Selenium and the elemental defense hypothesis

Trumble, John T.; Sorensen, Mary A.

doi:10.1111/j.1469-8137.2008.02353.x

Cited by 19 publications

(6 citation statements)

References 17 publications

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“…Results from this study show that high-Se litter from hyperaccumulator A. bisulcatus (350-550 mg Se kg −1 DW) lost more weight than low-Se litter (1-2 mg Se kg −1 DW) from A. drummondii and M. sativa after 8 and 12 months of decomposition in the seleniferous habitat Pine Ridge Natural Area. Since the high-Se litter Se levels are toxic to most invertebrates and many microbes (for a review see Trumble and Sorensen 2008), it appears that Se-tolerant decomposers have evolved in this seleniferous habitat and these may specialize in decomposing high-Se leaf litter. Such Se-tolerant decomposers may even benefit from the ingested Se via protection from predators or pathogens, or metabolically (Se can protect many organisms against toxic free radicals (Iman et al 1999)).…”

Section: Discussionmentioning

confidence: 99%

Enhanced decomposition of selenium hyperaccumulator litter in a seleniferous habitat—evidence for specialist decomposers?

et al. 2010

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Selenium (Se) hyperaccumulation, when plant species accumulate upwards of 1,000 mg Se kg −1 dry weight (DW), protects plants from a variety of herbivores and pathogens. The objective of this study was to determine the effect of plant Se concentration on the rate of litter decomposition by invertebrates and microbes in a seleniferous habitat. Decomposition, Se loss, the decomposer community and soil Se concentration beneath leaf litter were compared between litter from two populations of the Se hyperaccumulator Astragalus bisulcatus (one population with 350 and the other with 550 mg Se kg −1 DW) and from the related non-accumulator species Astragalus drummondii and Medicago sativa containing 1-2 mg Se kg −1 DW using a litterbag method. High-Se litter decomposed faster than lowSe litter and supported more microbes and arthropods than low-Se leaf litter after 8 and 12 months, respectively. Soil collected from under high-Se litter had higher Se concentration than soil from beneath low-Se litter after 8 months. The higher decomposition rate and abundance of decomposers in highSe litter indicates the presence of Se-tolerant decomposers in this seleniferous habitat that may have contributed to increased decomposition rates of high-Se litter.

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Section: Discussionmentioning

confidence: 99%

Enhanced decomposition of selenium hyperaccumulator litter in a seleniferous habitat—evidence for specialist decomposers?

et al. 2010

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“…In addition, some relatively non-toxic organic and inorganic salts such as potassium silicate and calcium chloride have been investigated for inhibition of fungal pathogens on fruits, vegetables, field crops, and ornamentals ( Hervieux et al, 2002 ; Shi et al, 2011 ; Yaganza et al, 2014 ). Though selenium (Se) has been found to be beneficial to plants, its effect on plant–disease interaction has little been evaluated, and there are few investigations on Se salt treatment for control of plant diseases ( Hanson et al, 2003 ; Trumble and Sorensen, 2008 ; Companioni et al, 2012 ).…”

Section: Introductionmentioning

confidence: 99%

Effect of Selenium on Control of Postharvest Gray Mold of Tomato Fruit and the Possible Mechanisms Involved

Yin

Bañuelos

et al. 2016

Front. Microbiol.

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Selenium (Se) has important benefits for crop growth and stress tolerance at low concentrations. However, there is very little information on antimicrobial effect of Se against the economically important fungus Botrytis cinerea. In the present study, using sodium selenite as Se source, we investigated the effect of Se salts on spore germination and mycelial growth of the fungal pathogen in vitro and gray mold control in harvested tomato fruit. Se treatment at 24 mg/L significantly inhibited spore germination of the fungal pathogen and effectively controlled gray mold in harvested tomato fruit. Se treatment at 24 mg/L seems to induce the generation of intracellular reactive oxygen species in the fungal spores. The membrane integrity damage was observed with fluorescence microscopy following staining with propidium iodide after treatment of the spores with Se. These results suggest that Se has the potential for controlling gray mold rot of tomato fruits and might be useful in integrated control against gray mold disease of postharvest fruits and vegetables caused by B. cinerea. The mechanisms by which Se decreased gray mold decay of tomato fruit may be directly related to the severe damage to the conidia plasma membrane and loss of cytoplasmic materials from the hyphae.

