During the meiosis of microspore mother cells(MMC),the most cells display abnormal chromosomes:some chromosomes moved out of the spindle of the cell at metaphase;some chromosome bridges and.
在小孢子母细胞减数分裂过程中,染色体的异常行为多表现为:中期出现单个染色体游离在纺锤体外面、在后期出现的染色体桥和落后染色体、在末期出现的单个染色体游离在细胞核外形成微核的现象。
In the primary stage microspore mother cell formed with arranging in two rows of cells.
以辣椒细胞质雄性不育系的同型保持系95-1B为材料进行小孢子母细胞减数分裂的研究,切片观察的结果表明,小孢子母细胞减数分裂的过程发生在花蕾初现、花萼紧闭、花瓣尚未开始张开时,在小孢子母细胞形成初期,小孢子母细胞呈双列式排列,花药壁由一层表皮、一层内壁、2~3层中层、一层绒毡层组成。
Primary sporogenous celle wasformed in the late August (1992);microspore mother cells (MMC) were formed in theearly Novemberl next year (1993),in the middle of February tetrad was formed;microspores were released from tetrad in the late February;mature pollen grain was formedand began shedding in the middle of March;pollen grain germinated in the early April;generative cell divid.
）Franco]初生造孢细胞在8月下旬（1992年）形成，11月上旬形成小孢子母细胞，1993年2月中旬形成四分体，2月下旬小孢子从四分体内释放出来，3月中旬形成成熟花粉粒并开始传粉，4月上旬花粉粒在珠心上萌发，5月上旬生殖细胞分裂，6月上旬精原细胞分裂。
The meiotic behavior of three species of the genus Picea was investigated using pollen mother cells(PMCs).
对小孢子母细胞(PMCs)减数分裂的全程观察和统计分析表明,跟裸子植物其他类群相比,3种云杉植物在减数分裂过程中染色体的行为高度保守。
Observations on abnormal meiosis of pollen mother cells in Lilium davidii var.unicolor;
兰州百合小孢子母细胞减数分裂异常现象的观察
davidiana approximately experience 6 months from pollen mother cell to mature pollen grain and survive in winter in the form of pollen mother cell.
结果显示:(1)虎榛子从小孢子母细胞到雄配子体形成约经历6个月,其间以小孢子母细胞的形式越冬,次年4月中旬花药成熟,花粉粒散粉。
was studied through the observation of meiosis and the microspore development of its pollen mother cells(PMCs).
统计各种异常现象出现的频率并分析了这些异常现象形成的可能机制及对正常小孢子形成的影响,推测染色体间的丝状粘连可能是木立芦荟小孢子母细胞减数分裂异常并导致败育花粉产生的主要因素。
Change of callose wall synthesis during formation and development of microsporocytes in Secale cereale;
黑麦小孢子母细胞形成和发育过程中细胞胼胝质壁合成的变化
In the restorer line, Ce64, the developing microsporocytes have dense cytoplasm and a distinct set of circumferential microtubules around the nucleus.
)雄性不育系珍汕 97A、保持系珍汕 97B和恢复系测 6 4三系小孢子发生过程的研究表明 :恢复系测 6 4小孢子母细胞细胞质浓 ,有明显的微管荧光围绕着细胞核。
From packytene to telophase Ⅱ, there are cytoplasmic channels between nei bouring microsporocytes so that the.
自减数分裂粗线期至末期Ⅱ，同一药室内相邻的小孢子母细胞之间存在胞质通道。
During the meiotic process of megasporocyte,the ribosome population diminished greatly in prophase I and restored in metaphase I;plastids and mitochondria turned unclear (dedifferentiation) in prophase I and recovered their normal structures (redifferentiation) in metaphase I.
发现了小麦大孢子母细胞减数分裂过程中 ,核糖体密度在前期Ⅰ显著降低 ,到中期Ⅰ才完全恢复 ;质体和线粒体也出现了脱分化和再分化。