IB Biology Topic C3.1.22 Interactions Between Auxin and Cytokinin Revision Notes (HL)

IB Biology Topic C3.1.22 Interactions Between Auxin and Cytokinin Revision Notes (HL) | RevisionDojo

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Auxin and Cytokinin Balance Each Other to Coordinate Root and Shoot Growth

Plants must balance root and shoot growth so they can take up water and nutrients while still photosynthesising.
Two phytohormones coordinate this balance.
1. Auxin is made in shoot tips and travels to the roots.
2. Cytokinin is made in root tips and travels to the shoots.

Each Hormone Signals From One End of the Plant to the Other

Auxin: the shoot-to-root signal
1. It is made mainly in the shoot apical meristem.
2. It moves down to the roots by polar auxin transport.
3. It stimulates root growth, lateral root formation and cell elongation.
4. High auxin in the shoot suppresses lateral buds, maintaining apical dominance.

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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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Auxin and Cytokinin Balance Each Other to Coordinate Root and Shoot Growth

Plants must balance root and shoot growth so they can take up water and nutrients while still photosynthesising.
Two phytohormones coordinate this balance.
1. Auxin is made in shoot tips and travels to the roots.
2. Cytokinin is made in root tips and travels to the shoots.

Each Hormone Signals From One End of the Plant to the Other

Auxin: the shoot-to-root signal
1. It is made mainly in the shoot apical meristem.
2. It moves down to the roots by polar auxin transport.
3. It stimulates root growth, lateral root formation and cell elongation.
4. High auxin in the shoot suppresses lateral buds, maintaining apical dominance.

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

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Excepteur sint occaecat cupidatat non proident

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Sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris.
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A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

IB Biology Topic C3.1.22: Interactions Between Auxin and Cytokinin Notes

A - Unity and Diversity9 subtopics

B - Form and Function10 subtopics

C - Interaction and Interdependence9 subtopics

D - Continuity and Change12 subtopics

Auxin and Cytokinin Balance Each Other to Coordinate Root and Shoot Growth

Each Hormone Signals From One End of the Plant to the Other

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

Auxin and Cytokinin Balance Each Other to Coordinate Root and Shoot Growth

Each Hormone Signals From One End of the Plant to the Other

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