Relationships between JH-biosynthetic Activity of the Corpora Allata in vitro, Their Size and Adult Diapause in a Stink Bug, Plautia crossota stali Scott

概要

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The sizes of terminal oocytes in females and ectadenia in males of a stink bug, Plautia corrosota stali were positively correlated with the JH-biosynthetic activity by the corpora allata (CA) in vitro. The CA size and JH-biosynthetic activity were greater in reproductively active bugs than in diapause ones. Some of the females kept under diapause-maintaining conditions for a long period, i.e. 120 days, started growing oocytes and changed body colour from brown to green. Their CA activity and CA volume varied greatly among individuals, and the variation was correlated with oocyte growth and body colour. In diapause adults, the CA activity was enhanced without conspicuous increase in CA size when the nervous connections between the brain and CA were severed. The operated bugs developed their ovaries, and their CA produced more JH in vitro than those of sham-operated or intact diapause controls. These results suggest that the JH biosynthesis by CA and the CA size are independently regulated by the central nervous system.
日本昆虫学会の論文
1999-09-25