Integration of photoperiodic and temperature cues by the circadian clock to regulate insect seasonal adaptations DOI Creative Commons
Sergio Hidalgo, Joanna C. Chiu

Journal of Comparative Physiology A, Год журнала: 2023, Номер 210(4), С. 585 - 599

Опубликована: Авг. 16, 2023

Abstract Organisms adapt to unfavorable seasonal conditions survive. These adaptations rely on the correct interpretation of environmental cues such as photoperiod, and temperature. Genetic studies in several organisms, including genetic powerhouse Drosophila melanogaster , indicate that circadian clock components, period timeless are involved photoperiodic-dependent adaptations, but our understanding this process is far from complete. In particular, role temperature a key factor complement photoperiodic response not well understood. The development new sequencing technologies has proven extremely useful plastic changes other cellular components undergo different conditions, gene expression alternative splicing. This article discusses integration photoperiod for biology downstream molecular pathways regulation physiological occur with changing seasons. We focus discussion current involvement neuronal circuits these D. .

Язык: Английский

Heat and Cold Shocks Decrease the Incidence of Diapause in Trichogramma telengai Larvae DOI Creative Commons
Н. Д. Войнович, S. Ya. Reznik

Insects, Год журнала: 2025, Номер 16(1), С. 54 - 54

Опубликована: Янв. 8, 2025

Insect diapause and response to thermal stress are similar in the variety of manifestations. However, influence shocks on incidence insect has not been sufficiently studied. Our laboratory experiments showed that both cold (-10 °C) heat (43 experienced for at least 20-30 min significantly reduced facultative larval winter egg parasitoid Trichogramma telengai. patterns these responses were substantially different. In particular, peaks sensitivity diapause-averting effects fell, correspondingly, middle-stage (5 days development 15 late-stage (9-11 larvae. Heat mostly via changes initial proportions diapause-destined non-diapause-destined individuals, whereas effect is based differential mortality (i.e., difference among treatments same experiment) with better survival individuals. These results elucidate peculiarities interaction between diapause, allowing us specify methods mass rearing storage.

Язык: Английский

Процитировано

0

A Head‐Specific Transcriptomic Study Reveals Key Regulatory Pathways for Winter Diapause in the Mosquito Culex pipiens DOI Open Access
Prabin Dhungana, Xueyan Wei, David Sung Yong Kang

и другие.

Archives of Insect Biochemistry and Physiology, Год журнала: 2025, Номер 118(2)

Опубликована: Фев. 1, 2025

ABSTRACT The primary vector of the West Nile virus, Culex pipiens , undergoes reproductive dormancy during adverse winter season. While our current understanding has mainly focused on cellular signals and phenotypic shifts occurring at a global scale diapause, information tissue‐specific transcriptomic changes remains limited. This knowledge gap is major challenge in interpreting regulatory mechanisms tissue level. To address this, present work utilized RNA‐seq technology to investigate transcriptional head that house brain crucial endocrinal organs such as corpora allata. We obtained RNA samples from heads diapausing nondiapausing female mosquitoes two specific time intervals, ZT0 ZT16, then subjected them sequencing. Our results revealed differences differentially expressed genes between diapause non‐diapause highlighting diel variations gene expression. also selected twelve associated with phenotype examined transcript abundance six different points over 24 h. qRT‐PCR analysis showed similar up‐ downregulation transcripts nondiapause phenotypes thus validating RNA‐seq. In summary, study identified new differentiation their expression, potentially linking photoperiod seasonal insects. newly presented will significantly advance head‐specific for insect diapause.

Язык: Английский

Процитировано

0

A genome-wide association study implicates the olfactory system in Drosophila melanogaster diapause-associated lifespan extension and fecundity DOI Open Access
Sreesankar Easwaran, Denise J. Montell

Опубликована: Фев. 26, 2025

The effects of environmental stress on animal life are gaining importance with climate change. Diapause is a dormancy program that occurs in response to an adverse environment, followed by resumption development and reproduction upon the return favorable conditions. complex trait, so we leveraged Drosophila genetic reference panel (DGRP) lines conducted Genome-Wide Association Study (GWAS) characterize basis diapause. We assessed post-diapause non-diapause fecundity across 193 DGRP lines. GWAS revealed 546 variants, encompassing single nucleotide polymorphisms, insertions deletions associated fecundity. identified 291 candidate diapause-associated genes, 40 which had previously been diapause, 89 were more than one SNP. Gene network analysis indicated genes primarily linked neuronal reproductive system development. Similarly, comparison results from other fly greatest overlap olfactory-behavior-associated fecundity-and-lifespan-associated genes. An RNAi screen selected candidates two Dip-𝛾 Scribbler, be required during recovery for complemented test neurons successful found although amputation antenna little no effect lifespan, it reduced diapause lifespan postdiapause further show olfactory receptor temperature-sensing Our provide insights into molecular, cellular, adult .

