Now showing items 21-30 of 2734
Atrazine and Methyl viologen effects on Chlorophyll-a fluorescence revisited. Implications in Photosystems Emission and Ecotoxicity Assessment
In this work, we use the effect of herbicides that affect the photosynthetic chain at dened sites in the photosynthetic reaction steps to derive information about the uorescence emission of photosystems. The interpretation ...
Effect of arsenic on reflectance spectra and chlorophyll fluorescence of aquatic plants
Arsenic pollution of groundwater is a serious problem in many regions of Latin America that causes severe risks to human health. As a consequence, non-destructive monitoring methodologies, sensitive to arsenic presence in ...
Estimativa da necessidade de nitrogênio em cobertura no feijoeiro IAC Alvorada com clorofilômetro portátil
(Universidade Estadual de Londrina (UEL), 2013-01-01)
The aims of this study was evaluated the efficiency of nitrogen sufficiency index (NSI) calculated with base on the measures relative chlorophyll index (RCI) leaves, measured with portable chlorophyll meter, as an indicator ...
Indirect method for quantifying the content of photosynthetic pigments in genotypes of dwarf elephant grass
(Editora da Universidade Estadual de Maringá (EDUEM), 2014)
Eucalyptus ESTs corresponding to the protoporphyrinogen IX oxidase enzyme related to the synthesis of heme, chlorophyll, and to the action of herbicides
This work was aimed at locating Eucalyptus ESTs corresponding to the PROTOX or PPO enzyme (Protoporphyrinogen IX oxidase, E.C. 188.8.131.52) directly related to resistance to herbicides that promote oxidative stress, changing ...
Increased Nicotiana tabacum fitness through positive regulation of carotenoid, gibberellin and chlorophyll pathways promoted by Daucus carota lycopene β-cyclase (Dclcyb1) expression
(Oxford University Press, 2016)
© 2016 The Author 2016. Published by Oxford University Press on behalf of the Society for Experimental Biology. Carotenoids, chlorophylls and gibberellins are derived from the common precursor geranylgeranyl diphosphate ...
In vivo observation of chlorophyll fluorescence quenching induced by gold nanoparticles
To our knowledge, the present work reports the first in vivo observation of chlorophyll a fluorescence quenching induced by gold nanoparticles. Laser-induced fluorescence spectroscopy was used to collect in vivo chlorophyll ...