Involvement of juvenile hormone in the induction of antifreeze protein production by the fat body of larvae of the beetleDendroides canadensis

✍ Scribed by Xu, Lei ;Duman, John G.

• Publisher: John Wiley and Sons
• Year: 1991
• Tongue: English
• Weight: 592 KB
• Volume: 258
• Category: Article
• ISSN: 0022-104X
• DOI: 10.1002/jez.1402580303

✦ Synopsis

Larvae of the Pyrochroid beetle Dendroides canadensis produce hemolymph antifreeze proteins (AFPs) as an adaptation to subzero overwintering temperatures. The AFPs are produced in early autumn in response to various environmental cues (short photoperiod, low temperature, short thermoperiod). The study presented here reinforces and extends the initial finding (Horwath and Duman, '83b) that juvenile hormone is involved in stimulating production of AFPs. Dose response curves showed seasonal variation in the sensitivity of the larvae to topical application of Juvenile Hormone (JH), with late summer larvae being more sensitive than early summer ones. The time response curve for induction of AFP activity in late summer larvae demonstrated that -14 days are required after J H treatment for the appearance of a significant increase in AFP