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Dataset results
14 results for “Root length”
Fine root dynamics along an elevational gradient in the southern Appalachian mountains in the Coweeta Hydrologic Laboratory from 1994 to 1995 (lengths of fine root segments)
The lengths of fine root segments visible in photographs of roots growing against the windows of minirhizotron boxes were measured.
Dataset for "Root Length Estimation: Automated Minirhizotron Image Analysis with Convolutional Networks without Segmentation"
<p>This data contains 4015 root images, splitted into 4 datasets, acquired using two minirhizotron (MR) system types - manual (Dataset 1 & Dataset 4) and automated (Dataset 2 & Dataset 3). It includes four crop species (corn, pepper, melon, and tomato) grown under various abiotic stresses. The data was acquired by researchers from Ben-Gurion University of the Negev, Beer Sheva, Israel, and used for research of automated TRL estimation with Convolutional Neural Networks.</p> <p>The annotations were conducted manually using the Rootfly software (Wells and Birchfield, Clemson University, South Carolina, USA), and data were transformed as CSV formats. In this software, the annotator must draw a root by marking points along the selected root. These points usually correspond to the coordinates at the start and the end of the root, and curving points along the root. These points are then connected in a line, the length of which reflects the real length of the selected root. The annotations has been done for all roots within an image, and for all images in the provided dataset.</p> <p>The provided annotations include the total root length (TRL) per image (mm) and the coordinates of annotated points.</p> <p>The annotations are given in two types of files:</p> <p>"TRL.csv" files: contain the image names and corresponding TRL values (mm).</p> <p>"pointsOutput.csv" files: contain the annotated image names and the coordinates of the points of the roots in the image (if the image contains roots) in the form of x1, y1, x2, y2, x3, y3, etc. It the image doesn't have roots, the file contains only its name.</p>
Data from: Root responses to elevated CO2, warming, and irrigation in a semi-arid grassland: integrating biomass, length, and life span in a 5‐year field experiment
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The role of fine‐root mass, specific root length and lifespan in tree performance: a whole‐tree exploration
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Climate change and defoliation interact to affect root length across northern temperate grasslands
<p>1. Grassland plants, especially their root systems, are dynamic and can buffer changes resulting from exposure to multiple stressors; however, the interactive stressor effects on root dynamics and associated aboveground growth are poorly understood.</p> <p>2. Here, we examine the effects of changed precipitation and air temperature, and defoliation intensity on root length dynamics and aboveground biomass using the third year data from a multifactor experiment conducted across three northern temperate grasslands.</p> <p>3. We found that root length was more sensitive to the changes in environmental and management conditions than root mass, demonstrating the importance of root length as an indicator of rapid root system changes. Across all sites, warming, altered precipitation, and defoliation intensity interacted to affect root length while aboveground biomass was only affected by defoliation intensity, indicating that the root system was more responsive than aboveground biomass when climatic conditions change. Overall, drought reduced root length, particularly under low defoliation intensity, as well as in combination with warming and heavy defoliation, highlighting the risk of additive effects of such environmental stresses. Across unclipped plots, aboveground biomass was positively associated with total root length, the latter of which further interacted with precipitation, to affect aboveground biomass. Compared to defoliated communities, non-defoliated plant communities exhibited a greater ability to maintain aboveground biomass under drought conditions via increases in root system efficiency (the amount of aboveground biomass produced per unit of root length invested).</p> <p>4. Our results highlight the rapid change of root length in the face of interactive stressors. We postulate that the degree of stability in aboveground biomass is driven by the altered root system dynamics or species turnover. Future studies are warranted that more directly assess how root length responses under climate change impact other important plant traits in grasslands.</p>
Dataset of Grapevine roots with length, diameter, and color annotations
