日本采用生物技术开发了大量繁殖白杨等阔叶树生长点的新方法。他们将白杨等阔叶树的生长点切成○点五——一毫米大小,放入试管里,试管里先加入促进细胞分裂与增生的特殊生长激素。然后,将试管固定到无菌室的旋转培养装置上,在强度为一万勒克斯的光照条件下旋转培养。约经一个月,试管里就会产生出无数个生长点来,将这些新生长点转移到了另外一些激素的琼脂培养基上,再进一步培养,生长点就能长出根来。 Japan adopted biotechnology to develop a new method of breeding a large number of broad-leaved tree growth points such as poplar. They cut the growth points of broadleaf trees, such as poplar, between 0.5mm and one millimeter and put them in a test tube where they are given special growth hormones that promote cell division and proliferation. Then, the test tube was fixed on a rotary culture device of a sterile room, and the culture was rotary cultured in the light of an intensity of 10,000 lux. About a month later, there will be countless growth points in test tubes. These new growth points will be transferred to other hormone agar mediums, and further cultivation will take place.