scholarly journals Hormonal Control of the Division of Labor in Adult Honeybees (Apis mellifera L.) : I. Effect of Methoprene on Corpora Allata and Hypopharyngeal Gland, and Its α-Glucosidase Activity

1989 ◽  
Vol 24 (1) ◽  
pp. 66-77 ◽  
Author(s):  
Hiromi SASAGAWA ◽  
Masami SASAKI ◽  
Ichiji OKADA
Keyword(s):  
Apis Mellifera ◽  
Division Of Labor ◽  
Hormonal Control ◽  
Corpora Allata ◽  
Hypopharyngeal Gland ◽  
Glucosidase Activity ◽  
Alpha Glucosidase

Alpha‐glucosidase activity in the rat epididymis under different physiological conditions

1997 ◽  
Vol 20 (2) ◽  
pp. 92-95 ◽  
Author(s):  
N. R. KALLA ◽  
S. KAUR ◽  
N. UJWAL ◽  
U. MEHTA ◽  
H. JOOS ◽  
...  
Keyword(s):  
Physiological Conditions ◽  
Glucosidase Activity ◽  
Rat Epididymis ◽  
Alpha Glucosidase

scholarly journals Apitoxin harvest impairs hypopharyngeal gland structure in Apis mellifera honey bees

Apidologie ◽  
2017 ◽  
Vol 48 (6) ◽  
pp. 755-760 ◽  
Author(s):  
Thaís S. Bovi ◽  
Paula Onari ◽  
Sérgio A. A. Santos ◽  
Luis A. Justulin ◽  
Ricardo O. Orsi
Keyword(s):  
Apis Mellifera ◽  
Honey Bees ◽  
Hypopharyngeal Gland

The Hormonal Control of the Development of Hairs and Bristles in the Milkweed Bug, ONCOPELTUS FASCIATUS, DALL

1966 ◽  
Vol 44 (3) ◽  
pp. 507-522
Author(s):  
PETER A. LAWRENCE
Keyword(s):  
Juvenile Hormone ◽  
Mode Of Action ◽  
Hormonal Control ◽  
Oncopeltus Fasciatus ◽  
Corpora Allata ◽  
Moult Cycle ◽  
Dense Population ◽  
Milkweed Bug ◽  
Larval Stages ◽  
Hormonal Milieu

1. As in Rhodnius, the larval Oncopeltus has bristles which are supplemented at each moult. However, at metamorphosis a dense population of non-innervated hairs develops. 2. Implantation of corpora allata into 5th-stage larvae showed that the development of these hairs can be inhibited universally or locally by the juvenile hormone (JH). 3. Transplantations of integument between 5th-stage larvae of different stages in the moult cycle gave some information about the power of the host to synchronize the graft to its own moult cycle. 4. Transplantations between different larval stages showed that the grafted in tegument responded to the hormonal milieu of the host. 5. Adult integument was transplanted onto larvae to study the reversal of metamorphosis. It was found that the development of a supernumerary population of hairs depended on the integument passing through a moult cycle in the presence of JH. After two moults in the presence of JH, reversal of metamorphosis was found to vary over the surface of the transplant, being further advanced at the margin. At the edge of the graft properly formed larval bristles developed, while at the centre adult hairs were formed in adult cuticle. Intermediately formed bristles were found in the intervening areas. It is suggested that reactions associated with wounding are the cause of this heterogeneous result. 6. The significance of these results in relation to other work and to theories concerning the mode of action of the juvenile hormone is discussed.

Maturation of muscle properties and its hormonal control in an adult insect

2001 ◽  
Vol 204 (20) ◽  
pp. 3531-3545
Author(s):  
Uwe Rose ◽  
Michael Ferber ◽  
Reinhold Hustert
Keyword(s):  
Action Potentials ◽  
Abdominal Segment ◽  
Adult Life ◽  
Reproductive Development ◽  
Hormonal Control ◽  
Corpora Allata ◽  
Muscle Fibres ◽  
Abdominal Muscles ◽  
Muscle Properties ◽  
Cross Sectional

SUMMARY The oviposition of female locusts requires longitudinal muscles to tolerate remarkable lengthening. Whether this ability together with concomitant properties develops during maturation or is present throughout life was investigated. The properties of the locust abdominal muscles involved in oviposition behaviour were investigated with respect to their maturation, segment- and gender-specificity and regulation by juvenile hormone (JH). Muscles from the sixth abdominal segment (an oviposition segment) of mature females (>18 days old) were able to tolerate large extensions (>8 mm). At this length, muscles were still able to generate considerable neurally evoked twitch tension. In contrast, muscle fibres from females less than 5 days old did not tolerate extension of more than 4 mm. At this length, tension generation was negligible. The maximum tension generated at different stimulus frequencies was significantly higher in muscles of females more than 18 days old than in females less than 5 days old. Furthermore, the cross-sectional area of muscle fibres increased significantly during reproductive development. Current-clamp recordings from denervated muscle fibres of females more than 18 days old revealed their ability to generate overshooting action potentials. The potentials were tetrodotoxin (TTX)-insensitive (0.5 μmol l–1 TTX), but were blocked by Cd2+ (50 μmol l–1) or nifedipine (50 μmol l–1), which suggests the involvement of L-type Ca2+ channels. Action potentials recorded from females less than 5 days old differed considerably in amplitude and shape from those recorded from females more than 18 days old, suggesting their maturation during the first 2 weeks of adult life. Inactivation of the corpora allata (CA) by precocene inhibited the maturation of these muscle properties, whereas injection of JH into precocene-treated females reversed this effect. Homologous muscles from the third abdominal segment (a non-oviposition segment, M169) and muscles from males (M214) revealed no comparable changes, although some minor changes occurred during reproductive development. The results suggest a gender- and segment-specific maturation of muscle properties that is related to reproductive behaviour and controlled by JH.

scholarly journals IN VITRO EFFECT OF TERPENOIDS - RICH EXTRACT OF Momordica charantia ON ALPHA GLUCOSIDASE ACTIVITY

Revista Vitae ◽  
2018 ◽  
Vol 25 (3) ◽  
pp. 148-153 ◽  
Author(s):  
A. B. Sallau ◽  
◽  
R. N. Yakubu ◽  
S. M. Aliyu ◽  
A. Salihu ◽  
...  
Keyword(s):  
Momordica Charantia ◽  
Glucosidase Activity ◽  
Vitro Effect ◽  
Alpha Glucosidase
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