Juvenile hormone production, juvenile hormone esterase, and juvenile hormone acid methyltransferase in corpora allata ofManduca sexta

1984 ◽  
Vol 230 (2) ◽  
pp. 309-313 ◽  
Author(s):  
Steven P. Sparagana ◽  
Govindan Bhaskaran ◽  
Karl H. Dahm ◽  
Vicki Riddle
Keyword(s):  
Juvenile Hormone ◽  
Corpora Allata ◽  
Hormone Production ◽  
Juvenile Hormone Esterase

Juvenile hormone esterase activity fromManduca sexta corpora allata in vitro

1989 ◽  
Vol 11 (2) ◽  
pp. 93-108 ◽  
Author(s):  
Thomas C. Sparks ◽  
L. Gregory Allen ◽  
Frank Schneider ◽  
Noelle A. Granger
Keyword(s):  
Juvenile Hormone ◽  
Esterase Activity ◽  
Corpora Allata ◽  
Juvenile Hormone Esterase

scholarly journals The effect of ovary implants on juvenile hormone production by corpora allata of male Diploptera punctata

2003 ◽  
Vol 3 (30) ◽  
pp. 1-6 ◽  
Author(s):  
J. K. Hass ◽  
K. A. Cassias ◽  
A. P. Woodhead ◽  
B. Stay
Keyword(s):  
Juvenile Hormone ◽  
Corpora Allata ◽  
Hormone Production ◽  
Diploptera Punctata

scholarly journals SEX DETERMINATION IN BEES. IV. GENETIC CONTROL OF JUVENILE HORMONE PRODUCTION IN MELIPONA QUADRIFASCIATA (APIDAE)

Genetics ◽  
1975 ◽  
Vol 81 (4) ◽  
pp. 749-756
Author(s):  
Warwick Estevam Kerr ◽  
Yukio Akahira ◽  
Conceição A Camargo
Keyword(s):  
Juvenile Hormone ◽  
High Volume ◽  
Cell Number ◽  
Corpus Allatum ◽  
Corpora Allata ◽  
Caste Determination ◽  
Prepupal Stage ◽  
Hormone Production ◽  
Melipona Quadrifasciata ◽  
Phases Of Development

ABSTRACT Cell number and volume of corpora allata was determined for 8 phases of development, the first prepupal stage to adults 30 days old, in the social Apidae Melipona quadrifasciata. In the second prepupal stage a strong correlation was found between cell number and body weight (r=0.651**), and cell number and corpora allata volume in prepupal stage (r=0.535*), which indicates that juvenile hormone has a definite role in caste determination in Melipona. The distribution of the volume of corpus allatum suggest a 3:1 segregation between bees with high volume of corpora allata against low and medium volume. This implies that genes xa and xb code for an enzyme that directly participates in juvenile hormone production. It was also concluded that the number of cells in the second prepupal stage is more important than the weight of the prepupa for caste determination. A scheme summarizing the genic control of sex and caste determination in Melipona bees in the prepupal phase is given.

Evidence against the hypothesis that metacestodes of Hymenolepis diminuta inhibit corpora allata functioning in the intermediate host, Tenebrio molitor

Parasitology ◽  
1987 ◽  
Vol 95 (1) ◽  
pp. 93-96 ◽  
Author(s):  
Hilary Hurd ◽  
R. J. Weaver
Keyword(s):  
Juvenile Hormone ◽  
Intermediate Host ◽  
Endocrine System ◽  
Tenebrio Molitor ◽  
Hymenolepis Diminuta ◽  
Corpora Allata ◽  
Hormone Production ◽  
Control Female ◽  
And Control

SUMMARYSeveral of the pathophysiological responses made by the beetle Tenebrio molitor, when infected with metacestodes of Hymenolepis diminuta, may be attributed to a parasite-induced reduction in host juvenile hormone titre. It has been suggested that production of this hormone by the corpora allata may be inhibited in parasitized insects. This hypothesis was tested using an in vitro radiochemical assay to compare the biosynthesis of juvenile hormone by single pairs of corpora allata taken from mated 12- and 15-day-old infected and control female insects. The results demonstrate, however, that there was no difference in hormone production associated with metacestode infection. Other possible mechanisms for parasite interference in this host endocrine system are discussed.

scholarly journals Isolation and Sequencing of cDNA Clones Coding for Juvenile Hormone Esterase from Heliothis virescens

1989 ◽  
Vol 264 (21) ◽  
pp. 12419-12425 ◽  
Author(s):  
T N Hanzlik ◽  
Y A I Abdel-Aal ◽  
L G Harshman ◽  
B D Hammock
Keyword(s):  
Juvenile Hormone ◽  
Heliothis Virescens ◽  
Cdna Clones ◽  
Juvenile Hormone Esterase
Sign in / Sign up

Export Citation Format

Share Document