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| 小地老虎成虫复眼外部形态和内部超微结构观察 |
| Observation on the external morphology and ultrastructure of compound eye of adult Agrotis ipsilon (Lepidoptera: Noctuidae) |
| 投稿时间：2024-09-18 修订日期：2024-11-06 |
| DOI： |
| 中文关键词: 小地老虎 复眼 外部形态 超微结构 重叠像眼 |
| 英文关键词:Agrotis ipsilon compound eye external form ultrastructure superposition eye |
| 基金项目:山西省现代农业产业技术体系建设专项资金资助(2023CYJSTX01-18) |
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| 中文摘要: |
| 小地老虎是分布广泛的迁飞性害虫,严重危害玉米等多种重要农作物。分析其复眼结构特征可了解小地老虎复杂的视觉行为与感光、趋光机制的关系。本研究运用光学显微镜以及扫描电镜和透射电镜技术观察了小地老虎成虫复眼的外部形态和内部超微结构。结果显示：小地老虎成虫复眼着生于头部触角基部,呈椭圆形,属对称性复眼。雌、雄成虫复眼分别约有4 679和4 398个小眼。小眼呈正六边形,表面密被角膜乳突,间隙偶有感觉毛。每个小眼由1个角膜、4个晶锥细胞、1对初级色素细胞,6个次级色素细胞、8个视网膜细胞和基膜等组成。小地老虎复眼为典型的重叠像眼,感杆束分布为“7+1”模式；雌、雄成虫小眼排列方式及内部结构无明显差异,但雌、雄虫复眼面积和小眼数量具有明显的性二型现象。该研究为利用趋光性监测和防治小地老虎提供了理论基础。 |
| 英文摘要: |
| Agrotis ipsilon is a widely distributed migratory pest, which causes damage to maize and other crops. By analyzing the structural characteristics of the compound eye, we can understand the relationship between the complex visual behavior and the mechanism of photosensitivity and phototaxis of A.ipsilon. Optical microscopy, scanning electron microscopy and transmission electron microscopy were used to observe the external morphology and internal ultrastructure of the compound eyes of A.ipsilon moth. The results showed that the compound eyes of A.ipsilon adults were symmetrical compound eyes, born at the base of head antennae, and ellipsoidal in shape. The compound eyes of females and males approximately had 4 679 and 4 398 ommatidia, respectively. The ommatidium was hexagonal, its surface was densely covered with corneal nipples, and there were occasional interfacetal hairs in the gap. Each ommatidium was composed of one cornea, four crystalline cone cells, one pair of primary pigment cells, six secondary pigment cells, eight retinal cells, and a basement membrane. The adult compound eyes of A.ipsilon were typical superposition eyes, The distribution pattern of rhabdom followed the “7+1”. There were no obvious differences in the arrangement and internal structure of ommatidia between the female and male adults, but compound eye area and the number of ommatidia in females and males presented obvious sex dimorphism. This study provided a theoretical basis for the monitoring and control of A.ipsilon using phototaxis. |
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