IB Biology Topic D2.3.4 Changes Due to Water Movement in Plant Tissue Revision Notes (SL/HL)

IB Biology Topic D2.3.4 Changes Due to Water Movement in Plant Tissue Revision Notes (SL/HL) | RevisionDojo

Written by official IB examiners

Water Movement Changes a Plant Tissue's Mass and Firmness

When plant tissue is placed in a solution, water flows in or out of the cells.
This changes the tissue's mass, length, and firmness.

Hypotonic Solutions: Water Moves In and Tissue Becomes Turgid

Definition

Hypotonic

A solution with a lower solute concentration compared to another solution.

In a hypotonic solution, water moves into the cells by osmosis because the solution has a higher water potential than the cytoplasm.
The cells swell and become turgid.

Definition

Turgid

Turgid refers to a plant cell that is swollen with water, causing the cell membrane to press tightly against the cell wall.

Effects on the Tissue

Increased mass and length: the tissue gains water, so its mass and sometimes its length increase.
Firmness: the turgid cells make the tissue firm and rigid.

Tip

Turgidity keeps non-woody plants standing upright and their leaves firm.

Hypertonic Solutions: Water Moves Out and Tissue Wilts

Definition

Hypertonic

A solution with a higher solute concentration compared to another solution.

In a hypertonic solution, water moves out of the cells by osmosis because the solution has a lower water potential than the cytoplasm.
The cells lose water and become plasmolysed.

Definition

Plasmolysis

Plasmolysis is the process where the cell membrane pulls away from the cell wall due to water loss.

Effects on the Tissue

Decreased mass and length: the tissue loses water, so its mass and sometimes its length decrease.

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Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

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Water Movement Changes a Plant Tissue's Mass and Firmness

When plant tissue is placed in a solution, water flows in or out of the cells.
This changes the tissue's mass, length, and firmness.

Hypotonic Solutions: Water Moves In and Tissue Becomes Turgid

Definition

Hypotonic

A solution with a lower solute concentration compared to another solution.

In a hypotonic solution, water moves into the cells by osmosis because the solution has a higher water potential than the cytoplasm.
The cells swell and become turgid.

Definition

Turgid

Turgid refers to a plant cell that is swollen with water, causing the cell membrane to press tightly against the cell wall.

Effects on the Tissue

Increased mass and length: the tissue gains water, so its mass and sometimes its length increase.
Firmness: the turgid cells make the tissue firm and rigid.

Tip

Turgidity keeps non-woody plants standing upright and their leaves firm.

Hypertonic Solutions: Water Moves Out and Tissue Wilts

Definition

Hypertonic

A solution with a higher solute concentration compared to another solution.

In a hypertonic solution, water moves out of the cells by osmosis because the solution has a lower water potential than the cytoplasm.
The cells lose water and become plasmolysed.

Definition

Plasmolysis

Plasmolysis is the process where the cell membrane pulls away from the cell wall due to water loss.

Effects on the Tissue

Decreased mass and length: the tissue loses water, so its mass and sometimes its length decrease.

Definition

Paywall

(on a website) an arrangement whereby access is restricted to users who have paid to subscribe to the site.

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Note

Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam quis nostrud exercitation.

Excepteur sint occaecat cupidatat non proident

Tip

Lorem ipsum dolor sit amet, consectetur adipiscing elit.
Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
Duis aute irure dolor in reprehenderit in voluptate velit esse cillum.

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic D2.3.4: Changes Due to Water Movement in Plant Tissue Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Water Movement Changes a Plant Tissue's Mass and Firmness

Hypotonic Solutions: Water Moves In and Tissue Becomes Turgid

Effects on the Tissue

Hypertonic Solutions: Water Moves Out and Tissue Wilts

Effects on the Tissue

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

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Water Movement Changes a Plant Tissue's Mass and Firmness

Hypotonic Solutions: Water Moves In and Tissue Becomes Turgid

Effects on the Tissue

Hypertonic Solutions: Water Moves Out and Tissue Wilts

Effects on the Tissue

anim nostrud sit dolore minim proident quis fugiat velit et eiusmod nulla quis nulla mollit dolor sunt culpa aliqua

Duis aute irure dolor in reprehenderit

Excepteur sint occaecat cupidatat non proident

Unlock the rest of this chapter with a free account