Spontaneous Reduction of Somatic Chromosomes in Haplopappus gracilis
Spontaneous Reduction of Somatic Chromosomes in Haplopappus gracilis
复制标题
细小兔体细胞染色体的自发减少
作者：
I. Ames;J. Mitra
在几个植物属中观察到了自发的和诱导的单倍性。在胡萝卜次生韧皮部组织培养物中发现了单倍性3，在纤细单冠果的茎组织培养物中也发现了单倍性和体细胞配对4。最近，在细单冠果幼苗的叶原基中观察到自发发生的单倍体细胞。本通讯的目的是报告自发减少体细胞染色体数目的根分生组织的细单冠毛。
THE occurrence of spontaneous1, as well as induced2, haploidy has been observed in several plant genera. Haploidy has been reported in cultures from secondary phloem tissue of carrot3, and haploidy and somatic pairing have also been noted in cultured stem tissue of Haplopappus gracilis4. Recently, haploid cells were observed to occur spontaneously in leaf primordia of young seedlings of Haplopappus gracilis5. The purpose of this communication is to report spontaneous reduction in the number of somatic chromosomes in the root meristem of Haplopappus gracilis.