Evidence for both humoral and neural regulation of sex pheromone biosynthesis in Spodoptera littoralis

✍ Scribed by M.-Pilar Marco; Gemma Fabriàs; Germán Lázaro; Francisco Camps

• Publisher: John Wiley and Sons
• Year: 1996
• Tongue: English
• Weight: 697 KB
• Volume: 31
• Category: Article
• ISSN: 0739-4462
• DOI: 10.1002/(sici)1520-6327(1996)31:2<157::aid-arch4>3.0.co;2-x

✦ Synopsis

Selected tissues presumably involved in the control of sex pheromone production were analyzed by ELISA for the presence of PBAN-like immunoreactivity (PBAN-IR) in Spodoptera littoralis. The temporal distribution pattern of PBAN-IR in the hemolymph is similar to that of pheromone production in the gland.

O n the other hand, analysis of the retrocerebral complex, brain-subesophageal ganglion complex, and terminal abdominal ganglion (TAG) revealed similar PBAN-IR levels in both photophase and scotophase periods. Pheromonotropic activity exhibited by both hemolymph and TAG, as determined by a modified in vitro bioassay, agrees with the results of the immunochemical analyses. Severing the ventral nerve cord anterior to the TAG impaired normal sex pheromone production by second-scotophase females. These results are discussed in the context of how sex pheromone biosynthesis is regulated by PBAN in 5.

/irtOra/iS. 0 1996 Wiley-Liss, Inr.