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美国农业研究局的科研人员研究出一种可以延缓甚至停止甘薯生长的方法。将生长培养基的碳水化合物浓度由3%降至2%,并将温度降至70°F。在这种条件下,试管中的植株生长完全正常,绿色的叶片富有活力,只是植株的生长速度极慢。
Researchers at the Bureau of Agricultural Research have come up with a way to delay or even stop the growth of sweet potatoes. The carbohydrate concentration in the growth medium was reduced from 3% to 2% and the temperature was reduced to 70 ° F. Under these conditions, the plants in the test tube grew completely normal and the green leaves were viable, except that the plants grew very slowly.