Multiple Choice
Seeds of many desert plants will not germinate until a heavy rain washes away their __________.
37. Plant Sensation and Response
Tropisms and Hormones
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The synthesis and release of abscisic acid in a plant is a response to __________.
A
oxygen deprivation
B
salt stress
C
heat stress
D
herbivory
E
water deficit
Verified step by step guidance1
Understand the role of abscisic acid (ABA) in plants: Abscisic acid is a plant hormone that plays a crucial role in regulating plant responses to environmental stress, particularly water deficit.
Identify the types of stress that can affect plants: Plants can experience various types of stress, including oxygen deprivation, salt stress, heat stress, herbivory, and water deficit.
Focus on water deficit: Water deficit, or drought stress, triggers the synthesis and release of abscisic acid in plants. This hormone helps the plant conserve water by closing stomata, reducing water loss through transpiration.
Consider the physiological response: When a plant experiences water deficit, abscisic acid accumulates and signals the plant to adapt by altering growth patterns and physiological processes to survive the stress.
Relate abscisic acid to other stress factors: While abscisic acid is primarily associated with water deficit, it can also play roles in other stress responses, but its main function is to help plants cope with drought conditions.
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