Juvenile hormone and reproduction in the cricket. II. Effect of rearing temperature on corpus allatum activity (in vitro) in adult females

1985 ◽  
Vol 41 (6) ◽  
pp. 758-759 ◽  
Author(s):  
W. Espig ◽  
K. H. Hoffmann
Keyword(s):  
Juvenile Hormone ◽  
Corpus Allatum ◽  
Rearing Temperature ◽  
Adult Females ◽  
Corpus Allatum Activity

Conditions for estimation of corpus allatum activity in the blowfly, Phormia regina, in vitro

1988 ◽  
Vol 13 (1) ◽  
pp. 69-79 ◽  
Author(s):  
M.-A. LIU ◽  
G. L. JONES ◽  
J. G. STOFFOLANO ◽  
C.-M. YIN
Keyword(s):  
Corpus Allatum ◽  
Phormia Regina ◽  
Corpus Allatum Activity

Corpus allatum activity (In vitro) in female Culex pipiens during adult life cycle

1988 ◽  
Vol 34 (2) ◽  
pp. 131-135 ◽  
Author(s):  
Janice Readio ◽  
Kenneth Peck ◽  
Roger Meola ◽  
Karl H. Dahm
Keyword(s):  
Life Cycle ◽  
Culex Pipiens ◽  
Adult Life ◽  
Corpus Allatum ◽  
Corpus Allatum Activity

The possible role of juvenile hormone esterase in the regulation of juvenile hormone titre in the female cockroach Diploptera punctata

1983 ◽  
Vol 61 (7) ◽  
pp. 811-817 ◽  
Author(s):  
Daniela Rotin ◽  
Stephen S. Tobe
Keyword(s):  
Juvenile Hormone ◽  
Diploptera Punctata ◽  
Juvenile Hormone Esterase ◽  
Adult Females ◽  
Acetate Esterase ◽  
Triton X ◽  
Naphthyl Acetate

Juvenile hormone (JH) degradation in vitro and in vivo was studied in the viviparous cockroach Diploptera punctata. In vitro studies with juvenile hormone esterase (JHE) and "general" or 1-naphthyl acetate esterase (NAcE) revealed that diethyl-p-nitrophenylphosphate (paraoxon) inhibited both JHE and NAcE activity, but the latter was more sensitive and was completely inhibited at 0.1 mM. NAcE activity was resistant to inhibition with Triton X-100, whereas JHE activity in haemolymph of adult females was inhibited 100% at Triton X-100 concentration of 0.25%. Eighty percent inhibition of JHE activity in vivo was observed following injection of 0.2 μL Triton X-100. In contrast to the previously observed dose-dependant increase in JHE activity, NAcE activity did not increase following treatment of allatectomized females with the JH analogue ethyl-2E,4E-3,7,11-trimethyl-2,4-dodecadienoate (hydroprene). Hydroprene was not catabolized in haemolymph of D. punctata in vitro. The half-life of C16 JH (JH III) in the haemolymph, in vivo, was 1.65 h for day 5 females and 2 h for day 6 females.

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