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Registros recuperados: 10
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Araucaria angustifolia chloroplast genome sequence and its relation to other Araucariaceae Genet. Mol. Biol.
Brandão,José Henrique S. G.; Rodrigues,Nureyev F.; Eguiluz,Maria; Guzman,Frank; Margis,Rogerio.
Abstract Araucaria angustifolia is endemic to southern Brazil. Known as Brazilian pine, A. angustifolia is the only native conifer species with economic and social relevance in this country. Due to massive exploitation, it has suffered a significant population decline and currently is classified as critically endangered. This encouraged the scientific community to investigate genetic features in Brazilian pine to increase resources for management and preservation. In this work, RNA-Seq data was used to determine the complete nucleotide sequence of the A. angustifolia chloroplast genome (cpDNA). The cpDNA is 146,203 bp in length and contains 122 genes, including 80 protein-coding genes, 5 ribosomal RNA genes, and 37 tRNA genes. Coding regions comprise...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian pine; Plastid; Genome; CpDNA; Conservation.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572019000400671
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Comparison of seedling growth among three co-occurring varieties of Araucaria angustifolia (Bertol.) Kuntze under greenhouse conditions Acta Botanica
Coutinho,André Luiz; Dillenburg,Lúcia Rebello.
Araucaria angustifolia (Bertol.) Kuntze is a tall, long-lived tree species, which grows as an emergent tree in the araucaria forests of southern Brazil. Four varieties have been described for this species, and three of them were selected for this study: "angustifolia" (the type variety), "caiova" and "indehiscens". These are co-occurring varieties that differ in external seed color and timing of seed maturation. The purpose of this study was to compare the initial growth of plants originated from seeds of these three varieties, in order to test the hypothesis that these varieties also differ in the initial growth of their seedlings. Seeds were collected from a single forest location, and 60 plants per variety were grown in pots for a period of 244 days....
Tipo: Info:eu-repo/semantics/report Palavras-chave: Araucariaceae; Brazilian pine; Monkey pine; Caiova pine; Phenotypic variation.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062010000200025
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Establishment of post-harvest early-developmental categories for viability maintenance of Araucaria angustifolia seeds Acta Botanica
Araldi,Cristhyane Garcia; Coelho,Cileide Maria Medeiros.
Araucaria angustifolia seeds are recalcitrant, and their metabolism remains high during storage. This research aimed to describe the initiation of germination in A. angustifolia seeds during storage in order to standardize the assessment of physiological quality and to promote seed conservation. Seeds were collected from two populations and stored for 270 days in the natural laboratory environment and cold chamber. Seeds were classified according to four early developmental stages: I - mature seeds; II - seeds with elongation along the embryonic axis; III - beginning of root protrusion; IV - advanced germination stage, with seedling shoots. After categorization, physical and physiological quality was assessed. In freshly collected seeds, only category I...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian pine; Longevity; Recalcitrant seeds; Seed conservation; Seed development.
Ano: 2015 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062015000400524
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Leveduras associadas a Spermologus rufus Boheman (Coleoptera: Curculionidae) Anais da SEB
Barreto,Marliton R.; Barreto,Eriana S.; Anjos,Norivaldo.
Larvae and adults of Spermologus rufus Boheman can cause severe damage to seeds of Brazilian pine, Araucaria angustifolia. In this study, yeasts were isolated from seeds of A. angustifolia and from the digestive tract of S. rufus to verify their similarity and determine the existence of feeding sites in order to elaborate an artificial diet for this insect. Pichia spp. were found in seeds and Pichia spp. and P. stipitis Pignal in the digestive tract of S. rufus. The low variability among observed microorganisms suggests a food preference, which can facilitate the elaboration of artificial diets.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Insecta; Coleoptera; Curculionidae; Yeast; Pichia; Artificial diets; Brazilian pine.
Ano: 1998 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0301-80591998000200017
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Monoicy in A. angustifolia (Bert.) O. Kuntze (Araucariaceae): I. Morphological aspects of the reproductive structures Anais da ABC (AABC)
Stefenon,Valdir M.; Caprestano,Clarissa A..
Araucaria angustifolia (Bert.) O. Kuntze is a dioecious conifer species native of Brazil. The rare occurrence of monoiceous specimens have been attributed to pathogenic infections or other injuries in adult trees. Here, the morphological characteristics of male and female cones and pollen grains of a monoiceous A. angustifolia are described. Male and female cones and pollen grains presented normal morphology, lacking any sort of injuries or infection and suggesting the existence of further grounds for the occurrence of monoicy in this conifer species.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Araucaria; Sexual system; Brazilian pine.
Ano: 2009 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652009000400009
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PCR-RFLP analysis of non-coding regions of cpDNA in Araucaria angustifolia (Bert.) O. Kuntze Genet. Mol. Biol.
Schlögl,Paulo Sérgio; Souza,Anete Pereira de; Nodari,Rubens Onofre.
