2004
DOI: 10.1023/b:rupp.0000040746.66725.77
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Changes in the Activity of Antioxidant Enzymes in Wheat Leaves and Roots as a Function of Nitrogen Source and Supply

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Cited by 82 publications
(32 citation statements)
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“…Re-supply of nitrogen decreased activity of both antioxidant enzymes in relation to concentration and type of available sources of nitrogen; lower concentrations of Gln and NO 3 − (1 and 2 mM, respectively) decreased enzymatic activities more efficiently then higher concentrations (10 and 20 mM, respectively). Some studies have shown that ammonium nutrition, as well as nitrogen limitation, induce oxidative stress and increases the activity of antioxidative enzymes (Rios-Gonzales et al, 2002;Polesskaya et al, 2004). As suggested by Potters et al (2007), up-regulation of peroxidase activity may alter auxin metabolism and, consequently, inhibition of cell elongation and differentiation.…”
Section: Discussionmentioning
confidence: 96%
“…Re-supply of nitrogen decreased activity of both antioxidant enzymes in relation to concentration and type of available sources of nitrogen; lower concentrations of Gln and NO 3 − (1 and 2 mM, respectively) decreased enzymatic activities more efficiently then higher concentrations (10 and 20 mM, respectively). Some studies have shown that ammonium nutrition, as well as nitrogen limitation, induce oxidative stress and increases the activity of antioxidative enzymes (Rios-Gonzales et al, 2002;Polesskaya et al, 2004). As suggested by Potters et al (2007), up-regulation of peroxidase activity may alter auxin metabolism and, consequently, inhibition of cell elongation and differentiation.…”
Section: Discussionmentioning
confidence: 96%
“…The data obtained (Table 1) suggest that the Aztek and Rawa varieties are sensitive to high levels of N, which is manifested as an increase in catalase activity [26]. A stimulating effect of macronutrient fertilization on catalase activity has also been observed in various organs of crop plants: in the leaves of wheat [27,28], in potato tubers [7], and in cabbage [29]. Vanacker et al [30] also demonstrated a decrease in catalase activity in the leaves of Pisum sativum L. after 12 weeks of an experiment in conditions of varied nitrogen fertilization.…”
Section: Resultsmentioning
confidence: 99%
“…1), which progressed during the tests development compared to the control, might be due to the nitrate availability splitted through time in these samples due to the antagonistic action exerted by the ammonium ion towards the nitrate assimilation at the root level [6,16]. The lack of nitrate absorbance might be due to a decrease in the transcription rate of the high-affinity inducible protein, in charge of the transport of NO 3 -, which…”
Section: Resultsmentioning
confidence: 99%