A: If a plant is kept horizontally,auxin accu | vedclass

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(A) When a plant is placed horizontally,the gravity-sensing organelles known as statoliths (starch-filled amyloplasts) settle at the lower side of the

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

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(A) When a plant is placed horizontally,the gravity-sensing organelles known as statoliths (starch-filled amyloplasts) settle at the lower side of the cells due to gravity.This displacement of statoliths triggers a signaling pathway that causes the redistribution of the plant hormone auxin.Consequently,auxin accumulates on the lower surface of the stem or root,leading to differential growth (gravitropism).Therefore,both the Assertion and the Reason are correct,and the Reason provides the correct explanation for the phenomenon described in the Assertion.

$A$: If a plant is kept horizontally,auxin accumulates on the lower surface.
$R$: Displacement of statoliths and other cell organelles to the lower surface modifies the translocation pattern of auxin.

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$A$: If a plant is kept horizontally,auxin accumulates on the lower surface.$R$: Displacement of statoliths and other cell organelles to the lower surface modifies the translocation pattern of auxin.