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  • Impact of manganese (Mn(2+)) excess (100, 500 and 1000 mýM over 7 days) on two ontogenetic stages (7-week-old plants and 7-day-old seedlings) of Matricaria chamomilla was compared. Mn excess depressed growth of seedlings (but not germination) and stimulated oxidative stress (ROS and lipid peroxidation) in both plants and seedlings. Growth inhibition could be evoked by higher Mn uptake and higher translocation factor in seedlings than in plants. Total thiols staining revealed elevation in almost all treatments. In 7-week-old plants, activity of peroxidases increased slightly and rather decreased under high Mn doses. Superoxide rather than hydrogen peroxide contributed to visualized ROS presence. Fluorescence of nitric oxide (NO) showed stimulation in plants but decrease in seedlings. Impact of exogenous nitric oxide donor (sodium nitroprusside/SNP) was therefore tested and results showed amelioration of 1000 mýM Mn-induced oxidative stress in seedlings (decrease in H2O2 and increase in NO content while antioxidative enzyme activities were variably affected) concomitantly with depleted Mn accumulation. It is concluded that NO participates in tolerance to Mn excess but negative effects of the highest SNP dose were also observed. Extensive fluorescence microscopy is also explanatively discussed.
  • Impact of manganese (Mn(2+)) excess (100, 500 and 1000 mýM over 7 days) on two ontogenetic stages (7-week-old plants and 7-day-old seedlings) of Matricaria chamomilla was compared. Mn excess depressed growth of seedlings (but not germination) and stimulated oxidative stress (ROS and lipid peroxidation) in both plants and seedlings. Growth inhibition could be evoked by higher Mn uptake and higher translocation factor in seedlings than in plants. Total thiols staining revealed elevation in almost all treatments. In 7-week-old plants, activity of peroxidases increased slightly and rather decreased under high Mn doses. Superoxide rather than hydrogen peroxide contributed to visualized ROS presence. Fluorescence of nitric oxide (NO) showed stimulation in plants but decrease in seedlings. Impact of exogenous nitric oxide donor (sodium nitroprusside/SNP) was therefore tested and results showed amelioration of 1000 mýM Mn-induced oxidative stress in seedlings (decrease in H2O2 and increase in NO content while antioxidative enzyme activities were variably affected) concomitantly with depleted Mn accumulation. It is concluded that NO participates in tolerance to Mn excess but negative effects of the highest SNP dose were also observed. Extensive fluorescence microscopy is also explanatively discussed. (en)
Title
  • Manganese-induced oxidative stress in two ontogenetic stages of chamomile and amelioration by nitric oxide
  • Manganese-induced oxidative stress in two ontogenetic stages of chamomile and amelioration by nitric oxide (en)
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  • Manganese-induced oxidative stress in two ontogenetic stages of chamomile and amelioration by nitric oxide
  • Manganese-induced oxidative stress in two ontogenetic stages of chamomile and amelioration by nitric oxide (en)
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  • RIV/62157124:16370/14:43872731!RIV15-MSM-16370___
http://linked.open...avai/riv/aktivita
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  • P(EE2.3.30.0017), V
http://linked.open...iv/cisloPeriodika
  • 1
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  • 27126
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  • RIV/62157124:16370/14:43872731
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  • Reactive oxygen species; Ontogenesis; Mineral nutrients; Heavy metals; Fluorescence microscopy (en)
http://linked.open.../riv/klicoveSlovo
http://linked.open...odStatuVydavatele
  • IE - Irsko
http://linked.open...ontrolniKodProRIV
  • [4604653708FC]
http://linked.open...i/riv/nazevZdroje
  • Plant Science
http://linked.open...in/vavai/riv/obor
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  • 215-216
http://linked.open...iv/tvurceVysledku
  • Babula, Petr
  • Švec, Pavel
  • Kováčik, Jozef
  • Hedvábný, Josef
http://linked.open...ain/vavai/riv/wos
  • 000330154000001
issn
  • 0168-9452
number of pages
http://bibframe.org/vocab/doi
  • 10.1016/j.plantsci.2013.10.015
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  • 16370
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