Antioxidant Responses of Wheat Seedlings to Exogenous Selenium Supply Under Enhanced Ultraviolet-B

Yao, Xiaogang; Chu, Jianzhou; Ba, Chaojie

doi:10.1007/s12011-009-8520-9

Cited by 72 publications

(40 citation statements)

References 29 publications

(36 reference statements)

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“…Some reports have shown that Se was beneficial for plant growth under stressful environment [8,10,11,23,24]. Our results indicated that the effects of Se on root growth of wheat seedlings subjected to UV-B stress depended on the Se concentration (Fig.…”

Section: Discussionsupporting

confidence: 59%

“…The results of this study demonstrated that Se supply significantly increased root activity of seedlings, which may promote root growth (Fig. 1) and biomass accumulation of seedlings exposed to enhanced UV-B radiation [11]. Fig.…”

Section: Discussionmentioning

confidence: 56%

“…Recent researches have identified that selenium (Se) can not only promote growth and development of plants but also increase resistance and antioxidant capacity of plants subjected to stress, although Se is not considered to be required by higher plants [8][9][10]. In previous paper, we have also reported that appropriate amount of Se could significantly enhance the antioxidant ability and reduce membrane lipid peroxidation in aboveground parts of wheat seedlings exposed to enhanced UV-B radiation [11]. Moreover, there are only a few studies reporting the influence of Se on belowground parts of plants under stressful environment.…”

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confidence: 99%

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Responses of Wheat Roots to Exogenous Selenium Supply Under Enhanced Ultraviolet-B

Yao

Chu

2009

Biol Trace Elem Res

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Effects of selenium (Se) on growth and some physiological traits of roots in wheat (Triticum aestivum L. cv Han NO.7086) seedlings exposed to enhanced ultraviolet-B (UV-B) stress are reported. Responses of roots were different depending on the Se concentration. Compared with the control, root weight of wheat seedlings treated with 1.0 and 2.0 mg Se kg(-1) soil increased by 39.47% and 16.28%, respectively. The lower amount Se (0.5 mg kg(-1)) and the higher amount Se treatments (3.0 mg kg(-1)) did not significantly affect on root weight. Se treatments significantly increased root activity, flavonoids and proline content, and activities of peroxidase and superoxide dismutase in wheat roots exposed to enhanced UV-B. In addition, the treatments with 0.5, 1.0, and 2.0 mg Se kg(-1) significantly reduced malondialdehyde content and the rate of superoxide radical (O2(-) ) production of roots, whereas the higher amount Se treatment only induced a decrease in the rate of O2(-) production. The results of this study demonstrated that optimal Se supply promoted roots growth of wheat seedlings, and that optimal Se supply could reduce oxidative stress in wheat roots under enhanced UV-B radiation.

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Section: Discussionsupporting

confidence: 59%

Section: Discussionmentioning

confidence: 56%

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confidence: 99%

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Responses of Wheat Roots to Exogenous Selenium Supply Under Enhanced Ultraviolet-B

Yao

Chu

2009

Biol Trace Elem Res

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“…GSH-PX) in Azolla plants. Other studies have shown that an optimal Se concentration inhibits lipid peroxidation in many stressed plants (Cartes et al 2005;Yao et al 2010;Kumar et al 2012).…”

Section: Resultsmentioning

confidence: 94%

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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“…For the past couple of decades, the beneficial role of Se in plants has been reported, but the question is still unresolved whether Se is an essential micronutrient for plants. Some plant species supplemented with Se have also shown enhanced tolerance to certain abiotic stresses like salinity [15,16], drought [17], extreme temperature [18,19], metal toxicity [20,21], and UV radiation [22]. There is evidence for the role of Se in enhancing the cellular antioxidant machineries in plants which resulted in the detoxification of ROS [23].…”

Section: Introductionmentioning

confidence: 99%

Modulation of Antioxidant Machinery and the Methylglyoxal Detoxification System in Selenium-Supplemented Brassica napus Seedlings Confers Tolerance to High Temperature Stress

Hasanuzzaman

Nahar

Alam

et al. 2014

Biol Trace Elem Res

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We investigated the protective role of selenium (Se) in minimizing high temperature-induced damages to rapeseed (Brassica napus L. cv. BINA Sarisha 3) seedlings. Ten-day-old seedlings which had been supplemented with Se (25 μM Na2SeO4) or not were grown separately under control temperature (25 °C) or high temperature (38 °C) for a period of 24 or 48 h in nutrient solution. Heat stress caused decrease in chlorophyll and leaf relative water content (RWC) and increased malondialdehyde (MDA), hydrogen peroxide (H2O2), proline (Pro), and methylglyoxal (MG) contents. Ascorbate (AsA) content decreased at any duration of heat treatment. The content of reduced glutathione (GSH) increased only at 24 h of stress, while glutathione disulfide (GSSG) markedly increased at both duration of heat exposure with associated decrease in GSH/GSSG ratio. Upon heat treatment the activities of ascorbate peroxidase (APX), glutathione S-transferase (GST) and glyoxalase I (Gly I) were increased, while the activities of monodehydroascorbate reductase (MDHAR), dehydroascorbate reductase (DHAR), and catalase (CAT) were decreased. The activities of glutathione reductase (GR) and glutathione peroxidase (GPX) remained unchanged under heat stress. However, heat-treated seedlings which were supplemented with Se significantly decreased the lipid peroxidation, H2O2, and MG content and enhanced the content of chlorophyll, Pro, RWC, AsA, and GSH as well as the GSH/GSSG ratio. Selenium supplemented heat-treated seedlings also showed enhanced activities of MDHAR, DHAR, GR, GPX, CAT, Gly I, and Gly II as compared to heat-treated seedlings without Se supplementation. This study concludes that exogenous Se application confers heat stress tolerance in rapeseed seedlings by upregulating the antioxidant defense mechanism and methylglyoxal detoxification system.

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Antioxidant Responses of Wheat Seedlings to Exogenous Selenium Supply Under Enhanced Ultraviolet-B

Cited by 72 publications

References 29 publications

Responses of Wheat Roots to Exogenous Selenium Supply Under Enhanced Ultraviolet-B

Responses of Wheat Roots to Exogenous Selenium Supply Under Enhanced Ultraviolet-B

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

Modulation of Antioxidant Machinery and the Methylglyoxal Detoxification System in Selenium-Supplemented Brassica napus Seedlings Confers Tolerance to High Temperature Stress

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