TISSUE DYNAMICS OF STEADY GROWTH IN HYDRA LITTORALIS .2. PATTERNS OF TISSUE MOVEMENT
TISSUE DYNAMICS OF STEADY GROWTH IN HYDRA LITTORALIS .2. PATTERNS OF TISSUE MOVEMENT
复制标题
DOI：
10.1002/jmor.1051210103
复制
发表时间：
1967-01-01
影响因子：
1.5
通讯作者：
CAMPBELL, RD
中科院分区：
文献类型：
--
作者：
CAMPBELL, RD
在水螅的圆柱中，组织不断地从位于触手螺旋下方的区域移开。在这个触手下区域之上，组织进入下囊和触手;在它之下，组织进入芽或继续沿着茎。这些运动代表了组织更新的稳态模式，其中柱生长通过身体四肢的组织损失来平衡。但是，触手下区的存在，其中组织似乎是静止的，并不一定表明生长仅限于该区域，正如通常所说的那样。水螅的体柱可以被看作是一个膨胀的圆柱体，其伸长通过两端的组织损失来平衡。在这样一个物体中，无论生长是如何沿沿着分布的，都必须有一个区域，组织似乎是从该区域发出的。只有组织移动的速率才是潜在生长模式的特征。在水螅，测量的胃柱下的组织运动速率与有丝分裂像的分布一致，这表明生长是沿着沿着胃柱展开的。
In the column of hydra, tissues continually move away from a region located just under the whorl of tentacles. Above this subtentacular region, tissues proceed into the hypostome and tentacles; below it tissues pass into the buds or continue down the stalk. These movements represent a steady state pattern of tissue renewal in which column growth is balanced by tissue loss at the body extremities. But the existence of a subtentacular zone in which tissue appears stationary does not necessarily indicate that growth is restricted to this region, as is commonly stated. The body column of hydra can be viewed as an expanding cylinder whose elongation is balanced by tissue loss at the two ends. In such a body there must be one region from which tissue appears to emanate, regardless of how growth is distributed along the cylinder. Only the rates at which tissues move will be characteristic of the underlying growth pattern. In Hydra littoralis, the measured rates of tissue movement down the gastric column are consistent with the distributions of mitotic figures, which indicate that growth is spread out along the column.