Studies on microspore development in liliaceous plants
Studies on microspore development in liliaceous plants
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百合科植物小孢子发育的研究
DOI：
10.1007/bf02506252
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发表时间：
1979
期刊：
影响因子：
--
通讯作者：
Michio Ito
中科院分区：
文献类型：
--
作者：
I. Tanaka;T. Taguchi;Michio Ito
在被子植物的小孢子中，从减数分裂结束到第一次细胞分裂可视为一个细胞周期，分裂是极化的，导致两个功能不同的核的形成。在长花百合中，对细胞周期的持续时间进行了较为详细的测量。根据花蕾长度与发育阶段的相关性进行个体阶段的识别。结果表明，该过程从芽长24 mm开始，约15天后完成，芽长58 mm。通过~3H-胸腺嘧啶核苷存在下培养的细胞放射自显影，估计G1、S和G2+M期的大致持续时间分别为12天、2天和1天。对不同小孢子阶段之间的转换进行了详细的细胞学分析，揭示了一些方便的参数，这些参数表明了小孢子在不同阶段之间的变化过程。
In microspores of angiosperm plants, the period from the end of meiosis in microsporocytes unitl the first cell division may be considered as one cell cycle, and the division is polarized, resulting in the formation of two functionally different nuclei. InLilium longiflorum, the duration of the cell cycle was measured in some detail. Identification of individual stages was based on the correlation between bud length and developmental stage. The results showed that the process begins at a bud length of 24 mm and is completed about 15 days later, at a bud length of 58 mm. By autoradiography of cells cultured in the presence of3H-thymidine, approximate durations of the G1, S, and G2 plus M phases were estimated to be about 12, 2, and 1 days, respectively. A detailed cytological analysis of the transitions between the various microspore stages has revealed some convenient parameters which point to ghe progression of change during the interval.