Olfactory Systems in Insects: Morphology and Function of antennal sensilla 闫喜中
Olfactory Systems in Insects: Morphology and Function of antennal sensilla 闫喜中
Olfaction plays a key role in guiding the behavior of most animal species Compared with our knowledge on sensory processing in other sensory systems such as visual and auditory systems,however, olfactory coding and perception is far from being understood
▪ Olfaction plays a key role in guiding the behavior of most animal species. ▪ Compared with our knowledge on sensory processing in other sensory systems such as visual and auditory systems, however, olfactory coding and perception is far from being understood
Insects depend widely on olfactory sense to find food sources,mates,and suitable oviposition sites. Their main olfactory organs are paired antennae Olfactory receptor neurons (ORNs)housed in antennal sensilla detect environmental volatiles,convert external chemical signals into electrical information,and transmit them to the insect'brain
▪ Insects depend widely on olfactory sense to find food sources, mates, and suitable oviposition sites. ▪ Their main olfactory organs are paired antennae ▪ Olfactory receptor neurons (ORNs) housed in antennal sensilla detect environmental volatiles, convert external chemical signals into electrical information, and transmit them to the insect’ brain
General Morphology of the Antenna The antennae have three segments:scape, pedicel,and flagellum S 孕分食66 Coleoptera:Curculionidae anterior view dorsal posterior scape pedicel proximal distal meriston anterior ventral cockroach 5. 10 15202530 flagellum
General Morphology of the Antenna The antennae have three segments: scape, pedicel, and flagellum Coleoptera: Curculionidae cockroach
Table 1.Length,width,and number of segments (Mean SEM)in the antennal flagellum of Z.dixolophella Sex Antennae length(mm) Number of segments Segment length(μm)） Segment width (um) Male (n =32) 7.18±0.04a(6.71-7.57)a 60.87±0.37a(58-65 99.99±0.74a(83.33-116.66) 111.97±1.53a(100-133) Female (n 32) 7.30±0.07a(6.42-8.00 63.62±0.42h(59-68》 89.58±2.56(66.66-100.00) 110.93±1.42a(100.00-116.66) Range in parentheses. Values comparing sexes within the same row followed by the same letter are not significantly different (paired samples t-test,P=0.05). Lepidoptera:Pyralidae Table 1.General characteristies (mean SEM)of the antenna of T.batesi Sex Antennae length No.of Subsegment Subsegment (mm) subsegments length(μm) width(μm) Male 5.38±0.05a 36.25±0.21a 109.52±2.7a 11417±4.2a Female 5.74±0.05l 35.87±0.16a 117.38±2.5b 106.53±3.7a Values comparing sexes within the same row followed by the same letter are not significantly different (P=0.05;t-test).N=32 antennae in each sex. Lepidoptera:Tortricidae
Lepidoptera: Tortricidae Lepidoptera: Pyralidae