UČINKI NANO DELCEV TiO2 IN SUŠNEGA STRESA NA IZBRANE MORFOLOŠKE IN FIZIOLOŠKE LASTNOSTI MOLDAVSKE KAČJEGLAVKE (Dracocephalum moldavica L.)

Hamid Mohammadi, Mohammad Esmailpour, Ali GHERANPAYE

Povzetek


Sušni stres je eden izmed najpomembnejših okoljskih dejavnikov, ki omejujejo rast in produktivnost rastlin. Uporaba nano delcev titanovega dioksida (TiO2 nano anataza) ima lahko velike učinke na fiziološke, biokemične in morfološke lastnosti gojenih rastlin. V tej raziskavi je bil v naključnem faktorskem bločnem poskusu preučevan vpliv različnih koncentracij nano delcev TiO2 (0, 10 in 40 ppm) in sušnega stresa na moldavsko kačjeglavko (Dracocephalum moldavica L.) v treh ponovitvah. Rezultati so pokazali, da sta se suha masa in vsebnost eteričnih olj povečali pri normalnem namakanju in listnem dodajanju 10 ppm TiO2 nano delcev. V razmerah sušnega stresa so vsebovale rastline, ki so bile tretirane z 10 ppm TiO2 več prolina in mnogo manj H2O2 in malonildialdehida v primerjavi z netretiranimi rastlinami. Na osnovi tega bi lahko zaključili, da bi z uporabo primerne koncentracije nano delcev TiO2 kot zunanjega stimulanta, lahko izboljšali rast poganjkov in vsebnost eteričnih olj pri tej rastlini. Poškodbe kot sta oksidativni stres in poškodovanost membran, ki nastanejo zaradi sušnega stresa, bi lahko ublažili s foliarno aplikacijo primerne koncentracije nanodelcev TiO2.

Ključne besede


aromatične rastline, sušni stres, malondialdehid, reaktivne oblike kisika, TiO2 nano delci

Celotno besedilo:

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Literatura


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DOI: http://dx.doi.org/10.14720/aas.2016.107.2.11

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