EFFECT OF CLIMATIC AND SOIL CONDITIONS ON SUGARS AND ORGANIC ACIDS CONTENT OF PEAR FRUITS (PYRUS COMMUNIS L.) CVS. ‘WILLIAMS’ AND ‘CONFERENCE’

The research work is carried out to investigate the effects of climatic and soil conditions on sugars (glucose, fructose, sucrose and sorbitol), soluble solids and organic acids (malic, citric, fumaric and shikimic) of the pear fruits (Pyrus communis L.) cvs. ‘Williams’ and ‘Conference’. The contents of individual sugars and organic acids are very important indicators of internal fruit quality.
We determined the contents of individual sugars and organic acids with the HPLC (High Performance Liquid Chromatography) at harvest.
The experiment comprised three growing region in Slovenia: Krško (south-east of Slovenia), Bistrica ob Sotli (east of Slovenia) and Kamnik (north of Slovenia). The region (soil and climatic condition) had statistically significant effects on the internal quality of pear fruits cvs. ‘Williams’ and ‘Conference’. The highest amount of glucose, fructose, sorbitol and soluble solids and also the lowest content of malic, citric, fumaric and shikimic acids were observed on cv. ‘Williams’ at Bistrica ob Sotli.
The highest content of sucrose, malic, citric and shikimic acids and the lowest content of sorbitol and soluble solids were observed at Krško.
The content of glucose, fructose and sucrose were the lowest in Kamnik.
On cv. ‘Conference’ the content of glucose, fructose, sucrose, malic, citric and shikimic acids were the highest at Krško.
The lowest content of fructose, sucrose, sorbitol, soluble solids, malic and shikimic acids were on cv. ‘Conference’ at Bistrica ob Sotli.

XXVI International Horticultural Congress: Key Processes in the Growth and Cropping of Deciduous Fruit and Nut Trees

M. Hudina, F. Štampar

fruit quality, HPLC

https://doi.org/10.17660/ActaHortic.2004.636.66