Biology Reference
In-Depth Information
JH
Forager
Vg
JH
Vg
Nurse bee
Figure 7.1.
In the double-repressor model, vitellogenin (Vg) and juvenile
hormone (JH) are linked in a feedback system with a mutual ability to suppress
each other. h e nurse bee state (let ) is governed by elevated vitellogenin titers
that suppress JH and foraging behavior. Foraging is initiated by a worker when
inhibition by vitellogenin is lost and JH levels increase, causing an additional
reduction of vitellogenin levels via the regulatory feedback loop (right).
Reprinted from
Hormones, Brain and Behavior,
2nd edition, Vol. 2. Amdam GV,
Ihle DE, Page RE, “Regulation of Honeybee Worker (
Apis mellifera
) Life
Histories by Vitellogenin,” in: Donald W. Pfaf , Arthur P. Arnold, Anne M.
Etgen, Susan E. Fahrbach and Robert T. Rubin, editors. San Diego: Academic
Press, 1003-1025, Fig. 4 (2009), with permission from Elsevier.
be the key to understanding the phenotypic and genetic architectures
of pollen hoarding. h e age of onset of foraging is a key component of
the architecture (Figure 5.14), and she was able to link it to reproductive
physiology through vitellogenin. It was in the shower that I remem-
bered my Entomology 102 Insect Physiology course, where my profes-
sor, Charles Judson, taught us about the gonotropic cycle of mosquitoes.
Mosquito females change their sensitivity to stimuli and their behavior
