THE EFFECTS OF A JH MIMIC AND CAUTERIZATION OF THE CORPUS ALLATUM COMPLEX ON THE MALE ACCESSORY GLANDS OF <i>AEDES AEGYPTI</i> (DIPTERA: CULICIDAE)

Ramalingam, S.; Craig, George B.

doi:10.4039/ent109897-7

Cited by 19 publications

(13 citation statements)

References 15 publications

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“…The effect of methoprene on physiological maturation in honeybee males seems opposite to the effect in other insects, where JH stimulates maturation of the accessory gland (Wigglesworth 1936;Loher 1961; Blaine and Dixon 1973; JHA 10, 100, and 500 indicate treatments with 10, 100, and 500 μg of methoprene, respectively **P<0.01; ***P<0.001 Herman 1975;Herman and Bennett 1975;Ramalingam and Craig 1977;Piulachs et al 1992). However, it is unlikely that JH functions as an inhibitor of sexual maturation in drones because the JH production and hemolymph titer increase with maturation of reproductive organs (Tozetto et al 1995;Giray and Robinson 1996;Harano et al 2008).…”

Section: Role Of Jh In Physiological Maturationmentioning

confidence: 96%

“…Spermatogenesis proceeds in the testis before or after adult emergence, and JH does not appear to regulate this process (Wyatt and Davey 1996). On the other hand, previous studies show that JH promotes the secretory activity of reproductive accessory glands in males of various insects such as Rhodnius (Wigglesworth 1936), cockroaches (Blaine and Dixon 1973;Piulachs et al 1992), locusts (Loher 1961), mosquitoes (Ramalingam and Craig 1977), and butterflies (Herman 1975;Herman and Bennett 1975).…”

Section: Introductionmentioning

confidence: 97%

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Effects of juvenile hormone analog on physiological and behavioral maturation in honeybee drones

Harano¹

2013

Apidologie

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International audienceThe functions of juvenile hormone in the physiological and behavioral maturation in Apis mellifera males (drones) were investigated by application of a juvenile hormone analog, methoprene. No evidence was found for the stimulation of maturation of male reproductive organs by methoprene. The dry weight of the seminal vesicle and reproductive accessory gland was slightly but significantly lighter in drones treated with a high dose (100 or 500 μg/male) of methoprene than drones treated either with a low dose (1 or 10 μg/male) or solvent control only. Methoprene accelerated in-colony male movement from the center to the periphery. It also induced earlier diet transition from pollen and jelly-like materials to honey. These results suggest that juvenile hormone acts as a behavioral pacemaker rather than as a gonadotropin in drones

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Section: Role Of Jh In Physiological Maturationmentioning

confidence: 96%

Section: Introductionmentioning

confidence: 97%

Effects of juvenile hormone analog on physiological and behavioral maturation in honeybee drones

Harano¹

2013

Apidologie

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“…Using Aedes aegypti (L.), Ramalingam and Craig (1977) have examined the effects of cautery of the corpora allata and of applying a synthetic JH (Williams-Law mixture) to male pupae and adults of differing ages and after multiple matings. Corpus allatum cautery in teneral and 1-day post-eclosion males prevents the increase in length and width of accessory glands (i.e.…”

Section: Endocrine Influencesmentioning

confidence: 99%

“…Corpus allatum cautery in teneral and 1-day post-eclosion males prevents the increase in length and width of accessory glands (i.e. Though it is dear that JH affects the secretory activity of the accessory glands in A. aegypti, the speculation by Ramalingam and Craig (1977) that the stimulus (JH) to initiate secretion in the accessory glands originates in the pupal stage about 8 h before eclosion is unfounded, especially in view of the authors' inability to demonstrate a JH effect in 40-h-old pupae. Cautery 2-3 days posteclosion had no effect on gland dimensions, presumably because, the authors note, filling of the glands occurs within 3 days of emergence.…”

