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Articles by F. Mizutani
Total Records ( 2 ) for F. Mizutani
  A.B.M. Sharif Hossain , F. Mizutani and Justus M. Onguso
  Effects of partial and complete ringing in the trunk on overall nutrient status of peach (Prunus persica Batsch. cv. `Hikawahakuho`) trees were examined by using one-year-old trees. The partial ringing comprised removal of 2 cm length bark and remaining 2 mm strip whereas complete ringing no remaining strip. Organic (sugar and starch) and inorganic nutrient content in leaves, stems and roots were monitored for eight weeks after ringing. The treatment reduced overall reduction in sugar and starch content in all plant parts. Each sugar component also showed similar trends. The N and Ca content in the above ground parts were lower in the ringed plants than control but the reverse was true in the roots. On the other hand, P, K and Mg content in all plant parts were declined by the treatment. Partial ringing prevented the translocation of 13C-photosynthates from the above ground parts to roots although entire inhibition was apparent in the complete ringing. Such reduction in energy sources of the roots seemed to affect overall plant nutrition which leads to small sized trees.
  A.R. El-Shereif , F. Mizutani , J.M. Onguso and A.B.M. Sharif Hossain
  Effects of different temperatures on bud break and ACC content were examined by using canes of `Muscat Bailey A` grapevines (Bailey x Muscat Hamburg) collected monthly from October to February. The canes were kept at 1 and 24°C for 1, 2 and 4 weeks. Bud break was evaluated at 24°C by using single-eye cuttings. Low temperature was more effective on bud break in October and November, while little differences were noted between 1 and 24°C in December. However, high temperature was more effective in January and February. ACC content was significantly greater under low temperature in October and November but the reverse was true after two weeks of temperature treatments from December to February. Thus, these data indicate that chilling requirement for bud break of grapevines seems to be associated with the promotion of ethylene biosynthesis caused by low temperature stress.
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