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288 results for “Root effect”
Data from: The effect of drought and season on root life span in temperate arbuscular mycorrhizal and ectomycorrhizal tree species
1. Fine roots play a key role in carbon (C) and nutrient cycling, since fine root lifespan drives soil organic C input and, thus, N availability. The two principal fungal symbioses found in temperate forest trees, ectomycorrhizae (ECM) and arbuscular mycorrhizae (AM), induce different root morphological changes upon infection, but the consequences for root lifespan are not clear. 2. We explored differences in fine root lifespan between four AM and four ECM tree species using mini-rhizotrons in a factorial drought experiment in large mesocosms. 3. Median root lifespan of young AM and ECM trees differed fundamentally in its response to soil moisture and season of root birth: ECM root lifespan was reduced from 176 to 81 d in dry soil compared to moist soil, independent of season. By contrast, AM root lifespan was less responsive to drought, but decreased from 185 to 127 d when comparing roots produced early in the growing season vs. mid-season. In both mycorrhizal types, root lifespan was positively related to root diameter and negatively to the portion of lower-order roots. 4. Synthesis. While our results indicate morphological and architectural traits that predict root lifespan across tree species, they also indicate principal differences in the environmental response of root lifespan in young AM and ECM trees. This knowledge helps to improve global predictions of root lifespan.
Data from: Root effect haemoglobins in fish may greatly enhance general oxygen delivery relative to other vertebrates
The teleost fishes represent over half of all extant vertebrates; they occupy nearly every body of water and in doing so, occupy a diverse array of environmental conditions. We propose that their success is related to a unique oxygen (O2) transport system involving their extremely pH-sensitive haemoglobin (Hb). A reduction in pH reduces both Hb-O2 affinity (Bohr effect) and carrying capacity (Root effect). This, combined with a large arterial-venous pH change (ΔpHa-v) relative to other vertebrates, may greatly enhance tissue oxygen delivery in teleosts (e.g., rainbow trout) during stress, beyond that in mammals (e.g., human). We generated oxygen equilibrium curves (OECs) at five different CO2 tensions for rainbow trout and determined that, when Hb-O2 saturation is 50% or greater, the change in oxygen partial pressure (ΔPO2) associated with ΔpHa-v can exceed that of the mammalian Bohr effect by at least 3-fold, but as much as 21-fold. Using known ΔpHa-v and assuming a constant arterial-venous PO2 difference (Pa-vO2), Root effect Hbs can enhance O2 release to the tissues by 73.5% in trout; whereas, the Bohr effect alone is responsible for enhancing O2 release by only 1.3% in humans. Disequilibrium states are likely operational in teleosts in vivo, and therefore the ΔpHa-v, and thus enhancement of O2 delivery, could be even larger. Modeling with known Pa-vO2 in fish during exercise and hypoxia indicates that O2 release from the Hb and therefore potentially tissue O2 delivery may double during exercise and triple during some levels of hypoxia. These characteristics may be central to performance of athletic fish species such as salmonids, but may indicate that general tissue oxygen delivery may have been the incipient function of Root effect Hbs in fish, a trait strongly associated with the adaptive radiation of teleosts.
Effect of root volume density on the mechanical behaviour of saturated sand under drained and undrained conditions
<p>Experimental data for manuscript "Effect of root volume density on mechanical behavior of saturated sand under drained and undrained conditions",submitted to Acta Geotechnica.</p>
Effect of fed root on Orobanche growth
Open the record for dataset details and reuse information.
The Effects of Wild Boar Rooting on Epigeic Arthropods in Oak Forests
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Data from: Corrections for rooting volume and plant size reveal negative effects of neighbour presence on root allocation in pea
Plants are able to detect the presence of their neighbours belowground. The associated root responses may affect plant performance, plant-plant interactions and community dynamics, but the extent and direction of these responses is heavily debated. Some studies suggest that plants will over-proliferate roots in response to neighbours at the expense of reproduction, which was framed as a "tragedy of the commons". Others proposed an "ideal free distribution" hypothesis, stating that plants produce roots simply as a function of the amount of available nutrients. However, experimental evidence for either hypothesis that is unbiased by confounding effects of rooting volume and plant size in their experimental setups is still lacking. We grew split-root pea plants in the presence or absence of a belowground neighbour at a range of rooting volumes, while providing equal amounts of nutrients per plant. Path analyses were used to disentangle the direct effects of neighbour presence on allocation patterns from the confounding effects of rooting volume and plant size. Within the chosen range of rooting volumes, the presence of a belowground neighbour generally reduced plant root mass by 21% and total mass by 9%. A doubling of rooting volume generally increased plant root mass by 18% and total mass by 11%. Pod mass was only directly and positively correlated with vegetative mass. The presence of a belowground neighbour induced less root allocation but more pod allocation, whereas increased rooting volume caused a reduction in reproductive allocation. A large part of these effects, however, was indirectly mediated through the influence on plant total mass. Synthesis: Not considering the effects of rooting volume and plant size may lead to misinterpretations of plant growth strategies in response to neighbours. Accounting for these factors, we found pea allocating less mass to roots in the presence of a belowground neighbour. The obtained results can help to reconcile the various responses to belowground neighbours as they are published in the literature.
