Transport proteins of which layers of root acts as control points where a plant adjust the quality and types of solutes that reaches the xylem?

Hypodermis

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Pith

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Endodermis

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Pericycle

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Solution

The correct option is A Hypodermis
The endodermis is the innermost layer of cortex and helps regulate the movement of water into the vascular system and also out of it by either the apoplast or the symplast pathway. Therefore, transport proteins of endodermal cells can be said to be the control points, where a plant adjusts the quantity and type of solutes that reach the xylem.
So, the correct option is 'Endodermis'.

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Similar questions

Identify the correct statements related to the uptake of mineral ions

A. The membrane proteins pump ions from soil into the cytoplasm of epidermal cells

B. Transport proteins of endodermal cells act as control points, which adjust the quantity and type of solutes reaching the xylem

C. Root endoderm due to its suberin layer, can not transport ions

Consider the following statements and choose the correct answer.

I. Carrier proteins are needed by both facilitated diffusion and active transport and are sensitive to inhibitors that react with the protein.

II. Different types of proteins present in the membrane play a major role in both active as well as passive transport.

III. The carrier proteins needed by facilitated and active transport are specific.

IV. There is no need of energy to pump molecule against a concentration gradient in active transport.

V. Transport rate reaches the saturation point when all the active proteins are used.

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