Effects of Selenium on Plant Metabolism and Implications for Crops and Consumers

Schiavon, Michela; Lima, Leonardo Warzea; Jiang, Ying; Hawkesford, Malcolm J.

doi:10.1007/978-3-319-56249-0_15

Cited by 56 publications

(34 citation statements)

References 106 publications

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“…However, it cannot be excluded that Se additionally upregulates the production of other defense compounds. The interaction between Se and (other) defense compounds is an area that is relatively under-studied [34].…”

Section: Ecological Effects Of Plant-accumulated Se On Ecological mentioning

confidence: 99%

On the Ecology of Selenium Accumulation in Plants

Pilon-Smits

2019

Plants

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Plants accumulate and tolerate Se to varying degrees, up to 15,000 mg Se/kg dry weight for Se hyperaccumulators. Plant Se accumulation may exert positive or negative effects on other species in the community. The movement of plant Se into ecological partners may benefit them at low concentrations, but cause toxicity at high concentrations. Thus, Se accumulation can protect plants against Se-sensitive herbivores and pathogens (elemental defense) and reduce surrounding vegetation cover via high-Se litter deposition (elemental allelopathy). While hyperaccumulators negatively impact Se-sensitive ecological partners, they offer a niche for Se-tolerant partners, including beneficial microbial and pollinator symbionts as well as detrimental herbivores, pathogens, and competing plant species. These ecological effects of plant Se accumulation may facilitate the evolution of Se resistance in symbionts. Conversely, Se hyperaccumulation may evolve driven by increasing Se resistance in herbivores, pathogens, or plant neighbors; Se resistance also evolves in mutualist symbionts, minimizing the plant’s ecological cost. Interesting topics to address in future research are whether the ecological impacts of plant Se accumulation may affect species composition across trophic levels (favoring Se resistant taxa), and to what extent Se hyperaccumulators form a portal for Se into the local food chain and are important for Se cycling in the local ecosystem.

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Section: Ecological Effects Of Plant-accumulated Se On Ecological mentioning

confidence: 99%

On the Ecology of Selenium Accumulation in Plants

Pilon-Smits

2019

Plants

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“…On potato, the Br and Se application has been reported to positively influence photosynthesis (Turakainen et al, 2004). The positive effects of Se concentrations on the photosynthetic process may be explained via the improvement of the cell antioxidant activity at different levels (Schiavon et al, 2017). Table 6.…”

Section: Leaves Chlorophyll and Nutrient Contentsmentioning

confidence: 99%

Potato Growth and Yield Attributes as Affected by Boron and Selenium Foliar Application

Alkharpotly

Roshdy

Mady

2018

Journal of Plant Production

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Enhancing potato growth and yield attributes via both Boron (Br) and Selenium (Se) is a great potential nowadays. Therefore, the present investigation was done to study the effe ct of Boron and Selenium singly or in combination as foliar application on plant growth, yield and quality of two potato cultivars 'Lady Rosetta and Caruso' during both seasons of 2016/2017 and 2017/2018. The experimental layout was split plots system in a randomized complete blocks design with three replications. Cultivars were arranged as the main plots and concentrations of Boron and Selenium singly or in combination were assigned as sub-plots. Boron was sprayed in three concentrations 0, 50, and 100 mg/l whereas Selenium was used at 0, 5, and 10 mg/l concentrations twice at 55 and 70 days after planting. The study indicated that plant growth and yield of potato plants were significantly enhanced by Boron and Selenium treatments. Plant height, tuber dry weight, number of tubers/plant, tuber yield/plant, tuber yield/feddan, tuber TSS %, ascorbic acid, tubers sugars (i.e. starch, reducing, non-reducing and total sugars), leaf total chlorophyll, leaf and tubers contents of N, P, K, Br and Se of both potato cultivars ' Lady Rosetta and Caruso' were significantly enhanced by Boron (100 mg/l) combined with Selenium (5 mg/l) foliar application at 55 and 70 days after planting during both seasons of the study.

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“…Selenium fertilization may alter the synthesis of additional metabolites with recognized nutritional properties, like phenolic acids and amino acids [37,39,40], which are particularly abundant in cruciferous vegetables. Both phenolics and amino acids are N-compounds and Se may affect N metabolism via either interaction with the S pathway and/or reduction of molybdenum (Mo) uptake, Mo being an indispensable cofactor for the activity of nitrate reductase [37,40].…”

Section: Introductionmentioning

confidence: 99%

Selenium Biofortification Differentially Affects Sulfur Metabolism and Accumulation of Phytochemicals in Two Rocket Species (Eruca Sativa Mill. and Diplotaxis Tenuifolia) Grown in Hydroponics

Dall’Acqua

Ertani

Pilon‐Smits

et al. 2019

Plants

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Biofortification can be exploited to enrich plants in selenium (Se), an essential micronutrient for humans. Selenium as selenate was supplied to two rocket species, Eruca sativa Mill. (salad rocket) and Diplotaxis tenuifolia (wild rocket), at 0–40 μM in hydroponics and its effects on the content and profile of sulphur (S)-compounds and other phytochemicals was evaluated. D. tenuifolia accumulated more total Se and selenocysteine than E. sativa, concentrating up to ~300 mg Se kg−1 dry weight from 10–40 μM Se. To ensure a safe and adequate Se intake, 30 and 4 g fresh leaf material from E. sativa grown with 5 and 10–20 μM Se, respectively or 4 g from D. tenuifolia supplied with 5 μM Se was estimated to be optimal for consumption. Selenium supplementation at or above 10 μM differentially affected S metabolism in the two species in terms of the transcription of genes involved in S assimilation and S-compound accumulation. Also, amino acid content decreased with Se in E. sativa but increased in D. tenuifolia and the amount of phenolics was more reduced in D. tenuifolia. In conclusion, selenate application in hydroponics allowed Se enrichment of rocket. Furthermore, Se at low concentration (5 μM) did not significantly affect accumulation of phytochemicals and plant defence S-metabolites.

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Effects of Selenium on Plant Metabolism and Implications for Crops and Consumers

Cited by 56 publications

References 106 publications

On the Ecology of Selenium Accumulation in Plants

On the Ecology of Selenium Accumulation in Plants

Potato Growth and Yield Attributes as Affected by Boron and Selenium Foliar Application

Selenium Biofortification Differentially Affects Sulfur Metabolism and Accumulation of Phytochemicals in Two Rocket Species (Eruca Sativa Mill. and Diplotaxis Tenuifolia) Grown in Hydroponics

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