Figures 2-4 from: Yang Y-G, Shang G-Z, Wu X-Q, Chen H-Q, Wu Y, Cao Y-F, Bian J-H (2021) Effects of parasites and predators on nociception: decreases analgesia reduces overwinter survival in root voles (Rodentia: Cricetidae). Zoologia 38: 1-9. https://doi.org/10.3897/zoologia.38.e67845
Figures 2-4 Monthly apparent survival probability (2), population change rate (3) and population size (4) of root voles during the live-trapping sessions under two different groups. H signifies that root voles with high thermal responses latency; L signifies that root voles with low thermal responses latency. n = 48 and 48 for H and L groups. Data were expressed as the mean ± SE.
Figure 1 from: Yang Y-G, Shang G-Z, Wu X-Q, Chen H-Q, Wu Y, Cao Y-F, Bian J-H (2021) Effects of parasites and predators on nociception: decreases analgesia reduces overwinter survival in root voles (Rodentia: Cricetidae). Zoologia 38: 1-9. https://doi.org/10.3897/zoologia.38.e67845
Figure 1 Vole nociceptive latencies among the four treatments. N=10, 10, 10 and 10 for the PR+PA+, PR+PA-, PR-PA+ and PR-PA- groups, respectively. Different letters represent significant difference between four treatments (p < 0.05). Data were expressed as the mean ± SE.
Fig. 1A in Isoflavanquinones from Abrus precatorius roots with their antiproliferative and anti-inflammatory effects
Fig. 1A. Structures of compounds 1–6.
Fig. 1B in Isoflavanquinones from Abrus precatorius roots with their antiproliferative and anti-inflammatory effects
Fig. 1B. Structures of compounds 7–11.
Fig. 2 in Isolation, structure elucidation and neuroprotective effects of caffeoylquinic acid derivatives from the roots of Arctium lappa L.
Fig. 2. The key HMBC (1H→13C) correlations of compounds 1–5.
Fig. 1 in Isolation, structure elucidation and neuroprotective effects of caffeoylquinic acid derivatives from the roots of Arctium lappa L.
Fig. 1. Chemical structures of compounds 1–5.
The Effect of Silver Diamine Fluoride (SDF) on Bacteria Involved in Root or Cervical Carious Lesions
ClinicalTrials.gov study NCT02953886. IPD Sharing: NO. Countries: 1. Publications: 0.
The Effect of Using 70% Ethanol Alcohol as a Root Canal Irrigant on Increasing the Success Rate of Metapex in Pulpectomy Compared to Normal Saline in Primary Molars
ClinicalTrials.gov study NCT04669392. IPD Sharing: UNDECIDED. Countries: 0. Publications: 4.
Effect of Resin, Calcium Silicate and Silicone Based Root Canal Sealers on Postoperative Pain
ClinicalTrials.gov study NCT05033093. IPD Sharing: NO. Countries: 0. Publications: 1.
Safety and Effectiveness Study of Maca Root to Treat Antidepressant-Induced Sexual Dysfunction
ClinicalTrials.gov study NCT00181961. IPD Sharing: Not stated. Countries: 1. Publications: 0.
Effects of Irrigation Activation on Clinical Outcomes of Root Canal Treatment
ClinicalTrials.gov study NCT03990584. IPD Sharing: YES. Countries: 1. Publications: 0.
Effect of Conservative Root Canal Instrumentation on the Release of Inflammatory Mediators in Root Canal Treatments
ClinicalTrials.gov study NCT06237985. IPD Sharing: NO. Countries: 0. Publications: 5.
Effect of Injectable Platelet Rich Fibrin Augmented With Vitamin C Compared to Injectable Platelet Rich Fibrin Alone on Healing of Necrotic Mature Single Rooted Teeth With Chronic Peri-apical Periodon
ClinicalTrials.gov study NCT05585359. IPD Sharing: Not stated. Countries: 1. Publications: 0.
The Effect of Sensory Stimulation Threshold on the Efficacy of Pulsed Radiofrequency Applied to the Dorsal Root Ganglion in Patients with Chronic Lumbar Radicular Pain
ClinicalTrials.gov study NCT06756893. IPD Sharing: YES. Countries: 0. Publications: 2.
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International Brain Laboratory public data
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OpenNeuro
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