All Germination Science Projects on One Page.

What makes it possible to put all germination science projects on single page is their similarity. Plants are complex organisms. They can be very different as an adult form and have very different lifecycles, sizes and habitats yet they all start life as a seed. So all you need for this kind of project is some seeds, water, soil and a bit of patience.

Project Overview.

First of all it's good to do a bit of research on plant seeds.

You probably know that all seeds of flowering plants are divided into 2 major groups: Monocotyledons or monocots and Dicotyledons or Dicots. If you open up the seed you'll see the difference – embryo of monocots have only single leaf while embryo of dicots have 2 embryo leafs. There are many other important differences which we will not discuss here. 

Seeds of different species store different amounts of nutrients to feed an embryo. Large seeds with lots of food storage usually found among dicots. Depending on our experiment we may choose to use seeds with plenty of food storage. For example if you'd decided to do simple observational project on the root system development you could choose some bean or avocado seed. You could setup them over the glass of water to observe roots growing. That would allow you to take photos or even make a time-lapse movie of the root growth!

Time required for seed germination is another important variable we want to keep in mind. Some species produce shoots faster then another. Time may vary from one-two days to few weeks! So if you time limited or your experiment requires multiple repetitions you may want to choose fastest seeds of them all.

Good model plants for germination science projects are:

At the very first stage of its life seeds are self contained. All they need is a bit of light and water. Within they have all important nutrients to develop. By the way this is the important difference between higher plants and seedless plants like ferns or algae.

However, there much more parameters some of them are subtle that may affect plant germination and even its survival.

Here is the little list of the parameters that you can test in germination science projects:

Try to add some more questions to this list!

So what exectly happens when you plant seeds in the wet soil?

Plant embryo lives in anabiosis state. In this state all life processes are almost stopped. Cells of embryo do not grow or divide. There is almost no breathing. Embryo spend almost no energy. Time stopped for it. Seed is like a starship with hybernated astronaut flying to some distant star.

Most of the seeds have an internal anti-alarm-clock program that force them spend certain time (few weeks or even months) sleeping until germination process can be turned on. This program is very important – it helps plants to survive hostile seasons.

When time comes usually water and temperature starts germination process. Seed starship arrived to its destination.

Seed coat (outer layer of the seed) becomes transparent for the water. Water fills the embryo cells bringing it back to life, turning on chains of enzyme reactions in the cells and dissolving nutrients in the endosperm, making them available for the embryo.

Seed grows in volume. The root comes out and anchor it in the soil. Then embryo leaf(s) appear and for some time embryo grows feeding mostly on the endosperm. Then root system develops and first real leaves appear.

Materials.

For most of germination science projects you may need:

This is basic materials that you will need for most of the experiments. For some experiments you'll need more tools/materials. Check experiment links for specific information.

Basic Experiment Setup

All germination experiments have fairly similar setup.

When experiment is done?

Well, that's up to you to decide and may depend on the experiment goals. In most cases we would suggest experiment complete when 50% of the sprouts in the control group will achieve certain length of root or leafs. Note this condition is only our suggestion, and may depend on the type of the experiment. For example it probably would not be valid if you compare germination of two different species.

Experiment example