美国科学家研究出繁殖马铃薯的新方法。他们用消化细胞壁的酶处理马铃薯叶子的细胞,把这些无细胞壁的细胞(即原生质体)放在适当的培养基中培养,每个细胞开始形成新的细胞壁并且进行细胞分裂,产生愈伤组织,然后由愈伤组织长出新枝条,最后发育成一株成熟的马铃薯植株。 American scientists have developed a new method of breeding potatoes. They treated the cells of potato leaves with enzymes that digested the cell walls, cultured them in appropriate media with cells without cells (ie, protoplasts). Each cell started to form new cell walls and divide into cells, producing callus, Then new shoots grow from the callus and finally develop into a mature potato plant.