Chapter 38.4, Problem 3LO

Summary Introduction

To define: Systemic acquired resistance.

Introduction: Plants are attacked by many factors, such as bacteria, fungi, animals, protists, and so on. Several defence mechanisms occur in plants, which block or decrease the infection. The first line of defence is thick cell walls that are covered with a resilient cuticle. The second line of defence is chemicals secreted by plants, The second line of defense is chemicals secreted by plants that does not cause any harm to their closely related species.