[Topic 8]: Transport in Plants

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: Transport and from the up to all the of the plant. It also provides to the stem.

**The xylem is supported by .**

: Transport such as (glucose + fructose)from the leaves to other parts of the plant.

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- In a (Please refer to a diagram from the internet) the is on while the is at the .

- In a (Please refer to a diagram from the internet) the is the while the .

- In a (Please refer to a diagram from the internet) the is in the while the is in the .

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- have and to provide for of (e.g nitrate & magnesium) and from the soil.

- are absorbed by from soil into the root hair cells.

- This in the root.

- then into the root hair cell from the soil by .

- This is because the in the soil surrounding the root is than in the cell.

- As the water enters the cell, its water potential becomes higher than in the cell next to it, e.g the .

**The are the cells between the and the .**

- So the water moves by into the next cell. This process is repeated until the water reaches the .

**Osmosis always happen water potential gradient.**

Soil > Root Hair > Root Cortex Cells > Xylem

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- is a way for plants to as evaporation is an (It takes energy from its' surroundings)

- is the from plant leaves by:

of water at the of mesophyll cells

of water vapour through the

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A thin layer of water forms on the surfaces of the mesophyll cells

The water into the in the spongy mesophyll layer

This creates a in the air spaces

Water vapour of the leaf into the surrounding air through the

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Transpiration continuously from the leaf

This at the top of the xylem vessels

This creates a , which pulls water up the xylem vessels

Water molecules have a strong tendency to This is called .

Water loss is quickly replaced by pulling the next water molecule up the xylem vessels

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are taken into the root by

This reduces the inside the root cell, so from the diffuses into the root cells via

As water is constantly (from the surfaces of mesophyll cells) and (out the stomata as there is a higher concentration of water vapour inside the air spaces), there is a pressure created at the top of the xylem (called the )

The makes water travel up the plant

Water molecules also have a tendency to stick together () so as one water molecule is pulled up, another follows

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- Occurs when the is than the

- This means the in the plant keeps on

- Plant cells turn from to

- The leaves , the plant wilts and eventually dies

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> Evaporation and diffusion are at , so the , the

> Diffusion of water vapour of the leaf if the leaf is already surrounded by moist air (This is because the concentration gradient of water vapour between the air spaces inside the leaf and the surroundings is less), so the it is, the

> The stomata to allow more carbon dioxide into the leaf for photosynthesis when light intensity is high, so the , the

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- is the movement of and in the

**The phloem is .**

- The movement is from the regions of (the source) to regions where they are in respiration or growth

**Example of source: Leaves**

- The movement could also be from the source to the regions of (the sinks)

**Examples of sink: Tubers, fruits, roots**

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- Some parts of a plant may act as a source and a sink at during the life of a plant

While a is forming, it would require (sucrose and amino acids, for example), so it would act as a

Once the leaves are , the leaves act as a , and the synthesised sugars and amino acids that they produce will be transported to other parts of the plant

The act as a when the plant is (e.g if its in a dark condition)

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Disclaimer! I cannot guarantee that all the information is correct. I am NOT a professional teacher.

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