Transplantations of heart and limb rudiments between Amblystoma and Triton embryos
Transplantations of heart and limb rudiments between Amblystoma and Triton embryos
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DOI：
10.1002/jez.1400650108
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发表时间：
1933-04-01
影响因子：
--
通讯作者：
Copenhaver, WM
中科院分区：
文献类型：
--
作者：
Copenhaver, WM
本文研究了胚胎间移植前肢的生长速度。mexi-canum和T.高山带绦虫与A. Harrison的虎纹草结果（'' 24）。在胚胎阶段和卵黄吸收后的几天里，移植的肢体以供体的速度生长。在后期阶段的明显加速已经通过喂养方法来解释，并且证据表明，美西螈-Triton肢体移植物的生长速率，如虎纹虎-斑点虎肢体移植物（Twitty和Schwind，“28），是移植组织中固有的。蝾螈-Triton心脏移植物没有超过供体的生长，即使宿主和供体没有保持在可比的营养水平。根据寄主的功能需求，显然有一些调节。由于再生的宿主窦，心脏具有额外的腔室。通常，移植物以宿主或再生窦性心率搏动，尽管当移植物以供体心率搏动时发生心脏传导阻滞的情况并不少见，这表明了种属节律的内在因素，如先前所述的虎舌草-斑点草心脏移植物。
Studies were made on the growth rate of forelimbs transplanted between embryos of A. mexi-canum and T. taeniatus alpestris. There was a growth acceleration beyond the donor rate in later larval stages in axolotl-Triton limb grafts similar to the A. tigrinum-punctatum results of Harrison (''24) . In embryonic stages and for several days following yolk resorption, the grafted limbs grew at the donor rate. The apparent acceleration in later stages has been explained by the feeding methods and the evidence indicates that the growth rate of axolotl-Triton limb grafts, as in tigrinum-punctatum limb grafts (Twitty and Schwind, ''28), is intrinsic in the grafted tissue. Axolotl-Triton heart grafts did not exceed the donor growth even though hosts and donors were not maintained at comparable nutrient levels. There was apparently some regulation in accordance with the functional demands of the host species. The hearts possessed an extra chamber due to a regenerated host sinus. Usually the graft pulsated at the host or regenerated sinus rate, although not infrequently heart blocks occurred when the graft pulsated at the donor rate, indicating an intrinsic factor for species rhythm as previously described for tigrinum-punctatum heart grafts.