Lesson: Plant Hormones Biology • Second Year of Secondary School

In this lesson, we will learn how to outline the roles of different plant hormones and describe simple experiments to investigate them.

Lesson Plan

Students will be able to

outline the role of auxins in cell elongation and apical dominance, using IAA as an example,
outline the role of gibberellins in germination and stem elongation,
outline the role of ABA in stomatal closure,
describe simple practical investigations into the effect of hormones on plant growth,
analyze the experiments performed by Boysen-Jensen and Went to demonstrate the effect of auxins (IAA) on phototropism in shoots.