1422 KB46 KB200420252025Goncharovska, InnaKuznetsov, VolodymyrLevon, VolodymyrVergun, Olena12 str.letnik:121številka:2DOI:10.14720/aas.2025.121.2.21957ISSN:1854-1941COBISSID_HOST:242791427URN:URN:NBN:SI:doc-I1C6VOVIenZaložba Univerze v LjubljaniActa agriculturae Slovenicaanthocyaninsantocianiniascorbic acidaskorbinska kislinachalconeshalkonimalondialdehidmalondialdehydeMalusEffect of low-temperature stress on antioxidant defense in Malus spp.|The antioxidant defence system of plants consists of various antioxidant compounds and enzymes that play a key role in reducing oxidative damage and regulating the decay of reactive oxygen species, which are vital for metabolic processes. To evaluate the relationship between antioxidant components and stress resistance of apple plants, we studied the level of malondialdehyde, ascorbic acid, anthocyanins and chalcones in the bark of annual shoots. The results show that at sub-zero temperatures, the level of malondialdehyde in the apple plants studied increased by 1.6 % compared to positive temperatures. Based on the normal probability distribution, the correlation coefficient was r = 0.91 for anthocyanins, r = 0.97 for chalcones, r = 0.98 for vitamin C and r = 0.99 for malondialdehyde. The correlation value between anthocyanins and chalcones was r = 0.1 (p > 0.62), between anthocyanins and vitamin C r = -0.4 (p> 0.29), and between anthocyanins and malondialdehyde r = 0.5 (p > 0.05). The correlation analysis shows that among the secondary metabolites, chalcones (r = 0.7) have a greater ability, while anthocyanins (r = 0.5) have a lower ability, to inhibit excessive accumulation of malondialdehyde and protect lipid membranes from severe degradation of apple cellsAntioksidativni obrambni sistem rastlin sestavljajo različne antioksidativne spojine in encimi, ki imajo ključno vlogo pri zmanjševanju oksidativnih poškodb in uravnavanju razpada reaktivnih kisikovih vrst, ki so bistvene za presnovne procese. Da bi ocenili povezavo med antioksidativnimi sestavinami in odpornostjo jablan na stres, smo v skorji enoletnih poganjkov preučevali raven malondialdehida, askorbinske kisline, antocianinov in halkonov. Rezultati kažejo, da se je pri temperaturah pod ničlo raven malondialdehida v preučevanih jablanah v primerjavi s pozitivnimi temperaturami povečala za 1,6 %. Na podlagi normalne verjetnostne porazdelitve je bil korelacijski koeficient r = 0,91 za antocianine, r = 0,97 za halkone, r = 0,98 za vitamin C in r = 0,99 za malondialdehid. Vrednost korelacije med antocianini in halkoni je bila r = 0,1 (p > 0,62), med antocianini in vitaminom C r = -0,4 (p > 0,29) ter med antocianini in malondialdehidom r = 0,5 (p > 0,05). Korelacijska analiza je pokazala, da imajo med sekundarnimi metaboliti hal-koni (r = 0,7) večjo, antocianini (r = 0,5) pa manjšo sposobnost zaviranja prekomernega kopičenja malondialdehida in zaščite lipidnih membran pred hudo degradacijo jabolčnih celicTEXTznanstveno časopisjejournalsSlovenian National E-content AggregatorNational and University Library of SloveniaUniverza v Ljubljani, Biotehniška fakulteta