Many plants wind up with a Na⁺ concentration that is considerably lower than that of the surrounding soil. What plays a key role in allowing for such a difference to exist?

Question

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The endodermis plays a crucial role in controlling the movement of substances into the plant's vascular system, thereby allowing plants to maintain a different concentration of solutes, such as Na⁺, compared to the surrounding soil.

Many Plants Wind Up with a Na+ Concentration That Is

Many Plants Wind Up with a Na⁺ Concentration That Is