桑の耐旱性と葉肉の組織粉末比重との関係について
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概要
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To study the drought resistance of the mulberry trees, an investigation was made on the specific gravity of the mesophyll tissue powder and the results were as follows. (1) The changes of the specific gravity of the mesophyll tissue powder according to the leaf position on the shoot and also on the one-year-old stem were studied. The value was at the highest on top, getting smaller at the middle while it tended gradually to get higher at the lowest again. When comparison was made at the same leaf order between the races of strong drought resistance it was found as in all cases that the strong ones show more remarkable values than the weak ones, at the various leaf order. (2) A comparison was made between the mulberry leaves on the one-year-old stem of seven races of Morus bombycis (KOIDZ) and those of ten races of Morus al'a (LINN) and those of eight races of Morus latifolia (POIRAT). Sampling of the leaves were made according the morphological basis, that is coloring of lenticels of petioler base and color and shape of their axillary buds. In all cases with few exceptions, the drought hardier races had always greater specific gravity of the mesophyll tissue powder than less hard races. (3) The same relationship between the specific gravity of the mesophyll tissue powder and the drought resistance were obtained in case of the comparison of mulberry trees cultured under different manuring conditions, if the sampling was made according to the same basis mentioned above. (4) Summarizing the above mentioned results. We can conclude that the more drought resistance races of mulberry trees have higher specific gravity of the mesophyll tissue powder than the less drought resistance ones, accordingly the increased dry matter content in the mesophyll of the leaves is supposed to correlate with the higher water holding capacity of the leaves. Sampling the leaves of mulberry trees which are different in growth condition, is found to be done under morphological basis, utilizing the coloring condition of the lenticels of petioler base and axillary buds of leaves.
- 日本生態学会の論文
- 1955-10-31
著者
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