Studies on the nutrition of rice plant with reference to Helminthosporium leaf spot : Preliminary report : IV. Nitrogen metabolism as affected by hydrogen sulphide.

[摘要] In order to demonstrate the influence of hydrogen sulphide added to nutrient solution on the nitrogen metabolism of rice plant, we determined the amounts of nitrogen fractions such as ammonium-N, amide-N, soluble-N and protein-N per 1 gram green or dry weight in the plant treated with different amounts of hydrogen sulphide. The results of experiments are as follows: - (1) When a large amount of hydrogen sulphide is added to the solution, ammonium-N, protein-N and total-N decreased, while on the contrary soluble-N often increased, and every when soluble-N did not show any increase, ratio of soluble-N to protein-N decreased. (2) The fact that the ratio of soluble-N to protein-N increases due to hydrogen sulphide seems to indicate that protein synthesis in the plant might be disturbed by hydrogen sulphide. And such a disturbance in protein synthesis may be attributable in part to the reduction in the absorption of some nutrients such as potassium, which is known to promote the protein synthesis, and in part to the retardation of the normal aerobic metabolism (respiration) due to hydrogen sulphide.

[学科分类] 农业科学（综合）