BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

Solutions

Chapter
Section
BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Which of the following are means by which contact with a specific infectious bacterium or fungus triggers a plant defensive response?

a. A plasma membrane receptor binds to a PAMP.

b. PR proteins begin to break down components of thepathogen cell wall.

c. Systemin binding leads to the synthesis of jasmonate.

d. Resistance proteins bind to bacterial virulence effectors thathave entered a plant cell.

e. Salicylic acid molecules are released from the besieged plantcell.

Summary Introduction

Introduction:

A defense mechanism is presented by plants when they come in contact with a pathogen. This defense mechanism is triggered when the infection-causing pathogen or a substance produced by the pathogen binds with a specific region of the plant. This binding triggers the mechanism that results in actively fighting against the pathogen.

Explanation

Justification/explanation for the correct answer:

Option (a) is, ‘the plasma membrane receptor binds to a PAMP’. The cell membrane of plants has specialized receptors for pattern recognition. These receptors, when exposed to the PAMP (usually have proteins associated with the cell wall or flagellum of pathogens), result in the production of phytoalexins. These phytoalexins are produced because of the signals, which lead to the change in the expression of genes.

Option (d) is, ‘resistance proteins bind to bacterial virulence effectors that have entered a plant cell’. Plants have an effector-triggered immunity that helps in combating bacterial virulence. In this mechanism, R-genes are produced, which are responsible for encoding resistance proteins. These proteins present an immediate defense against the pathogen attacks. Hence, options (a) and (d) are correct...

Still sussing out bartleby?

Check out a sample textbook solution.

See a sample solution

The Solution to Your Study Problems

Bartleby provides explanations to thousands of textbook problems written by our experts, many with advanced degrees!

Get Started

Additional Science Solutions

Find more solutions based on key concepts

Show solutions add

Selective breeding a. involves manipulating an organism's genes in a laboratory. b. has been used for thousands...

Nutrition: Concepts and Controversies - Standalone book (MindTap Course List)

A box with a total surface area of 1.20 m2 and a wall thickness of 4.00 cm is made of an insulating material. A...

Physics for Scientists and Engineers, Technology Update (No access codes included)