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| Registros recuperados: 12 | |
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| Pescador,Rosete; Kerbauy,Gilberto Barbante; Viviani,Daniela; Kraus,Jane Elizabeth. |
| Somatic embryogenesis represents a valuable tool for the studies on the basic aspects of plant embryo development. Today this process is used as a potencial technique for large-scale plant micropropagation although, so far, it has been applied to only a small number of species. However, when somatic embryos are malformed they are considered economically useless. In Acca sellowiana (O. Berg) Burret, an important fruit-producing crop, large amounts of anomalous somatic embryos (76.3%) were found just after 40 days of culture of explants in a 2,4-D containing medium. Among the anomalous forms found in the cotiledonary stage, 12.2% consisted of fused embryos, 40.4% displayed fused cotyledons, 13.0% presented supernumerary cotyledons, and 10.7% showed absence... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: 2; 4-D feijoa morphohistological analysis somaclonal variation somatic embryogenesis. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042008000100014 |
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| Sgrott,Andressa Franzoi; Booz,Maristela R.; Pescador,Rosete; Heck,Teresinha Catarina; Stürmer,Sidney Luiz. |
| Inoculation with arbuscular mycorrhizal fungi (AMF) of tree seedlings in the nursery is a biotechnological strategy to improve growth, survival after transplanting, biomass production and to reduce the use of fertilizers. Archontophoenix alexandrae and Euterpe edulis are palm species used in southern Brazil to produce the palm heart, the latter being included in the list of threatened species due to the overexploitation of its native population. The purpose of this paper was to evaluate the effect of mycorrhizal inoculation on growth and physiological parameters of A. alexandrae and E. edulis. After germination, the seedlings were inoculated (AMF) or not (CTL) with AMF in the treatments. Values of chlorophyll content, biomass and shoot phosphorus were not... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Palm species; Soluble carbohydrates; Plant carbon; Field inoculation; Allometric equations. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832012000400005 |
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| Santos,Rosilda dos; Girardi,Carla Giovana; Pescador,Rosete; Stürmer,Sidney Luiz. |
| The rhizomes of Zingiber officinale Roscoe (ginger) are widely used for their medicinal and flavoring properties, whereas the influence of root symbionts on their growth is poorly understood. In this study, the effects of phosphate fertilization and inoculation with a mixture of arbuscular mycorrhizal fungi (AMF) (isolates Glomus clarum RGS101A, Entrophospora colombiana SCT115A and Acaulospora koskei SPL102A) on survival, growth and development of micropropagated ginger were investigated. After transplanting to post vitro conditions, the ginger microplants were subjected to the following treatments: a) AMF mixture, b) P addition (25 mg kg-1), c) AMF + P, and d) non-mycorrhizal control without P addition. After eight months of growth, survival ranged from... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Acclimatization; Root colonization; Fungal communities. |
| Ano: 2010 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832010000300018 |
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| Guerra,Miguel Pedro; Dal Vesco,Lírio Luiz; Pescador,Rosete; Schuelter,Adilson Ricken; Nodari,Rubens Onofre. |
| No Laboratório de Fisiologia do Desenvolvimento e Genética Vegetal do CCA-UFSC, nos anos de 1993 a 1996, foram testadas 24 combinações de tratamentos envolvendo dois genótipos de abacaxizeiro (Ananas comosus (L.) Merr.), seis combinações dos fitorreguladores ácido naftalenoacético (ANA) e 6-benzilaminopurina (BAP), e os meios de cultura líquidos e geleificados, com o objetivo de estabelecer um protocolo regenerativo para a micropropagação do abacaxizeiro. A taxa de regeneração comportou-se de forma quadrática para a maioria das combinações testadas. O meio de cultura MS (Murashige & Skoog, 1962), líquido, adicionado de ANA (2,7 µM) e BAP (4,4 µM), proporcionou uma taxa média de regeneração de 19,7 brotos/explante. A magnitude do efeito genotípico... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Cultura de tecidos; Taxa de regeneração; Ananas comosus; Propagação clonal. |
| Ano: 1999 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X1999000900005 |
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| Esemann-Quadros,Karin; Mota,Ana Paula; Kerbauy,Gilberto Barbante; Guerra,Miguel Pedro; Ducroquet,Jean Pierre Henri Joseph; Pescador,Rosete. |
| A Acca sellowiana Berg. (Myrtaceae) é uma frutífera nativa dos planaltos meridionais do Sul do Brasil e que se encontra em processo de domesticação. Seus frutos são doce-acidulados e podem ser consumidos in natura ou empregados para a produção de sucos e doces. Assim, informações sobre o desenvolvimento, morfologia e anatomia de seus frutos são de grande interesse e foram objetos do presente trabalho. O fruto (ovário mais hipanto), no tempo zero (plena floração), tem, em média, 0,6 cm de altura e 0,4 cm de diâmetro, sendo cerca de dez vezes menor que o fruto maduro. Longitudinalmente, identificam-se três regiões distintas: locular, sublocular e prolongamento. Transversalmente, na região mediana, estão delimitadas três regiões: 1) epiderme (casca): com... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Goiaba serrana; Anatomia do fruto; Crescimento do fruto. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452008000200005 |
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| Rosa,Aline Mabel; Pescador,Rosete; Silva,Aparecido lima da; Brighenti,Alberto Fontanella; Brunetto,Gustavo. |
