scholarly journals Precocene-I inhibits juvenile hormone biosynthesis, ovarian activation, aggression and alters sterility signal production in bumble bee (Bombus terrestris) workers

2014 ◽  
Vol 217 (17) ◽  
pp. 3178-3185 ◽  
Author(s):  
E. Amsalem ◽  
P. Teal ◽  
C. M. Grozinger ◽  
A. Hefetz
Keyword(s):  
Juvenile Hormone ◽  
Bombus Terrestris ◽  
Bumble Bee ◽  
Juvenile Hormone Biosynthesis ◽  
Ovarian Activation ◽  
Signal Production ◽  
Hormone Biosynthesis

Juvenile hormone titers, juvenile hormone biosynthesis, ovarian development and social environment in Bombus terrestris

2000 ◽  
Vol 46 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Guy Bloch ◽  
David W. Borst ◽  
Zhi-Yong Huang ◽  
Gene E. Robinson ◽  
Jonathan Cnaani ◽  
...  
Keyword(s):  
Juvenile Hormone ◽  
Social Environment ◽  
Ovarian Development ◽  
Bombus Terrestris ◽  
Juvenile Hormone Biosynthesis ◽  
Hormone Biosynthesis

scholarly journals ML-236B (Compactin) as an Inhibitor of Juvenile Hormone Biosynthesis

1983 ◽  
Vol 18 (1) ◽  
pp. 111-115 ◽  
Author(s):  
Kiyoshi HIRUMA ◽  
Shigemi YAGI ◽  
Akira ENDO
Keyword(s):  
Juvenile Hormone ◽  
Juvenile Hormone Biosynthesis ◽  
Hormone Biosynthesis

On the Specificity of Juvenile Hormone Biosynthesis in the Male Cecropia Moth

1981 ◽  
Vol 36 (7-8) ◽  
pp. 579-585 ◽  
Author(s):  
Martin G. Peter ◽  
Paul D. Shirk ◽  
Karl H. Dahm ◽  
Herbert Roller
Keyword(s):  
Juvenile Hormone ◽  
Enzyme System ◽  
Reaction Rates ◽  
Corpora Allata ◽  
Low Molecular Weight ◽  
Methyltransferase Activity ◽  
Accessory Sex Glands ◽  
Juvenile Hormone Biosynthesis ◽  
Hormone Biosynthesis ◽  
Natural Enantiomer

Abstract The accessory sex glands (ASG) of adult male Cecropia contain an enzyme that methylates juvenile hormone acids (JH-acids) in the presence of S-adenosyl-L-methionine (SAM). The methyltransferase is highly specific. The reaction rates decrease in the order JH-I-acid, JH-II-acid and JH-III-acid; in each case the natural enantiomer is esterified predominantly. Methyltrans­ ferase activity with the same substrate specificity was also demonstrated in adult female corpora allata (CA). Male CA have only marginal methyltransferase activity. The CA of male H. cecropia contain substantial amounts of JH-I-acid and JH-II-acid (minimum: 5 pmol/pair). When kept in organ culture, they release JH-acids into the medium. Radiolabeled propionate and mevalonate are incorporated efficiently into the carbon skeletons of the JH-acids. The enzyme system performing these transformations cannot be forced to produce JH-III-acid even in the presence of high mevalonate concentrations, though homomevalonate may enhance biosynthesis of JH-I-acid and JH-II-acid more than tenfold. It becomes evident that the regulation of JH titer balances with regard to the homologous structures during insect development is not merely a question of the availability of low molecular weight precursors, but in addition that of highly specific enzymes acting as regulatory entities in the later steps of the biosynthetic sequence.

scholarly journals A Family of Neuropeptides That Inhibit Juvenile Hormone Biosynthesis in the Cricket,Gryllus bimaculatus

1995 ◽  
Vol 270 (36) ◽  
pp. 21103-21108 ◽  
Author(s):  
Matthias W. Lorenz ◽  
Roland Kellner ◽  
Klaus H. Hoffmann
Keyword(s):  
Juvenile Hormone ◽  
Gryllus Bimaculatus ◽  
Juvenile Hormone Biosynthesis ◽  
Hormone Biosynthesis
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