The Biochemistry of Bakanae Fungus

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Abstract
1). The effect of gibberellin was investigated to rice plants dealing with the following special items: composition, cell elongation, yield, etc. The plant was cultured in water culture; and the gibberellin used was of a crude form. 2) Treated with gibberellin, the youngest leaves began to elongate, and increased their moisture contents as well as fresh weights at an early period, and dry weights at the later (Table 1 and 2). 3) In the leaf sheath of the plant, treated with gibberellin, sucrose and starch decreas-ed, hemicellulose and cellulose somewhat increased, and reducing sugar as well as watersoluble hemireserves remained unchanged (Table 3). Considerable decrease of sucrose occurred before the elongation of leaves, caused by the application of gibberellin (Table 2). 4) Gibberellin application caused the cell of leaf sheath to increase in length and decrease in width (Table 4), but not to change the osmotic pressure of the sap, the pressure being estimated by plasmolytic method. 5) By the application of gibberellin, tops increased remarkably their length, ; llering was depressed (Table 5), and grain decreased its yield, but the straw productior of the plant was favored, when cultured until the harvest time (Table 6).

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