The Araucaria angustifolia (Bert.) O. Kuntze, also named the "paraná pine" (‘pinheiro-do-Paranᒠin Portuguese), is a native conifer species naturally occurring in the Brazilian Tropical Atlantic Forest which in Brazil is mostly limited to the southern Brazilian states of Paraná, Santa Catarina and Rio Grande do Sul. Chloroplast DNA markers (cpDNA) are useful in populational genetic studies because of their low substitution rate and the uniparental transmission. The conservation of cpDNA genes between species has allowed the design of consensus chloroplast primers that have had a great impact on population genetics and phylogenetic studies. In this study we used the polymerase chain reaction technique combined with restriction enzyme fragment length...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Haplotypes; Conifer species; Brazilian pine; Genetic diversity.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1415-47572007000300020
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Reserve metabolism of stored and germinated Araucaria angustifolia seeds Agronomy
Araldi, Cristhyane Garcia; Coelho, Cileide Maria Medeiros.
Germination metabolism of recalcitrant seeds of Araucaria angustifolia is activated in storage, which complicates the seeds conservation and utilization. This study aimed to identify the changes in the reserve metabolites of A. angustifolia seeds throughout storage in order to understand the processes of hydrolysis caused by germination metabolism. Mature seeds were harvested in southern Brazil and stored in an ambient environment and cold chamber conditions. Biochemical analyses were performed for embryos and megagametophytes from seeds stored for 0, 15, 30, 45, and 90 days. Due to seeds being in advanced germination in storage, they were evaluated at 90 days in different early developmental categories: I – seeds with mature embryos, II – seeds with...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian pine; Conifer; Protein profile; Reserve mobilization..
Ano: 2019 URL: http://periodicos.uem.br/ojs/index.php/ActaSciAgron/article/view/42707
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Resprouting ability and intensity after damage in seedlings of the large-seeded species Araucaria angustifolia Braz. J. Plant Physiol.
Alabarce,Fernanda da Silva; Dillenburg,Lucia Rebello.
The role of seed reserves on the ability to resprout and on the responses of resprouting in Araucaria angustifoliawas investigated. Seedlings were separated into three groups: plants which had their shoot damaged, a similar group in which damaged plants had their connection to the supporting seed removed, and a control group. All damaged seedlings resprouted, but those which remained connected to their seeds had a greater mass of resprouted shoots than the ones disconnected from their seeds. A greater accumulation of seed mass in the underground hypocotyl was a very distinct initial response to damage, but, on the long run, damaged plants were able to reestablish a biomass allocation pattern, which was very similar to the control plants. These results...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Brazilian pine; Herbivory; Resource allocation; Seed size; Storage.
Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202012000200006
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Rootstock age growth habit influence top grafting in Araucaria angustifolia. Repositório Alice
GASPAR, R. G. B.; WENDLING, I.; STUEPP, C. A.; ANGELO, A. C..
O presente trabalho objetivou avaliar a viabilidade técnica e a influência da idade do porta-enxerto e do hábito de crescimento na enxertia de copa em Araucaria angustifolia. Foram utilizados porta-enxertos de duas idades (8 e 35 anos), com enxertos originários de dois hábitos de crescimento (ortotrópicos e plagiotrópicos). A enxertia foi realizada por borbulhia de placa, no terço médio e superior da copa das árvores de 8 anos e no terço médio e inferior das árvores de 35 anos, sempre próximo ao ápice em ramos primários. Os experimentos foram instalados em duas épocas, no outono e na primavera de 2015. Os tratamentos consistiram de: Porta enxertos com 8 anos de idade e enxertos ortotrópicos; Porta enxertos com 8 anos de idade e enxertos plagiotrópicos;...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Silvicultura clonal; Hábitos de crescimento; Brazilian pine; Clonal forestry; Growing habits; Araucaria angustifolia; Pinheiro do Paraná; Espécie nativa; Enxerto; Grafting (plants).
Ano: 2017 URL: http://www.alice.cnptia.embrapa.br/alice/handle/doc/1087655
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Sensitivity of brazilian-pine (Araucária angustifolia) embryos to desiccation and temperature PFB - Pesquisa Florestal Brasileira
Medeiros, Antonio Carlos de Souza; Walters, Cristina; Hill, Lisa.
The “recalcitrant” behavior of Araucaria angustifolia (Bert.) O. Kuntze seeds (Brazilian pine) limits the conservation of genetic resources of this important species in ex situ genebanks. As initial steps in developing storage protocols, we studied the interaction of water content and temperature on embryo survival. Embryos were excised from seeds and “flash-dried” to water contents as low as 0.29 g water/g dry mass and then exposed to 0°C, -5°C and -18°C for 4 h. Drying rate was calculated from drying time courses and expressed as (g water / g dry weight) / hour. Other authors have studied the effects of desiccation of whole seed of A. angustifolia on viability. In order to compare moisture content of whole seeds to that of embryonic axes, seeds of A....
Tipo: Info:eu-repo/semantics/article Palavras-chave: Seeds; Germplasm; Brazilian pine; Desiccation; Genetic conservation Sementes; Germoplasma; Secagem; Conservação.
Ano: 2004 URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1603
Registros recuperados: 10
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