FORMATION AND PROPAGATION OF CELL DIVISION-CENTERS IN EPIDERMAL LAYER OF INTERNODAL SEGMENTS OF TORENIA-FOURNIERI GROWN INVITRO - SIMULTANEOUS SURFACE OBSERVATIONS OF ALL EPIDERMAL-CELLS
FORMATION AND PROPAGATION OF CELL DIVISION-CENTERS IN EPIDERMAL LAYER OF INTERNODAL SEGMENTS OF TORENIA-FOURNIERI GROWN INVITRO - SIMULTANEOUS SURFACE OBSERVATIONS OF ALL EPIDERMAL-CELLS
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DOI：
10.1139/b74-109
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发表时间：
1974-01-01
期刊：
影响因子：
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通讯作者：
CHLYAH, H
中科院分区：
文献类型：
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作者：
CHLYAH, H
用直接观察法，从四季香节间节间切段一侧切取不同发育阶段的整个表皮条，对芽的再生进行细胞学研究。结果表明，细胞分裂开始于表皮上的任意点，并逐渐地、明显地以传染的方式扩散，形成细胞分裂中心。这些中心每个都由一个中心的高度分裂的细胞组成，周围环绕着几个较少分裂的细胞。每个原始细胞的分裂数随着距离中央细胞高度分化的距离而减少。芽分生组织的可能起源可能是原始细胞的一部分、一个细胞、相邻细胞的几个部分或几个完整的相邻细胞。细胞分裂中心之间存在竞争现象；少数中心形成分生组织原基，最后形成芽的只有少数(约20个)。因此，在含有约5,000-6,000个细胞的10 × 2.5 mm的表皮条上，在形态上观察到的与芽的形成有关的细胞不到100个。
A cytological study of bud neoformation was done using a technique of direct observation of whole epidermal strips excised and stained at different stages of development from one side of an internodal segment ofTorenia fournierigrown in vitro. It was shown that cell divisions start at random points over the epidermis and spread out progressively and apparently by contagion, forming cell division-centers. These centers are each formed of a central, highly divided cell surrounded by several less divided cells. The number of divisions per original cell decreases with the distance from the highly divided central cell.The probable origin of bud meristems was shown to be either one part of an original cell, one cell, several parts of adjacent cells, or several entire adjacent cells.A competition phenomenon was shown to exist between cell division-centers; few centers form meristematic primordia and only a few of these last form buds (about 20). Thus, on an epidermal strip 10 × 2.5 mm containing about 5000–6000 cells, fewer than 100 cells are implicated in the formation of buds observed morphologically.