Juvenile Explants
Mostrando 1-10 de 10 artigos, teses e dissertações.
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1. VITRO OF Melanoxylon brauna SCHOTT. MORPHOGENESIS: RESPONSIVENESS OF EXPLANTS TO PERMANENT AND TEMPORARY IMMERSION GROWTH REGULATORS
ABSTRACT Melanoxylon brauna is propagated by seeds, however, low yield, pest attack and short viability are problems in seedling production. In vitro cultivation is an alternative for large-scale seedling production, but studies with this species are scarce. The aim of the work was to analyze the in vitro morphogenesis of braúna. Explants after induction of
CERNE. Publicado em: 2020-03
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2. Somatic embryogenesis in Carica papaya as affected by auxins and explants, and morphoanatomical-related aspects
ABSTRACT The aim of this study was to evaluate somatic embryogenesis in juvenile explants of the THB papaya cultivar. Apical shoots and cotyledonary leaves were inoculated in an induction medium composed of different concentrations of 2,4-D (6, 9, 12, 15 and 18 µM) or 4-CPA (19, 22, 25, 28 and 31 µM). The embryogenic calluses were transferred to a maturati
An. Acad. Bras. Ciênc.. Publicado em: 01/02/2018
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3. Regeneração de plantas de laranja Pêra via organogênese in vitro.
O objetivo deste trabalho foi estabelecer um protocolo eficiente de regeneração de plantas in vitro, via organogênese em explante juvenil de laranja 'Pêra' (Citrus sinensis L. Osbeck), para atender futuros trabalhos de transformação genética. Segmentos de epicótilo utilizados como explantes foram introduzidos em meio de cultura MT. A fim de maximizar
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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4. Morfogênese in vitro e transformação genética de citros mediada por Agrobacterium tumefaciens / Morphogenesis in vitro and Agrobacterium tumefaciens- mediated genetic transformation of citrus
Current protocols used for citrus genetic transformation have resulted in a low number of transgenic plants, furthermore, it used juvenile material which source of explants. Plants regenerated from these sources of explants have long juvenile periods for initial fruit production and are necessary many years for evaluation of the introduced characteristics of
Publicado em: 2008
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5. Propagação vegetativa e cultivo in vitro de Bixa orellana L. e Ginkgo biloba L. / Vegetative propagation and in vitro culture of Bixa orellana L. and Ginkgo biloba L.
Bixa Orellana L. and Ginkgo biloba L. are woody species that synthesize exclusive medicinal components of economic importance. The objectives of this study were: (1) to evaluate and select genotypes of B. orellana with high bixin content; (2) to rescue vegetative genotypes of B. orellana aiming the production of explants for the in vitro culture; (3) to esta
Publicado em: 2007
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6. MULTIPLICAÇÃO IN VITRO DE MAMOEIRO TAINUNG 01
Experiments were accomplished in establishment and multiplication medium with the objective of evaluating the micropropagation of the papaya tree (Carica papaya L.) Hybrid Tainung 01 , generation F1, being used apical sections and apical sections of lateral buds of juvenile plants, cultivated in greenhouse. In the MS establishment medium, being used apical s
Publicado em: 2006
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7. Enhancement of RNA Synthesis, Protein Synthesis, and Abscission by Ethylene
Ethylene stimulated RNA and protein synthesis in bean (Phaseolus vulgaris L. var. Red Kidney) abscission zone explants prior to abscission. The effect of ethylene on RNA synthesis and abscission was blocked by actinomycin D. Carbon dioxide, which inhibits the effect of ethylene on abscission, also inhibited the influence of ethylene on protein synthesis. An
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8. Inhibition of Abscission by Calcium 1
An inhibition of abscission in bean petiole explants is reported for additions of calcium salts, especially at concentrations between 10−3 and 10−1m. Magnesium is less effective, and other commmon macronutrients are ineffective in inhibiting abscission. Evidence from timing experiments indicates that the calcium inhibition may act on the stage I or the �
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9. Activators of the nuclear hormone receptors PPARalpha and FXR accelerate the development of the fetal epidermal permeability barrier.
Members of the superfamily of nuclear hormone receptors which are obligate heterodimeric partners of the retinoid X receptor may be important in epidermal development. Here, we examined the effects of activators of the receptors for vitamin D3 and retinoids, and of the peroxisome proliferator activated receptors (PPARs) and the farnesoid X-activated receptor
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10. Diabetes mellitus and genetic prediabetes. Decreased replicative capacity of cultured skin fibroblasts.
The idea that the gene(s) that cause diabetes mellitus can be expressed in extrapancreatic cells has been examined by tissue culture techniques. Skin biopsies were obtained from 25 normal subjects (N), 26 overt diabetics (D), 16 of juvenile onset (JOD) and 9 of maturity onset (MOD), and 21 subjects genetically predisposed to diabetes (P) on the basis of matu