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Photosynthesis Background Resources

For photosynthesis to occur, plants need: · Light energy from the sun · Chlorophyll to absorb light energy · Carbon dioxide from the atmosphere and from respiration in plant cells · Water which is absorbed by the roots and transported to the leaves by the xylem tubes....

Stem Tubers: These are modified stems which serve as food storage. The stem extends into the ground and forms enlarged, swollen structures which we call stem tubers. Stem tubers are used to store nutrients and therefore allow the plant to survive winter as well as other adverse conditions. They also serve as a mean of asexual reproduction as new plants develop from these stem tubers. An example of a stem tuber is a potato.

How do plants make food (photosynthesis basics)?

How does light intensity and duration affect plant growth?

Photosynthesis consists of light-dependent and light-independent reactions.

When photosynthesis takes place, plants use the suns energy to combine carbon dioxide from the air with water from the soil to create glucose (a carbohydrate)....

This was done by separating the photosynthetic pigments (chlorophyll a, chlorophyll b, carotene and xanthophylls) from one another using paper chromatography.

Photosynthesis Background Resources

The picture to the left is an example of an excellent compromise for cost and still have very good PUR/PAR planted Aquarium light output.
This 55 gallon aquarium has two GroBeam 600 Ultimas along with two T2 6400K 13 Watt Fixtures. As you can see the plant growth and light output are excellent.


In this experiment we were told that we would be measuring the rate of photosynthesis.

The action spectrum of photosynthesis is a graph showing the rate of photosynthesis for each wavelength of light. The rate of photosynthesis will not be the same for every wavelength of light. The rate of photosynthesis is the least with green-yellow light (525 nm-625 nm). Red-orange light (625nm-700nm) shows a good rate of photosynthesis however the best rate of photosynthesis is seen with violet-blue light (400nm-525nm).

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They do this by a process called Photosynthesis.


Effect of different colors of light on the rate of photosynthesis.

The Relationships in between
Cellular Respiration and
Photosynthesis
By Jack Ellrodt With both proscesses occuring at the same time
all the time the creation and removal of oxygen and carbon dioxide is constant.

This is called photosynthesis, which means "making through light".

However a heterotroph must expel carbon dioxide during this proscess.

Cellular respiration is essential to our lives because without is we would need to be photosynthetic or be able to live off the material found in gases or deep at the bottom of the ocean.

The relationship between photosynthesis and respiration.

Light is a very important factor in the rate of photosynthesis, in my project I am going to test that plants do need light in order to photosynthesise.

Photosynthesis Background Resources

Photosynthesis is essential to life because in order for the food chain to even begin or to even have organisms like us human we need autotrophs to help supply enough energy and enough material so that we can make the energy needed so that we may live.

Effects of different colors of light on the photosynthesis rate.

It will be very interesting to see how light will influence the rate of photosynthesis in plants and what will happen if they do not get the required light in order to produce starch .

Can photosynthesis occur at Saturn or Mars?

Furthermore, I predict that if the light intensity increases, the rate of photosynthesis will increase at a proportional rate and more oxygen will be produced and therefore the oxygen levels will increase.

It makes its own food- photosynthesis.

As we can see, there is a close relationship between the action spectrum and absorption spectrum of photosynthesis. There are many different types of photosynthetic pigments which will absorb light best at different wavelengths. However the most abundant photosynthetic pigment in plants is chlorophyll and therefore the rate of photosynthesis will be the greatest at wavelengths of light best absorbed by chlorophyll (400nm-525nm corresponding to violet-blue light). Very little light is absorbed by chlorophyll at wavelengths of light between 525nm and 625 (green-yellow light) so the rate of photosynthesis will be the least within this range. However, there are other pigments that are able to absorb green-yellow light such as carotene. Even though these are present in small amounts they allow a low rate of photosynthesis to occur at wavelengths of light that chlorophyll cannot absorb.

The aim was to show that light is necessary for photosynthesis.

2 Through the two sections of photosynthesis there is
a total biproduct of 1 glucose molecule and 6 oxygen
molecules Purpose The purpose of this prezi is to illustrate the relationship
between the photosynthetic proscess and its products
and the cellular respiration proscess and how the two
relate to each other.

The way they do this is called photosynthesis.

A limiting factor is a factor that controls a process. Light intensity, temperature and carbon dioxide concentration are all factors which can control the rate of photosynthesis. Usually, only one of these factors will be the limiting factor in a plant at a certain time. This is the factor which is the furthest from its optimum level at a particular point in time. If we change the limiting factor the rate of photosynthesis will change but changes to the other factors will have no effect on the rate. If the levels of the limiting factor increase so that this factor is no longer the furthest from its optimum level, the limiting factor will change to the factor which is at that point in time, the furthest from its optimum level. For example, at night the limiting factor is likely to be the light intensity as this will be the furthest from its optimum level. During the day, the limiting factor is likely to switch to the temperature or the carbon dioxide concentration as the light intensity increases.

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