Decomposição do NO sobre Cu suportado em zeólitas

Oliveira, Andréa Marins de; Pergher, Sibele Berenice Castellã; Moro, Celso Camilo; Baibich, Ione Maluf

doi:10.1590/s0100-40422004000200010

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…One of these pigments is melanin, which occurs in cells called melanocytes. These cells produce and store melanin (Agius and Roberts, 2003; Oliveira and Franco-Belussi, 2012) and are similar to skin melanocytes (Zuasti et al, 1998; Franco-Belussi et al, 2013). Melanocytes occur in internal organs and membranes of amphibians (Oliveira and Franco-Belussi, 2012) and fish (Agius, 1981).…”

Section: Introductionmentioning

confidence: 99%

Environmental correlates of internal coloration in frogs vary throughout space and lineages

Franco‐Belussi

Provete

Oliveira

2017

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SummaryInternal organs of ectotherms have melanin-containing cells. Several studies analyzed their developmental origin, role in immunity, and hormonal regulation. However, little is known about how environmental variables influence the distribution and quantity of organ coloration. Here, we addressed how environmental variables (temperature, UV, and photoperiod) influence the internal coloration of amphibians after controlling for spatial and phylogenetic autocorrelations. Coloration in all organs was correlated with phylogeny. However, the coloration of the heart, kidneys, and rectum of hylids, R. schneideri, some Leptodactylus, and Proceratophrys were influenced by temperature and photoperiod, whereas that of the testicle, lumbar parietal peritoneum, lungs, and mesenterium of Leiuperinae, Hylodidae, Adenomera, most Leptodactylus were influenced by UVB and temperature variation. Therefore, the amount of internal melanin seems to be a key trait influencing species distribution of frogs throughout space, since it can protect internal organs against the deleterious effect of high UV-B, temperature variation, and photoperiod.SignificanceThe functions of internal coloration in fishes and frogs are little known. Internal pigmentation is commonly altered in fish and the degree of response is correlated with body transparency levels, suggesting possible adaptive functions. Here, we assume that internal melanin has protective functions against UV-B, temperature variation, and photoperiod. Thus it could influence frogs species distribution throughout space. The melanin coloration of each organ was influenced by distinct environmental variables depending on the lineages of species. Our results could direct further studies about the functions of internal coloration.

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Section: Introductionmentioning

confidence: 99%

Environmental correlates of internal coloration in frogs vary throughout space and lineages

Franco‐Belussi

Provete

Oliveira

2017

Preprint

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“…The area and occurrence of melanomacrophages in the liver increase in response to environmental stressors, such as temperature (Santos et al, 2014), UV radiation (Franco-Belussi et al, 2016), and xenobiotics (Pérez-Iglesias et al, 2016). In addition to melanin, MMs contain catabolic substances originated from the degradation of red blood cells: hemosiderin and lipofuscin, originated from the degradation of polyunsaturated membrane lipids (Oliveira and Franco-Belussi 2012). Therefore, the density of melanomacrophages can be a useful morphological biomarker for the effect of environmental stressors (Oliveira et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Idiosyncratic liver alterations of five frog species to land use changes in the Brazilian Cerrado

Franco‐Belussi

Provete

Borges

et al. 2019

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Title Page  Changes in land use promote amphibian declines worldwide  Our study focused on the biosphere, anthroposphere, and hydrosphere  We used method to test for trait-environment relationship  Species responded differently to land use change  Land use change can affect internal morphology and physiology of organisms*Highlights (for review : 3 to 5 bullet points (maximum 85 characters including spaces per bullet point) 1 1 Abstract 2 Changes in land use trigger environmental changes that can lead to decreased 3 biodiversity and species loss. The liver is an essential detoxification organ that reflects 4 systemic physiological responses to environmental changes. Here, we tested whether 5 land use changes influence the amount of substances from the hepatic cellular 6 catabolism and melanomacrophages of five anuran species in the Brazilian Cerrado. We 7 used routine histological and histochemical techniques. We then use recently developed 8 ecological methods to relate functional traits to environmental variables. There was an 9 increase in the amount of melanin in environments with high proportion of agriculture, 10 as well as variation in the amount of lipofuscin and hemosiderin. Therefore, the area of 11 melanomacrophages in the liver and the metabolic products in their cytoplasm can be 12 used as biomarkers of environmental contamination in regions with intense agricultural 13 activities. Our results add a new perspective to the influence of land use changes on 14 environmental health by highlighting the effect of environmental changes on internal 15 morphological aspects of animals.16

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