Differences in dry matter production and assimilate partitioning of apple [Malus pumila] on M.9 EMLA rootstock
1998
Inomata, Y. (National Inst. of Fruit Tree Science, Morioka (Japan). Apple Research Center) | Wada, M. | Ono, T, | Suzuki, K. | Masuda, T.
The differences in the dry matter production (DM) and the assimilate partitioning in each organ among "Sansa", "American Summer Pearmain", "Golden Delicious", "Orin", "Fuji" and "Ralls Janet" of 6-year-old apple tees on M.9 EMLA rootstock, trained to a central leader were studied. The trunk area was largest in "Orin" it diminished in the order of "Fuji", "Golden Delicious", "Ralls Janet", "American Summer Pearmain", and "Sansa". The leaf area and leaf area index of "Golden Delicious" are 1.8 time greater than those of "Sansa". A significant correlation (r=0.780) between the trunk girth measured early in the growing season and the total leaf area per tree existed in all cultivars. Total DM of the crop was largest in "Fuji" followed in the order of "Golden Delicious", "Orin", "American Summer Pearmain", "Ralls Janet", and "Sansa". "Fuji" fruits accumulated 2.7 times more dry weight (F) than did "American Summer Pearmain". DM per leaf (L) was largest in "Fuji", succeeded in the order of "Orin", "Ralls Janet", "Golden Delicious", "Sansa", "American Summer Pearmain". The DM per leaf of "Fuji" was 1.4 time that of "American Summer Pearmain". There are significant correlations between the trunk girth measured early in the growing season and DM (r=0.861), and F (r=0.866), independent at cultivars. There are significant correlations between DM and F (r=0.894), and DM per L and F per L (r=0.911), independent at cultivars
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