被子植物小孢子发生中细胞质的分化(综述)  

The Cytoplasmic Differentiation during Microsporogenesis of Angiosperms

作　　者：王毅[1] 娄成后[2] 胡适宜[3] 

机构地区：[1]中国农科院蔬菜研究所,北京100081 [2]北京农业大学生物学院 [3]北京大学生物系

出　　处：《北京农业大学学报》1994年第1期108-114,共7页

摘　　要：实验结果表明在被子植物小孢子发生过程中有明显的细胞质分化。这主要包括小孢子母细胞减数分裂过程中细胞质中核糖体数量迅速减少和恢复,以及质体和线粒体形态结构的脱分化和再分化的周期性变化。这些变化认为是消除孢子体时期一些细胞质因子,转向配子体发育的过程,而与减数分裂无关。Experimental results presented indicates observous cytoplasmic differentiation does exist during microsporogenesis of some angiosperms.These mainly involve the periodic change of ribosome den- sity,the dedifferentiation and redifferentiation of both plastid and mitochondrion during the process of meiosis.In review of evidences from organisms examined,it is considered unlikely that these changes are in any way a prerequisite of meiosis,but more a characteristic of cells undergoing major changes of the phase from sporophyte to gametophyte,where a cytoplasmic clear-up is required before the next stage of development may begin.

关 键 词：小孢子发生 细胞质 分化 被子植物 

分 类 号：Q949.402[生物学—植物学]