Chlorophyll A Fluorescence Transient
Mostrando 1-12 de 22 artigos, teses e dissertações.
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1. The chlorophyll a fluorescence as an indicator of the temperature stress in the leaves of Prunus persica
Plants growing in temperate regions are often exposed to stress conditions caused by high temperatures. Photosynthesis is one of the metabolic processes most sensitive to high temperature stress, and it is often inhibited before other cellular functions. Using peach leaf disks, we studied the transient chlorophyll a fluorescence along with the gas exchanges
Braz. J. Plant Physiol.. Publicado em: 25/02/2013
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2. Effects of n-propyl gallate on photosynthesis and physiological parameters in Dunaliella salina are affected by stressful conditions
We studied the effects of n-propyl gallate, which is a plastid terminal oxidase inhibitor involved in chlororespiration, on photosynthesis and physiological parameters in Dunaliella salina grown under different salinities and under low or high irradiance using chlorophyll a fluorescence transient measurements and pigment analysis. The inhibitor up to 1 mM ha
Braz. J. Plant Physiol.. Publicado em: 2012-09
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3. Desempenho fotossintético de plantas de Jatropha curcas L. cultivadas no Estado Espírito Santo
In this work we used plants of Jatropha (Jatropha curcas L.) in the same stage of development and under the same conditions of cultural management, grown in two commercial farms: one in the north coast (Depth of Ipiranga, Linhares) and the other in northwest, mountainous (Itarana) State of the Holy Spirit in order to evaluate the photosynthetic performance i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/12/2011
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4. Fotossíntese em folhas e frutos do mamoeiro (Carica papaya l.) cv. Golden
O mamoeiro (Carica papaya L.) é uma planta sensível às alterações ambientais o que demanda respostas, nas características fisiológicas e reprodutivas, durante o seu desenvolvimento. Por ser de grande importância econômica para o Estado do Espírito Santo, estudos sobre os efeitos dos estresses ambientais nesta espécie são fundamentais para garanti
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/12/2011
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5. Caracterização morfológica, fisiológica e bioquímica da Corticeira-do-banhado em condições de alagamento / Caracterização morfológica, fisiológica e bioquímica da Corticeira-do-banhado em condições de alagamento / Morphological, physiological and biochemical caracterization of Corticeira-do-banhado in flooding conditions / Morphological, physiological and biochemical caracterization of Corticeira-do-banhado in flooding conditions
The Erythrina crista-galli L., popularly known as corticeira-do-banhado, is a medium sized tree belonging to family Fabaceae, known especially for their vibrant colored flowers. The cork is listed as a plant immune to the court, by CONAMA, such is the devastation of their habitat and due to its importance in the restoration of riparian vegetation and restora
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 29/09/2011
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6. CULTIVARES DE CANA-DE-AÇÚCAR SUBMETIDO À RESTRIÇÃO HÍDRICA. / CULTIVARS OF SUGAR CANE SUBMITTED TO WATER RESTRICTION.
The increasing demand for biofuels has provided significant increases in the areas of sugar cane in Brazil and in recent decades,and long periods of drought have limited the production of this species. This study aimed to evaluate the performance of cultivars RB 85-5536 and RB 93-509 of cane sugar on water restriction during the first stages of development.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/02/2011
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7. Chlorophyll a fluorescence as indicative of the salt stress on Brassica napus L.
The effects of salinity stress on chlorophyll fluorescence and the growth of Brassica napus L were investigated. The chlorophyll a fluorescence transient were recorded and analyzed according to the JIP-test which can quantify PSII performance. Salt stress resulted in decreased leaf area and dry matter compared with the control treatment (0 mM NaCl). The most
Brazilian Journal of Plant Physiology. Publicado em: 2011
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8. Chlorophyll Fluorescence Induction in Leaves of Phaseolus vulgaris Infected with Bean Rust (Uromyces appendiculatus).
To our knowledge, this report describes the first application of video imaging of Chl fluorescence to the study of light utilization in photosystem II of attached leaves of Phaseolus vulgaris infected with the obligate biotrophic fungus Uromyces appendiculatus (race 38). The video-based detection system produced a spatially resolved, quantifiable signal that
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9. Characterization of the Light-induced Transient States of the Chlorophyll Proteins 668 and 743 from Atriplex rosea
The light-induced transient states of chlorophyll-protein 668 (Cp668) and its photoconverted from Cp743 were investigated using flash photolysis. Short lived transient species induced by a short flash were detected in both Cp668 and Cp743. The Cp668 transient had a half decay time of 2.0 milliseconds and showed a broad absorption band at 460 nanometers. The
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10. Effects of Cations and Abscisic Acid on Chlorophyll a Fluorescence in Guard Cells of Vicia faba1
The effects of cations and abscisic acid on chloroplast activity in guard cells of Vicia faba were investigated by analysis of the transient of chlorophyll a fluorescence. When epidermal strips containing guard cells as the only living cells were incubated in water and illuminated with strong light, chlorophyll a fluorescence rose rapidly to a high intensity
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11. Chlorophyll a Fluorescence Transients in Mesophyll and Guard Cells 1: MODULATION OF GUARD CELL PHOTOPHOSPHORYLATION BY CO2
Chlorophyll fluorescence transients from mesophyll and guard cell chloroplasts of variegated leaves from Chlorophytum comosum were compared using high resolution fluorescence spectroscopy. Like their mesophyll counterparts, guard cell chloroplasts showed the OPS fluorescence transient indicating the operation of the linear electron transport and the possible
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12. Steady-State Chlorophyll a Fluorescence Transients during Ammonium Assimilation by the N-Limited Green Alga Selenastrum minutum1
The assimilation of ammonium by the N-limited green alga Selenastrum minutum results in the suppression of photosynthetic electron flow from H2O to CO2 (6, 7, 18). In this study, results are presented which describe the correponding change in steady-state chlorophyll a fluorescence. The addition of ammonium resulted in a transient decline in fluorescence fol