观察到在萝卜生长初期除掉子叶影响萝卜生长。为了搞清楚这种现象,对子叶在萝卜生长中的作用进行了试验。在黑暗的环境中子叶干重减少其他器官增加,在有光的条件下各器官都增加。然而,去掉子叶的作物即使在有光的条件下生长,根和胚轴的干重都减少,真叶却没看到减少。从这个结果看,结论是:子叶是“源”,其他器官是“坑”。 It was observed that removal of cotyledons affected radish growth in the early stages of radish growth. In order to clarify this phenomenon, the effect of cotyledons on radish growth was tested. In a dark environment, dry weight of cotyledons increased in other organs and increased in all organs under light conditions. However, the cotyledons, even when grown in bright conditions, lost their dry weight on both the root and the hypocotyls, while the true leaves did not see any decrease. From this result, the conclusion is: cotyledons are “source” and other organs are “pit.”