Results 81 to 90 of about 670,888 (226)

Physiology of heartbeat reversal in diapausing pupae of the tobacco hornworm, Manduca sexta (Lepidoptera: Sphingidae)

open access: yesEuropean Journal of Entomology, 2001
Pulsations of dorsal vessel were monitored by the noninvasive techniques of contact thermography on the dorsal cuticle and by strain gauge detection of abdominal elongation movements. Diapausing pupae exhibited periods of forward-oriented, or anterograde
Karel SLÁMA, Thomas A. MILLER
doaj   +1 more source

Rhodnius, Golden Oil, and Met: A History of Juvenile Hormone Research

open access: yesFrontiers in Cell and Developmental Biology, 2020
Juvenile hormone (JH) is a unique sesquiterpenoid hormone which regulates both insect metamorphosis and insect reproduction. It also may be utilized by some insects to mediate polyphenisms and other life history events that are environmentally regulated.
Lynn M. Riddiford
doaj   +1 more source

Convergence in Symbiont‐Induced Plant‐Mediated Responses to Herbivory: Cascading Effects for Foraging Parasitoids

open access: yesEcology Letters, Volume 28, Issue 8, August 2025.
Polydnaviruses represent a striking example of convergent evolution. These viruses, divided into bracoviruses and ichnoviruses, were independently acquired by braconid and ichneumonid parasitoid wasps respectively, to deliver pathogenic genes to caterpillar hosts.
Antonino Cusumano   +6 more
wiley   +1 more source

Nicotine's defensive function in nature.

open access: yesPLoS Biology, 2004
Plants produce metabolites that directly decrease herbivore performance, and as a consequence, herbivores are selected for resistance to these metabolites.
Anke Steppuhn   +4 more
doaj   +1 more source

Biochar Suppresses Growth, Pupation and Eclosion Success of a Specialist (Manduca sexta) and a Generalist (Spodoptera frugiperda) Insect Herbivore

open access: yesJournal of Sustainable Agriculture and Environment, Volume 4, Issue 2, June 2025.
ABSTRACT Biochar is a charcoal‐like substance made by the pyrolysis of organic material from agricultural and forestry waste. While biochar is well documented for altering soil physicochemical conditions, few studies have investigated its possible effects on the management of arthropod pests.
Nischal Wagle   +4 more
wiley   +1 more source

Feeding-induced rearrangement of green leaf volatiles reduces moth oviposition

open access: yeseLife, 2013
The ability to decrypt volatile plant signals is essential if herbivorous insects are to optimize their choice of host plants for their offspring. Green leaf volatiles (GLVs) constitute a widespread group of defensive plant volatiles that convey a ...
Silke Allmann   +7 more
doaj   +1 more source

Neuropeptide Ecdysis‐Triggering Hormone and Its Receptor Mediate the Fecundity Improvement of ‘Candidatus Liberibacter Asiaticus’‐Infected Diaphorina citri Females and CLas Proliferation

open access: yesAdvanced Science, Volume 12, Issue 18, May 15, 2025.
In CLas‐infected D. citri, CLas lowers 20E levels initially, relieving the suppression of ETH release. The subsequent increase in ETH levels upregulates its receptor DcETHR and activates the JH signaling pathway. The signaling cascade of 20E‐ETH/ETHR‐JH along with miR‐210, targeting DcETHR, boost female fecundity in CLas+ D.
Xiaoge Nian   +8 more
wiley   +1 more source

V‐ATPase Disassembly at the Yeast Lysosome‐Like Vacuole Is a Phenotypic Driver of Lysosome Dysfunction in Replicative Aging

open access: yesAging Cell, Volume 24, Issue 5, May 2025.
H+‐translocating V‐ATPases are regulated by reversible disassembly in many cell types. In young yeast cells, V‐ATPases are assembled and the lysosome‐like vacuole is acidified, but as cells age, V‐ATPases disassemble, vacuolar pH increases, and lifespan is shortened. Both mutation of the V‐ATPase disassembly factor Oxr1 and caloric restriction preserve
Fiza Hashmi, Patricia M. Kane
wiley   +1 more source

Presence of unsaturated sphingomyelins and changes in their composition during the life cycle of the moth Manduca sexta

open access: yesJournal of Lipid Research, 2004
NMR and electrospray ionization tandem mass spectrometry were used to show for the first time the presence of sphingomyelins in extracts of the tobacco hornworm Manduca sexta (Lepidoptera).
D.T.U. Abeytunga   +6 more
doaj   +1 more source

Transcriptional Reprogramming Deploys a Compartmentalized ‘Timebomb’ in Catharanthus roseus to Fend Off Chewing Herbivores

open access: yesPlant, Cell &Environment, Volume 48, Issue 5, Page 3236-3256, May 2025.
ABSTRACT The evolutionary arms race between plants and insects has led to key adaptive innovations that drive diversification. Alkaloids are well‐documented anti‐herbivory compounds in plant chemical defences, but how these specialized metabolites are allocated to cope with both biotic and abiotic stresses concomitantly is largely unknown.
Yongliang Liu   +11 more
wiley   +1 more source

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