Caste-specific modulation of juvenile hormone III content and ecdysteroid titer in postembryonic development of the stingless bee,Scaptotrigona postica depilis |
| |
Authors: | Klaus Hartfelder Heinz Rembold |
| |
Institution: | (1) Zoologisches Institut, LS Entwicklungsphysiologie, Universität Tübingen, Auf der Morgenstelle 28, W-7400 Tübingen, Federal Republic of Germany;(2) Max-Planck-Institut für Biochemie, Am Klopferspitz 18a, W-8033 Martinsried, Federal Republic of Germany |
| |
Abstract: | Summary Juvenile hormone III content and ecdysteroid titer were analyzed for larval and pupal development of the stingless bee,Scaptotrigona postica depilis. Castespecific differences in juvenile hormone III content were detected at three developmental phases: at the transition from the fourth to the fifth larval stadium, in the spinning phase of the fifth larval stadium, and shortly after the imaginal moult. During the fifth larval stadium, juvenile hormone content closely reflects corpora allata activity. Juvenile hormone synthesis may thus be responsible for the elevated hormone titer in spinning-phase queen larvae, a phase of known sensitivity for induction of queen characters by exogenous juvenile hormone. For ecdysteroids, two phases of caste-specific differences were found: in the pre-pupal phase, and shortly after the imaginal moult. In both periods the titer in queens is distinctly higher compared to workers.Abbreviations
Im
imago 1 day after eclosion
-
L3, L4, L5
larval instars 3, 4, and 5
-
L5F1, L5F2
substages of feeding phase in fifth larval instar
-
L5S1, L5S2, L5S3
substages of spinning phase in fifth larval instar
-
PP1, PP2
substages of prepupal phase
-
Pw
white eyed pupa
-
Pp
pink eyed pupa
-
Pr
red eyed pupa
-
Pd
dark eyed pupa
-
Pdl, Pdm, Pdd
dark eyed pupa with progressive tanning of cuticle
-
RIA
radioimmunoassay |
| |
Keywords: | Caste differentiation Juvenile hormone III content Ecdysteroid titer Stingless bee Scaptotrigona postica |
本文献已被 SpringerLink 等数据库收录! |
|