Padrões de distribuição geográfica dos gêneros de Eriocaulaceae

Giulietti, Ana María; Hensold, Nancy

doi:10.1590/s0102-33061990000100010

Cited by 120 publications

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“…The Eriocaulaceae is a pantropical family comprising 1 0 genera and about 1200 species (Giulietti & Hensold, 1990), of which more than 90% belong to the genera Eriocaulon L., Paepalanthus Kunth., and Syngonanthus Ruhland. They form frequent components of the vegetation in montane shallow pools or swamps, especially on sandy ground.…”

Section: Introductionmentioning

confidence: 99%

Morphology and anatomy of the vegetative organs and scapes from Aphorocaulon (Paepalanthus, Eriocaulaceae)

Scatena

Rosa

2001

Braz. arch. biol. technol.

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Section: Introductionmentioning

confidence: 99%

Morphology and anatomy of the vegetative organs and scapes from Aphorocaulon (Paepalanthus, Eriocaulaceae)

Scatena

Rosa

2001

Braz. arch. biol. technol.

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“…No Brasil, esse gênero é representado por cerca de 60 de suas 450 espécies (Giulietti & Hensold 1990. No PEIB está representado por apenas uma espécie.…”

Section: Eriocaulon Lunclassified

“…A primeira é caracterizada por possuir androceu diplostêmone e pétalas com glândulas, enquanto a segunda possui androceu isostêmone e pétalas sem glândulas (Koernicke 1863, Ruhland 1903, Stützel 1998. Apresenta distribuição pantropical e elevado número de endemismos (Ruhland 1903, Giulietti & Hensold 1990, Giulietti et al 2005. No Brasil, são encontradas cerca de 700 espécies distribuídas em nove gêneros: Actinocephalus (30 espécies), Comanthera (37), Eriocaulon (55), Leiothrix (49), Paepalanthus (357), Philodice (2), Rondonanthus (3), Syngonanthus (90) e Tonina (1) .…”

Section: Introductionunclassified

“…No Brasil, são encontradas cerca de 700 espécies distribuídas em nove gêneros: Actinocephalus (30 espécies), Comanthera (37), Eriocaulon (55), Leiothrix (49), Paepalanthus (357), Philodice (2), Rondonanthus (3), Syngonanthus (90) e Tonina (1) . O principal centro de diversidade de Eriocaulaceae localiza-se na Cadeia do Espinhaço, em Minas Gerais e Bahia (Giulietti & Hensold 1990, Stützel 1998. Levantamentos florísticos realizados nestas áreas indicam Eriocaulaceae como uma das famílias com maior riqueza, especialmente nos campos rupestres.…”

Section: Introductionunclassified

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A família Eriocaulaceae no Parque Estadual do Ibitipoca, Minas Gerais, Brasil

2011

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-(Eriocaulaceae in the Ibitipoca State Park, Minas Gerais, Brazil). In Brazil, Eriocaulaceae comprise ca. 600 species and nine genera. Most of the taxonomic and morphological diversity center is concentrated in the campos rupestres from the Espinhaço Range. The Ibitipoca State Park (PEIB) is located within the Mantiqueira complex and is composed of different vegetation types. The present study is the floristic treatment of Eriocaulaceae species occurring in the PEIB. Twenty-two species were found, sixteen of Paepalanthus, two of Comanthera, two of Syngonanthus, one of Leiothrix, and one of Eriocaulon. These species occur in various habitats, but are frequently found in open grass dominated formations. An identification key, line drawings, descriptions, besides comments on morphological variation and geographical distribution are provided. Two new synonyms are proposed: Paepalanthus ibitipocencis Silveira = P. calvus Körn. e Paepalanthus orthoblepharus Silveira = P. henriquei Silveira & Ruhland.

