CONTENT OF ASCORBIC, DEHYDROASCORBIC, DIKETOGULONIC ACIDS IN SUNFLOWER
SEEDLINGS UNDER THE LEAD IONS INFLUENCE
N. Vorobets, I. Mykiyevich
Ivan Franko National University of L'viv,
Hrushevskoho st. 4, L'viv 79005, Ukraine,
e-mail: biofr@franko.lviv.ua
In the presented work, we determined the content of ascorbic (ÀA), dehydroascorbic (DHA), diketogulonic (DÊGA) acids in Helianthus annus L.(cv Svitoch) under influence of 10-8M, 10-5M, 10-3M Pb(CH3COO)2. Sodium selenite (108M) was also added to the solutions mentioned above. It was shown that under lead treatment the AA/DHA ratio was reduced in comparison to the control plants which have been grown up on water and on the Knopp solution. Adding lead acetate (10-5-10-3M) into the solution resulted in significant increment of DHA and DÊGA concentrations in roots. The decrease of the AA/DHA ratio in roots and shoots can be evidence of changes in prooxydant- antyoxydant balance in favour of oxidative processes induced by lead ions.
Key words: ascorbic acid, dehydroascorbic acid, dyketogulonic acid, lead, sunflower.
|