Question

anybody pls explain how lignin deposition leads to death???​

Answer 1

Answer:

it depends on whether your plant belongs to monocots or dicots.

Generally, the lignification process starts at dicots, which have Type I cell wall, when the cell commit to switch to programmed cell death (PCD), forming the secondary cell wall to initiate xylem vessels. So, lignin doesn't exist at primary cell wall Type I

On the other hand, in Monocots, which have Type II cell wall, Phenylpropanoid compounds are present at Type II primary cell wall.

However, It might be a few exceptions.

Reference: read the book "Biochemistry & molecular biology of plants", Chapter the cell wall.

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