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Plant Leaves: Expanded structures, usually green, of vascular plants, characteristically consisting of a bladelike expansion attached to a stem, and functioning as the principal organ of photosynthesis and transpiration. (American Heritage Dictionary, 2d ed)
 Science Education: Essentials of Environmental Science

Tree Identification: How To Use a Dichotomous Key

JoVE Science Education

Source: Laboratories of Margaret Workman and Kimberly Frye - Depaul University

A dichotomous key is a tool that identifies items in nature, such as leaves. This method is based on the idea of choosing between two characteristics. The word dichotomous comes from two Greek words that mean “to divide into two parts.” In a dichotomous key for leaf identification, each pair of phrases describes different features of the leaf. Only one of the phrases correctly applies to the leaf being keyed out. The correct phrase leads to the next pair of phrases, or states the name of the tree from which the leaf came. Using a field guide to trees and the iTree National Tree Benefits Calculator helps to identify trees in a field investigation, which shows the significance of trees in terms of their environmental benefits, such as storm water management, increasing property value, energy efficiency, air quality, and carbon sequestration.

 JoVE Environment

Application of Two-spotted Spider Mite Tetranychus urticae for Plant-pest Interaction Studies

1Department of Biology, The University of Western Ontario, 2Instituto de Ciencias de la Vid y el Vino, 3Department of Crop Protection, Ghent University, 4Institute for Biodiversity and Ecosystem Dynamics, University of Amsterdam

JoVE 51738

 JoVE Genetics

The Use of Induced Somatic Sector Analysis (ISSA) for Studying Genes and Promoters Involved in Wood Formation and Secondary Stem Development

1School of Ecosystem and Forest Sciences, Faculty of Science, The University of Melbourne, 2Victorian AgriBiosciences Centre, La Trobe University R&D Park, 3College of Biological Sciences, Department of Plant Biology, University of California, Davis, 4Department of Genetics, Forestry and Agricultural Biotechnology Institute (FABI), University of Pretoria

JoVE 54553

 JoVE Biology

Using High Resolution Computed Tomography to Visualize the Three Dimensional Structure and Function of Plant Vasculature

1U.S. Department of Agriculture, 2Department of Viticulture and Enology, University of California - Davis, 3Hawkesbury Institute for the Environment, University of Western Sydney, 4Advanced Light Source, Lawrence Berkeley National Lab, 5Citrus Research & Education Center, University of Florida

JoVE 50162

 JoVE Biology

An Easy Method for Plant Polysome Profiling

1Laboratoire de Génétique et Biophysique des Plantes, Aix-Marseille Université, 2UMR 7265 Biologie Végétale & Microbiologie Environnementales, CNRS, 3BIAM, CEA, 4Department of Biology, Biocenter, University of Copenhagen, 5Laboratoire de Chimie Bactérienne, 6CNRS, LCB UMR 7283, Aix Marseille Université

JoVE 54231

 JoVE Biology

Measuring Spatial and Temporal Ca2+ Signals in Arabidopsis Plants

1Department of Horticulture and Landscape Architecture, Purdue University, 2Bindley Bioscience Center, Purdue University, 3Institute of Biotechnology, Jiangsu Academy of Agricultural Sciences, 4College of Environmental & Resource Science, Zhejiang University, 5Dryland Agriculture Research Centre, Shanxi Academy of Agricultural Sciences, 6Shanghai Center for Plant Stress Biology, Chinese Academy of Sciences

JoVE 51945

 JoVE Environment

Transcript and Metabolite Profiling for the Evaluation of Tobacco Tree and Poplar as Feedstock for the Bio-based Industry

1Max Planck Institute for Molecular Plant Physiology, 2School of Biological Sciences, Plant Molecular Science, Centre for Systems and Synthetic Biology, Royal Holloway, University of London, 3Department of Plant Systems Biology, VIB, 4Department of Plant Biotechnology and Bioinformatics, UGhent, 5Institute for Building Materials, ETH Zurich, 6Applied Wood Materials, EMPA, 7Division of Glycoscience, School of Biotechnology, AlbaNova University Center, Royal Institute of Technology (KTH), 8European Research and Project Office GmbH, 9ABBA Gaia S.L., 10Pflanzenöltechnologie, 11Capax Environmental Services, 12Green Fuels, 13Neutral Consulting Ltd, 14Plant Cell Biology Research Centre, School of Botany, University of Melbourne

JoVE 51393

 JoVE Immunology and Infection

Fluorescence in situ Hybridizations (FISH) for the Localization of Viruses and Endosymbiotic Bacteria in Plant and Insect Tissues

1Department of Entomology, Volcani Center, 2Institute of Plant Sciences and Genetics in Agriculture, Robert H. Smith Faculty of Agriculture, Food and Environment, Hebrew University of Jerusalem, 3Department of Applied Sciences, Institute for Adriatic Crops and Karst Reclamation, 4The Institute of Plant Sciences, Volcani Center

JoVE 51030

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