Biohemijska karakterizacija listova paradajza u uslovima vodnog deficita

Abstract

Cilj ovog istraživanja je bio da se ispita uticaj vodnog deficita na sadržaj prolina i hlorofila, lipidnu peroksidaciju i na vegetativni rast biljaka u listovima dve linije paradajza (M7 i R83). Biljke paradajza su gajene u stakleniku i primenjivana su tri vodna režima (100, 70 i 50% poljskog kapaciteta). Naši rezultati su pokazali da je prosečan sadržaj prolina bio veći u listovima izloženim vodnom deficitu kod obe linije, pri čemu je kod linije R83 razlika ranije registrovana i bila je veća kod tretmana vodnog deficita 50% poljskog kapaciteta. Nije nađena razlika u lipidnoj peroksidaciji između tretmana kod linije M7, dok je kod linije R83 ona bila povećana kod tretmana vodnog deficita od 50% poljskog kapaciteta. Sadržaj hlorofila je bio sličan između tretmana kod ispitivanih linija. Redukcija rastenja u uslovima suše bila je izraženija kod linije M7. Na osnovu dobijenih rezultata možemo zaključiti da linija R83 ima potencijalno bolji odgovor na sušu.

The aim of this investigation was to evaluate the effects of water deficit on proline and chlorophyll content, lipid peroxidation and plant vegetative growth in the leaves of two tomato lines (M7 and R83). Tomato plants were grown in a glasshouse and three water regimes were applied (100, 70 and 50% field capacity). Our results showed that the average proline content was higher in the leaves exposed to water deficit of both lines, whereas in the line R83 this difference was registered earlier and was higher in the treatment the 50% field capacity treatment. No difference in lipid peroxidation was found between treatments of the line M7 , while lipid peroxidation was increased in the 50% field capacity treatment of the line R83. Chlorophyll content was similar between treatments in the tested lines. Growth reduction in drought conditions was more pronounced in the line M7. Based on the obtained results, we can conclude that the line R83 has a potentially better response to drought.