The Chemistry and Physiology of Juvenoids

Sláma, Karel; Romaňuk, M.; Šorm, F.

doi:10.1007/978-3-7091-8331-1_2

Cited by 7 publications

(4 citation statements)

References 250 publications

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“…In particular, they cause arrest andlor disruption of metamorphosis, which results in the formation of supernumerary larvae or nonviable larval-pupal or pupal-adult intermediates [1,2]. The discovery, biology, chemistry, and economic prospects of JHAs have been reviewed extensively [3,4]. The results presented in this paper demonstrate that the failure of methoprene-treated larvae to acquire the high level of ecdysteroids characteristic of the metamorphic stage may be the reason of the inhibition of metamorphosis.…”

Section: Introductionmentioning

confidence: 77%

Ecdysteroid level and the change in sensitivity to a juvenile hormone analogue in Ephestia cautella larvae (Lepidoptera, Phycitidae)

Lazarovici

Shapira

Pisarev

et al. 1984

Arch Insect Biochem Physiol

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A dou ble-antibody ecdysone-specific radioimmunoassay was used to clarify whether the effects on metamorphosis of the juvenile hormone analogue methoprene are correlated with changes in ecdysteroids level. It appears that a small ecdysteroids peak, 5 days before pupation, i s responsible for the transition from inhibition to defective metamorphosis. Study of the changes in ecdysteroid titer in last-instar larvae treated with the JHA 2 days prior to the appearance of the above small ecdysteroids' peak showed an immediate reduction in ecdysteroid level, followed by cyclic, successively reduced titer for about 20 days. After this period the larvae ceased to feed and entered to a diapauselike stage which ended in the death of the larvae. A similar effect on ecdysteroid titer and developmental arrest was exhibited by JHA-treated first-instar larvae. The mechanism of the interactions between JHA and ecdysteroid level deserves further investigation.

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Section: Introductionmentioning

confidence: 77%

Ecdysteroid level and the change in sensitivity to a juvenile hormone analogue in Ephestia cautella larvae (Lepidoptera, Phycitidae)

Lazarovici

Shapira

Pisarev

et al. 1984

Arch Insect Biochem Physiol

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“…It is evident from the study of Sláma et al (1974) and Mkhize (1992), if adult population were treated with high dosages of JHAs, female beetles thus deposite defective eggs of very low or zero hatchability. Sterility in insects might be due to distorted gonads, inhibition of vitellogenin in the ova of treated females, reduction of the number of spermatophores in treated males and extrusion of ovipositor in the adult females (Mondal and Parween, 2000).…”

Section: Discussionmentioning

confidence: 99%

Pyriproxyfen Influenced Reproductive Behaviour of Rice-Moth, Corcyra cephalonica Staint. (Lepidoptera: Pyralidae)

Priyanka,

Shri Krishna

2023

Intern. J. Zool. Invest.

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The rice-moth, Corcyra cephalonica Staint. is one of the serious pests of stored cereals and cereal commodities. Application of juvenile hormone analogue, pyriproxyfen, as a safe and suitable alternative to the conventional organic insecticides, affected the growth, development and metamorphosis of this pest that exerted severe effect on their gonadial physiology and hence, their fecundity and fertility was directly influenced in a dosedependent manner. It was observed that eggs laid by treated females crossed by treated males at 15 ppm concentration of pyriproxyfen show maximum reduction in fecundity i.e. 102.44 ± 6.81 per female and fertility i.e. 31.22 ± 0.32% in case of 1 st instar exposed larvae. Fecundity and fertility was comparatively higher in adults emerged from 2 nd , 3 rd , and 4 th instar larvae, due to their shorter exposure duration. Such finding may be highly useful in the management of C. cephalonica in particular and lepidopterous pests in general.

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“…Another recent microarray analysis of genes that are JH III induced in both Drosophila and honey bee, used dimethyl sulfoxide (DMSO), the carrier for JH III in the experiments, as a control treatment ( Li et al 2007 ). It has been previously shown that DMSO significantly increases juvenoid activity when used as a solvent in a bioassay on Dysdercus cingulatus ( Sláma 1974 ). A search of online data (Appendices 1, 2, and 3) revealed that all of the genes described in Li et al ( 2007 ) as JH III inducible were also induced by MLA in our microarray analysis (Appendix 5 available online).…”

Section: Discussionmentioning

confidence: 99%

Microarray Analysis of Juvenile Hormone Response inDrosophila melanogasterS2 cells

Willis

Wang

Lindholm

et al. 2010

Journal of Insect Science

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A microchip array encompassing probes for 14,010 genes of Drosophila melanogaster was used to analyze the effect of juvenile hormone (JH) on genome-wide gene expression. JH is a member of a group of insect hormones involved in regulating larval development and adult reproductive processes. Total RNA was isolated from Drosophila S2 cells after 4 hours treatment with 250 ng/ml (10R) JH III or 250 ng/ml methyl linoleate. A collection of 32 known or putative genes demonstrated a significant change with JH III treatment (r > 2.0, P ≤ 0.005). Of these, the abundance of 13 transcripts was significantly increased and 19 decreased. The expression of a subset of these loci was analyzed by real-time quantitative reverse transcription polymerase chain reaction (RT-qPCR). Three loci that exhibited constant expression in the presence and absence of JH III (RP49 [FBgn0002626], FBgn0023529, and FBgn0034354) were evaluated and found to be reliable invariant reference transcripts for real-time RT-qPCR analysis using BestKeeper and geNorm software. Increased expression in presence of JH III was confirmed by real-time RTqPCR analysis. However, only one of five loci that exhibited reduced expression on microarrays could be confirmed as significantly reduced (P ≤ 0.05). Among the confirmed JH III up-regulated genes were two loci of unknown function (FBgn0040887 and FBgn0037057) and Epac, an exchange protein directly activated by cyclic AMP, a guanine nucleotide exchange factor for Rap1 small GTPase.

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The Chemistry and Physiology of Juvenoids

Cited by 7 publications

References 250 publications

Ecdysteroid level and the change in sensitivity to a juvenile hormone analogue in Ephestia cautella larvae (Lepidoptera, Phycitidae)

Ecdysteroid level and the change in sensitivity to a juvenile hormone analogue in Ephestia cautella larvae (Lepidoptera, Phycitidae)

Pyriproxyfen Influenced Reproductive Behaviour of Rice-Moth, Corcyra cephalonica Staint. (Lepidoptera: Pyralidae)

Microarray Analysis of Juvenile Hormone Response inDrosophila melanogasterS2 cells

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