Science Notebook - Student Edition

(Steven Felgate) #1

Main Idea Details


Plant Structure and Function 233

Plant Hormones
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Plant Responses
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Compare four plant hormones by completing the table below.

Section 22.3 Plant Hormones and Responses (continued)

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Summarize the two types of tropisms in the organizer below.

How This Characteristic Another
Hormone Hormone of This Hormone Benefit of
Regulates Growth This Hormone
Auxin

Gibberellin

Cytokinin

Ethylene

The tropism is if
the plant grows toward the stimulus.

Plants respond to as
they grow toward the.

Stems respond to as they grow against
away from the.

The tropism is if the plant
grows from the stimulus.

Tropism is a change in a plant’s
due to an.
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