Sinopse taxonômica de Cactaceae epifíticas no Rio Grande do Sul, Brasil

Bauer, Danielle; Waechter, Jorge Luiz

doi:10.1590/s0102-33062006000100021

Cited by 17 publications

(24 citation statements)

References 11 publications

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“…A espécie ocorre do Panamá ao Paraguai (Kimnach 1964). No RS, apresenta-se como epífito característico, com ocorrência nos biomas Mata Atlântica e Pampa, na Floresta Estacional Decidual e formações pioneiras (matas ciliares) do Alto e Médio rio Uruguai (Bauer & Waechter 2006 Hatiora rosea (Lagerh.) Barthlott (Figs.…”

Section: Epiphyllum Phyllanthus (L) Haw (Figs 1-3)unclassified

“…Observações ecológicas: plantas epifíticas, semi-eretas ou pendentes de pequeno porte. A espécie ocorre nos estados do Paraná, Santa Catarina e na região nordeste do RS (Barthlott & Taylor 1995), onde é encontrada nas florestas Ombrófila Densa e Ombrófila Mista (Bauer & Waechter 2006 Descrição polínica: grãos de pólen de tamanho médio a grande; subprolatos; 6-colpados, colpos com membrana apertural granulada; exina tectada-perfurada coberta por…”

Section: Epiphyllum Phyllanthus (L) Haw (Figs 1-3)unclassified

“…As contribuições pioneiras de Rambo (1951Rambo ( , 1954aRambo ( , 1954bRambo ( , 1956aRambo ( , 1956bRambo ( , 1961 sobre as fl orestas no Rio Grande do Sul, Brack et al (1985) e Rogalski & Zanin (2003), sobre a mata pluvial do Alto Uruguai, Waechter (1986Waechter ( , 1998, Gonçalves & Waechter (2003) sobre epífi tos vasculares na Planície Costeira, e Giongo & Waechter (2004) sobre epífi tos na Depressão Central compõem estes levantamentos, conforme sintetizado por Bauer & Waechter (2006) e Carneiro et al (2016).…”

Section: Introductionunclassified

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Morfologia polínica de espécies epífitas de Cactaceae Juss. do Rio Grande do Sul, Brasil

2017

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RESUMO -Neste trabalho é apresentado o estudo sobre a morfologia polínica de 11 espécies da família Cactaceae, com hábito epífi to, ocorrentes no Rio Grande do Sul, extremo sul do Brasil, com descrições, medidas, fotomicrografi as, bem como informações ecológicas e biogeográfi cas. Os grãos de pólen possuem tamanhos variáveis (médios, grandes e gigantes), com formas prolato-esferoidais a prolatos; aberturas 3-colpados (Lepismium cruciforme (Vell.) Miq. e Rhipsalis cereuscula Haw.) e 6-colpados (demais espécies); exina tectada, com diminutos grânulos e perfurações; colpos cobertos por fi na membrana granulada em todas as espécies, exceto Epiphyllum phyllanthus (L.) Haw.; ocorre heteromorfi smo nas aberturas de L. houlletianum (Lem.) Barthlott, L. warmingianum (K. Schum.) Barthlott e Rhipsalis campos-portoana Loefgr. Os resultados palinológicos indicam dois padrões morfológicos nos táxons estudados: o primeiro (I) é relacionado aos grãos de pólen com abertura 3-colpadas e o segundo (II) aos de abertura 6-colpados. Palavras-chave: palinologia, tipos polínicos, palinotaxonomiaABSTRACT -Pollen morphology of epiphytic species of the Cactaceae Juss. from Rio Grande do Sul, Brazil. In this paper, we studied the pollen morphology of 11 species of epiphytic Cactaceae family in Rio Grande do Sul, southern Brazil. We provide descriptions, measurements, photomicrographs, as well as information on ecology and biogeography. The pollen grains are variable in size (medium, large and giant) with prolate-spheroidal to prolate forms; 3-colpate aperture (Lepismium cruciforme (Vell.) Miq. and Rhipsalis cereuscula Haw.) and 6-colpate (remaining species); exine with tectum and small granulate texture and perforations; except for Epiphyllum phyllanthus (L.) Haw, colpi are covered by thin granulate membrane; heteromorphism in the apertures of L. houlletianum (Lem.) Barthlott, L. warmingianum (K. Schum.) Barthlott and Rhipsalis campos-portoana Loefgr was observed. Results indicate two morphological patterns in the study taxa: the fi rst (I) is related to pollen grains with 3-colpate aperture and second (II) with 6-colpate aperture.

