Morfo-fiziološki i hormonski odgovor različitih sorti ozime pšenice na sušni stres u fazi klijanja i klijanaca

Abstract

Drought stress can have a significant influence on the reduction of wheat (Triticum aestivum L.) growth and development. This study investigated morpho-physiological, abscisic (ABA) and salicylic (SA) acids' responses of six winter wheat varieties (Rujana, Silvija, Fifi, Bubnjar, Anđelka and Pepeljuga) during the germination and seedling stage. Plants were exposed to 10 and 20% polyethylene glycol (PEG) solution for seven days. Certain morphophysiological changes were observed under stress condition in comparison to controls, such as a reduction of germination energy (GE), shoot length, relative water content (RWC), increase of root growth, depending on varieties and stress intensity. ABA was increased in all cultivars confirming stress status of the plants. SA showed a tendency to decrease depending on the concentration of PEG and was positively correlated with shoot length and shoot dry weight. In the varieties Rujana, Anđelka, Fifi and Bubnjar a less significant decrease in germination energy was recorded, compared to Pepeljuga and Silvij