Selenium effects on oxidative stress in potato

Seppänen, Mervi; Turakainen, Marja; Hartikainen, Helinä

doi:10.1016/s0168-9452(03)00085-2

Cited by 191 publications

(133 citation statements)

References 45 publications

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“…Selenium (Se) is of metabolic importance in cyanobacteria (Li et al 2003) and in some plants, being involved in their antioxidative processes (Harrison et al 1988;Ekelund & Danilov 2001;Fu et al 2002;Seppänen et al 2003). Se is widely distributed on the Earth's surface and available for plants in at least small traces.…”

Section: Introductionmentioning

confidence: 99%

“…Whether it is essential for higher plants and involved in their metabolism is poorly understood. There is evidence for its involvement in antioxidative processes in higher plants (Seppänen et al 2003); as selenocysteine in the glutathione peroxidase homologue in Chlamydomonas (Fu et al 2002), and in protecting Euglena against UV-B radiation stress (Ekelund & Danilov 2001). Thus it could be important in mitigating the effects of increasing UV-B radiation at the Earth's surface, which is harmful to organisms.…”

Section: Introductionmentioning

confidence: 99%

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UV-B radiation and selenium affected energy availability in green alga Zygnema

2009

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Green alga Zygnema was exposed to three concentrations of selenium and two levels of UV-B radiation. The combined effects of both treatments on energy availability; photochemical quantum yield and respiratory potential were studied. Our findings show that traces of selenium enhance metabolic process connected with photochemical quantum yield and mitochondrial respiration. Surprisingly, selenium does not diminish the effects of UV-B radiation; on the contrary, the combined action of UV-B radiation and traces of selenium leads to pronounced negative effects on photochemical quantum yield and the respiratory potential. Selenium is involved in the activation of energy resources in green alga Zygnema. The importance of selenium for activity of the mitochondria is possibly an evolutionary recollection from an endosymbiotic bacterium.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

UV-B radiation and selenium affected energy availability in green alga Zygnema

2009

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“…Beneficial effects of Se were reported explored in terms of plant protection against abiotic stress (Hartikainen and Xue 1999), plant protection against reactive oxygen compounds (Ríos et al 2009), activator of the protective mechanism that reduces oxidation stress for example in chloroplasts (Seppänen et al 2003), phloem-feeding aphids and herbivorous caterpillars (Hanson et al 2004), and fungal diseases (Hanson et al 2003). Selenium has a positive effect also on potato carbohydrate accumulation and possibly on yield formation (Turakainen et al 2004).…”

mentioning

confidence: 99%

“…However, no Se-containing GSH-Px was identified in plants, in contrast to animals (Dayer et al 2008, Ríos et al 2009). Seppänen et al (2003) discovered that Se reduced the activity of superoxide dismutase (SOD) and in some cases the amount of tocopherols.…”

mentioning

confidence: 99%

Effect of foliar application of selenium on the content of selected amino acids in potato tubers (Solanum tuberosum L.)

Ježek¹,

Hlušek²,

Lošák³

et al. 2011

PLANT SOIL ENVIRON

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Selenium (Se) is an important element associated with the enhancement of antioxidant activity in organisms. Potato is very suitable for fertilisation with Se (biofortification). The experiment was performed to examine the effect of foliar application of Se as sodium selenite (200 or 400 g Se/ha) at the tuberisation stage on a spectrum of amino acids in tubers of varieties. The trends of amino acids were consistent in both years of the study. Application of Se increased the relative content of total essential (EAA) and non-essential (NEAA) amino acids relative to the controls (Karin: EAA 16.81-21.73% and NEAA 14.18-18.63%; Ditta: EAA 4.71-13.00% and NEAA 5.78-6.49%). The increase in the content of phenylalanine (Phe) was particularly significant (up to 48.9%) when also the contents of aspartic acid (Asp), glutamic acid (Glu), threonine (Thr), and tyrosine (Tyr) increased significantly compared with the controls. The results of changes in the content of isoleucine (Ile), leucine (Leu), lysine (Lys), methionine (Met), valine (Val), alanine (Ala), arginine (Arg), proline (Pro), cysteine (Cys), glycine (Gly), histidine (His), and serine (Ser) were also discussed. The highest dose of selenium is shown as a stress factor. Its toxic effects resulted in a change of amino acid contents.

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“…Selenium (Se) is interesting in this matter because in response to oxidative stresses, Se compounds at low concentrations, perform a protective function by scavenging free radicals [7,8]. On the other hand, excess Se can cause damage to plants, likely by triggering ROS generation [9,10].…”

Section: Introductionmentioning

confidence: 99%

A dual role of selenium in the growth control of seedlings of Stylosanthes humilis

Ribeiro¹,

Mapeli²,

Antunes³

et al. 2011

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The growth of seedlings of Townsville sytlo (Stylosanthes humilis H.B.K.) is inhibited by aluminium (Al) ions, their elongation being recovered with sodium selenate at 1.0 µM. Methyl viologen and hydrogen peroxide, reactive oxygen species (ROS)-generating compounds, also inhibited seedling elongation and again growth was relieved by selenate. Selenate, thus, seemed to be operating as a ROS quencher, since N-acetylcysteine (NAC), an antioxidant compound, also stimulated largely the growth of Al-inhibited seedlings. At a higher concentration (0.1 mM), however, selenate inhibited seedling growth and elongation was recovered by NAC. Ethylene production by selenate plus NAC-treated seedlings was very higher and thus the gaseous hormone was not responsible for the seedling growth inhibition caused by selenate. Hence, it seems that at high levels selenate operates as a ROS-generating compound whose effects were counteracted by NAC. It can be deduced that, at low concentration, selenate behaves as a ROS quencher and at high level as a ROS-promoting species.

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Selenium effects on oxidative stress in potato

Cited by 191 publications

References 45 publications

UV-B radiation and selenium affected energy availability in green alga Zygnema

UV-B radiation and selenium affected energy availability in green alga Zygnema

Effect of foliar application of selenium on the content of selected amino acids in potato tubers (Solanum tuberosum L.)

A dual role of selenium in the growth control of seedlings of Stylosanthes humilis

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