TY  - JOUR

AU  - Oboznyi, A.I.
AU  - Kolupaev, Yu.E.
AU  - Vayner, A.A.
AU  - Yastreb, T.O.

T1  - The Role of Superoxide Dismutase in Inducing of Wheat Seedlings Tolerance to Osmotic Shock

JO  - Journal of Stress Physiology & Biochemistry

Y1  - 2013

VL  - 9

IS  - 3

SP  - 251

EP  - 261

UR  - http://www.jspb.ru/issues/2013/N3/JSPB_2013_3_251-261.pdf


KW  - reactive oxygen species
KW  - hydrogen peroxide
KW  - superoxide dismutase
KW  - hardening
KW  - osmotic shock





N1  - Owner: Алексей

N1  - Added to JabRef: 2013.07.17

N2  - Influence of  short-term hardening osmotic exposure (immersion in 1 M sucrose solution with subsequent transferring to distilled water for 20 min) on the hydrogen peroxide generation and superoxide dismutase activity in wheat (Triticum aestivum L., cv. Elegiya) seedlings and their tolerance to osmotic shock were investigated. During the initial 30 min after osmotic exposure, the increasing of hydrogen peroxide amount in roots and shoots (to a lesser extent) was observed, but the resistance of the seedlings and superoxide dismutase (SOD) activity decreased. Sometime later the decrease in hydrogen peroxide amount and the increase of seedlings tolerance to osmotic shock took place. SOD activity increased in 10 min after hardening osmotic exposure. Transient accumulation of hydrogen peroxide induced in this way was suppressed by the treatment of seedlings with sodium diethyldithiocarbamate (DDC), SOD inhibitor. DDC and hydrogen peroxide scavenger dimethylthiourea decreased positive hardening effect of osmotic exposure on the development of seedlings tolerance. It was concluded that SOD providing the generation of signal hydrogen peroxide pool took part in the induction of seedlings tolerance to osmotic shock development caused by preliminary hardening effect.

ER  -