quercus robur/inactivation métabolique

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Effects of tannins on digestion and detoxification activity in gray squirrels (Sciurus carolinensis).

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Acorn tannins may affect food preferences and foraging strategies of squirrels through effects on acorn palatability and digestibility and squirrel physiology. Captive eastern gray squirrels (Sciurus carolinensis) were fed 100% red oak (Quercus rubra) or white oak (Quercus alba) acorn diets to

Chemical ecology of the luna moth : Effects of host plant on detoxification enzyme activity.

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The effects of food plant on larval performance and midgut detoxification enzymes were investigated in larvae of the luna moth,Actias luna. Neonate larvae were fed leaves of black cherry, cottonwood, quaking aspen, white willow, red oak, white oak, tulip tree, paper birch, black walnut, butternut,

The Cd(II)-binding abilities of recombinant Quercus suber metallothionein: bridging the gap between phytochelatins and metallothioneins.

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In this work, we have analyzed both at stoichiometric and at conformational level the Cd(II)-binding features of a type 2 plant metallothionein (MT) (the cork oak, Quercus suber, QsMT). To this end four peptides, the wild-type QsMT and three constructs previously engineered to characterize its

Proteins associated with cork formation in Quercus suber L. stem tissues.

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Cork (phellem) formation in Quercus suber stem was studied by proteomic analysis of young shoots of increasing age (Y0, Y1 and Y4) and recently-formed phellem (Y8Ph) and xylem (Y8X) from an 8-year-old branch. In this study 99 proteins were identified, 45 excised from Y8X and 54 from Y8Ph. These

The importance of oxidases in the tolerance of deciduous leaf infusions by Aedes (Stegomyia) aegypti and Aedes (Stegomyia) albopictus (Diptera: Culicidae).

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Aedes (Stegomyia) aegypti (L.) and Aedes (Stegomyia) albopictus (Skuse) larvae rely on oxidases to reduce toxicity of water soluble toxins from some senescent tree leaf infusions. The mortality of third instar Ae. aegypti larvae in live oak and pin oak leaf infusions increased significantly in the

Antioxidative responses of three oak species under ozone and water stress conditions.

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Plants are frequently exposed to adverse environmental conditions such as drought and ozone (O3). Under these conditions, plants can survive due to their ability to adjust their metabolism. The aim of the present study was to compare the detoxification mechanisms of three oak species showing

An oak (Quercus agrifolia) specialist (Neotoma macrotis) and a sympatric generalist (Neotoma lepida) show similar intakes and digestibilities of oak.

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Dietary specialization is thought to be rare in mammalian herbivores as a result of either a limitation in their detoxification system to metabolize higher doses of plant secondary compounds or deficiencies in nutrients present in a diet composed of a single species of plant. Neotoma macrotis is an

Proteomic perspective of Quercus suber somatic embryogenesis.

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Quercus suber L. is a forest tree with remarkable ecological, social and economic value in the southern Europe ecosystems. To circumvent the difficulties of breeding such long-lived species like Q. suber in a conventional fashion, clonal propagation of Q. suber elite trees can be carried out,

Validation of the stomatal flux approach for the assessment of ozone visible injury in young forest trees. Results from the TOP (transboundary ozone pollution) experiment at Curno, Italy.

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This paper summarises some of the main results of a two-year experiment carried out in an Open-Top Chambers facility in Northern Italy. Seedlings of Populus nigra, Fagus sylvatica, Quercus robur and Fraxinus excelsior have been subjected to different ozone treatments (charcoal-filtered and

Enzymatic adaptations of herbivorous insects and mites to phytochemicals.

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A variety of oxidases, reductases, esterases, epoxide hydrolases, and group transferases in herbivorous insects and mites detoxify and facilitate the excretion of toxic phytochemicals (allelochemicals). Current theory indicates that the cytochrome P-450-dependent mixed-function oxidases (MFOs) are

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