ZAŠČITNI UČINKI POLIAMINOV NA URAVNAVANJE SENESCENCE REZANIH MNOGOCVETNIH NAGELJČKOV (Dianthus caryophyllus’Spotlight’)

Mahnaz KARIMI, Fateme AKBARI, Ayoub HEIDARZADE

Povzetek


V raziskavi je bil ovrednoten vpliv treh poliaminov (PAs) na antioksidacijsko sposobnost, odpravljanje prostih radikalov in izboljšanje trajanja rezanih večcvetnih nageljčkov. Odrezani poganjki s cvetovi so bili izpostavljeni različnim koncentracijam (0, 1, 2 in 3 mmol) putrescina (Put), spermidina (Spd) in spermina (Spm) za 24 h. Po obravnavanju so bile odrezane rastline premeščene v destilirano vodo pri 20 °C ± 2 °C, 70-80 % RH. Vse koncentracije putrescina so podaljšale trajanje rezanega cvetja v primerjavi s kontrolo. Največji pozitivni učinek na trajanje cvetja (13 dni) je imelo obravnavanje z 2 mmol putrescina. Rezultati so pokazali, da je uporaba putrescina in spermina v koncentracijah 1 ali 2 mmol značilno zmanjšala upad mase cvetja v primerjavi s kontrolo. Pri obravnavanjih z 1 ali 2 mmol putrescina in 1 mmol spermina je bilo opaženo značilno zmanjšanje razgradnje antocianina. V venčnih listih rezanih nageljčkov, tretiranih z 1 mmol putrescina sta bili značilno povečani aktivnosti katalaze in DPPH nevtralizacije radikalov. Zaključimo lahko, da ima lahko uporaba poliaminov kot je putrescin ključno vlogo pri preprečevanju in odlogu propadanja rezanega cvetja.

Ključne besede


antocianin; aktivnost katalaze; rezano cvetje; trajanje; poliamini

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2017.109.3.03

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