Xylem Blocking
Mostrando 1-6 de 6 artigos, teses e dissertações.
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1. Postharvest handling of the stems of the Heliconia bihai / Manejo pós-colheita de hastes florais de Heliconia bihai
Objetivando avaliar a longevidade floral de hastes de Heliconia bihai cinco experimentos foram instalados no Laboratório de Fisiologia e Tecnologia, Pós-colheita da Embrapa Agroindústria Tropical em Fortaleza-CE. O primeiro consistiu em submeter às hastes ao recorte a cada 24 ou 48 horas após a colheita. O recorte a cada 24 horas promoveu maior longevid
Publicado em: 2008
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2. Auxin Transport Promotes Arabidopsis Lateral Root Initiation
Lateral root development in Arabidopsis provides a model for the study of hormonal signals that regulate postembryonic organogenesis in higher plants. Lateral roots originate from pairs of pericycle cells, in several cell files positioned opposite the xylem pole, that initiate a series of asymmetric, transverse divisions. The auxin transport inhibitor N-1-na
American Society of Plant Physiologists.
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3. The Time Course of Xylem Differentiation and Its Relation to Deoxyribonucleic Acid Synthesis in Cultured Coleus Stem Segments
The relationship between DNA synthesis and wound xylem differentiation was investigated in cultured stem segments of Coleus blumei. The addition of 50 micrograms of indoleacetic acid per liter to the culture medium resulted in a 400 to 500% increase in the number of wound vessel members formed in 7 days. However, the time course of wound vessel member format
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4. New Insights into the Mechanisms of Water-Stress-Induced Cavitation in Conifers
Cavitation resistance is a key parameter to understand tree drought tolerance but little is known about the mechanisms of air entry into xylem conduits. For conifers three mechanisms have been proposed: (1) a rupture of pit margo microfibrils, (2) a displacement of the pit torus from its normal sealing position over the pit aperture, and (3) a rupture of an
American Society of Plant Biologists.
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5. Reduction of Hydraulic Conductivity during Inhibition of Exudation from Excised Maize and Barley Roots 12
The uncoupler, carbonyl cyanide m-chlorophenyl hydrazone (CCCP) is shown to reduce the hydraulic conductivity of barley, maize, mung bean, and onion roots. In barley and maize, the reduction in exudation from excised roots is partly due to the reduction in the permeability of the root to water (Ip), but it can be inferred that the rate of salt release to the
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6. Auxin-Mediated Cell Cycle Activation during Early Lateral Root Initiation
Lateral root formation can be divided into two major phases: pericycle activation and meristem establishment. In Arabidopsis, the first lateral root initiation event is spatially and temporally asynchronous and involves a limited number of cells in the xylem pericycle. To study the molecular regulation during pericycle activation, we developed a lateral root
American Society of Plant Biologists.