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Ratarstvo i povrtarstvo
2018, vol. 55, br. 1, str. 1-5
jezik rada: engleski
vrsta rada: izvorni naučni članak
doi:10.5937/ratpov55-15292

Creative Commons License 4.0
Aktivnost antioksidativnih enzima u ponicima grahorica u uslovima suše
Naučni institut za ratarstvo i povrtarstvo, Novi Sad

e-adresa: dusica.jovicic@ifvcns.ns.ac.rs

Projekat

Povećanje tržišnog značaja krmnih biljaka oplemenjivanjem i optimizacijom tehnologije proizvodnje semena (MPNTR - 31024)

Sažetak

Suša značajno utiče na normalan rast i razvoj biljaka ugrožavajući fiziološke i biohemijske procese. U nepovoljnim uslovima spoljašnje sredine, antioksidantni sistemi zaštite u biljnim ćelijama mogu se aktivirati bez obzira na fazu rasta i razvoja biljaka. Ovaj eksperiment je sproveden na tri vrste grahorica (V. sativa, V. villosa i V. pannonica) u uslovima suše indukovane PEG-om. Aktivnost antioksidantnih enzima superoksid dismutase (SOD), askorbat peroksidaze (APx) i katalaze (CAT) merena je u nadzemnom delu i korenu ponika starim deset dana. Nedovoljna količina vode u početnim fazama rasta aktivirala je sve ispitivane antioksidativne enzime u nadzemnom delu i u korenu ponika svih ispitivanih vrsta roda Vicia. Aktivnost SOD i APx se povećala na višim nivoima stresa, dok su se kod enzima katalaza uočili različiti obrasci delovanja u svim testiranim vrstama. Rezultati ovog eksperimenta ukazuju na povećanu produkciju radikala kiseonika u sušnim uslovima koji dovode do oksidativnog stresa u biljkama.

Ključne reči

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