Baccharis subgen. Molina (Asteraceae) no estado do Rio de Janeiro, Brasil

Heiden, Gustavo; Baumgratz, José Fernando A.; Esteves, Roberto Lourenço

doi:10.1590/s2175-78602012000300013

Cited by 13 publications

(9 citation statements)

References 5 publications

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“…While floristic inventories are available (Nesom 1990;Giuliano 2001;Müller 2006;Heiden 2009;Giuliano and Freire 2011;Heiden et al 2012), there was no infrageneric classification of the Brazilian species, with the exception of Heiden (2009), which is restricted to the 55 species of Rio de Janeiro State and recognized four subgenera and 15 sections. However, Heiden andPirani (2016a, 2016b) recently presented novel features for the infrageneric classification, based on a broad phylogenetic study encompassing seven subgenera and 45 sections, which still needs to be tested from a morpho-anatomical point of view to identify new potential synapomorphies of the main clades.…”

Section: Introductionmentioning

confidence: 99%

Comparative leaf anatomy of Baccharis (Asteraceae) from high-altitude grasslands in Brazil: taxonomic and ecological implications

Ornellas

Heiden

Luna

et al. 2019

Botany

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Baccharis L. is an important genus in the high-altitude environments of South America. In the State of Rio de Janeiro, southeastern Brazil, the greatest richness is found at montane and high-montane ecological refuges, known as high-altitude grasslands. The high altitude provides several environmental factors that turn the high-altitude grasslands into singular tropical habitats. In this article we describe the leaf anatomy of six shrubby species of Baccharis, pointing out ecological aspects of the structures, and testing the use of statistical analyses to compare the species. Using light and scanning electron microscopy, we compared the anatomical features of the leaves and performed a cluster and principal component analyses. The results show novel features in the leaf anatomy for the genus, such as an undulated cuticle, three secretory ducts in the midrib, secretory ducts associated with the xylem, and biseriate glandular trichomes with an irregular organization of the cells. Our statistical analyses indicate that the anatomical features of the leaves, especially trichomes, are useful for distinguishing the different species, whereas others, such as isobilateral mesophyll, amphistomatic leaves, and an epidermis with thick cell walls correlate with their high-elevation habitat.

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Section: Introductionmentioning

confidence: 99%

Comparative leaf anatomy of Baccharis (Asteraceae) from high-altitude grasslands in Brazil: taxonomic and ecological implications

Ornellas

Heiden

Luna

et al. 2019

Botany

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“…Male and female specimens of carquejas were collected in the cities of Ponta Grossa (25°08′ 30” S and 49° 58′ 51” W), Paraná state, Brazil (male: PRM and female: PRF), Paulínia (22° 45′ 40” S and 47° 09′ 15” W), and São Paulo state, Brazil (male: SPM and female: SPF). The samples were identified as B. trimera and B. myriocephala , according to Heiden et al [ 23 ]. Voucher specimens were deposited in the Herbarium from Embrapa Clima Temperado (ECT), Pelotas, Rio Grande do Sul state, Brazil, under the numbers ECT0005576 and ECT0005575, respectively.…”

Section: Methodsmentioning

confidence: 99%

Effects of Gender and Geographical Origin on the Chemical Composition and Antiradical Activity of Baccharis myriocephala and Baccharis trimera

Struiving

Hacke

Simionatto

et al. 2020

Foods

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This study aimed to characterize and compare essential oils and ethyl acetate fractions obtained in basic and acidic conditions from both male and female Baccharis species (Baccharis myriocephala and Baccharis trimera) from two different Brazilian regions. Samples were characterized according to their chemical compositions and antiradical activity by 2,2-diphenyl-1-picrylhydrazyl (DPPH) and 2,2′-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) assays. Principal component analysis (PCA) provided a clear separation regarding the chemical composition of essential oils from the samples obtained from different regions by using gas chromatography–mass spectrometry with flame-ionization detection (GC-MS-FID). PCA also revealed that gender and region of plant collections did not influence the chemical composition and antiradical activity of ethyl acetate fractions, which was corroborated with hierarchical cluster analysis (HCA) data. High performance liquid chromatography with diode-array detector (HPLC-DAD) identified significant quantities of flavonoids and phenolic acids in the fractions obtained in basic and acidic fractions, respectively. The obtained results clearly demonstrated that the geographical region of plant collection influenced the chemical composition of essential oils from the studied Baccharis species. Moreover, the obtained fractions were constituted by several antiradical compounds, which reinforced the usage of these species in folk medicine.

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“…(Flora do Brasil 2020). Popularly known as "holy grass" in Brazilian flora (Barroso & Bueno 2002) it is recognized for its petiolate, lanceolate, elliptical to ovate leaves, with serrated margins and obtuse base, furrowed stems and heterogamous arrangement (Heiden et al 2012). The species B. vulneraria has a wide distribution in South America and is frequently found in southern Brazil, a country that has more than one hundred Baccharis species described, with B. coridifolia and B. megapotamica being the species commonly reported as toxic agents (Heiden 2009, Tokarnia et al 2012.…”

Section: Introductionmentioning

confidence: 99%

Spontaneous poisoning by Baccharis vulneraria Backer in cattle

et al. 2022

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Baccharis vulneraria Backer is a sub-shrub frequently found in southern Brazil, which leads to gastrointestinal tract intoxication. The objective of this study is to describe epidemiological, clinical and anatomopathological aspects of two cases of B. vulneraria poisoning in cattle. Two bovines from two different municipalities in the Itajaí Valley, Santa Catarina, Brazil were necropsied and performed the histopathological evaluation and botanical classification of the plant found in the pasture. Bovine 1 had dehydration, ruminal atony, diarrhea, congested mucous membranes and hypothermia for 20 hours, and died during clinical care. At necropsy, there was moderate multifocal detachment and reddening of the forestomachs mucosa. Bovine 2 presented anorexia, dry feces, ruminal atony, vocalization and muscle tremors for ten days, unresponsive to treatments, evolving to death. At necropsy were seen loosening of the mucosa with marked diffuse reddening and transmural edema. The microscopic exam revealed degeneration, necrosis, vesiculation, and detachment of the forestomachs’ mucosa, associated with moderate multifocal neutrophilic infiltrate (Bovine 1); marked diffuse transmural necrosis, edema, hemorrhage, and marked fibrinous exudation (Bovine 2). A large amount of B. vulneraria was found in the pastures, with signs of consumption. In this report, a case of subacute evolution of B. vulneraria poisoning was observed, since the poisoning by this plant is usually acute. More knowledge about poisoning by this plant is necessary for the prevention and control, avoiding new mortality cases.

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Baccharis subgen. Molina (Asteraceae) no estado do Rio de Janeiro, Brasil

Cited by 13 publications

References 5 publications

Comparative leaf anatomy of Baccharis (Asteraceae) from high-altitude grasslands in Brazil: taxonomic and ecological implications

Comparative leaf anatomy of Baccharis (Asteraceae) from high-altitude grasslands in Brazil: taxonomic and ecological implications

Effects of Gender and Geographical Origin on the Chemical Composition and Antiradical Activity of Baccharis myriocephala and Baccharis trimera

Spontaneous poisoning by Baccharis vulneraria Backer in cattle

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