Which of the following ion is pulled out in apoplast by the auxin during growth

Options

A. `Na^(+)`
B. `K^(+)`
C. `Mg^(2+)`
D. `H^(+)`

Answer

D

Explanation

Auxin stimulates growth by causing cell elongation. They increase the strictness of the cell wall by promoting active transport of `H^(+)` ion by ATPase. This provides low pH for the expansions enzymes to loosen the wall. The enzymes break down bonds within the cellulose which makes the wall less rigid.