Phytochrome
Mostrando 1-12 de 671 artigos, teses e dissertações.
-
1. Revisão taxonômica e filogenia de Orthophytum Beer (Bromeliaceae, Bromelioideae) / Taxonomic revision and phylogeny of Orthophytum Beer (Bromeliaceae, Bromelioideae)
The genus Orthophytum Beer (Bromeliaceae) comprises 46 species geographically distributed in eastern Brazil extending from the state of Ceará in the North, to Minas Gerais and Espírito Santo in the South. The growth form of these plants is typically lithophytic, only rarely terrestrial, and granitic or quartzitic rocky outcrops constitute their favorite su
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 03/09/2012
-
2. Analysis of the interactions between phytochrome and plant hormones in plant development / Estudo da interação entre fitocromo e hormônios vegetais no controle do desenvolvimento
Muitas respostas moduladas pela luz durante o desenvolvimento das plantas também são reguladas por hormônios vegetais, levando à hipótese da interação entre ambos os fatores. Uma ferramenta valiosa para testar tal interação seria o uso de mutantes fotomorfogenéticos e hormonais, bem como duplos mutantes combinando ambos. Em tomateiro, embora sejam
Publicado em: 2008
-
3. Phyisiological, anatomical and ultra-structural characteristics of micro-tomato phytochrome-mutants / CaracterÃsticas fisiolÃgicas, anatÃmicas e ultra estruturais de micro-tomateiros fitocromo-mutantes.
O uso de microtomateiros fitocromo-mutantes à uma estratÃgia para o estudo do papel dos fitocromos sobre o desenvolvimento das plantas. O objetivo deste trabalho foi caracterizar aspectos fisiolÃgicos, anatÃmicos e ultra-estruturais em microtomateiros (Lycopersicon esculentum cv. Micro-Tom) fitocromo-mutantes. A cultivar Micro-Tom (MT) e os mutantes aure
Publicado em: 2007
-
4. Identification of photoperception and light signal transduction pathways in citrus
Studies employing model species have elucidated several aspects of photoperception and light signal transduction that control plant development. However, the information available for economically important crops is scarce. Citrus genome databases of expressed sequence tags (EST) were investigated in order to identify genes coding for functionally characteri
Genetics and Molecular Biology. Publicado em: 2007
-
5. Phytochrome and temperature control of seed germination in Muntingia calabura L. (Elaeocarpaceae)
As sementes de Muntingia calabura L. germinam nas temperaturas de 15 a 35C sendo a temperatura ótima de 35C onde maior número de sementes germinam em menor período. A curva de fluência-resposta demonstra que o fitocromo controla a germinação de sementes através da resposta de fluência baixa. A resposta da semente ao fotoperíodo e à completa inibiç
Brazilian Archives of Biology and Technology. Publicado em: 2001-09
-
6. Phytochrome controls achene germination in Bidens pilosa L. (Asteraceae) by very low fluence response
Aquênios sem ornamento do tegumento são insensíveis à luz com ocorrência de germinação sob todas as condições de luz testadas. Aquênios com ornamento verrucoso do tegumento apresentou baixa germinação sob escuro e alta germinação sob luz. A pré-incubação a 36° C para a remoção de Fve pré-existente e pela comparação dos resultados de co
Brazilian Archives of Biology and Technology. Publicado em: 2001-06
-
7. Phytochrome E Controls Light-Induced Germination of Arabidopsis1
Germination of Arabidopsis seeds is light dependent and under phytochrome control. Previously, phytochromes A and B and at least one additional, unspecified phytochrome were shown to be involved in this process. Here, we used a set of photoreceptor mutants to test whether phytochrome D and/or phytochrome E can control germination of Arabidopsis. The results
American Society of Plant Physiologists.
-
8. Phytochrome requires the 6-kDa N-terminal domain for full biological activity.
Phytochrome is a red/far-red-absorbing photoreceptor that controls many aspects of plant photomorphogenesis. Because proteolytic removal of approximately 6 kDa from the N terminus of 124-kDa oat phytochrome substantially alters many physicochemical properties of the chromoprotein, it has been proposed that the N terminus is required for biological activity.
-
9. Rice Phytochrome Is Biologically Active in Transgenic Tobacco.
To investigate the mechanisms of phytochrome action in vivo, we have overexpressed rice phytochrome in transgenic tobacco plants. A full-length rice phytochrome cDNA was fused to the cauliflower mosaic virus 35S promoter and transferred to tobacco. The progeny of some of the transgenic plants contain large amounts of rice phytochrome mRNA in green leaves. Ex
-
10. Immunopurification and Initial Characterization of Dicotyledonous Phytochrome 12
Antiserum was prepared against proteolytically undegraded phytochrome obtained from etiolated zucchini squash (Cucurbita pepo L., cv. Black Beauty). The antiserum was prepared by injecting into a rabbit immunoprecipitates between zucchini phytochrome and specific antiserum against undegraded oat (Avena sativa L., cv. Garry) phytochrome. Specific antiphytochr
-
11. Phytochrome Characterization by Rabbit Antiserum against High Molecular Weight Phytochrome 1
Both small and large sizes of phytochrome purified from Garry oat (Avena sativa L. ev. Garry) as well as large phytochrome purified from Newton oat (A. sativa L. cv. Newton), rye (Secale cereale L. cv. Balbo), barley (Hordeum vulgare L. cv. Harrison), and pea (Pisum sativum L. cv. Alaska) seedlings are characterized by a specific antiserum against large Garr
-
12. In Vivo Properties of Membrane-bound Phytochrome 12
After a 3-minute irradiation with red light, which saturates the phototransformation from the red light-absorbing form of phytochrome to the far red light absorbing form of phytochrome, about 40% of the phytochrome extractable from hooks of etiolated squash seedlings (Cucurbita pepo L. cv. Black Beauty) can be pelleted as Pfr at 17,000g after 30 minutes. Dar