Relation between Calcium Concentration, Respiration, Respiratory Control Ratio, and ADP:O Ratio of Mitochondria Isolated from Normal and Cork Spotted 'Anjou' Pear Fruit PDF

Keywords

pear, calcium, mitochondria

Abstract

Calcium concentration in mitochondria isolated from 'Anjou' pear (Pyrus communis L.) fruit affected with cork sport (3.26 nanograms Ca/mg of mitochondrial protein) was significantly lower than Ca concentration in mitochondria isolated from normal fruits (7.06 nanograms Ca/mg of mitochondrial protein). State III respiration, respiratory control ratio, and ADP:O ratio were significantly higher in mitochondria isolated from normal fruits than in mitochondria isolated from cork spotted fruits. The results suggest that calcium deficiency reduced the functional integrity of the mitochondria isolated from ripe 'Anjou' pear fruit.