タイヌビエ種子の休眠覚醒作用に関する研究 : 第2報数種阻害剤による休眠覚醒効果とその変動

概要

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This paper forms the second part of a series of investigations on the control of the breaking of dormancy in barnyardgrass (Echinochloa Crusgalli Beauv. var. oryzicola Ohwi) seed. This investigation evaluated the change of the dormancy-breaking effect of several inhibitors against oxidation-reduction system through the process of the breaking of dormancy. 1) In deep dormancy stage, 8-oxyquinoline, KCN, DIECA, HgCl_2, Na_2S and salicylaldoxime-all showed a stimulative effect on the breaking of dormancy in considerable degree. But thiourea, NaN_3 and BAL had no effect. 2) In deep dormancy stage, the inhibition of oxygen uptake by salicyladoxime, DIECA or HgCl_2 was no more than 30 percent under the treatment inducing the dormancy-breaking effect. In addition, thiourea did not inhibit the oxygen uptake under the same treatment. 3) In shallow dormancy stage, the dormancy-breaking effect of KCN and HgCl_2 increased remarkably. However, 8-oxyquinoline, DIECA and salicylaldoxime showed less effect than KCN and HgCl_2. 4) The effect of 8-oxyquinoline in shallow stage was inferior to the level in deep stage by all means of treated period or concentration. 5) On the contrary, NaN_3 had a noted effect only in shallow stage. These results indicate that the endogenous mechanism of dormancy in barnyardgrass is changing gradually, corresponding with the environmental conditions.
日本作物学会の論文
1972-12-28