AUXIN and elogantion growth

Auxin are synthesised in the growing tips of shoots where cells divide. From here is is transported back down the shoot or up the root by active transport. .

At its actions sight the auxin causes H+ ions to be pumped out by proton pumps in the membrane. This acidified the cell membrane causin a loss ending of the cellulose microfibirls of the cell mall. This loosening allows water to osmosise in. The strength of the cell Sall is not compromised, but the cell is allowed to stretch and elongate. 🤗🤶🏿

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