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Absorción Foliar
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Esta animación describe cómo se absorben los herbicidas por las hojas, e ...

Esta animación describe cómo se absorben los herbicidas por las hojas, e ilustra cómo sus características físico-químicas alteran su movimiento a través de la cutícula. También se muestran mecanismos pasivos y activos de la absorción de los herbicidas a través de las membranas de las plantas.

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Life Science
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Lesson
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Advanced Backcross Breeding
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This lesson is a detailed explanation of the backcross breeding process. Variations ...

This lesson is a detailed explanation of the backcross breeding process. Variations based on whether backcrossing is performed with dominant, recessive, or multiple traits are discussed. Calculations associated with backcross breeding are explained.

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Life Science
Material Type:
Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Analysis of Augmented Block Design Using R Part 1: An Introduction to an Augmented Design Approach in Plant Breeding
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Ashu GuruUniversity of Nebraska Raikes SchoolDeana Namuth-CovertUniversity of Nebraska Dept of Agronomy ...

Ashu GuruUniversity of Nebraska Raikes SchoolDeana Namuth-CovertUniversity of Nebraska Dept of Agronomy and Horticulture2014When planning any science research project to gain information for a particular goal or objective, much thought is placed into what is called the experimental design or layout of the experiment. This is important to ensure the researcher is able to obtain useful data which can later be analyzed and provide information as to whether or not the scientific hypothesis being tested is supported or rejected.  In this eLesson series we will look at a plant breeding experiment which uses the Augmented Design and utilize tools in R to analyze the data.   

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Life Science
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Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Analysis of Augmented Block Design Using R Part 2: Analyzing Treatments as Fixed Effects
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Ashu GuruUniversity of Nebraska Raikes SchoolDeana Namuth-CovertUniversity of Nebraska Dept of Agronomy ...

Ashu GuruUniversity of Nebraska Raikes SchoolDeana Namuth-CovertUniversity of Nebraska Dept of Agronomy and Horticulture2014When planning any science research project to gain information for a particular goal or objective, much thought is placed into what is called the experimental design or layout of the experiment. This is important to ensure the researcher is able to obtain useful data which can later be analyzed and provide information as to whether or not the scientific hypothesis being tested is supported or rejected.  In this eLesson series, we will look at a plant breeding experiment which uses the Augmented Design and utilize tools in R to analyze the data.   

Subject:
Life Science
Material Type:
Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Analysis of Augmented Block Design Using R Part 3: Analyzing Treatments as Random Effects
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Ashu GuruUniversity of Nebraska Raikes SchoolDeana Namuth-CovertUniversity of Nebraska Dept of Agronomy ...

Ashu GuruUniversity of Nebraska Raikes SchoolDeana Namuth-CovertUniversity of Nebraska Dept of Agronomy and Horticulture2014When planning any science research project to gain information for a particular goal or objective, much thought is placed into what is called the experimental design or layout of the experiment. This is important to ensure the researcher is able to obtain useful data which can later be analyzed and provide information as to whether or not the scientific hypothesis being tested is supported or rejected.  In this eLesson series we will look at a plant breeding experiment which uses the Augmented Design and utilize tools in R to analyze the data.   

Subject:
Life Science
Material Type:
Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Aparición de resistencia a herbicidas, en una población de malezas
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El uso repetido del mismo herbicida, puede provocar poblaciones de malezas que ...

El uso repetido del mismo herbicida, puede provocar poblaciones de malezas que consisten de biotipos susceptibles (S) que son controlados y biotipos resistentes (R), que escapan al control para producir y retornar semilla con la característica de resistencia, al banco de semillas del suelo. Esta lección se enfocará en la dinámica poblacional de una población de malezas mezclada con biotipos S y R. Se comparará y contrastará la tasa a la que aparecen malezas resistentes en una población bajo diversas presiones de selección. ****** Esta lección se enfocará en la dinámica poblacional de una población mezclada (biotipos susceptibles y resistentes a un herbicida), y comparar y contrastar la tasa a la cual aparece resistencia al herbicida, en una población de malezas mezclada, bajo diversas presiones de selección.

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Life Science
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Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Aplicaciones prácticas de la fisiología de los herbicidas en las plantas
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Esta lección se focaliza en el impacto de las características de la ...

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.

Subject:
Life Science
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Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Appearance of Herbicide Resistance in a Weed Population
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Through the repeated use of the same herbicide, weed populations can consist ...

Through the repeated use of the same herbicide, weed populations can consist of susceptible (S)-biotypes that are controlled and herbicide resistant (R)-biotypes that are left behind to produce and return seed with the resistance characteristic back into the soil. This lesson will highlight the population dynamics of a mixed weed population, containing S- and R-biotypes, and compare and contrast the rate at which herbicide resistant weeds appear in a population under a diversity of selection pressures. This lesson will highlight the population dynamics of a mixed (herbicide susceptible and resistant biotype) weed population, and compare and contrast the rate of appearance of herbicide resistance in a mixed population under a diversity of selection pressures.

Subject:
Life Science
Material Type:
Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Auxin and Auxinic Herbicide Mechanisms of Action
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This animation illustrates how auxins and auxinic herbicides may elicitresponses in plant ...

This animation illustrates how auxins and auxinic herbicides may elicitresponses in plant cells. It describes basipetal transport of auxinsvia influx and efflux carriers and displays a scenario of auxin actionwhere auxin receptors recognize auxins and auxinic herbicides, whichthen induce a signal transduction cascade to turn on various geneproducts. The role of these gene products in plant response is shown aswell.

Subject:
Life Science
Material Type:
Lesson
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 1 - Introduction
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The selective control of broadleaf weeds in cereal grain crops by auxinic ...

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 first organic herbicides developed that were selective or able to kill one group of plants, but not another (i.e. kill broadleaf, but not grass plants). This lesson will introduce the major features of these herbicides, discuss their major uses and describe the symptoms of the injury they cause as well as introduce how they kill sensitive plants.

Subject:
Life Science
Material Type:
Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Auxin and Auxinic Herbicide Mechanism(s) of Action - Part 2 - Advanced
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The selective control of broadleaf weeds in cereal grain crops by auxinic ...

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 thought to act as hormone mimics. This lesson will detail how these herbicides are related structurally and physiologically to the natural plant hormone, auxin (indole-3-acetic acid; IAA) and explain the biochemical mechanisms which may be involved in their action. The mechanism of cell to cell transport and cellular uptake of auxins will be reviewed as well as how they cause cell elongation and induce ethylene biosynthesis. Receptors, signal transduction pathways and changes in gene expression for the natural hormone, IAA, will be described and related their role in auxinic herbicide activity.

Subject:
Life Science
Material Type:
Lesson Plan
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Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary
Backcross Breeding
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How the conventional breeding method of backcross breeding is done.This is the ...

How the conventional breeding method of backcross breeding is done.This is the seventh of a series of seven animations that detail theprocess of crop genetic engineering. To begin at the beginning, see Overview of Crop Genetic Engineering. (To return to the animation previous to this, go to Gene Gun.)

Subject:
Life Science
Material Type:
Lesson
Provider:
Plant and Soil Sciences eLibrary
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Plant and Soil Sciences eLibrary