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“…Among there more than 400 species are endemic in Brazil. 5) In previous works we have described some biological activity (cytotoxicity, antimicrobial and antioxidant) from naphthopyrones isolated from the capitula of P. bromelioides. [6][7][8] In this work we describe the isolation, structure determination and the cytotoxic effect in vitro of a new 1,4-naphthoquinone isolated from the capitula of Paepalanthus latipes.…”

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A New Cytotoxic Naphthoquinone from Paepalanthus latipes.

et al. 2005

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Quinones are widely distributed in nature and constitute an important class of naturally occurring compounds. They are found in plants, fungi and bacteria. 1) These compounds are aromatic rings with two ketone substitutions. 2) Large number of quinones has been associated with antitumor, antibacterial, antimalarial and antifungal activities.3) The antitumor activity is exhibited predominantly by three main groups of naturally occurring quinones such as benzoquinone, naphthoquinone and anthraquinone. Mitomycin and streptonigrin possess p-benzoquinone moiety with heterocyclic groups whereas anthracyclines, doxorubicin and daunorubicin consist of anthraquinone moiety. Some naphthaquinone antibiotics such as lapachol and lapinone are also found to be cytotoxic to tumor cells. 4) Plants of the Eriocaulaceae family are widespread in the region of the Serra do Cipó, State Minas Gerais, Brazil. Several plants from this family are known as 'everlasting plants' because they appear to be alive even for years after being haversted. Paepalanthus is the largest genus of this family with approximately 500 species. Among there more than 400 species are endemic in Brazil. 5) In previous works we have described some biological activity (cytotoxicity, antimicrobial and antioxidant) from naphthopyrones isolated from the capitula of P. bromelioides. [6][7][8] In this work we describe the isolation, structure determination and the cytotoxic effect in vitro of a new 1,4-naphthoquinone isolated from the capitula of Paepalanthus latipes. Results and DiscussionCompound 1 was obtained as a red powder. The ES-MS spectrum of 1 (positive mode) exhibited protonated molecular ion [MϩH] ] ϩ were also observed. The IR spectrum showed absorptions for hydroxyl (3300 cm Ϫ1 ) and carbonyl groups (1680, 1620 cm Ϫ1 ) indicating a para-quinone system. 9,10) The complete structure of 1 was elucidated by 1D and 2D NMR experiments at 500 MHz. The 13 C-NMR spectrum showed 16 signals. The 1 H-NMR spectrum displayed singlets of aromatic protons at d 6.60 (1H) and 6.05 (1H). Also evident were signals at d 3.86 and 3.81 typical of aromatic methoxyl groups. Another signal at d 2.28 (3H) corresponds to a methyl group. Assignments of 1 H-and 13 C-NMR data were based on HMBC and HSQC experiments (Table 1). In the HMBC spectrum we observed diagnostic long-range correlations between the proton signal at d 6.60 (H-4) and the carbon resonances at d 167.0 (C-1), 161.4 (C-10), 113.0 (C-10a), 148.0 (C-5) and 20.3 (C-11); the proton at d 6.08 (H-8) and the carbonyl carbon resonances at d 177.9 (C-6) and at d 189.2 (C-9) and the carbon resonances at 160.9 (C-7) and 111.2 (C-9a); the proton at d 3.86 (OCH 3 -7) and the carbon resonance at d 160.9 (C-7); the proton signal at d 3.81 (OCH 3 -5) and the carbon resonance at d 147.9 (C-5); the methyl group at d 2.28 (CH 3 -11) and the carbon signals at d 160.7 (C-3) and d 98.2 (C-4). NOESY experiment displayed correlations between the signal at d 6.60 (H-4) and the signals at d 2.28 (CH 3 -11) and at d 3.81 (OCH 3 -5), and betw...

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Padrões de distribuição geográfica dos gêneros de Eriocaulaceae

Cited by 120 publications

References 13 publications

Morphology and anatomy of the vegetative organs and scapes from Aphorocaulon (Paepalanthus, Eriocaulaceae)

Morphology and anatomy of the vegetative organs and scapes from Aphorocaulon (Paepalanthus, Eriocaulaceae)

A família Eriocaulaceae no Parque Estadual do Ibitipoca, Minas Gerais, Brasil

A New Cytotoxic Naphthoquinone from Paepalanthus latipes.

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