Chapter 12 – Temperature Stress

Introduction

Temperature stress refers to mild or extreme increases or decreases in temperature, that disrupt cellular and organismal function. As the impacts of global warming become increasingly apparent, cells will be exposed to more frequent and severe temperature stress. Figure 12.1 shows that the earth’s surface temperature is increasing in most areas, especially in the north (including Canada). While more severe heat stress may be an obvious result of global warming, it is noteworthy that cold stress may also become more severe for certain organisms. For example, snow insulates the environment below it, where many organisms live during winter. As snow and ice melt due to global warming, organisms may be exposed to colder temperatures. Understanding how cells are affected by hot and cold temperature stress is important so we can predict the consequences of global warming on organisms and biological processes.

Chapter Outline

12.1 Challenges Associated with Temperature Stress

12.2 Sensing Temperature Stress

12.3 Strategies and Mechanisms of Temperature Stress Tolerance