Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Curvature and Its Interpretation

Curvature and Its Interpretation

Curvature describes how rapidly a curve changes direction at a particular point. A curve with a small curvature bends gently, while a curve with a large curvature turns sharply. For a space curve, the position of a moving object can be described by a vector-valued function r(t), where t often represents time. The direction of motion is determined by the tangent vector, and the unit tangent vector is obtained by normalizing the derivative of the position vector.The unit tangent vector gives the...

Light Acquisition

Light Acquisition

In order to produce glucose, plants need to capture sufficient light energy. Many modern plants have evolved leaves specialized for light acquisition. Leaves can be only millimeters in width or tens of meters wide, depending on the environment. Due to competition for sunlight, evolution has driven the evolution of increasingly larger leaves and taller plants, to avoid shading by their neighbors with contaminant elaboration of root architecture and mechanisms to transport water and nutrients.

Degree of Curvature and Radius of Curvature

Degree of Curvature and Radius of Curvature

The degree of curvature and the radius of curvature are fundamental concepts in determining the sharpness or smoothness of a curve. The degree of curvature is a measure of how steeply a curve bends and can be determined using the chord basis or the arc basis. In the chord basis method, the degree of curvature is defined as the central angle subtended by a chord of 30.48 meters, helping in the calculation of the radius of the curve. The arc basis method defines the degree of curvature as the...

Bending of Curved Members - Strain Analysis

Bending of Curved Members - Strain Analysis

The mechanics of deformation in curved members, such as beams or arches, under bending moments, involve complex responses. When such a member, symmetric about the y-axis and shaped like a segment of a circle centered at point C, is subjected to equal and opposite forces, its curvature and surface lengths change significantly. This alteration results in the shift of the curvature's center from C to C', indicating a tighter curve.
The important part of bending analysis for such a member is the...

Bending of Curved Members - Neutral Surface

Bending of Curved Members - Neutral Surface

In curved beams, unlike straight beams, the stress distribution across the cross-section is not uniform due to the beam's curvature. This non-uniformity arises because the neutral axis, where stress is zero, does not align with the centroid of the section. In a curved beam, the strain varies along the section as a function of the distance from the neutral axis.
Consider the curved member described in the previous lesson. According to Hooke's law, which relates stress to strain within the...

Deformations in a Symmetric Member in Bending

Deformations in a Symmetric Member in Bending

When analyzing the deformation of a symmetric prismatic member subjected to bending by equal and opposite couples, it becomes clear that as the member bends, the originally straight lines on its wider faces curve into circular arcs, with a constant radius centered at a point known as Point C. This phenomenon helps to understand the stress and strain distribution within the member more clearly.
When the member is segmented into tiny cubic elements, it is observed that the primary stress...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Perception, Synaptic Plasticity, and Spiking Neuron Function Enabled by a 2D Ferroelectric NbOBr<sub>2</sub> for Neuromorphic Vision.

Advanced materials (Deerfield Beach, Fla.)·2026

Same authorSame journal

BpMAPK6-mediated phosphorylation of BpDRE1B enhances drought tolerance in Betula platyphylla via activating GST for antioxidant defense.

Journal of experimental botany·2026

Same author

Replacing nitrogen fertilizer with organic alternatives changes the soil microbial community diversity in Northwest China's arid farmland, leading to increased potato yields.

Frontiers in plant science·2026

Same author

Role and mechanism of AOPPs-induced NOX4-mediated ferroptosis in intervertebral disc degeneration.

Scientific reports·2026

Same author

Field Diagnosis of Potato Nitrogen Nutrition Using a Bayesian Critical Nitrogen Dilution Curve and Canopy Spectral Sensing.

Plants (Basel, Switzerland)·2026

Same author

Mapping brain synergy dysfunction in heart failure patients with reduced and mildly reduced ejection fraction using multimodal neuroimaging: Functional and molecular insights.

European journal of radiology·2026

Search research articles

Related Experiment Video

Updated: Jun 13, 2026

LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape Measurement

LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape Measurement

Published on: January 21, 2013

Classification and quantification of leaf curvature.

Zhongyuan Liu¹, Liguo Jia, Yanfei Mao

¹National Key Laboratory of Plant Molecular Genetics, Shanghai Institute of Plant Physiology and Ecology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, Fenglin Road 300, Shanghai, China.

Journal of Experimental Botany

|April 20, 2010

Summary

Researchers developed a new method to quantify leaf curvature in Arabidopsis thaliana mutants. This quantitative measurement (curvature index) helps understand gene function in leaf development and aids in breeding plants for improved photosynthesis and yield.

More Related Videos

Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

Published on: October 25, 2024

Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands

Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands

Published on: August 29, 2019

Related Experiment Videos

Last Updated: Jun 13, 2026

LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape Measurement

LeafJ: An ImageJ Plugin for Semi-automated Leaf Shape Measurement

Published on: January 21, 2013

Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

Reconstructing Terrestrial Paleoclimate and Paleoecology with Fossil Leaves Using Digital Leaf Physiognomy and Leaf Mass Per Area

Published on: October 25, 2024

Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands

Leaf Area Index Estimation Using Three Distinct Methods in Pure Deciduous Stands

Published on: August 29, 2019

Area of Science:

Plant Biology
Developmental Genetics
Quantitative Trait Analysis

Background:

Leaf curvature in Arabidopsis thaliana mutants is linked to defects in polarity, cell division, and auxin response.
Qualitative assessment of leaf curvature hinders precise comparison and gene function elucidation.
A quantitative method is needed to accurately measure and compare leaf curvature across different mutants.

Purpose of the Study:

To develop and validate a novel method for the classification and quantification of leaf curvature in Arabidopsis thaliana.
To establish a quantitative tool for analyzing leaf development and genetic components influencing leaf shape.
To enable comparative analysis of leaf curvature in mutants for better understanding of gene function and allele strength.

Main Methods:

Selection of twenty-two mutant alleles from Arabidopsis mutants and transgenic lines affecting leaf flatness.
Classification of mutants based on direction, axis, position, and extent of leaf curvature.
Development of a curvature index (CI) using global and local leaf measurements for quantification.

Main Results:

The proposed curvature index (CI) effectively quantifies leaf curvature, accounting for direction, axis, position, and extent in Arabidopsis mutants.
CI values revealed spatial and temporal variations in leaf curvature, reflecting mutant allele strength and gene activity.
Quantitative comparison of CI values facilitated understanding of genetic influences on leaf development.

Conclusions:

The developed curvature index provides a quantitative and comparable measure for leaf curvature, even in complex genetic backgrounds.
This tool is valuable for defining genetic components of leaf development and for breeding programs.
Applications include developing varieties with optimized leaf curvature for enhanced sunlight capture, photosynthesis, and yield.