Differences in the mineral composition of sound and disordered apple fruits and of sound and pitted tissue

✍ Scribed by Michael A. Perring; Witold Plocharski

• Publisher: John Wiley and Sons
• Year: 1975
• Tongue: English
• Weight: 239 KB
• Volume: 26
• Category: Article
• ISSN: 0022-5142
• DOI: 10.1002/jsfa.2740261203

✦ Synopsis

Abstract

Separation and analyses of sound Cox's Orange Pippin apples and those with disorders, after storage for 18 weeks at 3.3°C, revealed that sound apples had the lowest, apples rotted by Gloeosporium spp slightly higher, apples with bitter pit higher, and apples affected by breakdown even higher proportions of calcium in the residue after extraction with distilled water, although total concentrations of calcium in these samples were in the reverse order. Lower proportions of calcium, magnesium and potassium were extracted by 75% ethanol from fruit with breakdown than from sound apples, and similarly lower proportions of magnesium, and magnesium and potassium were extracted by water from apples with bitter pit and breakdown, respectively. Proportions of phosphorus extracted by either solvent were not obviously related to disorders. The high concentration of magnesium in pitted tissue, in relation to that in adjacent sound tissue, was evenly divided between the fractions soluble and insoluble in water, but that of calcium was mainly in the insoluble fraction.