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Lessons - Herbicide Mode of Action Aplicaciones prácticas de la fisiología de los herbicidas en las plantas Esta lección se focaliza en el impacto de las características de la planta y el herbicida, importantes para determinar el desempeño del herbicida. Se usarán imágenes visuales para ilustrar varios principios, incluyendo el sitio de absorción del herbicida en la planta, transporte, el sitio de acción sensible, y efectos del ambiente sobre el desempeño del herbicida. Esta información provee la base para maximizar la utilidad del uso de los herbicidas. View Print Take Quiz Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 1 - Introduction The selective control of broadleaf weeds in cereal grain crops by auxinic herbicides has made this group one of the most widespread and important herbicide families in use. These herbicides were the f... View Print Take Quiz Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 2 - Advanced The selective control of broadleaf weeds in cereal grain crops by auxinic herbicides has made this group one of the most widespread and important herbicide families in use. These herbicides are thoug... View Print Take Quiz Clasificación de los herbicidas Esta lección se enfoca en entender el sistema de clasificación en el cual están organizados los herbicidas. Terminología como clasificación, jerarquía de clasificación, ejemplos de clasificac... View Print Take Quiz Foliar Absorption and Phloem Translocation Herbicides must be absorbed into plants in order to be effective. Herbicide absorption can occur through leaves, roots or both. The process by which herbicides kill weeds, called mode of actio... View Print Take Quiz Gene Expression Part 2: Expression of Herbicide Resistant ALS Genes in Plants This lesson describes how changes in the DNA sequence of a gene can alter the synthesis of a protein and thus influence traits such as herbicide resistance. View Print Take Quiz Herbicidas que Actúan A través de la Fotosíntesis View Print Take Quiz Herbicide Classification This lesson focuses on understanding the classification system into which herbicides are organized. Terms of classification, classification hierachy, examples of classification and a brief overview ... View Print Take Quiz Herbicide Discovery and Screening Historically, herbicides have been discovered by randomly screening collections of chemicals for activity on target weeds. While totally empirical, this approach has been surprisingly successful and ... View Print Take Quiz Herbicide Resistance: Mechanisms, Inheritance, and Molecular Genetics View Print Take Quiz Herbicides That Act Through Photosynthesis This lesson will examine herbicides that adversely affect light-related processes, thereby causing damage to plants. There are four basic mechanisms that will be studied in this class of agents: her... View Print Take Quiz Inhibidores de la Síntesis de Aminoácidos Aromáticos En esta lección se detallarán los procesos bioquímicos que son afectados por los herbicidas que inhiben la síntesis de aminoácidos en las plantas. Se describirá también la importancia de los am... View Print Take Quiz Inhibitors of Aromatic Amino Acid Biosynthesis This lesson will detail the biochemical mechanisms that are affected by herbicides which inhibit a plant’s ability to synthesize amino acids. The significance of amino acids and proteins will also b... View Print Take Quiz Inhibitors of Branched Chain Amino Acid Biosynthesis View Print Take Quiz Inhibitors of Fatty Acid Synthesis and Elongation Fatty acid synthesis and fatty acid elongation are two parts of a critically important pathway in plants. The endproducts are essential components of cell membranes, waxes, and suberin. Two chemical f... View Print Take Quiz La Interacción de la Luz con las Biomoléculas En esta lección se describe la naturaleza de la luz, la energía de los fotones y como dicha energía puede ser transferida a las biomoléculas. Se describen también tanto los procesos benéficos c... View Print La Transpiración - Movimiento del Agua a Través de las Plantas La transpiración es la pérdida de agua en forma de vapor por las plantas. El agua es absorbida del suelo por las raíces y transportada en forma líquida por el xilema hacia las hojas. En las hojas,... View Print Los Pigmentos Vegetales y la Fotosíntesis En esta lección se examinarán las dos principales clases de pigmentos fotosintéticos: las clorofilas y los carotenoides. Se analizarán sus estructuras bioquímicas y su biosíntesis, y se explica... View Print Mecanismo(s) de Acción de las Auxinas y los Herbicidas Auxínicos - Parte 1- Introducción Descripción: El control selectivo de malezas de hoja ancha en cultivos de cereales utilizando herbicidas auxínicos ha hecho de éstos una de las familias de herbicidas actualmente en uso más amp... View Print Mecanismo(s) de Acción de los Herbicidas Auxínicos - Parte 2 - Nivel Avanzado Descripción: El control selectivo de malezas de hoja ancha en cultivos de cereales por los herbicidas auxínicos ha hecho de éstos una de las familias de herbicidas actualmente en uso mas ampliam... View Print Metabolism of Herbicides or Xenobiotics in Plants This lesson will take an indepth view of how plants handle foreign chemicals (xenobiotics) such as herbicides. It will discuss the three main phases that plants use to handle toxic chemicals, which en... View Print Take Quiz Plant Pigments and Photosynthesis This lesson will examine the two major classes of phototsynthetic pigments, chlorophylls and carotenoids, their biochemical structures and their biosynthesis. The organization of these pigments into ... View Print Take Quiz Practical Applications of Herbicide Physiology This lesson will focus on the impact of herbicide and plant characteristics important in determining herbicide performance. Visual images will be used to illustrate several principles including herbic... View Print Take Quiz Root Absorption and Xylem Translocation Overview: Herbicides must be absorbed into plants in order to be effective. Plant roots and below ground shoots have few barriers to herbicide absorption; however, interactions with soil particles ... View Print Take Quiz The Interaction of Light with Biological Molecules This lesson describes the nature of light, the energy within photons and how this energy may be transferred to biological molecules. In addition, the beneficial and harmful methods for de-exciting mo... View Print Take Quiz Total: 25

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This project was supported in part by the National Research Initiative Competitive Grants CAP project 2011-68002-30029 from the USDA National Institute of Food and Agriculture, adminstered by the University of California-Davis and by the National Science Foundation (NSF), Division of Undergraduate Education, National SMETE Digital Library Program, Award #0938034, administered by the University of Nebraska. Any opinions, findings, conclusions or recommendations expressed in this publication are those of the author(s) and do not necessarily reflect the views of the USDA or NSF.
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