<p>Data includes 531 annotated images of grapevines roots which were acquired from 40 tubes across a range of depths in the soil profile in the Ramat Negev region, Israel, in August 2012 to December 2013. There were five tubes for each combination of cultivar, irrigation treatment, and tube distance from the trunk. The tubes were 2 m long, with a 6 cm outer diameter and 5.15 cm inner diameter. Data was acquired with manual MR acquisition system using a BTC-2, Bartz Technology Co. (Carpinteria, California, USA) MR camera system with its default settings. The camera was attached to an indexing handle and controlled using a laptop-computer-based image capture system (I-CAP, Bartz Technology Co., Carpentaria, California, USA). The images were taken by an older type of manual MR system, where an image view an area 16.5 × 14 mm<sup>2</sup> at a resolution of 754 × 648 pixels.</p> <p> </p> <p>Additional 132 annotated images corresponding to two different treatment were added.</p> <p>Images were annotated using root-image analysis software Rootfly Version 2.0.2 (Clemson University, South Carolina, USA; <a href="http://www.ces.clemson.edu/~stb/rootfly/">http://www.ces.clemson.edu/~stb/rootfly/</a>).</p>
Data from: Decreased root heterogeneity and increased root length following grassland invasion
1. Plant invasions can be promoted by environmental heterogeneity, but the opposite effect, the impact of plant invasion on heterogeneity, has received little attention. Grassland invasions might contribute to decreased spatial heterogeneity because invaders tend to be larger than native vegetation. Lowered heterogeneity may contribute to the low diversity of invaded communities, as well as to the persistence of invasive populations. 2. We compared the spatial heterogeneity of roots and resources in uninvaded native grassland and in stands invaded by a relatively large exotic grass (Agropyron cristatum), in four combinations of mowing and nitrogen (N) addition. We focused on roots because they account for the majority of primary production in grasslands. 3. The spatial heterogeneity of root length (m root / m2 rhizotron image) and root production was significantly lower beneath A. cristatum than uninvaded grassland. This result was consistent in all combinations of mowing and N addition. 4. Beneath the invader, root length was significantly greater, and the proportion of samples that contained roots was significantly higher. This suggests that the invader decreased spatial heterogeneity by more completely filling the soil volume with roots. 5. Resource heterogeneity varied significantly between vegetation types in just one out of four cases examined, suggesting that invader effects on resource heterogeneity were small relative to its effects on root heterogeneity. 6. These results suggest a novel mechanism promoting invader success and persistence: high root heterogeneity, lower root length, and empty soil volumes in native grassland may make it relatively vulnerable to invasion, while reduced heterogeneity and greater root length in invaded grasslands may sustain stable, low-diversity communities dominated by the invader. Lowered heterogeneity accompanying invasion may partly account for the wide-spread occurrence of low diversity, invader dominated grasslands in North America.
Climate change and defoliation interact to affect root length across northern temperate grasslands
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Data from: Decreased root heterogeneity and increased root length following grassland invasion
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Supporting Data:A pleiotropic 'stretch' phenotype is associated with metaxylem vessel element length, axial hydraulic conductance, root elongation, water utilization, and drought adaptation in maize.
<p>These data were collected to assess how xylem perforation plates affect water use strategies in maize (<em>Zea mays </em>L.) under water deficit through empirical studies in controlled environments and in the field. In this work, our goals were to explore the extent of intraspecific variation for the structure of perforation plates within an annual monocot and assess how this variation affects transport and use of water under drought stress. Specifically, we test the hypotheses that (1) simple perforation plates have a significant effect on water transport, (2) intraspecific variation exists for these features in maize, and (3) this variation affects water use strategies under drought stress. </p>
Data from: Functional correlations between specific leaf area and specific root length along a regional environmental gradient in Inner Mongolia grasslands
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Data from: Diversity effects on root length production and loss in an experimental grassland community
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Accuracy of Electronic Apex Locators ProMark, RootZX II and NRG Rider on Working Length of Multi-rooted Teeth
ClinicalTrials.gov study NCT02521909. IPD Sharing: NO. Countries: 1. Publications: 0.
An Evaluation of Root Length Measurements Using Intraoral Scan and Panoramic Radiographs
ClinicalTrials.gov study NCT02822040. IPD Sharing: NO. Countries: 0. Publications: 0.
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