The Mechanics of Anaphase B in a Basidiomycete as Revealed by Laser Microbeam Microsurgery

Carol J. Bayles, James R. Aist, Michael W. Berns
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引用次数: 14

Abstract

Bayles, C. J., Aist, J. R., and Berns, M. W. 1993. The mechanics of anaphase B in a basidiomycete as revealed by laser microbeam microsurgery. Experimental Mycology 17, 191-199. Cytoplasmic forces were found to be actively pulling on the spindle pole bodies during anaphase B in the dikaryotic, basidiomycete fungus, Helicobasidium mompa. When the spindle of one nucleus was severed with a laser microbeam at mid anaphase B, its two spindle pole bodies separated at a much faster rate than did those of the intact spindle in the other nucleus of the same cell. Since astral microtubule populations apparently reach their maximum during anaphase B in this fungus, we suggest that these microtubules may be involved in the cytoplasmic pulling forces. The spindle appears to act primarily as a governor, regulating the rate at which the spindle pole bodies are separated.

激光微束显微外科技术揭示担子菌B期后期的机制
贝勒,c.j.,阿斯特,j.r.,和伯恩斯,m.w. 1993。激光微束显微手术揭示担子菌B期后期的机制。真菌学学报(自然科学版),17(2):391 - 391。在B期后期,双核真菌、担子菌、mompa Helicobasidium发现细胞质力对纺锤极体有积极的拉动作用。当激光微束在B期中期切断一个细胞核的纺锤体时,其两个纺锤极体的分离速度远快于同一细胞另一个细胞核的完整纺锤体的分离速度。由于星状微管种群在B期后期明显达到最大值,我们认为这些微管可能与细胞质拉力有关。主轴似乎主要充当调速器,调节主轴杆体分离的速率。
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