Comparison of the antennal sensilla and compound eye sensilla in four Drosophila (Diptera: Drosophilidae) species

  • Huanhuan Gao
  • Shouguo Lai Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 202 North Industry Road, Jinan, 250100, China
  • Yifan Zhai Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 202 North Industry Road, Jinan, 250100, China
  • Zhaoyun Lv Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 202 North Industry Road, Jinan, 250100, China
  • Li Zheng Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 202 North Industry Road, Jinan, 250100, China
  • Yi Yu Institute of Plant Protection, Shandong Academy of Agricultural Sciences, 202 North Industry Road, Jinan, 250100, China
  • Feng-Shan Ren Shandong Academy of Grape, Jinan, 250100, China

Abstract

Antennal sensilla and compound eyes of fruit flies, Drosophila melanogaster (Meigen), Drosophila suzukii (Matsumura), Drosophila immigrans (Sturtevant), and Drosophila hydei (Sturtevant) (all Diptera: Drosophilidae), were observed with stereoscopic microscopy and scanning electron microscopy. The results showed that the antenna consists of 3 segments: a proximal scape, a pedicel, and a flagellum composed of a funiculus and a dendritic arista. Six morphologically distinct types of sensilla were observed on the antenna: chaetica, microtrichia, trichoid (Tr I, Tr II), basiconic, clavate, and coeloconic (Co I, Co II). Basiconic sensilla were significantly shorter than other sensilla in the funiculus of D. melanogaster. The number of clavate sensillae was less than other sensilla in the funiculus of D. melanogaster and D. immigrans, but was greater in D. suzukii and D. hydei. Moreover, coeloconic sensilla were absent in D. suzukii and D. hydei. The length and abundance of the chaetica sensilla on the compound eyes were different significantly among the 4 species. Drosophila hydei had chaotic sensilla with the greatest length and abundance; they were lowest for D. suzukii. Based on the previous literature, the possible functions of these sensilla are discussed. We inferred that fruit flies may regulate their behaviors according to the information detected by these sensilla.

Resumen

Se observaron las sensilas antenales y los ojos compuestos de moscas de la fruta, Drosophila melanogaster (Meigen), Drosophila suzukii (Matsumura), Drosophila immigrans (Sturtevant) y Drosophila hydei (Sturtevant) (todos Diptera: Drosophilidae), con microscopía estereoscópica y microscopía electrónica de barrido (SEM). Los resultados mostraron que la antena consiste de 3 segmentos: un escapo proximal, un pedicelo, y un flagelo compuesto por un funículo y un arista dendrítica. Se observaron seis clases morfológicamente distintas de sensilas en la antena: chaetica, microtrichia, trichoid (Tr I, Tr II), basicónica, clavada, y coelocónica (Co I, Co II). Las sensillas basiconicas fueron significativamente más cortas que otras sensillas en el funículo de D. melanogaster. El número de sensilas clavadas fue menor que otras sensilas en el funículo de D. melanogaster y D. immigrans, pero fue mayor en D. suzukii y D. hydei. Por otra parte, las sensilas coelocónicas estaban ausentes en D. suzukii y D. hydei. La longitud y abundancia de las sensillas chaeticas en los ojos compuestos fueron significativamente diferentes entre las 4 especies. Drosophila hydei tenía sensillas caóticas con la mayor longitud y abundancia; fueron los más bajos para D. suzukii. Con base en la literatura anterior, se discuten las posibles funciones de estas sensilas. Deducimos que las moscas de la fruta pueden regular su comportamiento de acuerdo con la información detectada por estas sensilas.

Key Words: fruit fly; sensory perception; SEM

Authors Huanhuan Gao and Shouguo Lai contributed equally to this work

View this article in BioOne

Published
2020-02-03
Section
Research Papers