美国威土康星大学的科学家采用树木单成功。在过去若干年间,基因工程师一直致力于并能够应用无性系繁殖技术培育草本植物,但在将此技术用于木本植物的研究方面一筹莫展,木本植物细胞壁的特殊构造是一大障碍。美国康星大学的麦科思教授自1986年培育出第一棵白杨树苗以 Scientists at the University of the Wertullines in the United States have succeeded in using trees alone. Over the past few years, genetic engineers have been committed and able to apply clonal propagation techniques to cultivate herbs, but the application of this technique to the study of woody plants failed to do so. The special structure of the plant cell wall is a major obstacle. Professor McCone of the United States Kangxing University since 1986 to cultivate the first poplar seedlings