FINE-STRUCTURE OF A DEVELOPING INSECT OLFACTORY ORGAN - MORPHOGENESIS OF THE SILKMOTH ANTENNA
FINE-STRUCTURE OF A DEVELOPING INSECT OLFACTORY ORGAN - MORPHOGENESIS OF THE SILKMOTH ANTENNA
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DOI：
10.1002/jemt.1070220405
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发表时间：
1992-09-01
影响因子：
2.5
通讯作者：
KEIL, TA
中科院分区：
文献类型：
--
作者：
KEIL, TA
蚕蛾的嗅觉器官是有羽毛的触角，它在雄性体内承载着大约7万个嗅觉感受器。它在3周内从叶状的表皮囊通过节段性的一次和二次凹陷发育而成，从外围向中心线延伸。在解离后的第一天，触角表皮分化成分段排列的、交替的感觉区和非感觉区。在溶解后的头2天内，嗅觉感受器的原始细胞从感觉性表皮中高电子密度的母细胞中长出。发育中的感受器轴突在第二天开始形成初级神经支配模式。感受器大约在最初的10天内发育到最终形状，而凹陷在同一时间内完成。这些凹痕很可能是由表皮细胞的长基底部延伸所驱动的，即表皮足部。一次压痕沿着分段排列的管束的路线形成，形成天线的节段。二次压痕遵循通过该过程重建的一次节段性神经的进程。在剩余的发育过程中，触角的角质层和感觉毛由表皮和毛发形成细胞分泌。
The olfactory organ of the silkmoth Antheraea polyphemus is the feathered antenna which carries about 70,000 olfactory sensilla in the male. It develops within 3 weeks from a leaf-shaped epidermal sac by means of segmental primary and secondary indentations which proceed from the periphery towards the centerline. During the first day post-apolysis, the antennal epidermis differentiates into segmentally arranged, alternating sensillogenic and non-sensillogenic regions. Within the first 2 days post-apolysis, the anlagen of olfactory sensilla arise from electron-dense mother cells in the sensillogenic epidermis. The axons of the developing sensilla begin to form the primary innervation pattern during the second day. The sensilla develop approximately within the first 10 days to their final shape, while the indentations are completed during the same period of time. The indentations are most probably driven by long basal extensions of epidermal cells, the epidermal feet. Primary indentations follow the course of segmentally arranged tracheal bundles and form the segments of the antenna. The secondary indentations follow the course of the primary segmental nerves which are reconstructed by this process. During the remaining time of development, the cuticle of the antenna and the sensory hairs is secreted by the epidermal and the hair-forming cells.