Learning Objectives - Temperature Stress
Understand the concept of mesophyllic
Know the temperature range over which most plants are adapted
Be able to define chilling-stress temperatures
Understand the role of water in freezing temperature stress
Understand the concept of LD50 as it applies to assessing temperature stress
Name two chilling-sensitive species
Know the interaction of time and temperature on causing temperature stress in plants
Understand the relationship between air, tissue, and soil temperatures
Know the symptoms of heat stress that can occur in plants
Understand how water stress can interact with high temperature stress
Understand heat effects on plant metabolism
Understand heat avoidance and heat tolerance mechanisms in plants
Be able to describe the role of heat-shock proteins in high temperature responses of plants
Describe the direct and indirect effects of chilling on plants
Understand chilling resistance mechanisms in plants
Understand the role of time in acquisition of chilling resistance
Be aware of the lower temperature limit for plant survival and its relationship to tissue water content
Understand the locations of ice formation in plant tissues and their impact on injury
Understand the mechanisms of freezing injury that occur in plant tissues
Know how rate of freezing/thawing influences ice crystal structure and injury
Understand how plants avoid low temperatures to avoid freezing
Understand avoidance and tolerance mechanisms for freezing resistance when plants are exposed to temperatures of 0
° C and lowerKnow several management techniques used to rescue high-value crops from a freezing event
Understand latent heat and its role in freezing tolerance and supercooling
Understand the differences between freezing tolerance and winter hardiness
Know the stresses associated with winter and how plants adapt to them
Understand the processes involved in winter hardening
Know the environmental condition that lead to winter hardening
Understand the cultural/management factors (i.e., fertility, cutting, cultivar selection,...that can alter winter hardening
Understand how to manage winter-injured plants in order to improve their recovery