Язык: Английский

Процитировано

0

Diapause in parasitoids: a systematic review DOI
Zhen Shen,

Liang‐De Tang,

Nicolas Desneux

и другие.

Journal of Pest Science, Год журнала: 2025, Номер unknown

Опубликована: Март 7, 2025

Язык: Английский

Процитировано

0

Endocrine and enzymatic shifts during insect diapause: a review of regulatory mechanisms DOI Creative Commons

Hamzeh Izadi

Frontiers in Physiology, Год журнала: 2025, Номер 16

Опубликована: Март 14, 2025

Insect diapause is a vital survival strategy that enables insects to enter state of suspended development, allowing them withstand unfavorable environmental conditions. During diapause, significantly lower their metabolic rate and build up energy reserves, which they gradually utilize throughout this period. The regulation involves complex interaction hormones enzymes. Juvenile (JHs) affect adults larvae differently; in adults, the absence JH typically triggers while larvae, presence encourages state. Ecdysteroids, regulate molting metamorphosis, are carefully controlled prevent premature development. Reduced signaling insulin-like peptides enhances stress resistance promotes storage. Several enzymes play crucial roles adjustments necessary for diapause. These include degradation JH, ecdysteroidogenic pathway, metabolism fatty acids, glycogen, cryoprotectants, responses. Understanding diapause's molecular biochemical mechanisms essential fundamental entomological research practical applications. Despite recent advances, many aspects regulation, especially interactions among hormonal pathways role enzymes, remain poorly understood. This review analyzes approximately 250 papers consolidate current knowledge on enzymatic It offers comprehensive overview key processes based studies suggests future directions fill gaps our understanding significant biological phenomenon. also lays groundwork enhancing pest control strategies ecological conservation by deepening mechanisms.

Язык: Английский

Процитировано

0

Postdiapause mating in bumblebee queens (Bombus terrestris): a novel strategy for conservation and laboratory breeding DOI
Alena Votavová

Apidologie, Год журнала: 2025, Номер 56(2)

Опубликована: Март 20, 2025

Язык: Английский

Процитировано

0

The role of insulin receptor InR in photoperiod-regulated reproductive diapause of Chrysoperla nipponensis DOI
Xiao Wang, Minghui Xu,

Xue Kong

и другие.

Insect Biochemistry and Molecular Biology, Год журнала: 2025, Номер unknown, С. 104305 - 104305

Опубликована: Март 1, 2025

Язык: Английский

Процитировано

0

Diapause and Anoxia-Induced Quiescence Are Unique States in Embryos of the Annual Killifish, Austrofundulus limnaeus DOI Creative Commons

Patrick R. Clouser,

Claire L. Riggs, Amie Romney

и другие.

Biomolecules, Год журнала: 2025, Номер 15(4), С. 515 - 515

Опубликована: Апрель 1, 2025

Diapause is a state of developmental and metabolic dormancy that precedes exposure to environmental stresses. Yet, diapausing embryos are typically stress-tolerant. Evidence suggests "prepare" for stress as part gene expression program they enter dormancy. Here, we investigate if diapause II the annual killifish Austrofundulus limnaeus, which can survive hundreds days anoxia, mount transcriptomic response anoxic insult. Bulk RNAseq was used characterize transcriptomes exposed normoxia, 4 h 24 2 normoxic recovery from anoxia. Differential ontology analyses were probe pathways may mitigate survival. Transcriptional factor analysis predict potential mediators this response. Diapausing exhibited robust anoxia returns near baseline conditions after h. Anoxia induced an upregulation genes involved in integrated response, lipid metabolism, p38mapk kinase signaling, apoptosis. Developmental mitochondrial decreased. We conclude when faced with This consistent mediating expected challenges cellular homeostasis

Язык: Английский

Процитировано

0

Novel genetic association with migratory diapause in Australian monarch butterflies DOI Creative Commons
William Hemstrom, Micah G. Freedman, Myron P. Zalucki

и другие.

BMC Ecology and Evolution, Год журнала: 2025, Номер 25(1)

Опубликована: Май 7, 2025

Язык: Английский

Процитировано

0

Diet of adult ladybird beetle host modifies the postdiapause development of the parasitoid Dinocampus coccinellae (Hymenoptera: Braconidae) DOI Creative Commons
John J. Obrycki, Catherine A. Tauber,

Maurice J. Tauber

и другие.

European Journal of Entomology, Год журнала: 2025, Номер 122, С. 111 - 117

Опубликована: Май 28, 2025

Язык: Английский

Процитировано

0