Effects of selenium accumulation on phytotoxicity, herbivory, and pollination ecology in radish (Raphanus sativus L.)

Hladun, Kristen R.; Parker, David R.; Tran, Khoa D.; Trumble, John T.

doi:10.1016/j.envpol.2012.08.009

Cited by 74 publications

(61 citation statements)

References 41 publications

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“…By exposing bees to cadmium, copper, hydrogen peroxide, imidacloprid or selenate, we show that each toxicant is lethal to bumble bees at varying concentrations - following the mantra that the dose makes the poison. For example, constant ingestion of selenate and cadmium at levels that bees may encounter on flowers grown in polluted soils are toxic even on the third day of chronic exposure (105,106). Bees were more tolerant of copper, with lethal doses higher than the levels likely encountered when foraging on plants in contaminated areas (106).…”

Section: Discussionmentioning

confidence: 99%

The direct and indirect effects of environmental toxicants on the health of bumble bees and their microbiomes

Rothman

Russell

Leger

et al. 2020

Preprint

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Bumble bees (Bombus spp.) are important and widespread insect pollinators, but the act of foraging on flowers can expose them to harmful pesticides and environmental chemicals such as oxidizers and heavy metals. How these compounds directly influence bee survival and indirectly affect bee health via the gut microbiome is largely unknown. As the toxins and toxicants in floral nectar and pollen take many forms, we explored the genomes of core bumblebee microbes (Using RAST) for their potential to detoxify cadmium, copper, selenium, the neonicotinoid pesticide imidacloprid, and hydrogen peroxide - which have all been identified in floral nectar and pollen. We then exposed Bombus impatiens workers to varying concentrations of these chemicals spiked into their diet and identified the direct effects on bee survival. Using field realistic doses, we further explored indirect effects on bee microbiomes. We found multiple genes in core gut microbes that have the potential to aid in detoxifying harmful chemicals. We also found that while the chemicals are largely toxic at levels within and above field-realistic concentrations, the field-realistic concentrations - except for imidacloprid - altered the composition of the bee microbiome, potentially causing gut dysbiosis. Overall, our study shows that environmental chemicals found in floral nectar and pollen can directly cause bee mortality, and at field-realistic levels, likely have indirect, deleterious effects on bee health via their influence on the bee microbiome.

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Section: Discussionmentioning

confidence: 99%

The direct and indirect effects of environmental toxicants on the health of bumble bees and their microbiomes

Rothman

Russell

Leger

et al. 2020

Preprint

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“…Other metal pollutants such as selenium were not shown to affect pollinator behaviour at flowers (Hladun et al . ), which may have negative effects on plant–pollinator interactions if metal toxicity reduces bee fitness or pollinator availability to plants.…”

Section: Environmental Contaminantsmentioning

confidence: 99%

Urban drivers of plant‐pollinator interactions

2015

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Summary1. Plant-pollinator interactions are affected by global change, with largely negative impacts on pollination and plant reproduction. Urban areas provide a unique and productive study system for understanding the impacts of many global change drivers on plant-pollinator interactions. 2. We review the mechanistic pathways through which urban drivers alter plant-pollinator interactions. The literature on urban drivers of plant-pollinator interactions is small but growing and has already produced exciting insights about how population processes or pollinator behaviour interacts with landscape urban drivers to affect pollination outcomes. 3. Habitat loss and fragmentation can change flower visitation rates and pollination success through changes in pollinator foraging behaviour or through population-level effects on pollinators. Urban environments, where impermeable surface provides an inhospitable matrix, may allow researchers to identify habitat fragments more clearly than in many other environments. 4. Recent studies have found that non-native plants are not differently preferred by pollinators relative to native plants, therefore removing the basis for expecting pollinator-mediated competition between native and non-native plants in urban habitats. However, non-native species together with managed vegetation may have powerful effects in urban habitats via changes in community-level plant phenology and consequent changes in pollinator phenology. 5. The current level of climate warming has not caused plants and pollinators to become detectably temporally separated, although at the same time, diversity among species' phenological responses could buffer plant-pollinator interactions from climate variation. Due to the urban warming effect, cities provide a promising system for better understanding the warming effects on plant-pollinator interactions. 6. Environmental contaminants such as soil nitrogen and heavy metal pollution have been examined with respect to plant-pollinator interactions in small-scale, mechanistic studies. The extent to which environmental contaminants drive plant-pollinator interactions in actual urban landscapes is, however, currently unknown. 7. Important knowledge gaps that require research attention include understanding the consequences of plant and pollinator trait filtering on plant-pollinator interactions, and expanding the literature to include underrepresented biomes and pollinator taxa.

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“…Several studies confirmed the positive role of soil Se fertilization in various crops/plants such as rice, 46,123 maize, 124 wild barley 125 and soybean. 126 Foliar Se application has been reported to significantly promote growth in vegetables such as onion bulbs and leaves, 127 carrot roots and leaves, 128 radish flowers and leaves, 129 as well as garlic bulbs 130 and in cereals like wheat. , 51,92 The uptake and accumulation of Se within a narrow range are beneficial for plants 131 and are determined by the plant's ability to absorb and metabolize Se.…”

Section: Selenium and Plant Drought Tolerancementioning

confidence: 99%

Selenium (Se) improves drought tolerance in crop plants – a myth or fact?

et al. 2015

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Climate change has emerged as one of the most complex challenges of the 21st century and has become an area of interest in the past few decades. Many countries of the world have become extremely vulnerable to the impacts of climate change. The scarcity of water is a serious concern for food security of these countries and climate change has aggravated the risks of extreme events like drought. Oxidative stress, caused by a variety of active oxygen species formed under drought stress, damages many cellular constituents, such as carbohydrates, lipids, nucleic acids and proteins, which ultimately reduces plant growth, respiration and photosynthesis. Se has become an element of interest to many biologists owing to its physiological and toxicological importance. It plays a beneficial role in plants by enhancing growth, reducing damage caused by oxidative stress, enhancing chlorophyll content under light stress, stimulating senesce to produce antioxidants and improving plant tolerance to drought stress by regulating water status. Researchers have adopted different strategies to evaluate the role of selenium in plants under drought stress. Some of the relevant work available regarding the role of Se in alleviating adverse effect of drought stress is discussed in this paper.

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Effects of selenium accumulation on phytotoxicity, herbivory, and pollination ecology in radish (Raphanus sativus L.)

Cited by 74 publications

References 41 publications

The direct and indirect effects of environmental toxicants on the health of bumble bees and their microbiomes

The direct and indirect effects of environmental toxicants on the health of bumble bees and their microbiomes

Urban drivers of plant‐pollinator interactions

Selenium (Se) improves drought tolerance in crop plants – a myth or fact?

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