Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 37.2, Problem 1SB
Summary Introduction

To review:

The general and the specific chemical defenses of plants that are activated in response to a particular type of pathogen.

Introduction:

Unlike animals, the plants lack a proper immune system. However, they have evolved interesting mechanisms in order to combat the pathogenic attacks. Plants have the constitutive defense or barriers like bark, waxy coating, spines, hair, and chemicals that are produced in response to the pathogens. The bark and hair are similar to the animal skin. Secondary metabolites like alkaloids are produced in plants to kill the foreign bacterial cells.

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4 types of plant defenses are shown (a, b, c, d) in the figure below. Explain two of the depicted defenses using the terms (constitutive OR induced) and (physical OR chemical) (ie. letter e shows an example of a constitutive chemical response to deter organisms from eating it)
What are the two general ways by which plant pathogens gain entry into the host plant tissue? What are the advantages and disadvantages of each mechanism?
Which of the following are examples of indirect chemical defenses? (Select all that apply). Extrafloral nectar Toxins Trichomes Compounds that make the plant taste bad Volatile organic compounds (VOCs)
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