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Section: Epiphyllum Phyllanthus (L) Haw (Figs 1-3)unclassified

Section: Introductionunclassified

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Morfologia polínica de espécies epífitas de Cactaceae Juss. do Rio Grande do Sul, Brasil

2017

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“…Cactaceae family comprises 124 genera and 1,438 species (Hunt et al, 2006) primarily presenting neotropical distribution (Taylor, 1997). The group has countless adaptations to the arid conditions, however, approximately 15% of its representatives, about 220 species, are adapted to the epiphytic behavior in humid tropical and subtropical forests (Bauer, 2006), standing out among the 20 families with the greatest number of epiphytes (Kersten, 2010).…”

Section: Introductionmentioning

confidence: 99%

Urea concentration on vegetative development and nutrition of Cactaceae epiphytic species

et al. 2016

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Rhipsalis paradoxa, Rhipsalis baccifera and Hatiora salicornioides are epiphytic cacti from the Atlantic Forest. They have a great ornamental potential due to the exotic characteristic of their joints (stems segments). The study aimed to evaluate the growth and development of roots and shoots as well as macronutrient and micronutrient contents in the joints of these species fertilized with different concentrations of urea as a nitrogen source. The study also analyzed the importance of the root system on nitrogen absorption. Plants were weekly irrigated with modified Hoagland & Arnon solutions with 0, 16.7, 33.3, 49.9 or 66.6 mM N applied as urea. After 180 days of cultivation, plants were separated into joints and roots for biometric and biomass measures, as well as macronutrient and micronutrient analysis of joints. The experimental design was randomized blocks, with five treatments, four blocks and five plants per plot, for each species. Data were submitted to analyses of variance and regression. R. baccifera showed the highest plant length and number of joints in 29.94 and 40.82 mM N, respectively, H. salicornioides showed the highest length and number of joints in 48.29 and 45.68 mM N respectively. For R. paradoxa, the highest length was in 66.6 mM N. The lowest values for plant length and number of joints were observed in the absence of N, for all species. High nitrogen concentrations in the solution increased the N concentration in joints of R. baccifera, R. paradoxa and H. salicornioides by 24, 19 and 13 g N/kg dry mass, respectively. The roots of epiphytic cacti, besides the function of fixing the plant on substrate (phorophyte), are functional for nutrient absorption, and the best results were obtained in 30.05 to 66.60 mM N in the nutrient solution.

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“…E. phyllanthus belongs to Hylocereeae together with Pseudorhipsalis, Disocactus, Selenicereus, Hylocereus e Weberocereus, including epiphytic and rupicule plants with the most of the species occurring in Central America. Cactaceae species have Neotropical distribution and they are found mostly in arid or semiarid environments and 220 species with epiphytic life-form in the tropical and sub-tropical rain forest, mainly the subfamily Cactoideae, and tribes Hylocereeae and Rhipsalideae (Bauer & Waechter 2006).…”

Section: Introductionmentioning

confidence: 99%

The germination of seeds of Epiphyllum phyllanthus (L.) Haw. (Cactaceae) is controlled by phytochrome and by nonphytochrome related process

2010

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Resumo: As sementes de Epiphyllum phyllanthus apresentam alta sensibilidade à luz e a sua germinação pode ser promovida pela luz verde de segurança por meio da resposta de fluência muito baixa mediada pelo fitocromo A. Parte da população de sementes tem fitocromo B na forma ativa (Fve) suficiente para promover a germinação no escuro. Sementes de Epiphyllum phyllanthus germinam em uma ampla faixa de temperatura de 10 a 40 °C, atingindo germinação completa na faixa de 15 a 30 °C. Acima de 35 °C a velocidade de germinação aumenta indicando o controle por um processo não relacionado com o fitocromo. A análise da cinética da germinação de sementes indicou que o controle pelo fitocromo A é menos dependente da temperatura do que o processo controlado pelo fitocromo B. Palavras-chave: germinação de sementes, resposta de fluência muito baixa, resposta de fluência baixa. Simão, E. et al.

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Sinopse taxonômica de Cactaceae epifíticas no Rio Grande do Sul, Brasil

Cited by 17 publications

References 11 publications

Morfologia polínica de espécies epífitas de Cactaceae Juss. do Rio Grande do Sul, Brasil

Morfologia polínica de espécies epífitas de Cactaceae Juss. do Rio Grande do Sul, Brasil

Urea concentration on vegetative development and nutrition of Cactaceae epiphytic species

The germination of seeds of Epiphyllum phyllanthus (L.) Haw. (Cactaceae) is controlled by phytochrome and by nonphytochrome related process

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