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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Kovácik, Jozef Babula, Petr Hedbavny, Josef Svec, Pavel |
| Description | Author Affiliation: Kovácik J ( Institute of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelská 1, 613 00 Brno, Czech Republic. Electronic address: jozkovacik@yahoo.com.); Babula P ( Department of Natural Drugs, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences Brno, Palackého 1/3, 612 42 Brno, Czech Republic.); Hedbavny J ( Institute of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelská 1, 613 00 Brno, Czech Republic.); Svec P ( Institute of Chemistry and Biochemistry, Faculty of Agronomy, Mendel University in Brno, Zemedelská 1, 613 00 Brno, Czech Republic.) |
| Abstract | Impact of manganese $(Mn^{2+})$ excess (100, 500 and 1000 μM 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 μM Mn-induced oxidative stress in seedlings (decrease in $H_{2}O_{2}$ 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. |
| File Format | HTM / HTML |
| ISSN | 01689452 |
| Volume Number | 215-216 |
| e-ISSN | 18732259 |
| Journal | Plant Science |
| Language | English |
| Publisher | Elsevier |
| Publisher Date | 2014-02-01 |
| Publisher Place | Ireland |
| Access Restriction | One Nation One Subscription (ONOS) |
| Subject Keyword | Discipline Botany Adaptation, Physiological Manganese Adverse Effects Matricaria Metabolism Nitric Oxide Oxidative Stress Reactive Oxygen Species Seedling Antioxidants Hydrogen Peroxide Drug Effects Growth & Development Microscopy, Fluorescence Methods Pharmacology Nitric Oxide Donors Nitroprusside Peroxidases Sulfhydryl Compounds Superoxides Journal Article Research Support, Non-u.s. Gov't |
| Content Type | Text |
| Resource Type | Article |
| Subject | Genetics Plant Science Medicine Agronomy and Crop Science |
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