Coordination & Response in Plants

Front

What are auxins?

Back

Hormones that regulate plant growth.

Front

Where are auxins produced?

Back

In the tips of actively growing roots and shoots.

Front

What is gravitropism?

Back

Growth response to gravity.

Front

What is phototropism?

Back

Growth response to light.

Front

What process do auxins stimulate that is crucial for growth?

Back

Cell enlargement.

Front

How do auxins affect plant growth in response to light?

Back

They migrate towards the shaded side, causing elongation on that side.

Front

What happens to auxins when a plant shoot grows horizontally?

Back

They accumulate on the lower side due to gravity.

Front

What is the result of auxin accumulation on the lower side of a horizontally growing shoot?

Back

The shoot bends upwards.

Front

What do experiments with coleoptiles demonstrate about auxins?

Back

They illustrate auxin's role in growth responses to light and gravity.

Front

What occurs in Experiment A with coleoptiles?

Back

Coleoptile grows taller without bending.