Which control mechanism is not used to control the transport of nutrients into plant cells?

Question

Quizplus · Accepted Answer

The control mechanisms for the transport of nutrients into plant cells include transcriptional control of transporter genes, phosphorylation of transporter proteins, having multiple genes for transporters for various ions, and having specific transporters for each type of ion. Decreasing the number of ion transporters in low ion conditions is not a mechanism used to control nutrient transport into plant cells; instead, plants typically adjust the activity or expression levels of existing transporters.

Which Control Mechanism Is Not Used to Control the Transport