Study Guide for Campbell Biology
Study Guide for Campbell Biology
11th Edition
ISBN: 9780134443775
Author: Lisa A. Urry, Michael L. Cain, Steven A. Wasserman, Peter V. Minorsky, Jane B. Reece, Martha R. Taylor, Michael A. Pollock
Publisher: PEARSON
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Chapter 39, Problem 7TYKT
Summary Introduction

To examine: Whether pathogen-associated molecular patterns (PAMP)-triggered immunity involves the recognition by a toll-like receptor of a pathogen’s specific effector proteins and the triggering of hypersensitive response and systemic acquired resistance or not.

Concept introduction: The hypersensitive response is a characteristic of resistance among several kinds of incompatible interactions that take place between a pathogen and plant. Though an avirulent pathogen enters into the cells of a resistant plant, a complex cascade of signaling occurs. These events result in the death of plant cells at the infection site, so that the pathogen that has penetrated would perish.

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Toll-like receptors represent an ancient pathogen-recognition system. The first pattern recognition receptor (PRR) important in innate immune responses was discovered in the fruit fly Drosophila melanogaster. Stimulation of this receptor, called Toll, induces: The synthesis of prostaglandins and leukotrienes The inflammatory response in Drosophila hemolymph vessels The production of antimicrobial peptides The recruitment of phagocytic cells to the site of infection The activation of Drosophila complement
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