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

Mostafa, E. M.; Hassan, Atiat Mohamed

doi:10.7202/1031954ar

Cited by 6 publications

(7 citation statements)

References 44 publications

(47 reference statements)

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“…It has been documented that enhanced GR activity results in more GSH production and better protection against oxidative stress (54). Similar to our study an increase in GR activity with increased GSH contents were noted in Azolla caroliniana Kaulf and Pteris vittata L (49,50). Co-application of sulphate along with selenate lowered GR activity due to less uptake of Se in the presence of S and ultimately lowered ROS production.…”

Section: Discussionsupporting

confidence: 89%

“…Evidence of a positive relationship between selenate concentration and GPx activity suggests the existence of a selenate-dependent GPx in plants (55). Moreover, selenate supplementation causes an increase in the activity of GPx which shows this enzyme functions to antagonise ROS formation in plants (49). Our study registered elevation in GPx activity in both the tested cultivars exhibiting greater variations in cv.…”

Section: Discussionsupporting

confidence: 58%

“…khitish due to its susceptibility to selenate. Significant increase in GSH under selenate exposure provides protection from oxidative damage as demonstrated in Azolla caroliniana Kaulf (49). It was reported that enhanced ROS production due to high concentrations of selenate leads to an imbalance in the production of GSH, thiols (-SH), ferredoxins (Fd.red) and/or NADPH, that play vital role in selenate assimilation (50).…”

Section: Discussionmentioning

confidence: 99%

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Modulation of ascorbate-glutathione cycle by selenate and sulphate treatments in the seedlings of two rice (Oryza sativa L.) cultivars

Das¹,

Seal

Biswas

et al. 2020

Plant Sci. Today

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The trace element Selenium (Se) has a dual role in the growth and metabolism of plants. Low concentration of selenium (2 ?M selenate) promotes growth and counteracts the detrimental effects of abiotic stress as opposed to higher levels (?10 ?M) where it acts as a pro-oxidant. We focused on both individual and interactive influence of selenate and sulphate on thiol metabolism in seedlings of rice cultivars, satabdi and khitish. Inhibition of ascorbate contents by about 17% on an average, in the test seedlings treated with Se correlated with increased activities of ascorbate peroxidase and ascorbate oxidase in the cultivars. The glutathione levels also increased significantly, on an average by about 102% in roots and 74% in shoots of cv. satabdi compared to a rise, by about 49% in roots and 56% in shoots of cv. khitish. The elevated level of glutathione coincided with the stimulatory influence of Se on its regulatory enzymes. Concomitantly the levels of ?-tocopherol and phytochelatins were also induced in both the test cultivars. Increase in ?-tocopherol activity reached a maximum by about 47% in roots and 80% in shoots of cv. satabdi whereas it increased by about 36% in roots and about 64% in shoots of cv. khitish. Substantive increase in the levels of PC4 followed by PC2 and PC3 was also noted. The effects were found to be less conspicuous in shoots than in roots. Rice seedlings exposed to combined Se and 10mM sulphate treatments showed improved growth and development as a result of better thiol metabolism due to amelioration of the adverse effects caused by selenium alone on all the parameters tested.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 58%

Section: Discussionmentioning

confidence: 99%

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Modulation of ascorbate-glutathione cycle by selenate and sulphate treatments in the seedlings of two rice (Oryza sativa L.) cultivars

Das¹,

Seal

Biswas

et al. 2020

Plant Sci. Today

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“…In contrast, in an earlier report on green alga Ulva fasciata, Se remarkably increased the activity of CAT, GPX, POD and SOD (Zhong et al, 2015). Se induced the expression of GPX and GR under UV stress in Azolla caroliniana (Mostafa and Hassan, 2015). In rice plant and sunflower (Helianthus annus) seedlings, Se alleviated Cd toxicity, and ROS by inducing SOD, POX and CAT (Lin et al, 2012;Saidi et al, 2014).…”

Section: Effect Of Selenium On Isozyme Patterns Of Antioxidant Enzymesmentioning

confidence: 47%

Antioxidant modulation in response to selenium induced oxidative stress in unicellular cyanobacterium Synechococcus elongatus PCC 7942

Saraf¹,

Sao²,

Bagchi³

2017

Afr. J. Microbiol. Res.

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“…In contrast to I, Se is effective in stimulating growth and plant development (Xue et al, 2001;Hartikainen, 2005). Se protects cell membranes against lipid peroxidation influences on tocopherol levels (Xue et al, 2001;Hartikainen, 2005), increases the activity of glutathione peroxidase (GPX) (Xue et al, 2001;Hartikainen, 2005;Pilon-Smits et al, 2009), and increases resistance to ultraviolet light (Mostafa and Hassan, 2015). Indian mustard (Brassica juncea) plants grown with Se showed repellent properties against herbivory by caterpillars (Pieris rapae) (Hanson et al, 2003).…”

Section: Introductionmentioning

confidence: 99%

Effectiveness of Foliar Biofortification of Carrot With Iodine and Selenium in a Field Condition

Rakoczy-Lelek¹,

Smoleń

Grzanka

et al. 2021

Front. Plant Sci.

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Iodine (I) and selenium (Se) are essential to human and animal development. There is a worldwide deficit of I and Se in the diet of humans, as well as in animals. It is advisable to enrich plants with these elements to ensure adequate uptake in animals and humans. The aim of this study was to determine the efficacy of the application of I and Se in the cultivation of carrot crops, to better understand the metabolic pathways and processes of I applied through foliar spray. Carrots were fertilized with 4-fold foliar applications of I and Se, which were applied as the liquid fertilizers “I + Se”, “Solo iodine” and “Solo selenium”, all containing an organic stabilizer, in two field trials. Foliar nutrient applications of I and Se were translocated by the plant for storage in the roots. The level of enriched I and Se in the roots was considered safe for the consumer. The Recommended Daily Allowance values for I and Se in the roots of 100 g of fresh carrots are 4.16% and 4.37%, respectively. Furthermore, I and Se accumulated in the roots to a level that was physiologically tolerated by carrot. Biofortification through foliar feeding did not impact negatively on the yield or quality of the carrot crop. Iodides applied via foliar application were the dominant form of I in the plant tissues and were included in the metabolic process of the synthesis of iodosalicylates, iodobenzoates, iodotyrosine (I-Tyr), and plant-derived thyroid hormone analogs. No synergistic or antagonistic interaction between I and Se, with respect to the effectiveness of biofortification in roots, was observed in any treatments. The molar ratio of I:Se in the roots after foliar application of both elements was approximately 1.6:1 and was similar to the control (1.35:1).

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

Cited by 6 publications

References 44 publications

Modulation of ascorbate-glutathione cycle by selenate and sulphate treatments in the seedlings of two rice (Oryza sativa L.) cultivars

Modulation of ascorbate-glutathione cycle by selenate and sulphate treatments in the seedlings of two rice (Oryza sativa L.) cultivars

Antioxidant modulation in response to selenium induced oxidative stress in unicellular cyanobacterium Synechococcus elongatus PCC 7942

Effectiveness of Foliar Biofortification of Carrot With Iodine and Selenium in a Field Condition

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