Plant Photoperiodism
Mostrando 1-8 de 8 artigos, teses e dissertações.
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1. Autoecologia de Bauhinia holophylla Steud. (Leguminosae-Caesalpiniolideae), na Reserva Biologica e Estação Experimental de Moji Guaçu, SP
A population of Bauhinia holophylla located at a cerrado area in the Reserva Biológica e Estação Experimental de Moji Guaçu was studied in relation to reproductive phenology, leaf life span, seed predation, seed germination and aspects of plant regeneration. The distribution pattern of the juvenile and adult population is considered agregated. This popul
Publicado em: 2006
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2. Use of photomorphogenenic mutants in the study of the competence for in vitro regeneration in micro-tomato (lycopersicon esculentum cv micro-tom). / Uso de mutantes fotomorfogenéticos no estudo da competência para regeneração in vitro em micro-tomateiro (Lycopersicon esculentum CV Micro-Tom.
Paralelamente ao modelo Arabidopsis thaliana, o tomateiro (Lycopersicon esculentum) tem sido crescentemente utilizados em abordagens genéticas de questões fisiológicas. Uma das principais vantagens de Arabidopsis como planta de laboratório tem sido seu pequeno porte e ciclo de vida curto. Contudo, a cultivar Micro-Tom (MT) de tomateiro possui tamanho
Publicado em: 2004
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3. Abstracts of the Papers for the Annual Meeting of The American Society of Plant Physiologists held at the Asilomar Conference Grounds, Pacific Grove, California, August 22-26, 1971: Phytochrome II; photomorphogenesis; photoperiodism
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4. Carbon Dioxide Output as an Index of Circadian Timing in Lemna Photoperiodism 1
Previous work on flowering suggested that photoperiodism in Lemna perpusilla 6746 involves an endogenous circadian “clock,” but direct evidence requires study of an overt rhythm in the same plant. The CO2 output rate of axenic cultures supplied with sucrose has been studied in a system using infrared analysis and monitoring four sets of cultures at once.
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5. Epistasis and the Genetic Divergence of Photoperiodism between Populations of the Pitcher-Plant Mosquito, Wyeomyia Smithii
Parallel crosses between each of two southern (ancestral) and one northern (derived) population of the pitcher-plant mosquito, Wyeomyia smithii, were made to determine the genetic components of population divergence in critical photoperiod, a phenological trait that measures adaptation to seasonality along a climatic gradient. Joint scaling tests were used t
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6. Genetic Regulation of Development in Sorghum bicolor1: III. Asynchrony of Thermoperiods with Photoperiods Promotes Floral Initiation
Asynchronous thermo- and photoperiods were observed to hasten floral differentiation (initiation) in the short day plant Sorghum bicolor (L.) Moench. Shifting the 12 hour thermoperiod forward 0.5 or 2.5 hours hastened floral initiation compared to controls with synchronous thermo-and photoperiods. Delaying the day-night temperature change until 2.5 hours aft
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7. Evolutionary Divergence of the Genetic Architecture Underlying Photoperiodism in the Pitcher-Plant Mosquito, Wyeomyia Smithii
We determine the contribution of composite additive, dominance, and epistatic effects to the genetic divergence of photoperiodic response along latitudinal, altitudinal, and longitudinal gradients in the pitcher-plant mosquito, Wyeomyia smithii. Joint scaling tests of crosses between populations showed wide-spread epistasis as well as additive and dominance
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8. Twilight Effect: Initiating Dark Measurement in Photoperiodism of Xanthium1
Six experiments studied the effects of low levels of red and far-red light upon the initiation of measurement of the dark period in the photoperiodic induction of flowering in Xanthium strumarium L. (cocklebur), a short-day plant, and compared effects with those of comparable light treatments applied for 2 hours during the middle of a 16-hour inductive dark