Restriction of 45Calcium Translocation into Apple Fruit by 2,3,5-Triiodobenzoic Acid1

Abstract Calcium translocation into the fruit of the ‘Golden Delicious’ apple was restricted by applications of 2,3,5-triiodobenzoic acid (TIBA) applied 2, 4, and 6 weeks after anthesis whereas Ca translocation into the leaves and into the shoots was virtually unaffected. Ca translocation was measured by introducing 0.01 m CaCl 2 + 45 Ca into the cut end of previously sprayed shoots and by measuring 45 ca translocation into various parts. TIBA applied nearer to anthesis was more effective in decreasing Ca translocation.