| O trabalho objetivou avaliar a fertilidade e as reservas de C e N em gemas de ramos, na entrada da dormência e dormência plena, das variedades 'Cabernet Sauvignon' e 'Nebbiolo'. Em um vinhedo de 'Cabernet Sauvignon' e outro de 'Nebbiolo', em São Joaquim (SC), foram coletadas gemas em ramos de ano, em duas épocas: na entrada da dormência (maio de 2012) e na dormência plena (agosto de 2012). Os tratamentos foram: (T1) gemas basais (1ª a 5ª); (T2) gemas medianas (6ª a 10ª), e (T3) gemas distais (11ª a 15ª). Em cada planta, foram coletados três ramos, um localizado no lado esquerdo, outro no lado direito e o terceiro no centro da planta. A presença ou ausência de primórdios de inflorescência foi realizada apenas nas gemas dos ramos coletados na dormência... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Carbono; Nitrogênio; Carboidratos; Vitis vinifera L. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452014000300009 |
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| Zappelini,Julia; Souza,Luiz Gustavo; Guerra,Miguel Pedro; Pescador,Rosete. |
| ABSTRACT Although karyotype features are useful data for evolutionary studies, cytogenetic data in Bambusoideae are mainly based only on chromosome counts. The first comparative cytogenetic analysis of three Neotropical woody bamboo species - Guadua chacoensis, G. angustifolia and Chusquea tenella - was undertaken based on new and reviewed chromosome counts, CMA/DAPI double staining, fluorescent in situ hybridization (FISH) with 35S and 5S rDNA probes, and genome size estimation. The two species of Guadua were found to have 2n = 46 chromosomes, while the first record for C. tenella was 2n = 44. Only one pair of CMA+/DAPI- was detected on the terminal region of metacentric chromosomes in all three species. Likewise, one pair of 5S and 35S rDNA sites was... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Chusquea; Cytogenetics; Diploidization; Evolution; Guadua; Polyploidy. |
| Ano: 2020 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062020000400673 |
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| Souza,Priscila F de; Borghezan,Marcelo; Zappelini,Julia; Carvalho,Lara R de; Ree,Joseph; Barcelos-Oliveira,Jorge L; Pescador,Rosete. |
| ABSTRACT Conventional soil and hydroponic growing systems have inherent differences in water and nutritional availability. These differences may affect plant physiological development and biochemistry. The objective of this study was to evaluate lettuce (Lactica sativa) cv. ‘Crocantela’development in either a hydroponic system or in soil through analyses of vegetative growth; chlorophyll abundance; and sugar and starch content. We evaluated the dry mass (DM), fresh mass (FM), number of leaves (LN), stomatal density and contents of chlorophyll, carotenoids, sugars and starch. Due to the improved nutritional conditions, especially in relation to macronutrients, plants grown in hydroponic system presented significant differences in chlorophyll a (0.4481... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Lactuca sativa; Biomass; Chlorophyll; Starch; Stomatal density. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-05362019000100101 |
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| Pescador,Rosete; Kerbauy,Gilberto Barbante; Strassburg,Rosali Constantino; Kraus,Jane Elizabeth. |
| Acca sellowiana has anatropous, bitegmic and crassinucellate ovules. The outer and inner integuments are double-layered except in the micropyle, where they are composed of more layers; the micropyle is zig-zag shaped. The egg apparatus lies at the micropylar pole, and the zynergids present a conspicuous filiform apparatus. The antipodal cells are present in the chalazal region, persisting before the occurrence of double fertilization. The zygote is visible 21 days after pollination; nuclear endosperm is already present. The first mitotic division of the zygote occurs at 24th day. The globular, cordiform and torpedo embryo stages can be seen at 30, 45 and 60 days after pollination, respectively. The mature embryo characterized by the presence of a... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Feijoa; Megagametophyte; Ovule; Pineapple guava; Zygotic embryo. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-33062009000100017 |
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| Silva,Maicon F. da; Pescador,Rosete; Rebelo,Ricardo A.; Stürmer,Sidney L.. |
| We have investigated the effects of phosphate fertilization and inoculation with isolates of arbuscular mycorrhizal fungi Scutellospora heterogama SCT120E, Gigaspora decipiens SCT304A, Acaulospora koskei SCT400A, Entrophospora colombiana SCT115, and an assemblage (Mix) of all four isolates on growth, development and oleoresin production of micropropagated Zingiber officinale. After 120 and 210 d of growth, the Mix and phosphorus addition significantly increased shoot height relative to control plants. Phosphorus addition was the only treatment resulting in significantly large shoot dry biomass relative to control after 120 d. No statistical differences were observed between treatments for shoot dry biomass after 210 d and for fine and coarse root biomass... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Fungal assemblage; Ginger; Oleoresin; Secondary metabolites. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202008000200004 |
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| Booz,Maristela Raitz; Kerbauy,Gilberto B.; Guerra,Miguel Pedro; Pescador,Rosete. |
| The γ-aminobutyric acid (Gaba) is a non-protein amino acid found in prokaryotes and eukaryotes. Its role in plant development has not been fully established. This study reports a quantification of the levels of endogenous Gaba, as well as investigation of its role in different stages of somatic embryogenesis in Acca sellowiana Berg. (Myrtaceae). Zygotic embryos were used as explants and they were inoculated into the culture medium contained different concentrations of Gaba (0,2, 4, 6, 8 and 10 µM). The highest concentrations of endogenous Gaba were detected between the third and nine days after inoculation, reaching the value of 12.77 µmol.g-1FW. High frequency of somatic embryogenesis was observed in response to 10 µM Gaba. This treatment also resulted in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Amino acid; Pineapple guava; Plant growth. |
| Ano: 2009 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1677-04202009000400003 |
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| Registros recuperados: 12 | |
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