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228 results for “light responsive”
Data from: Differential responses of coral larvae to the colour of ambient light guide them to suitable settlement microhabitat
Reef-building corals produce planktonic planula larvae that must select an appropriate habitat to settle and spend the rest of their life, a behaviour that plays a critical role in survival. Here, we report that larvae obtained from a deep-water population of Pseudodiploria strigosa settled more readily under blue light and in the dark, which aligns well with the light field characteristics of their natal habitat. By contrast, larvae of the shallow-water coral Acropora millepora settled in high proportions under blue and green light while settlement was less in the dark. Acropora millepora larvae also showed reduced settlement under red light, which should be abundant at shallow depth. Hypothesizing that this might be a mechanism preventing the larvae from settling on the exposed upwards-facing surfaces, we quantified A. millepora settlement in manipulated light chambers in situ on the reef. While A. millepora larvae naturally preferred settling on vertical rather than exposed horizontal surfaces, swapping the colours of upwards-facing and sideways-facing light fields was sufficient to invert this preference. We also tested if the variation in intrinsic red fluorescence in A. millepora larvae correlates with settlement rates, as has been suggested previously. We observed this correlation only in the absence of light, indicating that larval red fluorescent protein is probably not directly involved in light sensing. Our study reveals previously under-appreciated light-sensory capabilities in coral larvae, which could be an important axis of ecological differentiation between coral species and/or populations.
Data from: Dynamic antagonism between phytochromes and PIF-family bHLHs induces selective reciprocal responses to light and shade in a rapidly responsive transcriptional network in Arabidopsis
Plants respond to shade-modulated light-signals, via the phytochrome (phy) system, by adaptive changes, collectively termed the shade avoidance syndrome (SAS). To examine the roles of the Phy-Interacting bHLH Factors, PIF1, 3, 4 and 5, in relaying this information to the transcriptional network, we compared the genome-wide expression profiles of wild-type and quadruple pif (pifq) mutants in response to shade. The data identify a subset of genes, enriched in transcription-factor-encoding loci, that respond rapidly (within 1 h), in a PIF-dependent manner, to the shade signal, and that contain promoter-located G-box-sequence motifs (CACGTG), known to be preferred PIF binding sites. These genes are thus potential direct targets of phy-PIF signaling that function in the primary transcriptional circuitry controlling downstream response-elaboration. A second subset of PIF-dependent, early-response genes, lacking G-box motifs, are enriched for auxin-responsive loci, suggestive of being indirect targets of phy-PIF signaling involved in the rapid cell-expansion known to be induced by shade. A meta-analysis comparing deetiolation- and shade-responsive transcriptomes identifies a further subset of G-box-containing genes that reciprocally display rapid repression and induction in response to light and shade signals at the inception of deetiolation and shade-avoidance, respectively. Collectively, these data define a core set of transcriptional and hormonal (auxin, cytokinin) processes that appear to be dynamically poised to react rapidly to changes in the light environment via perturbations in the mutually antagonistic actions of the phys and PIFs. Data from comparative analysis of the quadruple pifq and all triple pif-mutant combinations in response to light and shade, confirm that the PIF-quartet members act with overlapping redundancy on seedling morphogenesis and transcriptional regulation, but that the individual PIFs contribute differentially to these responses.
Skeletonema marinoi eco-types show specific habitat-related responses to fluctuating light supporting high potential for growth under photobioreactor light regime
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Fig. 2 in The response of Phyllophaga brevidens and Phyllophaga lenis (Coleoptera: Scarabaeidae) to methyl 2-(methylthio) benzoate and light
Fig. 2. Phylogenetic tree of Phyllophaga species according to the cytochrome oxidase 1 gene, determined using the maximum likelihood method, with the general time reversible with a gamma distribution and invariant sites (GTR + G + I) nucleotide substitution model, and 500 bootstrap repetitions. The species caught in Morelos are shown in boldface.
Fig. 2 in Halyomorpha halys (Hemiptera: Pentatomidae) response to pyramid traps baited with attractive light and pheromonal stimuli
Fig. 2. Mean capture rates of Halyomorpha halys in black pyramid traps with fluorescent blue lights placed next to structures with competing light sources or next to wood line without competing lights, during early season (A), mid-season (B), and late season (C).
Data from: Light sensing by opsins and fungal ecology: NOP-1 modulates entry into sexual reproduction in response to environmental cues
Understanding the genetic basis of the switch from asexual to sexual lifestyles in response to sometimes rapid environmental changes is one of the major challenges in fungal ecology. Light appears to play a critical role in the asexual–sexual switch—but fungal genomes harbour diverse light sensors. Fungal opsins are homologous to bacterial green-light-sensory rhodopsins, and their organismal functions in fungi have not been well understood. Three of these opsin-like proteins were widely distributed across fungal genomes, but homologs of the Fusarium opsin-like protein CarO were present only in plant-associated fungi. Key amino acids, including potential retinal binding sites, functionally diverged on the phylogeny of opsins. This diversification of opsin-like proteins could be correlated with life history-associated differences among fungi in their expression and function during morphological development. In Neurospora crassa and related species, knockout of the opsin NOP-1 led to a phenotype in the regulation of the asexual–sexual switch, modulating response to both light and oxygen conditions. Sexual development commenced early in ∆nop-1 strains cultured in unsealed plates under constant blue and white light. Furthermore, comparative transcriptomics showed that the expression of nop-1 is light-dependent and that the ∆nop-1 strain abundantly expresses genes involved in oxidative stress response, genes enriched in NAD/NADP binding sites, genes with functions in proton transmembrane movement and catalase activity, and genes involved in the homeostasis of protons. Based on these observations, we contend that light and oxidative stress regulate the switch via light-responsive and ROS pathways in model fungus N. crassa and other fungi.
