JOURNAL OF THE COLLEGE OF SCIENCE, IMPERIAL UNIVERSITY, TOKYO. 

 VOL. XXXVIII., ARTICLE 6. 



Injection Experiments on Plants. 



By 



Yasutaro YENDO, RujakusM, NögakmM. 



With tioo Plates. 



I. Introduction. 



The first experiments of injections into the plant body were 

 made by Ekhaet (1) and Reichakd. They experimented with 8 

 species of plants, employing various solutions, and showed the 

 possibility of introducing by injection extraneous substances into 

 the sap of the plant body although the efïects varied according to 

 the material employed. 



Some experiments have recently been made for particular 

 purposes, in which the injection method was used. Weber (2) 

 succeeded, for example, in influencing the unfolding of winter 

 buds by means of a water- injection, Jesenko (3) made similar 

 researches, employing certain chemical substances. On the whole, 

 the investigations which hitherto have been made on this subject 

 are scanty, but interesting in the results. 



As Peof. Miyoshi (4) has remarked, the organisation of plants 

 differs from that of animals in respect to the imperfeetness of 

 the circulating system and the higher grade of individuality of 

 several parts, so that we cannot expect to apply the injection 



