Assertion : Water and mineral uptake by root | vedclass

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(A) The movement of water through the root occurs via two pathways: the apoplast and the symplast. The apoplast is the system of adjacent cell walls t

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If both Assertion and Reason are correct and the Reason is a correct explanation of the Assertion.

Vedclass · Answer

(A) The movement of water through the root occurs via two pathways: the apoplast and the symplast. The apoplast is the system of adjacent cell walls that is continuous throughout the plant,except at the casparian strips of the endodermis in the roots. Water and minerals move through the apoplast until they reach the endodermis. The endodermis is impervious to water because of a band of suberized matrix called the casparian strip. Because the apoplastic pathway is blocked at the endodermis by these suberized strips,water is forced to enter the symplast pathway to cross the endodermis. Therefore,both the assertion and the reason are correct,and the reason correctly explains why the apoplastic pathway is interrupted at the endodermis.

Assertion : Water and mineral uptake by root hairs from the soil occurs through apoplast until it reaches endodermis.
Reason : Casparian strips in endodermis are suberized

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Assertion : Water and mineral uptake by root hairs from the soil occurs through apoplast until it reaches endodermis.Reason : Casparian strips in endodermis are suberized