Pošlji prispevek (e-pošta) Antioksidacijski odziv vodenke (Impatiens walleriana L.) na sušo
Povzetek
Stres, ki ga povzroča suša sproži v rastlinah spremembe v morfologiji, biokemični zgradbi in fiziologiji, kar vodi k znatnemu zmanjšanju rasti in produktivnosti rastlin. Namen raziskave je bil ovrednotiti antioksidacijsko obrambo sejank vodenke (Impatiens walleriana L.) v sušnem stresu. Antioksidacijski odziv vodenke na sušo je bil ovrednoten z naslednjimi parametri: aktivnostjo katalaze, guajakol peroksidaze, pirogalol peroksidaze in askorbat peroksidaze, vsebnostjo celokupnih fenolov in flavonoidov in celokupne antioksidacijske kapacitete. Poskus je bil izveden v rastni sezoni 2020 v rastlinjaku v nadzorovanih razmerah. Polovica sejank vodenke (20 rastlin), je bila po aklimatizaciji razmeram rastlinjaka izpostavljena sušnemu stresu za pet dni, medtem ko je bila druga polovica (20 rastlin) redno zalivana. Rezultati raziskave so pokazali, da je izpostavitev sejank vodenke sušnemu stresu povečala aktivnosti analiziranih encimov, vsebnosti celokupnih fenolov in flavonoidov ter celokupno antioksidacijsko sposobnost listov. Večja izpostavitev vodenk suši je v opazovanem obdobju povzročila večji encimski in neencimski antioksidacijski obrambni odziv. Rezultati potrjujejo, da ima vodenka sposobnost razvoja encimskega in neencimskega antioksidacijskega obrambnega sistema in lahko preživi krajša obdobja izpostavitve suši.
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DOI: http://dx.doi.org/10.14720/aas.2022.118.4.2438
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