Study of a progressive failure in anchor problem
1999
Sakai, T. (Ehime Univ., Matsuyama (Japan). Coll. of Agriculture)
Watercore occurrence, ethylene production, and sorbitol content were compared in watercore-resistant "Mutsu" and sensitive "Fuji" apples (Malus pumila Mill. var. domestica Schneid). grown in Niigata and Ehime. Meant air temperatures in Niigata were lower than those in Ehime. Watercore occurrence started at the end of October in "Fuji" apples in Niigata, while began three weeks later in Ehime. Fruit in Niigata were larger than those in Ehime in both cultivars. Ethylene evolution in "Mutsu" apples grown in Niigata and Ehime increased after middle October and early November, respectively. Ethylene production in "Fuji" was lower than that in "Mutsu" and it decreased during fruit maturation in both districts. The glucose content of apples in Niigata was lower than that in Ehime in both cultivars. The sucrose level in "Mutsu" was higher in Niigata than in Ehime. The sorbitol content in "Fuji" in Ehime increased and stayed at a higher level during fruit maturation than that in Niigata, but there was no difference between the two districts for "Mutsu" apples. No marked difference in sorbitol content between the inner and outer flesh tissues was observed, not even in watercored "Fuji" fruit
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