EARLY FLOWER DEVELOPMENT IN ARABIDOPSIS
EARLY FLOWER DEVELOPMENT IN ARABIDOPSIS
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DOI：
10.1105/tpc.2.8.755
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发表时间：
1990-08-01
期刊：
影响因子：
11.6
通讯作者：
MEYEROWITZ, EM
中科院分区：
文献类型：
--
作者：
SMYTH, DR;BOWMAN, JL;MEYEROWITZ, EM
描述了拟南芥（Arabidopsis thaliana）花的早期发育，从起始到花蕾开放。用扫描电镜详细记录了花器官的形态发生、生长速率和表面结构。花的发展被分为12个阶段，使用一系列的标志性事件。第1阶段开始于顶端分生组织侧面的花扶壁的形成。第二阶段开始于花原基与分生组织分离。然后萼片原基出现（阶段3）并生长覆盖原基（阶段4）。花瓣和雄蕊原基随后出现（阶段5），并很快被萼片包围（阶段6）。在第6阶段，花瓣原基生长缓慢，而雄蕊原基则迅速扩大。第7阶段开始时，内侧雄蕊成为柄。这些很快发展的子房室（阶段8）。一个长的阶段9，然后开始与花瓣原基成为柄。在这个阶段，所有的器官都迅速地变长。 这包括雌蕊群，雌蕊群在第6阶段开始生长为开口管。当花瓣达到侧雄蕊的长度时，阶段10开始。柱头乳突出现后不久（阶段11），花瓣迅速达到内侧雄蕊的高度（阶段12）。当1毫米长的花蕾开放时，这个最后阶段结束。在我们的生长条件下，平均每天有1.9个芽发生，从发生到开放的12个阶段需要13.25天。
The early development of the flower of Arabidopsis thaliana is described from initiation until the opening of the bud. The morphogenesis, growth rate, and surface structure of floral organs were recorded in detail using scanning electron microscopy. Flower development has been divided into 12 stages using a series of landmark events. Stage 1 begins with the initiation of a floral buttress on the flank of the apical meristem. Stage 2 commences when the flower primordium becomes separate from the meristem. Sepal primordia then arise (stage 3) and grow to overlie the primordium (stage 4). Petal and stamen primordia appear next (stage 5) and are soon enclosed by the sepals (stage 6). During stage 6, petal primordia grow slowly, whereas stamen primordia enlarge more rapidly. Stage 7 begins when the medial stamens become stalked. These soon develop locules (stage 8). A long stage 9 then commences with the petal primordia becoming stalked. During this stage all organs lengthen rapidly. This includes the gynoecium, which commences growth as an open-ended tube during stage 6. When the petals reach the length of the lateral stamens, stage 10 begins. Stigmatic papillae appear soon after (stage 11), and the petals rapidly reach the height of the medial stamens (stage 12). This final stage ends when the 1-millimeter-long bud opens. Under our growing conditions 1.9 buds were initiated per day on average, and they took 13.25 days to progress through the 12 stages from initiation until opening.