Results 31 to 40 of about 80,922 (304)

Jasmonic acid levels decline in advance of the transition to the adult phase in maize

open access: yesPlant Direct, 2019
Leaf‐derived signals drive the development of the shoot, eventually leading to flowering. In maize, transcripts of genes that facilitate jasmonic acid (JA) signaling are more abundant in juvenile compared to adult leaf primordia; exogenous application of
Krista Osadchuk   +2 more
doaj   +1 more source

Seasonal changes in plasma levels of sex hormones in the greater Rhea (Rhea americana), a South American Ratite with a complex mating system. [PDF]

open access: yesPLoS ONE, 2014
Seasonal rhythm in sex hormones has been extensively studied in birds, as well as its relationship with the type of mating system. The Greater Rhea (Rhea americana), a South American ratite species, reproduces seasonally and has a complex mating system ...
Diego J Valdez   +6 more
doaj   +1 more source

Does individual variation in metabolic phenotype predict fish behaviour and performance? [PDF]

open access: yes, 2015
There is increasing interest in documenting and explaining the existence of marked intraspecific variation in metabolic rate in animals, with fishes providing some of the best-studied examples.
Killen, S. S.   +2 more
core   +1 more source

Interactions between 20-Hydroxyecdysone and Juvenile Hormone I, II, and III during the Developmental Stages of Spodoptera frugiperda

open access: yesAgronomy, 2023
Juvenile hormones (JHs) play a crucial role in the development of the fall armyworm, Spodoptera frugiperda, with varying types and concentrations observed at different stages.
Xuesheng Li   +5 more
doaj   +1 more source

Attainment of reproductive competence, phase transition, and quantification of juvenility in mutant genetic screens [PDF]

open access: yes, 2014
Plant development between seedling emergence and flowering is characterized by a series of successive qualitative phases: (1) a post embryonic photoperiodinsensitive phase, during which plants are insensitive to photoperiod; (2) a photoperiod ...
Matsoukas, Ioannis G.
core   +2 more sources

Timing is everything: PTTH mediated DHR4 nucleocytoplasmic trafficking sets the tempo of Drosophila steroid production

open access: yesFrontiers in Endocrinology, 2011
During development multicellular organisms must become sexually mature to reproduce. But what underlying developmental clock times this transition? Recent data shows that in fly larvae, nuclear-cytoplasmic trafficking of DHR4, a nuclear receptor, in ...
Kim F Rewitz, Michael B. O'Connor
doaj   +1 more source

Coping styles in farmed fish: consequences for aquaculture [PDF]

open access: yes, 2017
Individual differences in physiological and behavioural responses to stressors are increasingly recognised as adaptive variation and thus raw material for evolution and fish farming improvements including selective breeding. Such individual variation has
Begout, Marie-Laure   +9 more
core   +4 more sources

Bioanalogues oj juvenile hormones and intestines mycoflora of some insects

open access: yesActa Mycologica, 2014
The subject of this paper is the influence of JH bioanalogues on the mycoflora of intestines of three species of inscets: Dysdereus cinaulams, Pyrrhocoris apterus and Tenebrio molitor. The results are presented in tables.
Andrzej Nespiak   +2 more
doaj   +1 more source

The Schistosoma mansoni Cytochrome P450 (CYP3050A1) Is Essential for Worm Survival and Egg Development. [PDF]

open access: yes, 2015
Schistosomiasis affects millions of people in developing countries and is responsible for more than 200,000 deaths annually. Because of toxicity and limited spectrum of activity of alternatives, there is effectively only one drug, praziquantel, available
Barnard, Andrew H   +6 more
core   +3 more sources

Eat to reproduce: a key role for the insulin signaling pathway in adult insects

open access: yesFrontiers in Physiology, 2013
Insects, like all heterotrophic organisms, acquire from their food the nutrients that are essential for anabolic processes that lead to growth (larval stages) or reproduction (adult stage).
Liesbeth eBadisco   +2 more
doaj   +1 more source

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