Results 61 to 70 of about 4,595,378 (204)

Host plant pubescence: Effect on silverleaf whitefly, Bemisia argentifolii, fourth instar and pharate adult dimensions and ecdysteroid titer fluctuations

open access: yesJournal of Insect Science, 2003
The ability to generate physiologically synchronous groups of insects is vital to the performance of investigations designed to test insect responses to intrinsic and extrinsic stimuli. During a given instar, the silverleaf whitefly, Bemisia argentifolii,
Dale B. Gelman, Dan Gerling
doaj  

E- and Z-Isomers of New Phytoecdysteroid Conjugates from French Polynesian Microsorum membranifolium (Polypodiaceae) Fronds

open access: yesMolecules, 2012
Phytochemical investigation of the fronds of Microsorum membranifolium resulted in the isolation of a new phytoecdysteroid, E-2-deoxy-20-hydroxyecdysone 3-[4-(1-b-D-glucopyranosyl)]-caffeate (1), together with two known phytoecdysteroids, E-2-deoxy-20 ...
René Lafont   +3 more
doaj   +1 more source

BmFoxO Gene Regulation of the Cell Cycle Induced by 20-Hydroxyecdysone in BmN-SWU1 Cells. [PDF]

open access: yesInsects, 2020
Ecdysteroid titer determines the state of the cell cycle in silkworm (Bombyxmori) metamorphosis. However, the mechanism of this process is unclear. In this study, we demonstrated that the BmFoxO gene participates in the regulation of the cell cycle ...
Zhang Q   +10 more
europepmc   +2 more sources

From pollen provision to pollinator: Species‐specific sterol assimilation by wild bees in urban landscapes

open access: yesFunctional Ecology, Volume 40, Issue 6, Page 1906-1920, June 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Human‐driven landscape change, particularly urbanization, is reshaping pollinator communities, yet the functional traits that mediate species persistence remain poorly understood. Dietary specialization is commonly used to predict species vulnerability.
Yan Yang   +5 more
wiley   +1 more source

Heterokairic Genes and the Eco‐Evo‐Devo of Timing

open access: yesEvolution &Development, Volume 28, Issue 2, June 2026.
Heterokairic genes as the bridge (Heterokairic Pathways?): Heterokairic genes are heterochronic regulators whose activity is modulated by environmental conditions. External cues (e.g., temperature, nutrition, oxygen, density: yellow box) are sensed (yellow arrows) and converted into endocrine and metabolic signals (purple box and arrow into fish's ...
Leandro Lofeu, Ehsan Pashay Ahi
wiley   +1 more source

Counteraction by 20-hydroxyecdysone of the effect of juvenile hormone on phosphorylation of ribosomal protein S6

open access: yes, 1987
Phosphorylation of ribosomal protein S6, induced when the fat body of Sarcophaga peregrina (flesh-fly) larvae was incubated in vitro in the presence of 32P, was found to be suppressed by juvenile hormone.
Kohji Itoh   +5 more
core   +1 more source

Depression of Synaptic Efficacy at Intermolt in Crayfish Neuromuscular Junctions by 20-Hydroxyecdysone, a Molting Hormone [PDF]

open access: yes, 1998
Cooper, Robin L. and Marvin E. Ruffner. Depression of synaptic efficacy at intermolt in crayfish neuromuscular junctions by 20-hydroxyecdysone, a molting hormone. J. Neurophysiol. 79: 1931–1941, 1998. This report demonstrates that ecdysteroids can reduce
Marvin E. Ruffner, Robin L. Cooper
core   +1 more source

From flower buds to bolls: how cotton reproductive structures shape boll weevil development, reproduction and survival

open access: yesPest Management Science, Volume 82, Issue 5, Page 4576-4584, May 2026.
Female boll weevils feeding on flower buds promote reproduction regardless of their immature diet, whereas boll feeding increases lipid reserves and lifespan, revealing a nutrition‐driven trade‐off that sustains survival and reproduction in tropical boll weevil populations.
Roberta Ramos Coelho   +5 more
wiley   +1 more source

Phenotypic and Molecular Analysis of the Effect of 20-hydroxyecdysone on the Human Filarial Parasite Brugia malayi

open access: yes, 2016
A homologue of the ecdysone receptor has been identified and shown to be responsive to 20- hydroxyecdysone in Brugia malayi. However, the role of this master regulator of insect development has not been delineated in filarial nematodes.
Mhashilkar, Amruta S.   +8 more
core   +1 more source

MicroRNA‐375‐3p Targets Fatty Acid Synthase and Relish to Regulate Energy Allocation During Pupal Metamorphosis and Starvation

open access: yesAdvanced Science, Volume 13, Issue 20, 9 April 2026.
During pupal metamorphosis and starvation, elevated 20‐hydroxyecdysone (20E) and suppressed insulin trigger Forkhead box O (FOXO) nuclear translocation, enhancing miR‐375‐3p expression. This downregulates fatty acid synthase (FASN) and Relish, promoting lipid breakdown for energy while prioritizing antioxidant responses over immune functions to support
Peng Chen   +10 more
wiley   +1 more source

Home - About - Disclaimer - Privacy