S. Afr. J. Enol. Vitic., Vol. 35, No. 2, 2014 *Corresponding author: [email protected] [Tel./fax: +86 10 62737553] Acknowledgements: This work was financially supported by the Natural Science Foundation of China (No. 31171786), the Special Fund for Agro-scientific Research in the Public Interest (No. 201303076-03) and the China Agriculture Research System (CARS-30) Separation and Purification of ...

Appearance of a lag period dependent on pH in the expression of the catecholase activity of a polyphenoloxidase extracted in a latent state from Airen grape (Vitis vinifera L.) berries, is revealed, suggesting the hysteretic nature of the enzyme. The lag time was independent of enzyme concentration, indicating that slow pH-induced conformational changes in the protein must occur during assay. R...

introduction: many reports have shown that the grape (vitis vinifera) seed extract induces antioxidant, hypotensive hypolipidemic, and vasodilatory effects. we have recently shown the relaxatory effect of grape leaf extract on rat's aorta, ileum, uterus and frog's heart rate and contractility. the objective of this study was to investigate the spasmolytic effect of vitis vinifera leaf hydroalco...

introduction: in order to study the effects of turpentine oil on the concentration of lipids and lipoproteins of rabbit ( as an animal model for human studies )35 healthy female rabbits were chosen and then randomly allocated into 13 groups. different percents of turpentine oil and other oil compounds like vegetable oil, cholesterol and animal oil were given to each group ( 5 rabbits ) separate...

GRAS transcription factors are involved in many processes of plant growth and development (e.g., axillary shoot meristem formation, root radial patterning, nodule morphogenesis, arbuscular development) as well as in plant disease resistance and abiotic stress responses. However, little information is available concerning this gene family in grapevine (Vitis vinifera L.), an economically importa...

Introduction Fanleaf degeneration/decline disease is one of the most severe viral disease complexes of grapevine worldwide. It is also one of the oldest known viral diseases of Vitis vinifera with descriptions of symptoms being reported in Europe as early as 1841. This disease is now known to affect grapevines in all temperate regions where Vitis vinifera and hybrid rootstocks are grown. Within...

The genus Vitis is represented by several coexisting species in Europe. Our study focuses on naturalised rootstocks that originate in viticulture. The consequences of their presence to the landscape and to native European species (Vitis vinifera ssp. silvestris) are evaluated. This study compares ecological traits (seven qualitative and quantitative descriptors) and the genetic diversity (10 SS...

We report here the cloning and optimized expression at 16 degrees C and the characterization of a Vitis vinifera UDP-glucose:flavonoid 3-O-glucosyltransferase, an enzyme responsible for a late step in grapevine anthocyanin biosynthesis. The properties of this and other UDP-glucose:flavonoid 3-O-glucosyltransferases, homologues of the product encoded by the maize Bronze-1 locus, are a matter of ...

Tocopherols and tocotrienols are present in mature seeds. Yet, little is known about the physiological role and the metabolism of these compounds during seed development. Here we present data on tocopherol and tocotrienol accumulation during seed development in Vitis vinifera L. cv. Albert Lavallée (Royal). This species was chosen for its ability to synthesize both tocopherols and tocotrienols....