Josip Juraj Strossmayer University of Osijek. Department of biology.
Abstract
Ograničena dostupnost vode jedan je od glavnih čimbenika oksidativnog stresa u biljkama, a u takvim uvjetima
nastaju reaktivne kisikove jedinke (ROS) koje oštećuju biološke membrane i stanične strukture. Cilj ovog
istraživanja bio je odrediti kako stres uvjetovan zasušivanjem utječe na fiziološki odgovor različitih genotipova
klijanaca kukuruza (Zea mays L.). Zasušivanje je u većini genotipova izazvalo povećanje koncentracije lipidne
peroksidacije, vodikovog peroksida i sadržaja prolina. Rezultati ovog istraživanja ukazuju da je odgovor na stres
zasušivanjem ovisan o genotipu kukuruza te da možemo razlikovati genotipove kukuruza s većom tolerancijom
na zasušivanje i one osjetljivije. Potrebna su daljnja istraživanja antioksidacijskog sustava i mjerenja drugih
komponenti oksidacijskog stresa kako bi se utvrdila povezanost između količine ROS-a i antioksidacijskog
odgovora.Limited water availability is one of the main factors of oxidative stress in plants. In such conditions formation of
reactive oxygen species (ROS) can damage biological membranes and cell structures. The aim of this study was
to determine how water withholding stress affected the physiological response of different maize seedlings (Zea
mays L.) genotypes. Water withholding caused an increase in the concentration of lipid peroxidation, hydrogen
peroxide and proline content in most genotypes. The results of this study indicate that the response to water
withholding stress in maize is genotype-dependent and that we can distinguish maize genotypes with higher
tolerance and those more sensitive to stress. Further studies of the antioxidant system and measurements of other
components of oxidative stress are needed in order to determine the relationship between the amount of ROS and
the antioxidant response
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