Nitric-oxide generation induced by metals plays a role in their accumulation by Phallusia nigra hemocytes

Barros, Cíntia Monteiro de; Martins, Danielly da Fonte Carvalho; Mello, Andressa de Abreu; Salgado, Leonardo T.; Allodi, Silvana

doi:10.1016/j.marpolbul.2017.06.043

Cited by 4 publications

(3 citation statements)

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“…If the concentration of heavy metals keeps increasing in longer exposure period, they can readily enter the food chains via their accumulation because some heavy metal is water soluble. Prolonged exposure to the mineral is also poisonous and harmful to the fitness of most insects, causing changes in eating habits, fertility, immunity, and overall survival (de Barros et al 2017;Kula et al 2014;Martinek, Kula & Hedbávný 2018;Olsén 2011). In general, P. microcephalum and I. senegalensis larvae are generally resistant to elevated levels of heavy metal toxicity in aqueous medium.…”

Section: Discussionmentioning

confidence: 99%

Untitled

2023

JSM

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Contamination by pollutants in freshwater ecosystem has been identified extensively in river, sediments, and freshwater biota. Pollutants may have incorporated into the sediments and accumulated in tissue of aquatic organisms which persist as difficult to degrade matter in upper trophic level. Therefore, few selected heavy metals were measured from the river sediment and tissue of damselflies larvae collected from the selected rivers using inductively coupled plasma optical emission spectrometry (ICP-OES). The results showed metals in damselflies tissue were higher than in the sediments. Mn and Zn were found in greatest concentrations both in sediment and damselflies 's tissue. Biotasediment accumulation factors (BSAF) were computed based on these data, and it was discovered that all values of BSAF for Cd, Cu, Mn, and Zn were typically high (BSAF >1). In conclusion, the rivers contamination induced accumulation of heavy metal in the river sediments and damselflies larvae (Pseudagrion microcephalum, Pruinosum fraseri, and Copera marginipes). The highest concentration value was calculated as 29.23 for Cd in the C. marginipes. The high concentrations of this element in the insect body tissue has shown a trace of bioaccumulation and may pose biomagnification to organisms in the upper trophic level. The results of this study indicated that damselfly is reliable to become a bioindicator for heavy metals particularly pollution in the river.

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Section: Discussionmentioning

confidence: 99%

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2023

JSM

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“…Manganese (Mn) also plays a part in the development and behavior of insects through various molecular and physiological processes. Even though manganese is essential for life, prolonged exposure to the mineral is also poisonous and harmful to the fitness of most insects, affecting feeding habits, fertility, immunity, and overall survival (de Barros et al, 2017;Martinek et al, 2018;Ben-Shahar, 2018).…”

Section: Discussionmentioning

confidence: 99%

Toxicity Assessment on Odonata Larvae Survivability in Monitoring Heavy Metal Contaminations

Ab Hamid,

Jumaat

2023

MAB

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The aquatic ecosystem has been suffering a continuous increase of metal contamination such as Cadmium (Cd), Zinc (Zn), and Manganese (Mn) due to their inadequate high potential to disturb the aquatic organism population. Meanwhile, some insects such as Pseudagrion microcephalum and Ischnura senegalensis can be used as biological indicators to determine stream health. Therefore, this study was conducted to determine the relationship between the heavy metal concentration and its effect on the survivability of two different species of damselfly larvae from the family Coenagrionidae; Pseudagrion microcephalum and Ischnura senegalensis. In this study, there is a significant effect of three heavy metal exposures on the survivability of P.microcephalum (F11,180=14.50, P=0.00) and I.senegalensis (F11,180 =15.10, P=0.00). Pseudagrion microcephalum is more tolerable towards Mn (F3,60=13.19, P=0.00) and Zn (F3,60=16.07, P=0.00) at different concentrations compared to I.senegalensis. In the meantime, I.senegalensis was tolerable to Cd exposure. The LC50 value of Cd was much lower than other heavy metals. Besides, the LT50 value of Cd at 200 mg/L was the lowest on P. microcephalum (31 hr) and I. senegalensis (36 hr) compared to other heavy metals. Cd was the most toxic to P.microcephalum and I.senegalensis larvae followed by zinc and manganese (LC50 & LT50=Cd > Zn > Mn). It is concluded that I.senegalensis was tolerant towards Cd, Mn, and Zn compared to P.microcephalum and Cd had the fastest-acting toxicity and significantly reduced the lethal time of mortality on both species.

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“…Although essential, chronic dietary exposure to Mn is often toxic and detrimental to the fitness of most arthropod species, including insects, via effects on embryonic development, feeding behaviors, reproduction, immunity, and general survivability ( Olsén, 2011 ; Kula et al, 2014 ; Ternes et al, 2014 ; de Barros et al, 2017 ; Martinek et al, 2018 ). For example, the collembolan Folsomia candida is highly sensitive to Mn in its diet ( Kuperman et al, 2004 ).…”

Section: Manganese and Insect Biologymentioning

confidence: 99%

The Impact of Environmental Mn Exposure on Insect Biology

Ben‐Shahar

2018

Front. Genet.

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Manganese (Mn) is an essential trace element that acts as a metal co-factor in diverse biochemical and cellular functions. However, chronic environmental exposure to high levels of Mn is a well-established risk factor for the etiology of severe, atypical parkinsonian syndrome (manganism) via its accumulation in the basal ganglia, pallidum, and striatum brain regions, which is often associated with abnormal dopamine, GABA, and glutamate neural signaling. Recent studies have indicated that chronic Mn exposure at levels that are below the risk for manganism can still cause behavioral, cognitive, and motor dysfunctions via poorly understood mechanisms at the molecular and cellular levels. Furthermore, in spite of significant advances in understanding Mn-induced behavioral and neuronal pathologies, available data are primarily for human and rodents. In contrast, the possible impact of environmental Mn exposure on brain functions and behavior of other animal species, especially insects and other invertebrates, remains mostly unknown both in the laboratory and natural habitats. Yet, the effects of environmental exposure to metals such as Mn on insect development, physiology, and behavior could also have major indirect impacts on human health via the long-term disruptions of food webs, as well as direct impact on the economy because of the important role insects play in crop pollination. Indeed, laboratory and field studies indicate that chronic exposures to metals such as Mn, even at levels that are below what is currently considered toxic, affect the dopaminergic signaling pathway in the insect brain, and have a major impact on the behavior of insects, including foraging activity of important pollinators such as the honey bee. Together, these studies highlight the need for a better understanding of the neuronal, molecular, and genetic processes that underlie the toxicity of Mn and other metal pollutants in diverse animal species, including insects.

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Nitric-oxide generation induced by metals plays a role in their accumulation by Phallusia nigra hemocytes

Cited by 4 publications

References 50 publications

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Toxicity Assessment on Odonata Larvae Survivability in Monitoring Heavy Metal Contaminations

The Impact of Environmental Mn Exposure on Insect Biology

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