this study aimed to determine the effects of different shading ratio and covers on “sultana seedless” table grape quality and storability. grapevines were covered at the veraison stage with 3 shading nets (0, 35, and 75% shading), which were then replaced with covering materials including polypropylene cross-stitch (pc), life pack (lp) and mogul (mg), just before harvest. harvested grapes in al...

Quantitative and qualitative analysis of phenolics and boron in stigma of transient sterile Tecoma stans L. during seedless (May-July), partially seedbearing (August-November, April) and seedbearing periods (December-March) was made. UV absorption profile of stigmatic exudates indicated the presence of simple phenolics. Total phenolics were higher in stigma during seedless period. Thin layer ch...

Abstract The color of 'Crimson Seedless' berries is a major constraint in expanding marketing and export potential. target this investigation to enhance the quality by using brassinolide (BL) girdling treatments, individually combination, as an alternative ethephon over two consecutive seasons. obtained results revealed that combined treatment BL at 2.0 mg/L recorded highest significant yield v...

Pierce's Disease (PD) of grapevines, caused by Xylella fastidiosa subsp. fastidiosa (Xf), is a limiting factor in the cultivation of grapevines in the US. There are presently no effective control methods to prevent or treat PD. The therapeutic and prophylactic efficacy of a phage cocktail composed of four virulent (lytic) phages was evaluated for control of PD. Xf levels in grapevines were sign...

Pre-embryogenic calli were obtained from the culture of fertilized immature ovules of muscadine ( Vitis rotundifolia Michx.) and seedless bunch grapes ( Vitis vinifera L.) on: 1) Murashige & Turcker (MT, 1969) basal medium supplemented with 4.4 μM 2, 4-D (2, 4-dichlorophenoxyacetic acid) and 1 μM BA (6-benzyladenine) with 6.0% (w/v) sucrose; 2) Chee and Pool (CP, 1978) basal medium supplemented...

A co-transformation system was developed to produce grapevines free of selectable marker genes. This was achieved by transforming Vitis vinifera L. ‘Thompson Seedless’ somatic embryos with a mixture of two Agrobacterium strains. The first strain contained a binary plasmid with an egfp gene of interest between the T-DNA borders. The second strain harbored the neomycin phosphotransferase (nptII) ...