Patterned Rhodopsin Expression in R7 Photoreceptors of Mosquito Retina: Implications for Species-Specific Behavior
Patterned Rhodopsin Expression in R7 Photoreceptors of Mosquito Retina: Implications for Species-Specific Behavior
复制标题
DOI：
10.1002/cne.22114
复制
发表时间：
2009-10-01
影响因子：
2.5
通讯作者：
O'Tousa, Joseph E.
中科院分区：
文献类型：
--
作者：
Hu, Xiaobang;England, James H.;O'Tousa, Joseph E.
环境的视觉感知在许多蚊子行为中起着重要作用。对蚊子视觉的细胞和分子组成的表征将为理解这些行为提供基础。埃及伊蚊和冈比亚按蚊的R7光感受器的一个独特特征是它们的横纹肌膜的极端顶端突起。我们在这里表明，复眼的蚊子被划分为特定的区域的基础上，在这些R7细胞的特定视紫红质的非重叠表达。两种蚊子的上背部区域的R7细胞表达长波长的op 2视紫红质家族成员。两种蚊子的下背半球和上腹半球表达紫外线敏感的op 8视紫红质。在该第二区域的下边界处，R7细胞再次表达op 2家族视紫红质。在Ae。埃及人，该第三区域是一至三排小眼的水平条纹，并且OP 8在下腹侧半球的第四区域中表达。然而，在安。冈比亚OP 2家族成员的表达在腹侧半球的整个下部区域扩展。整体保守的小眼组织和R7视网膜图案显示这两个物种保留了相似的视觉能力。然而，腹侧区域内的差异可能促进物种特异性的视觉行为。神经学比较杂志516：334-342，2009. (C)2009 Wiley-Liss，Inc.
Visual perception of the environment plays an important role in many mosquito behaviors. Characterization of the cellular and molecular components of mosquito vision will provide a basis for understanding these behaviors. A unique feature of the R7 photoreceptors in Aedes aegypti and Anopheles gambiae is the extreme apical projection of their rhabdomeric membrane. We show here that the compound eye of both mosquitoes is divided into specific regions based on nonoverlapping expression of specific rhodopsins in these R7 cells. The R7 cells of the upper dorsal region of both mosquitoes express a long wavelength op2 rhodopsin family member. The lower dorsal hemisphere and upper ventral hemisphere of both mosquitoes express the UV-sensitive op8 rhodopsin. At the lower boundary of this second region, the R7 cells again express the op2 family rhodopsin. In Ae. aegypti, this third region is a horizontal stripe of one to three rows of ommatidia, and op8 is expressed in a fourth region in the lower ventral hemisphere. However, in An. gambiae the op2 family member expression is expanded throughout the lower region in the ventral hemisphere. The overall conserved ommatidial organization and R7 retinal patterning show these two species retain similar visual capabilities. However, the differences within the ventral domain may facilitate species-specific visual behaviors. J. Comp. Neurol. 516:334-342, 2009. (C) 2009 Wiley-Liss, Inc.