Spector D L, Triemer R E
Biosystems. 1981;14(3-4):289-98. doi: 10.1016/0303-2647(81)90035-6.
Chromosome structure and mitosis have been examined in three evolutionarily diverse members of the Pyrrophyta. Chromosome uncoiling, revealing the chromonema, has been correlated with the uptake of [3H]thymidine. In addition, chromosome uncoiling has been observed during gamete formation, gamete fusion, and in the nucleolar organizing region of the chromosomes suggesting that dinoflagellate chromosomes undergoing duplication, transcription or pairing have a morphology different from the characteristic tightly banded structure generally observed during most of interphase and mitosis. The dinoflagellate chromonema is composed of 2.5-nm fibers and 9.0-nm granules coiled into a helix around a central core of 9.0-nm fibers. Chromosome attachment to nuclear channels and kinetochore division and separation have been examined in several dinoflagellates. After evaluating many nuclear and cytoplasmic characteristics of the dinoflagellates it appears that this group of organisms are true eukaryotes which may be on the main line to the evolution of the mitotic spindle typical of higher plant and animals cells.U
对甲藻门三个进化上不同的成员的染色体结构和有丝分裂进行了研究。染色体解旋，暴露出染色丝，这与[3H]胸腺嘧啶核苷的摄取相关。此外，在配子形成、配子融合以及染色体的核仁组织区观察到了染色体解旋，这表明正在进行复制、转录或配对的甲藻染色体具有一种与在大多数间期和有丝分裂期间通常观察到的特征性紧密带状结构不同的形态。甲藻的染色丝由2.5纳米的纤维和9.0纳米的颗粒盘绕成围绕9.0纳米纤维中心核的螺旋结构。在几种甲藻中研究了染色体与核通道的附着以及着丝粒的分裂和分离。在评估了甲藻的许多核和细胞质特征后，看来这组生物体是真正的真核生物，它们可能处于通向高等植物和动物细胞典型有丝分裂纺锤体进化的主线上。
