Homeostasis & ResponseStudy Notes

Commercial Uses of Plant Hormones

Part of Plant Hormones — GCSE Biology

This study notes covers Commercial Uses of Plant Hormones within Plant Hormones for GCSE Biology. Topic 11: Plant Hormones It is section 3 of 11 in this topic. Use this study notes to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 3 of 11

Practice

15 questions

Recall

20 flashcards

📌 Commercial Uses of Plant Hormones

Auxins: Weed killers (make weeds grow too fast), rooting powder
Ethene: Ripens fruit (bananas picked green, ripened with ethene)
Gibberellins: Promote seed germination, increase fruit size

Visual: Plant Hormones & Tropisms

Plant hormones diagram showing phototropism (response to light), gravitropism (response to gravity), how auxin controls growth in shoots and roots, and commercial uses of auxins, ethene, gibberellins and cytokinins.

Remember: Auxin in SHOOTS: more = more growth | Auxin in ROOTS: more = less growth | This explains tropisms!

Keep building this topic

Read this section alongside the surrounding pages in Plant Hormones. That gives you the full topic sequence instead of a single isolated revision point.

Auxin — How It Works How It Works: Auxin and Phototropism Tropisms — Plant Responses to Stimuli Key Definitions

Practice Questions for Plant Hormones

When a plant shoot is lit from one side, where does auxin accumulate?

A. On the side facing the light
B. Equally on both sides
C. On the shaded side, away from the light
D. At the base of the shoot

1 markfoundation

Explain how auxin causes gravitropism (geotropism) in plant roots.

3 marksstandard

Quick Recall Flashcards

What are plant hormones?

Chemical substances that control various aspects of plant growth, development, and responses to environmental stimuli.

How does phototropism work?

Auxin concentrates on the darker side of the plant, causing cells there to elongate more, bending the plant stem toward the light source.

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Auxin — How It Works

How It Works: Auxin and Phototropism