DYNAMIC ORGANIZATION OF PLANT MICROTUBULES AT THE 3 DISTINCT TRANSITION POINTS DURING THE CELL-CYCLE PROGRESSION OF SYNCHRONIZED TOBACCO BY-2 CELLS

被引:51
作者
HASEZAWA, S [1 ]
NAGATA, T [1 ]
机构
[1] SEIJO UNIV,SEIJO JR COLL,DEPT GEN EDUC,SETAGAYA KU,TOKYO 157,JAPAN
来源
BOTANICA ACTA | 1991年 / 104卷 / 03期
关键词
APHIDICOLIN; CELL CYCLE; CELL SYNCHRONIZATION; IMMUNOFLUORESCENCE; MICROTUBULE(S); PROPYZAMIDE; TOBACCO BY-2 CELLS;
D O I
10.1111/j.1438-8677.1991.tb00218.x
中图分类号
Q94 [植物学];
学科分类号
071001 ;
摘要
Dynamic changes of microtubule (MT) configuration have been examined during the cell cycle progression in tobacco BY-2 cells, which have been highly synchronized by aphidicolin treatment. Although it has been shown previously that four cell cycle stages display characteristic features of MTs (Hasezawa et al., 1991), distinct changes of MT configuration were observed at the interfaces of G2/M, M/G1 and G1/S, and the frequency of appearance of such distinct structures were quantitatively examined. Among others, it is the first observation that at M/G1 disintegrating phragmoplasts coexisted with short MTs in the perinuclear envelopes, but the MTs disappeared in the later stage, when cortical MTs were organizing. Thus it is supposed that cortical MTs originate from the transiently observed short MTs in the perinuclear region. This observation offered also an experimental system to analyze the molecular changes of MTs at the three interfaces during cell cycle progression in plant cells, as the mass culture of tobacco BY-2 cells is readily available.
引用
收藏
页码:206 / 211
页数:6
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