Ultraviolet polarized light pollution responses by aquatic insects
<p>This dataset contains data from a field-based experiment described in the paper: "Fraleigh, D., Barratt Heitman, J., Robertson, B.A. (2021) Ultraviolet polarized light pollution and evolutionary traps for aquatic insects. Animal Behaviour. October."</p> <p>The experiment investigates the ability of different families of aquatic insects to detect and move toward sources of ultraviolet polarized light. The experiment conducted adjacent to the Saw Kill River in Annandale-on-Hudson, NY and wild emergent aquatic insects were simultaneously exposed to five lighting treatments: 1) polarized visible wavelengths of light , 2) polarized visible and polarized ultraviolet light, 3) unpolarized visible light, 4) polarized ultraviolet light and unpolarized visible light, and 5) unpolarized visible and ultraviolet light. Insects attracted to a light source reflecting from a oil-filled tray would touch down upon the oil and become trapped. The main results of the experiments was that one family of aquatic insects seems to have the ability to see ultraviolet polarized light and use it as a nocturnal cue to the location of water bodies, while terrestrial insects showed no indication of responses to any type of polarized light. </p>
Figs. 1–2 in On the Phototactic Response of RwandanDiaphanesMotschulsky (Coleoptera: Lampyridae) to a Trap with a 630Nm Red Light
Figs. 1–2. Diaphanes sp. 1) Dorsal habitus; 2) Ventral habitus.
Figs. 3–4. Red light trap. 3 in On the Phototactic Response of RwandanDiaphanesMotschulsky (Coleoptera: Lampyridae) to a Trap with a 630Nm Red Light
Figs. 3–4. Red light trap. 3) Simplified illustration; 4) Actual trap.
Tree seedling trait optimization and growth in response to local-scale soil and light variability
At local scales, it has been suggested that high levels of resources lead to increased tree growth via trait optimization (highly peaked trait distribution). However, this contrasts with (i) theories that suggest that trait optimization and high growth occur in the most common resource level and (ii) empirical evidence showing that high trait optimization can be also found at low resource levels. This raises the question of how are traits and growth optimized in highly diverse plant communities? Here, we propose a series of hypotheses about how traits and growth are expected to be maximized under different resource levels (low, the most common, and high) in tree seedling communities from a subtropical forest in Puerto Rico. We studied the variation in the distribution of biomass allocation and leaf traits and seedlings growth rate along four resource gradients: light availability (canopy openness) and soil K, Mg, and N contents. Our analyses consisted of comparing community trait means, trait kurtosis (a measurement of trait optimization), and relative growth rates at three resource levels (low, common, and high). Trait optimization varied across the three resource levels depending on the type of resource and trait, with leaf traits being optimized under high N and in the most common K and Mg conditions, but not at any of the light levels. Also, seedling growth increased at high light conditions and high N and K but was not related to trait kurtosis. Our results indicate that local-scale variability of soil fertility and understory light conditions result in shifts in species ecological strategies that increase growth despite a weak trait optimization, suggesting the existence of alternative phenotypes that achieve similar high performance. Uncovering the links between abiotic factors, functional trait diversity and performance is necessary to better predict tree responses to future changes in abiotic conditions.
Lighting and Human Response in Motor Time, Autonomic Nervous System, and Emotion
ClinicalTrials.gov study NCT03144791. IPD Sharing: NO. Countries: 0. Publications: 3.
Understanding Circadian Responses to Light in Persons With Mild Cognitive Impairment
ClinicalTrials.gov study NCT05411822. IPD Sharing: NO. Countries: 1. Publications: 0.
Neuro-affective Response to Light in Depressed Adolescents and Young Adults
ClinicalTrials.gov study NCT05712772. IPD Sharing: YES. Countries: 1. Publications: 0.
Data from: Differential responses of coral larvae to the colour of ambient light guide them to suitable settlement microhabitat
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Data from: Response of bats to light with different spectra: light-shy and agile bat presence is affected by white and green, but not red light
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Data from: The role of transcriptomes linked with responses to light environment on seedling mortality in a subtropical forest, China
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Data from: Light sensing by opsins and fungal ecology: NOP-1 modulates entry into sexual reproduction in response to environmental cues
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Data from: Light accelerates plant responses to warming
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Ultraviolet polarized light pollution responses by aquatic insects
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Traits mediate a tradeoff in seedling growth response to light and conspecific density in a diverse subtropical forest
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.