水稲における側根発生に関する研究 : (II) 二三の異常条件下における側根発生

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In this report the lateral root formation was examined in rice seedlings (Var. Norin No. 1), which were placed under abnormal conditions such as root decapitation, shoot removal and growth in dark. Changes in number, density and TTC reducing activity of lateral roots due to such abnormalities were mainly discussed. Main results were as follows: (1) During the growth of plants without any treatment mentioned above, two types of root growth were observed; the one, in which both of root elongation and lateral root formation were promoted in parallel (Fig. 3a) and the another, in which the former was retarded and the latter accerelated (Fig. 3b). In the second type of growth, root tip was without exception damaged by the unknown cause. (2) In the plant, of which root was decapitated, the lateral roots formation was always promoted (Tab. 1). (3) In both of plants, of which shoot was removed and etiolated by placing in dark, it was also observed that root elongation and lateral roots formation were accelarated (Tab. 1). (4) All lateral roots found in plants of all plats including normal and abnormal, were classified into a, b and c by the degrees of TTC reducing activity. In the abnormal plants it was generally shown that lateral roots with higher stainability decreased and those with lower ability increased (Tab. 2). All of the phenomenon mentioned above showed the same tendencies as these observed in the previous report concerning nutritive abnormality.
日本作物学会の論文
1966-03-25

水稲における側根発生に関する研究 : (II) 二三の異常条件下における側根発生

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