概括
沙币Dendraster excentricus中的幼虫变形是由一个特定的酸激素触发的,称为费洛蒙. 成人沙币释放这种化学信号,诱导有能力的幼虫转变.
科学领域:
- 海洋生物学 海洋生物学
- 发展生物学 发展生物学
- 化学生态化学生态学
背景情况:
- 幼虫变形是许多海洋无脊椎动物的关键发展过渡.
- 环境暗示通常会触发变形,但特定的化学信号可能很复杂.
- 金沙美元Dendraster excentricus为研究转化诱导提供了一个模型系统.
研究的目的:
- 为了确定负责诱导Dendraster excentricus幼虫的转型的化学 عامل.
- 为了确定引发变形的信号的来源和性质.
- 阐明成年沙币在控制幼虫发育中的作用.
主要方法:
- 使用沙子,美元床沙子和水性提取物诱导转化.
- 使用凝透色谱 (GPC) 和高性能液体色谱 (HPLC) 净化活性化合物.
- 确定纯化的分子量和有效度.
主要成果:
- 从沙子提取物中分离出一个980达尔顿的,并被证明可以诱导变形.
- 在10-6和10-5M之间的度下,酸诱导了转化.
- 成人沙币及其生殖腺的提取物也诱导了变形,成年人可以调节基板.
结论:
- 在Dendraster excentricus中的转化是由成年沙币释放的特定激素启动的.
- 鉴定到的980达尔顿可能是这个过程中介导的化学信号.
- 这一发现凸显了化学通信在海洋无脊椎动物发展中的重要性.
相关概念视频
Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
The Ratio of X Chromosome to Autosomes
In most organisms, sex is determined by the ratio of X and Y chromosomes. However, in some organisms, such as Drosophila and C.elegans, sex is determined by the ratio of the number of X chromosomes to the number of sets of autosomes. The Y chromosome in Drosophila is active but does not determine sex. It contains genes responsible for the production of sperms in adult flies.
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...
Normal male Drosophila has a ratio of one X chromosome to two sets of autosomes. In contrast, normal female Drosophila...


