3, Takács-Hájos Mária4,
Csikkel-Szolnoki Anna3 |
| 1Faculty of Agriculture, University of Novi Sad, Novi Sad,
Yugoslavia, 2Department of Genetics and Molecular Biology,
University of Szeged, Szeged, Hungary |
| The scientific literature signs that the shortage of magnesium may
increase the free radical content in the animal and human tissues, but
nothing can be kown about a similar effect in the plants. This is why
we decided to research the plant tissues to know how the radical content
and the concentration of antioxidants which may eliminate the free radicals.
We have researched the wheat (Triticum aestivum var. GK Pinka),
maize (Zea mays var. Furio) and table beet (Beta vulgaris
var. Rubra). We measured the concentrations in the coleoptyle of wheat
and maize and in the roots of table beet. On the basis of our measurements
we may conclude that the increase of magnesium concentration in the nutrient
solution does decrease the radical content (HO•, LPO) and the activity
of antioxidants. It is known, that the production of free radicals does
increase as the uncoupling of oxidative phosphorilation is increasing
according to its measure. Nevertheless the reduction of concentration
of magnesium increases the measure of uncoupling of oxidative phosphorilation
and the production of free radicals. On the basis of these effects one
can understand why the radical content is lower after the addition magnesium
ions into the nutrient solution. The decrease of activity of activity
of GSH, catalase and FRAP-value may be understood also: the real cause
is the fact that the promoter free radicals needed to the “de novo
synthesis” have decreased. The last conclusion may be the next:
the magnesium does influence the of free radicals and antioxidants in
the plant tissues.
Acta Biol Szeged 47(1-4):127-130 (2003) PDF
|
| Key Words: free radicals, anti-oxidant content, magnesium supply,
wheat, maize, table beet |
| *Corresponding author. E-mail: szvarga@biocom.bio.u-szeged.hu
|