The photoreceptor localization confirms the spectral heterogeneity of ommatidia in the male small white butterfly, Pieris rapae crucivora
The photoreceptor localization confirms the spectral heterogeneity of ommatidia in the male small white butterfly, Pieris rapae crucivora
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DOI：
10.1007/s00359-002-0380-0
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发表时间：
2003-02-01
影响因子：
2.1
通讯作者：
Arikawa, K
中科院分区：
文献类型：
--
作者：
Qiu, X;Arikawa, K
十字粉蝶复眼腹侧有三种不同的小眼。小眼包含9个光感受器，其中4个（R1 - 4）构成了杆束的远端层。我们通过细胞内电生理学确定了每种小眼中R1 - 4远端光感受器的敏感性光谱，并确定了UV、蓝色、双峰蓝色、绿色和在紫色中具有降低的敏感性的绿色受体。我们在记录后通过注射染料将这些受体定位在每种类型的小眼中。在I型小眼中，R1和R2细胞是UV和蓝色受体。当R1对紫外线敏感时，R2总是对蓝色敏感，反之亦然。I型中的R3和R4都是绿色受体。在II型中，R1和R2都是双峰蓝色受体，R3和R4都是绿色受体，对紫色的敏感性降低。在III型中，R1和R2都是UV，R3和R4是绿色受体。双峰蓝色和绿色受体在第二型小眼的紫色具有降低的灵敏度，在420 nm处具有降低的灵敏度，这可能是由于第二型小眼中存在的荧光材料的过滤作用。小眼的光谱异质性似乎是昆虫复眼的一种常见设计。
The compound eye of Pieris rapae crucivora contains ventrally three types of histologically distinct ommatidia. An ommatidium contains nine photoreceptors, four of which (R1-4) construct the distal tier of the rhabdom. We determined the sensitivity spectra of the R1-4 distal photoreceptors in each type of ommatidia by intracellular electrophysiology and identified UV, blue, double-peaked blue, green, and a green receptor with depressed sensitivity in the violet. We localized these receptors in each type of ommatidia by injecting dye after the recording. In type I ommatidia the R1 and R2 cells are UV and blue receptors. When R1 is UV sensitive, R2 is always blue sensitive, or vice versa. R3 and R4 in type I are both green receptors. In type II, R1 and R2 are both double-peaked blue receptors and R3 and R4 are both green receptors with depressed sensitivity in the violet. In type III, RI and R2 are both UV, and R3 and R4 are green receptors. The double-peaked blue, and green receptors with depressed sensitivity in the violet in type II ommatidia have depressed sensitivity at 420 nm, which is probably due to the filtering effect of a fluorescing material present in the type II ommatidia. Spectral heterogeneity of ommatidia seems to be a common design of insect compound eyes.