Investigating the effect of changing the concentration of auxin on the formation of roots in willow shoots.

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Coursework – Auxins and Root Growth

Investigating the effect of changing the concentration of auxin on the formation of roots in willow shoots.

Introduction

Background:

I have to find out the effect of changing the level of auxin concentration on the formation of willow shoots. This will include taking cuttings and planting them in compost and recording how much they grow. The cuttings will be fed on an auxin solution of a maximum of 0.001%. Shops, to reduce their costs of supplying plants to the public, commercially use this technique.

Hypothesis:

The higher level of concentration of the auxin solution, the higher the level of growth rate that will occur.

Prediction:

I think that the higher the concentration of the auxin, the more the plant cuttings will grow in a certain period of time because auxin is a plant hormone which controls how much the plant will grow and in which direction the plant will grow.

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I think that the shape of the graph with the end results will have a steady rising. I will not use concentrations that are too high because this will inhibit the plants growth and eventually will kill the plant. Before the auxin inhibits growth, it stops the development of the lateral bud. This will make the plant bush out and produce more branches and fruit before it dies. This is not what I want so I will use a relatively weak concentration with the highest being 0.001% as given.

The overall shape of the final results will be a positive ...

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