Now showing items 1-10 of 342
The effect of chilling on the photosynthetic activity in coffee (Coffea arabica L.) seedlings. The protective action of chloroplastid pigments
Coffea arabica is considered to be sensitive to low temperatures, being affected throughout its entire life cycle. Injury caused by chilling (low temperatures above zero degree centigrade) is characterized primarily by ...
Theoretical Study of the Absorption Spectra of Photosynthetic Pigments
(Sociedade Brasileira de FísicaÁguas de Lindóia, 2013-05-13)
The first stage of the photosynthetic process is the extraordinary efficiency of sunlight absorption in the visible region . This region corresponds to the maximum of the spectral radiance of the solar emission. The ...
Alterations in chlorophyll a fluorescence, pigment concentrations and lipid peroxidation to chilling temperature in coffee seedlings
Coffea arabica L. is considered to be sensitive to low temperatures throughout its life cycle. In some Brazilian regions, seedling production occurs under shade conditions and during the winter, with average temperatures ...
Evaluation of Rhodocyclus gelatinosus biomass for broiler pigmentation
(Poultry Science Assoc Inc, 2002-03-01)
We evaluated the influence of dietry inclusion of corn gluten meal, apocartenoic acid ethyl ester (APO-EE), canthaxanthin, and Rhodocylus gelatinosus R-1 biomass on broiler carcass color. These oxycarotenoid sources were ...
Nitric oxide reduces oxidative stress generated by lactofen in soybean plants
(Academic Press Inc. Elsevier B.V., 2010-05-01)
Nitric oxide (NO) is a molecule able to directly scavenge ROS and end chain reactions, which can be generated by some herbicides This study aimed to evaluate whether the pretreatment of soybean plants with sodium nitroprusside ...
Physiological and biochemical responses of sugarcane to oxidative stress induced by water deficit and paraquat
Physiological and biochemical responses to oxidative stress induced by paraquat or water deficit were examined in this study with respect to photoinhibition, stomatal conductance, photosynthetic pigments, organic solutes, ...