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“…Among of them, mineral nutrition such as silicon (Si) has long been recognized as an important component of disease control practices, which impacts plant disease tolerance or resistance ( Datnoff et al, 2007 ; Fones et al, 2010 ; Yao et al, 2012 ; Fones and Preston, 2013 ; Hörger et al, 2013 ; Kaur et al, 2016 ; Morkunas et al, 2018 ; Cabot et al, 2019 ; Jali et al, 2019 ; Liu et al, 2022 ). Solid research evidences demonstrate that the amounts of trace element nutrient Se in plants improve the plant growth and increase the tolerance against biotic and abiotic stress ( Razak et al, 1991 ; Poschenrieder et al, 2006 ; Boyd, 2007 ; Freeman et al, 2007 ; Trumble and Sorensen, 2008 ; Pilon-Smits et al, 2009 ; Zhao and McGrath, 2009 ; Zhu et al, 2009 ; Winkel et al, 2011 ; Wu et al, 2015 ; Hossain et al, 2021 ) and appropriate Se can significantly enhance the antioxidant enzyme activities in plants and reduce the activities of reactive oxygen species (ROS) and also the levels of lipid peroxidation, which could enhance the antioxidant enzyme activities in plants ( Feng et al, 2013 ; Lanza et al, 2021 ). Selenium could control the Sclerotinia stem rot disease of plants by regulating the soil microorganism community ( Liu et al, 2019a ).…”

Section: Discussionmentioning

confidence: 99%

“…The recent information regarding the effect of nutrition on disease tolerance or resistance has been reported by others ( Boyd, 2007 ; Dordas, 2008 ; Fones et al, 2010 ; Shi et al, 2011 ; Yao et al, 2012 ; Fones and Preston, 2013 ; Hörger et al, 2013 ; Yaganza et al, 2014 ; Vilaplana et al, 2018 ; Brown et al, 2021 ). Among those minerals, micronutrient selenium (Se) is an essential trace element for humans and animals at low concentrations, has been found to be beneficial to plants; its effect on the plant–pathogen interactions has little been evaluated, and there are few investigations on Se being used for controlling plant diseases ( Hanson et al, 2003 ; Bañuelos, 2006 ; Trumble and Sorensen, 2008 ; Pilon-Smits et al, 2009 ; Zhao and McGrath, 2009 ; Zhu et al, 2009 , 2016 , 2017 ; Hasanuzzaman et al, 2010 ; Wu et al, 2014 , 2015 , 2016 ; Abdel-Moneim et al, 2022 ). Therefore, the application of Se at low concentration as possible alternative to synthetic fungicides for the control of plant diseases and producing Se-biofortified agricultural products ( Wu et al, 2015 , 2016 ; Schiavon and Pilon-Smits, 2017 ).…”

Section: Introductionmentioning

confidence: 99%

Synergistic Effect of Melatonin and Selenium Improves Resistance to Postharvest Gray Mold Disease of Tomato Fruit

Zang

et al. 2022

Front. Plant Sci.

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Melatonin (MT) is a ubiquitous hormone molecule that is commonly distributed in nature. MT not only plays an important role in animals and humans but also has extensive functions in plants. Selenium (Se) is an essential micronutrient for animals and humans, and is a beneficial element in higher plants at low concentrations. Postharvest diseases caused by fungal pathogens lead to huge economic losses worldwide. In this study, tomato fruits were treated with an optimal sodium selenite (20 mg/L) and melatonin (10 μmol/L) 2 h and were stored for 7 days at room temperature simulating shelf life, and the synergistic effects of Se and MT collectively called Se-Mel on gray mold decay in tomato fruits by Botrytis cinerea was investigated. MT did not have antifungal activity against B. cinerea in vitro, while Se significantly inhibited gray mold development caused by B. cinerea in tomatoes. However, the interaction of MT and Se showed significant inhibition of the spread and growth of the disease, showing the highest control effect of 74.05%. The combination of MT with Se treatment enhanced the disease resistance of fruits by improving the activities of superoxide dismutase (SOD), peroxidase (POD), and catalase (CAT), as well as increasing the gene expression level of pathogenesis-related (PR) proteins. Altogether, our results indicate that the combination of MT and Se would induce the activation of antioxidant enzymes and increase the expression of PR proteins genes that might directly enhance the resistance in tomato fruit against postharvest pathogenic fungus B. cinerea.

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Selenium and the elemental defense hypothesis

Cited by 19 publications

References 17 publications

Enhanced decomposition of selenium hyperaccumulator litter in a seleniferous habitat—evidence for specialist decomposers?

Enhanced decomposition of selenium hyperaccumulator litter in a seleniferous habitat—evidence for specialist decomposers?

Effect of Selenium on Control of Postharvest Gray Mold of Tomato Fruit and the Possible Mechanisms Involved

Synergistic Effect of Melatonin and Selenium Improves Resistance to Postharvest Gray Mold Disease of Tomato Fruit

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