Selenium Sorption by Some Selenotolerant Fungi

Ragab, Ahmed; Ramadan, Shadia E.; Razak, A. A.; Ghonamy, E.A.

doi:10.1007/978-94-009-4321-6_26

Cited by 6 publications

(2 citation statements)

References 3 publications

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“…The vegetative growth of A. flavus was inhibited with the increasing of the Se concentration, but the spores could not likely be damaged by selenite but only inhibited during germination (Zohri et al, 1997). In addition, high Se concentrated treatments led to the morphological distortion of fungal structure and deformities (Ragab et al, 1986;Li et al, 2003). Addition of different Se compounds to the toxin induction medium not only delays the growth of F. graminearum and reduces the diameter of colony, but also significantly inhibits the accumulation of deoxinivalenol (Mao et al, 2020b).…”

Section: Se Inhibits Fungal Pathogen Growthmentioning

confidence: 99%

“…The overlap of blue and green pies shows that Se has interactive impacts on Fusarium graminearum, and the overlap of all pies shows the overall impact of Se on Sclerotinia sclerotiorum. Aspergillus flavus Brazil nut Aspergillus flavus disease (Ragab et al, 1986;Zohri et al, 1997;Li et al, 2003;Pacheco and Scussel, 2007) Na 2 SeO 3 , Na 2 SeO 4 (10 mg L -1 ) Se-nanoparticles (100 mg L -1 )…”

Section: Se Inhibits Fungal Pathogen Growthmentioning

confidence: 99%

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The use of selenium for controlling plant fungal diseases and insect pests

Xian²,

Yuan³

et al. 2023

Front. Plant Sci.

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The selenium (Se) applications in biomedicine, agriculture, and environmental health have become great research interest in recent decades. As an essential nutrient for humans and animals, beneficial effects of Se on human health have been well documented. Although Se is not an essential element for plants, it does play important roles in improving plants’ resistances to a broad of biotic and abiotic stresses. This review is focused on recent findings from studies on effects and mechanisms of Se on plant fungal diseases and insect pests. Se affects the plant resistance to fungal diseases by preventing the invasion of fungal pathogen through positively affecting plant defense to pathogens; and through negative effects on pathogen by destroying the cell membrane and cellular extensions of pathogen inside plant tissues after invasion; and changing the soil microbial community to safeguard plant cells against invading fungi. Plants, grown under Se enriched soils or treated with Se through foliar and soil applications, can metabolize Se into dimethyl selenide or dimethyl diselenide, which acts as an insect repellent compound to deter foraging and landing pests, thus providing plant mediated resistance to insect pests; moreover, Se can also lead to poisoning to some pests if toxic amounts of Se are fed, resulting in steady pest mortality, lower reproduction rate, negative effects on growth and development, thus shortening the life span of many insect pests. In present manuscript, reports are reviewed on Se-mediated plant resistance to fungal pathogens and insect pests. The future perspective of Se is also discussed on preventing the disease and pest control to protect plants from economic injuries and damages.

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Section: Se Inhibits Fungal Pathogen Growthmentioning

confidence: 99%

Section: Se Inhibits Fungal Pathogen Growthmentioning

confidence: 99%

The use of selenium for controlling plant fungal diseases and insect pests

Xian²,

Yuan³

et al. 2023

Front. Plant Sci.

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Copper organo-chelators inAspergillus fumigatus andPenicillium chrysogenum

El-Meleigy

1992

Biol Trace Elem Res

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The presence of copper in the growth medium induces the biosynthesis of several low-mol-wt copper ogano-chelators in Aspergillus fumigatus and Penicillium chrysogenum. By use of P. chrysogenum, we were able to prepare several low-mol-wt metallothionein chelators, as well as several short-chain copper chelatins. The amino acid composition of a chelatin of mol wt approx 799 Da revealed the presence of cysteine, glutamic acid, glycine, and leucine. Use of A. fumigatus led to fewer copper chelators and one very short-chain peptide: a chelatin of mol wt approx 624 Da. composed of four amino acids, asparagine, glutamic acid, cysteine, and glycine. These results may confirm our assumption that fungi detoxify the deleterious action of toxic elements by producing high levels of heavy metal chelators/chelatins.

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Selenium metabolism in a strain ofFusarium

Ramadan

Razak

Yousseff

et al. 1988

Biol Trace Elem Res

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Fusarium sp. was isolated from Sinai soil at Egypt. It showed tendency to tolerate high concentrations of selenium in the form of sodium selenite up to 3.5% (w/v). The microscopic examination revealed some morphological distortions. However, the fungus was capable to circumvent the toxic effect of selenium. The fungus possess strong reducing ability as high quantities of elemental selenium were precipitated within the fungal cells as well as on the surface of the fungal hyphae and spores. The presence of selenium increased the cellular contents of carbohydrates, proteins, and lipids. Labeling studies indicate the incorporation of selenite into certain amino acids: selenocysteine and selenocysteic acid. Moreover, the presence of selenium induced the biosynthesis of several types of low molecular weight proteins. The results demonstrated different modes of detoxification of selenium toxicity.

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Selenium Sorption by Some Selenotolerant Fungi

Cited by 6 publications

References 3 publications

The use of selenium for controlling plant fungal diseases and insect pests

The use of selenium for controlling plant fungal diseases and insect pests

Copper organo-chelators inAspergillus fumigatus andPenicillium chrysogenum

Selenium metabolism in a strain ofFusarium

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