Regulation of red fluorescent light emission in a cryptic marine fish.
Regulation of red fluorescent light emission in a cryptic marine fish.
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DOI：
10.1186/1742-9994-11-1
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发表时间：
2014-01-08
影响因子：
2.8
通讯作者：
Michiels NK
中科院分区：
文献类型：
--
作者：
Wucherer MF;Michiels NK
动物的颜色是一种权衡，既能被预期的、特定内的或特定间的接受者看到，又不能被意外的接受者看到。许多鱼类通过适应性着色来解决这个问题。在这里，我们调查这是否也适用于荧光颜料。在那些环境光以蓝光为主的水生环境中，红色荧光可以产生高对比度的信号。海洋的隐鱼雷公藤（triterygion delaisi）就生活在这样的环境中，它有明亮的红色荧光虹膜，可以快速地向上和向下调节。在这里，我们用KCl神经刺激治疗和组织学描述了这种现象的生理和细胞机制。kcl处理表明，眼睛荧光调节是通过黑素细胞内黑素体的分散和聚集来实现的。组织学显示，虹膜前部的球形荧光虹膜团被分组，每组都被一个单一的后方黑素团的手指状延伸所包裹。它们一起形成所谓的染色质单位。通过黑素小体在黑素细胞外周膜的扩散和聚集，荧光虹膜细胞被覆盖或显示在虹膜的前部（外部）。delaisi有一个完善的机制来控制其眼睛的荧光发射，这可能是有利的，因为它的隐秘的生活方式。这是首次在海洋硬骨鱼中发现控制荧光发射的染色质单位。我们期望其他荧光鱼类在虹膜或身体其他部位使用类似的机制。与先前描述的基于树突荧光色团的机制相反，色团单位通过两种色团类型之间的合作来控制荧光发射：发射型和闭塞型。第二种荧光调制机制的发现加强了我们的观点，即荧光是鱼类着色的相关和自适应成分。
Animal colouration is a trade-off between being seen by intended, intra- or inter-specific receivers while not being seen by the unintended. Many fishes solve this problem by adaptive colouration. Here, we investigate whether this also holds for fluorescent pigments. In those aquatic environments in which the ambient light is dominated by bluish light, red fluorescence can generate high-contrast signals. The marine, cryptic fish Tripterygion delaisi inhabits such environments and has a bright red-fluorescent iris that can be rapidly up- and down-regulated. Here, we described the physiological and cellular mechanism of this phenomenon using a neurostimulation treatment with KCl and histology. KCl-treatment revealed that eye fluorescence regulation is achieved through dispersal and aggregation of black-pigmented melanosomes within melanophores. Histology showed that globular, fluorescent iridophores on the anterior side of the iris are grouped and each group is encased by finger-like extensions of a single posterior melanophore. Together they form a so-called chromatophore unit. By dispersal and aggregation of melanosomes into and out of the peripheral membranous extensions of the melanophore, the fluorescent iridophores are covered or revealed on the anterior (outside) of the iris. T. delaisi possesses a well-developed mechanism to control the fluorescent emission from its eyes, which may be advantageous given its cryptic lifestyle. This is the first time chromatophore units are found to control fluorescent emission in marine teleost fishes. We expect other fluorescent fish species to use similar mechanisms in the iris or elsewhere in the body. In contrast to a previously described mechanism based on dendritic fluorescent chromatophores, chromatophore units control fluorescent emission through the cooperation between two chromatophore types: an emitting and an occluding type. The discovery of a second mechanism for fluorescence modulation strengthens our view that fluorescence is a relevant and adaptive component of fish colouration.
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DOI：
10.1098/rstb.1993.0060
发表时间：
1993-05-29
影响因子：
6.3
作者：
ENDLER, JA
通讯作者：
ENDLER, JA
影响因子：
10.7
作者：
Field, Steven F.;Matz, Mikhail V.
通讯作者：
Matz, Mikhail V.
影响因子：
0.9
作者：
Goda, M;Fujii, R
通讯作者：
Fujii, R
影响因子：
2.8
作者：
Hart, NS;Lisney, TJ;Collin, SP
通讯作者：
Collin, SP
影响因子：
56.9
作者：
CHALFIE, M;TU, Y;PRASHER, DC
通讯作者：
PRASHER, DC