Flora das cangas da Serra dos Carajás, Pará, Brasil: Convolvulaceae

Simão-Bianchini, Rosângela; Vasconcelos, Liziane Vilela; Pastore, Mayara

doi:10.1590/2175-7860201667530

Cited by 26 publications

(32 citation statements)

References 10 publications

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“…Farmers' reports suggest that sheep are also poisoned spontaneously, however, in this species, acute bloat outbreaks have not been identified and need to be investigated. In addition, due to the Merremia macrocalyx occurrence throughout the Brazilian national territory (Simão-Bianchini et al 2016, Ferreira & Miotto 2013, veterinarians from other states should be vigilant and should include M. macrocalyx poisoning in the differential diagnosis when outbreaks of tympanism are observed in cattle.…”

Section: Discussionmentioning

confidence: 99%

“…Merremia genus encompasses a range of 80 species occurring throughout tropical and subtropical regions (Austin 1982). In Brazil 14 of these species can be found in different environments and locations such as forest borders, countrysides and wastelands (Austin 1982, Simão-Bianchini et al 2016. Merremia macrocalyx belongs to the Convolvulaceae family, it is a herbaceous climbing plant capable of flowering and growing fruits all year round, mainly in the summer, and can be found in the Americas, extending from the United States to Argentina (O'Donell 1941).…”

Section: Introductionmentioning

confidence: 99%

“…Merremia macrocalyx belongs to the Convolvulaceae family, it is a herbaceous climbing plant capable of flowering and growing fruits all year round, mainly in the summer, and can be found in the Americas, extending from the United States to Argentina (O'Donell 1941). Considered an invasive plant (Lorenzi 1982, Kissmann & Groth 1992, Lorenzi & Souza 1999, M. macrocalyx has already been found in all Brazilian states (Simão-Bianchini et al 2016, Ferreira & Miotto 2013.…”

Section: Introductionmentioning

confidence: 99%

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Spontaneous and experimental poisoning by Merremia macrocalyx (Convolvulaceae) in cattle

et al. 2019

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The aim of this work was to describe the epidemiological, clinical and pathological aspects of spontaneous poisoning by Merremia macrocalyx in cattle in the Pernambuco state, northeastern Brazil, and to experimentally replicate the poisoning by this plant. To determine the occurrence of poisonings, 30 farms were visited in six municipalities at the Forest Zone of Pernambuco. The plant was found in nine farms, in which history of plant poisoning in cattle, and occasionally in sheep were also reported. Three outbreaks of spontaneous poisonings in cattle were studied. To replicate the disease experimentally, two steers received a single dose of 60g/kg and two steers received 80g/kg of the fresh leaves of M. macrocalyx in the trough for spontaneous ingestion. Two steers were also used as a control group. The main clinical signs observed in spontaneous cases consisted of restlessness, bloat, polyuria, diarrhea, and death within 48 to 72 hours after the onset of clinical signs. Cattle experimentally poisoned presented similar clinical signs to those observed in spontaneous cases. Gross lesions consisted of dryness and impaction of the rumen, omasum and reticulum contents. Abomasal content was fluid, the mucosa was hyperemic, with swollen folds and multiple ulcers. Similar lesions were observed in duodenum mucosae. Histologically, lesions observed in the abomasum and duodenum mucosa consisted of necrosis, hemorrhage and inflammatory infiltration of neutrophils and lymphocytes. The wide distribution and palatability of this plant, associated with the high sensitivity of the bovine species verified in this experiment, highlight the importance of this plant in spontaneous cases of poisoning in cattle.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Spontaneous and experimental poisoning by Merremia macrocalyx (Convolvulaceae) in cattle

et al. 2019

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“…(Lohmann et al, 2018), Blechnaceae (Salino et al, 2017), Convolvulaceae, 3 spp. (Simão-Bianchini et al, 2016), Cyperaceae, 3 spp. (Nunes et al, 2016), Eriocaulaceae, 2 spp.…”

Section: List Comparisonmentioning

confidence: 99%

“…Borreria semiamplexicaulis and Ipomoea marabaensis were included as Rare for Brazil (Giulietti et al, 2009). However, these occur in other areas of the state of Pará and elsewhere (Zappi et al, 2017a), with I. marabaensis also occurring in Tocantins (Simão-Bianchini et al, 2016) and their status as rare plants needs to be reevaluated. 3.…”

Section: Precise Diagnosis Of Endemism Of Crcmentioning

confidence: 99%

Edaphic Endemism in the Amazon: Vascular Plants of the canga of Carajás, Brazil

et al. 2019

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Amazonia is one of the most diverse biomes worldwide, and, as well as luxuriant forest, it includes mountain areas which, despite their small surface area, display fascinating endemism. In these regions, the specificity of edaphic factors is mirrored by a highly specialised, isolated flora adapted to survive adverse conditions. The Serra dos Carajás in the Brazilian state of Pará is one of world's largest iron ore reserves. Known locally as canga, this ironstone formation occupies an area of 115.9 km 2 , and supports campo rupestre of canga vegetation on outcrops that are mostly in the Floresta Nacional de Carajás (FLONA of Carajás) and Parque Nacional dos Campos Ferruginosos (PNCF). The recent publication of the Flora of the cangas of Carajás lists 856 species of seed plants and 186 species of ferns and lycophytes. This project assessed the canga endemic species growing in the region, and further expeditions guided by SDM were carried out in order to ascertain their distribution outisde the area. Departing from an initial list of 58 putative endemics, the final list comprises 38 species of vascular plants (c. 4% of the local flora). These are distributed in 31 genera and 22 families, including three monotypic genera: Carajasia (Rubiaceae), Monogereion and Parapiqueria (Asteraceae). From these, 24 are classified as Rare Species for Brazil and seven as Highly Restricted Endemic (EEO < 100 km 2). An illustrated account is provided, as well as further SDM to detect other possible areas of distribution based on the studied species. The knowledge generated is aimed at directing appropriate conservation plans for the area.

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