| 概要 |
The purpose of this work is to compare the leaf respiration of the diseased paulownia infected with witches-broom with that of the healthy one. Each five leaves from the top of a shoot of the health...y plant and the diseased one respectively were used to measure the respiration quantity. To estimate the respiration quantity of the ten leaves at the same time the applied Wahrburg apparatus with eleven tubes were used. The results of the experiments are shown velow. 1. The respiration quantity scarcely varies within tow or three hours after picking leaves, and on this point no significant differences between the healthy and the diseased leaves were found. 2. The upper leaves have always greater respiration quantity than the lower ones, and this is recognized through the experiments on the samples picked and measured at 7 A.M., 10 A.M., 3 P.M. and 7 P.M. respectively. 3. The respiration quantity varies significantly with the leaf order, the upper leaves have greater respiration quantity than the lower ones. No difference is found between the healthy leaves and the diseased ones on this respects. 4. If the healthy leaf and the deseased one in the same leaf order are compreared, it seems likely that the later is greater in its respiration quantity than the former, though no significant differences have been obtained in my expriment. 5. The leaves of the secondary shoots grown up by the stimulation of witches'-broom disease show the same relation of the respiration quantity with the leaf order as that of the healthy ones.続きを見る
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