Section: Endocrine Influencesmentioning

confidence: 99%

Invitation Paper (C.P. Alexander Fund): Endocrine Regulation of Male Accessory Gland Development and Activity

Gillott

Gaines

1992

Can Entomol

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Can. Ent. 124: 871-886 (1992) For most species, the male accessory glands are mesodermal derivatives. Their form is as varied as are the functions of the secretion they produce. The post-embryonic development and differentiation of the glands, like those of other tissues, appear to be regulated by the interaction of juvenile hormone (JH) and ecdysteroid, the former inhibiting and the latter promoting these processes. Post-eclosion accessory gland activity (i.e. production of secretion), for most species examined, is regulated by JH. However, the precise mechanism of control and the site of action are not at all clear. A limited amount of in vitro work indicates a direct action of JH on the accessory glands though only for Drosophila melanogaster Meigen has a JH-receptor protein been identified. The JH promotes the synthesis of spec$c proteins in the accessory gland secretion, and two proposals have been made for the site and mode of action of the hormone. In the first it is suggested that the hormone affects membrane permeability, thereby influencing the supply of protein precursors; in the second a more direct action of JH at the gene level is proposed, namely, the promotion of translation.

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“…aegypti . Topical application of a juvenile hormone analogue (JHA) induced precocious and enhanced MAG secretions (Ramalingam and Craig, 1977). Treatment with the JHA also increased the potency of males, resulting in the insemination of a larger number of females, and also stimulated secretion in fully depleted MAGs.…”

Section: Introductionmentioning

confidence: 99%

JH biosynthesis and hemolymph titers in adult male Aedes aegypti mosquitoes

Nouzová

Michalková

Hernández‐Martínez

et al. 2018

Insect Biochemistry and Molecular Biology

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Juvenile hormone (JH) is a major hormonal regulator in insects. In Aedes aegypti females, JH signals the completion of the ecdysis to the adult stage and initiates reproductive processes. Although the regulation of JH synthesis and titer in Ae. aegypti females has been extensively studied, relatively little is known about changes of JH synthesis and titers in male mosquitoes, as well as on the roles of JH controlling male reproductive biology. A better understanding of male mosquito reproductive biology, including an improved knowledge of the hormonal control of reproduction, could increase the likelihood of success of male-targeting vector control programs. Using a high performance liquid chromatography coupled to electrospray tandem mass spectrometry method, we measured JH biosynthesis and hemolymph levels in male mosquitoes during pupal and adult stages. Our results revealed tightly concomitant changes in JH biosynthesis and JH hemolymph titers. Synthesis of JH III was very low in late pupae, significantly increased during the first 24 h after adult eclosion, and then remained relatively constant during the first six days after adult eclosion. Feeding high sugar diets resulted in an increase of JH synthesis and titers, and starvation significantly decreased JH synthesis, but this effect could be reversed by changing the males back to a high sugar diet. JH synthesis rates were similar in virgin and mated males, but hemolymph JH levels were different in well-nourished virgin and mated males. Starvation resulted in a significant reduction in insemination rates; with well-nourished males inseminating 2 times more females than water-fed. Giving a 20% sugar meal for 24 h to those mosquitoes that were previously starved for 6 days, caused a significant rise in insemination rates, restoring them to levels similar to those recorded for 20% fed males. These results suggest that nutrition plays a role on male fecundity, and this effect might be mediated by JH.

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THE EFFECTS OF A JH MIMIC AND CAUTERIZATION OF THE CORPUS ALLATUM COMPLEX ON THE MALE ACCESSORY GLANDS OF AEDES AEGYPTI (DIPTERA: CULICIDAE)

Cited by 19 publications

References 15 publications

Effects of juvenile hormone analog on physiological and behavioral maturation in honeybee drones

Effects of juvenile hormone analog on physiological and behavioral maturation in honeybee drones

Invitation Paper (C.P. Alexander Fund): Endocrine Regulation of Male Accessory Gland Development and Activity

JH biosynthesis and hemolymph titers in adult male Aedes aegypti mosquitoes

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