Anthocyanins, soluble sugars, and organic acids play a vital role in the color flavor of grape berries. N KH2PO4 are essential nutrients for growth development. However, research on effects foliar spraying skin grapes under different levels were not systematic. In this study, “Flame seedless” used as test material. There six treatments experiment, including low nitrogen (LN), + (LNK), moderate ...

Numerous genes involved in plant disease defense have been isolated and when introduced and expressed in transgenic plants, fungal and bacterial diseases have been greatly reduced. This strategy is especially appropriate for grapevines, where the industry is rooted in traditional European grapes with strong name recognition and very high disease susceptibility. Our laboratory has developed a se...

During recent years a large annual surplus of grapes has been produced in the United States, and the development of new grape products to take care of this increasing supply is at present an important phase of the grape industry. Because of the general interest in a fruit so abundantly grown, it seemed desirable to study the nutritive value of grapes and grape juices more extensively than had p...

Vascular occlusions are common structural modifications made by many plant species in response to pathogen infection. However, the functional role(s) of occlusions in host plant disease resistance/susceptibility remains controversial. This study focuses on vascular occlusions that form in stem secondary xylem of grapevines (Vitis vinifera) infected with Pierce's disease (PD) and the impact of o...

Comprehensive next generation sequencing virus detection was used to detect the whole spectrum of viruses and viroids in selected grapevines from the Czech Republic. The novel NGS approach was based on sequencing libraries of small RNA isolated from grapevine vascular tissues. Eight previously partially-characterized grapevines of diverse varieties were selected and subjected to analysis: Chard...

The effect of Meloidogyne incognita on growth, general physiological response, and the concentrat ion of reducing and nonreducing sugars at the nematode feeding sites of French Colombard (susceptible) and Thompson Seedless (moderately resistant) Vitis vinifera cultivars was studied up to 2,100 degree-days (DD-base 10 C). Nematode stress dosage, measured as the product of cumulative number of ju...