In shoots, auxin activates H+ pumps, lowering cell wall pH and loosening cellulose fibers by breaking bonds. This increases wall elasticity, allowing water influx and cell expansion.
In shoots, auxin activates H+ pumps, lowering cell wall pH and loosening cellulose fibers by breaking bonds. This increases wall elasticity, allowing water influx and cell expansion.
| Front | describe auxin's mechanism of action in shoots |
|---|---|
| Back | auxin activates H+ pump, H+ secreted into cell wall lowering pH, cellulose fibres loosen (bonds break), auxin upregulates the expression of expansins (increase wall elasticity), flexibity allows an influx of water, cell size increases |
Tags: 9_3_plant_growth
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