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Hartikainen, Helinä

doi:10.1023/a:1026512921026

Cited by 429 publications

(108 citation statements)

References 36 publications

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“…For instances, Ca can maintain the membrane integrity (Kirkby and Pilbeam 1984); Mg appears to provide a protective function in maintaining plant tissue integrity (Wilkinson et al 1990); K can provide a correct ionic environment in cytoplasm for metabolic processes, thereafter maintaining the normal osmotic pressure in cells and inhibiting the production of reactive oxygen species (ROS) (Leigh and Wyn Jones 1984;Ismail 2005). Since high level exposure of Se can cause the enhancement of membrane permeability, damage the membrane integrity and result in high oxidative stress in plants (Hartikainen et al 2000;Xue et al 2001), the enhanced uptake of Ca, Mg and K by Chinese brake fern might indicate the involvements of these three elements in the tolerance mechanism of Se, particularly in its roots where Se mainly stored (Fig. 1a, b).…”

Section: Uptake Of Essential Elements Under Se Exposure In Chinese Brmentioning

confidence: 99%

Effects of Se on the uptake of essential elements in Pteris vittata L.

Feng

Wei

et al. 2009

Plant Soil

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Selenium has been proven to be an antioxidant in plants at low dosages. To understand better the mechanisms of Se toxicity and benefit to plants, more investigations about effects of Se on the uptake of essential elements in plants would be desirable. In this study, hydroponic (nutrient solution culture) and pot (soil culture) experiments were simultaneously conducted to investigate the effects of Se on the uptake and distribution of essential elements in Pteris vittata. L (Chinese brake fern), an arsenic (As)-hyperaccumulator and a selenium (Se)-accumulator. Chinese brake fern took up much more Se in nutrient solution culture than in soil culture, with the highest Se content recorded as 1,573 mg kg −1 in the roots, demonstrating remarkable tolerance to Se. In soil culture, Chinese brake fern also accumulated high content of Se, with the highest content measured as 81 mg kg −1 and 233 mg kg

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Section: Uptake Of Essential Elements Under Se Exposure In Chinese Brmentioning

confidence: 99%

Effects of Se on the uptake of essential elements in Pteris vittata L.

Feng

Wei

et al. 2009

Plant Soil

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“…

AbstractThe objective of this study was to investigate the effect of Selenium (Se) supply (0,3,6,12,24 ) increased MDA content by 28%, decreased net photosynthetic rate and carboxylation efficiency by 34% and 39%, respectively. The Se concentration in the roots, stems, and leaves of the tobacco plants significantly increased with increasing Se application.

…”

mentioning

confidence: 99%

Effects of selenium on the growth and photosynthetic characteristics of flue-cured tobacco (Nicotiana tabacum L.)

Jiang

Shen

et al. 2015

Acta Soc Bot Pol

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The objective of this study was to investigate the effect of Selenium (Se) supply (0,3,6,12,24 ) increased MDA content by 28%, decreased net photosynthetic rate and carboxylation efficiency by 34% and 39%, respectively. The Se concentration in the roots, stems, and leaves of the tobacco plants significantly increased with increasing Se application. A linear correlation (R = 0.95, P < 0.01) was observed between Se level and tobacco plant tissue Se concentration. This correlation indicated that the tobacco plant tissues were not saturated within the concentration range tested. The pattern of total Se concentration in the tobacco plant tissues followed the order root > leaf > stem. The Se concentration in the roots was 3.17 and 7.57 times higher than that in the leaves and stems, respectively, after treatment with 24 mg kg −1 Se. In conclusion, the present study suggested that optimal Se dose (6 mg kg −1 ) improved the plant growth mainly by enhancing photosynthesis, stomatal conductance, carboxylation efficiency and Rubisco content in the flue-cured tobacco leaves. However, the inhibition of excess Se on tobacco growth might be due to high accumulation of Se in roots and the damage of photosynthesis in leaves.

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“…These results suggest that the diminished action of oxygen species could explain the protective role of in Al-stressed plants. The results point out to Se as exerting a dual effect on seedling growth process: at low concentration, it could act as an antioxidant enhancing growth of Al-inhibited seedlings, whereas at higher concentration it could act as a growth-inhibiting agent [9,24]. In fact, selenomethionine at high concentration inhibited seedling growth, as shown in [25], and several Se-soluble compounds elicited ethylene production by seeds and seedlings of Townsville stylo [14].…”

Section: Discussionmentioning

confidence: 89%

“…These results suggest that the , at low concentration, may act as an antioxidant (possibly as a ROS quencher) to counteract inhibit- SeO  tion of root and hypocotyl elongation of Townsville stylo seedlings. In fact, Se can overcome oxidative damages displaying a protective effect against stressing conditions [8,9]. Selenate addition restored hypocotyl growth to the level of the control under any concentration of Al used.…”

Section: Discussionmentioning

confidence: 95%

“…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]. This antagonistic property makes Se unique in studies dealing with systems requiring ROS to elicit a physiological response.…”

Section: Introductionmentioning

confidence: 99%

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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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Cited by 429 publications

References 36 publications

Effects of Se on the uptake of essential elements in Pteris vittata L.

Effects of Se on the uptake of essential elements in Pteris vittata L.

Effects of selenium on the growth and photosynthetic characteristics of flue-cured tobacco (Nicotiana tabacum L.)

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

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