Ultraviolet-B radiation (280-315 nm) invoked antioxidant defence systems in Vigna unguiculata (L.) Walp. and Crotalaria juncea L.

Selvakumar, V.

doi:10.1007/s11099-008-0017-9

Cited by 23 publications

(8 citation statements)

References 49 publications

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“…HLT high light treatment, UV-B cells were exposed to UV-B for a certain time and then harvested for analysis, UV-B ? HLT UV-B exposure followed by 24 or 72 h of HLT Lipid peroxidation has been regarded as an index of UV-B induced membrane injury in a dose-dependent manner in higher plants Vigna unguiculata and Crotalaria juncea (Selvakumar 2008). The result from this study, however, showed that lipid peroxidation in H. pluvials caused by UV-B was insignificant compared to HLT.…”

Section: Effect Of Uv-b Radiation On Lipid Peroxidation and Antioxidacontrasting

confidence: 57%

“…Ultraviolet (UV) radiation, especially UV-A (320-400 nm) and , can induce reactive oxygen species (ROS) and has significant effects on the growth and productivity of microalgae and plants (Salguero et al 2005;Selvakumar 2008;Xu et al 2008;Zhang and Björn 2008). Microalgae and plant have developed two major classes of antioxidants to mitigate the damage from UV-induced ROS: enzymatic antioxidants such as superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GPx) and non-enzymatic antioxidant such as ascorbate, flavonoids, and carotenoids (Xu et al 2008).…”

Section: Introductionmentioning

confidence: 99%

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Ultraviolet-B radiation improves astaxanthin accumulation in green microalga Haematococcus pluvialis

Chen

Chong

et al. 2010

Biotechnol Lett

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Ultraviolet-B (UV-B) radiation has significantly negative effect on cell survival rate (P < 0.01) and positive effect on astaxanthin accumulation (P < 0.01) of Haematococcus pluvialis. H. pluvialis accumulated 3.2 mg/g of astaxanthin when being exposed to 5 W/m(2) of UV-B for 60 min prior to 72 h of high light treatment, which was 122% higher than that of the control. This UV-B treatment also significantly stimulated lipid peroxidation and the value of malondialdehyde and glutathione peroxidase activities were 156 and 166% higher than those of control, respectively (P < 0.01).

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Section: Effect Of Uv-b Radiation On Lipid Peroxidation and Antioxidacontrasting

confidence: 57%

Section: Introductionmentioning

confidence: 99%

Ultraviolet-B radiation improves astaxanthin accumulation in green microalga Haematococcus pluvialis

Chen

Chong

et al. 2010

Biotechnol Lett

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“…Similarly, several studies have reported that exposure of plants to UV radiation resulted in a marked decrease in fresh mass and protein content (Agrawal 1992;Nasibi and M-Kalantari 2005). It has been reported that a reduction in fresh mass under UV radiation might be related to the enhancement of ROS generation (Mahdavian et al 2008) and hence to the destruction of plasma membranes (Dai et al 1997;Selvakumar 2008). Thus, the reduction in biomass in UV-treated Azolla plants might be related to a decrease in water absorption resulting from the destruction of plasma membranes and proteins due to generation of ROS.…”

Section: Resultsmentioning

confidence: 98%

The ameliorative effect of selenium on Azolla caroliniana grown under UV-B stress

Mostafa

Hassan

2015

phyto

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Exposure of Azolla plants to UV-B radiation for 6 h resulted in a decrease in biomass and relative growth rate (RGR), which coincided with an increase in doubling time (DT) as compared with the control. Also, the protein content decreased. On the other hand, hydrogen peroxyde (H 2 O 2 ) and malondialdehyde (MDA) accumulated significantly in UV-treated Azolla plants. Conversely, the addition of selenium (Se) at 1 ppm resulted in a significant increase in biomass and protein content of untreated and UV-treated Azolla plants, and a significant reduction in both H 2 O 2 and MDA. Moreover, the addition of Se to UV-treated and untreated Azolla plants resulted in a significant increase in total ascorbate and total glutathione (GSH) contents compared with the control and UV-stressed Azolla plants. Also, glutathione redox potential (GSH/TG) increased significantly in UV-treated Azolla plants in the presence of Se. There also was a significant increase (38%) in ascorbate peroxidase (APX) activity in UV-treated plants compared with the control. APX activity in the presence of Se did not change significantly compared with the control. Glutathione reductase (GR) activity increased significantly in UV-treated Azolla, while glutathione peroxidase (GSH-PX) activity did not. On the other hand, both GSH-PX and GR activity in untreated and UV-treated Azolla plants were significantly enhanced by the application of Se to the nutrient media at a concentration of 1 ppm. Therefore, we can conclude that Se protects Azolla plants from UV-B stress.

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“…Selvakumar (14) discussed that high lipid peroxidation might lead to damaged chloroplasts and decreased plant biomass. Although the level of oxidative damage is dependent on the production of various oxidants, the level must also be linked to the capacity of antioxidant system.…”

Section: Lipid Peroxidationmentioning

confidence: 99%

“…In plants, the inactivation and degradation of Rubisco and other components of the Calvin cycle can also result from excessive ROS production. Plants have evolved elaborate defense systems, involving both antioxidant compounds and enzymes, to minimize the cellular concentrations of ROS (13,14).…”

Section: Introductionmentioning

confidence: 99%

Oxidative Stress and Antioxidant Activities of Intertidal Macroalgae in Korea

Park¹,

Han²,

Choi

2011

JFN

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The oxidative stress level and antioxidant activities in two green algae (Ulva pertusa and Ulva linza), two brown algae (Agarum cribrosum and Dictyota dichotoma), and three red algae (Grateloupia lanceolata, Carpopeltis affinis, and Gracilaria verrucosa) collected from intertidal regions of Korea were assessed. In the two green algae, although the total glutathione content was not as high as that of the brown algae, the glutathione pool was extremely reduced, and the glutathione reductase (GRd)/glutathione peroxidase (GPx) activity ratio was high, which apparently plays an important role for protection against oxidative damage, as manifested by low lipid peroxidation. In the brown algae, which exhibited a low lipid peroxidation level that was comparable to the green algal species, the highest glutathione content, together with high GPx activity, appears to be the most important factor in their antioxidant protection. The red algal species exhibited extremely high lipid peroxidation levels. They also contained the lowest and most oxidized glutathione among the species, as well as the lowest GRd activity. In spite of the marked difference in the glutathione content, the significant difference in the activity of γ-glutamylcysteine ligase, the rate limiting enzyme for glutathione synthesis, among the species was not exhibited. Our results suggest that there is a significant difference in the levels of oxidative stress and antioxidant capacity among the algal species, and that the glutathione system, especially the efficiency of glutathione recycling, plays a vital role in antioxidative protection in algal species.

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Ultraviolet-B radiation (280-315 nm) invoked antioxidant defence systems in Vigna unguiculata (L.) Walp. and Crotalaria juncea L.

Cited by 23 publications

References 49 publications

Ultraviolet-B radiation improves astaxanthin accumulation in green microalga Haematococcus pluvialis

Ultraviolet-B radiation improves astaxanthin accumulation in green microalga Haematococcus pluvialis

The ameliorative effect of selenium on Azolla caroliniana grown under UV-B stress

Oxidative Stress and Antioxidant Activities of Intertidal Macroalgae in Korea

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