Differential Early Fluctuations in Superoxide Dismutase and Catalase Activities Are Included in the Responses of Young Maize Organs to S-Deprivation — Oak Academic Publishing
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Differential Early Fluctuations in Superoxide Dismutase and Catalase Activities Are Included in the Responses of Young Maize Organs to S-Deprivation
Plant Physiology Laboratory, Department of Plant Biology, Faculty of Agricultural Biotechnology, Agricultural University of Athens, Athens, Greece
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Plant Physiology Laboratory, Department of Plant Biology, Faculty of Agricultural Biotechnology, Agricultural University of Athens, Athens, Greece
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Plant Physiology Laboratory, Department of Plant Biology, Faculty of Agricultural Biotechnology, Agricultural University of Athens, Athens, Greece
1 Plant Physiology Laboratory, Department of Plant Biology, Faculty of Agricultural Biotechnology, Agricultural University of Athens, Athens, Greece
2 Plant Physiology Laboratory, Department of Plant Biology, Faculty of Agricultural Biotechnology, Agricultural University of Athens, Athens, Greece
3 Plant Physiology Laboratory, Department of Plant Biology, Faculty of Agricultural Biotechnology, Agricultural University of Athens, Athens, Greece
water soluble protein fraction (WSPF) content along with the SOD and the CAT activities were comparatively monitored in leaf blades, sheaths and roots. S-deprivation progressively diminished WSPF first in the sheaths, two days later in the blades, and four days later in the root. SOD activity per mg WSPF decreased at d2, whilst it increased for the next four days. After d6, SOD activities of roots and sheaths decreased, followed by the blades at d10. CAT activity per mg WSPF at d2 decreased only in blades, whilst increased in both sheaths and roots (more in sheaths). After d6 decreased CAT activity was found only in roots. No other decreases were observed in blades and sheaths. SOD and CAT specific activities on DM basis presented an oscillation pattern with the increase of DM. S-deprivation altered this picture, by reversing the oscillation pattern and by decreasing the trendlines. SOD specific activity initially decreased in –S sheaths and roots, whilst it remained unchanged in –S blades. Then it increased abruptly, decreased in an exponential manner and stabilised in all three organs. S-deprivation caused an early fluctuation of the CAT activity and then diverse responses; in blades a late increase in CAT activity was observed and decreases in the other two organs. S-deprivation seemed to reverse the oscillation pattern of CAT specific activity differentially for each organ type.
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