Sugar and organic acid content of tomato fruits (Lycopersicon lycopersicumMill.) grown on aeroponics at different plant density

The quality of tomato fruits (Lycopersicon lycopersicum Mill.) depends on f actors such as production conditions, the chosen cultivar, fertilisation, p lant density, etc. The quality of tomato fruits cv. 'Arletta' grown on aero ponics has been analysed. The influence of plant density and pruning on yie ld quantity and quality was measured. Quality components were determined by high performance liquid chromatography (HPLC). The contents of sugars (suc rose, glucose, fructose and xylose) and organic acids (citric, malic, shiki mic and fumaric acid) were analysed separately with regard to different pla nt density - 12, 16, 20 and 24 plants m(-2) production surface. Evaluations showed that the differences in tomato quality, regarding the sugar (sucros e 0.46 g kg(-1), glucose 14.31 g kg(-1), fructose 12.06 g kg(-1), xylose 0. 27 g kg(-1)) and acid content (citric 7.79 g kg(-1), malic 0.68 g kg(-1), s hikimic 4.36 g kg(-1), fumaric 14.34 g kg(-1)) are not significant statisti cally with regard to plant density.