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Meristematic tissue in plants is mainly characterized by:
Permanent storage cells.
Mature cells with thick walls.
Small, actively dividing cells with thin walls.
Large, highly vacuolated cells.
Small, actively dividing cells with thin walls.
Meristematic tissues consist of undifferentiated, actively dividing cells responsible for plant growth. These cells have thin primary cell walls and dense cytoplasm to facilitate rapid mitosis.
Meristematic tissues consist of undifferentiated, actively dividing cells responsible for plant growth. These cells have thin primary cell walls and dense cytoplasm to facilitate rapid mitosis.
Think of meristematic tissue as the 'stem cells' or 'growth factories' of a plant, similar to how construction workers are clustered at a new building site to actively build new structures.
MAP: Meristems Are Proliferating (or Actively dividing).
N=N0тАЛ├Ч2n тАФ where N is the number of cells after n generations of mitosis.
The principle relies on the cell cycle control. Meristematic cells maintain the ability to undergo mitosis continuously due to their simple structure and lack of large central vacuoles, which would otherwise occupy space and hinder rapid division. Their primary growth is driven by the production of new cells through 2nтЖТ2n+2n division cycles.
Meristematic cells possess prominent nuclei and dense cytoplasm.
They lack intercellular spaces and have minimal vacuolization.
These cells eventually differentiate into permanent tissues like xylem or phloem.
Found in regions like root tips (apical meristem) and cambium (lateral meristem).
Allows indeterminate growth in plants
Enables tissue regeneration and repair
High energy expenditure for rapid cellular division
Growth in plant height (Apical meristem)
Secondary thickening of stems (Lateral meristem/Cambium)
Vacuoles are either absent or very small in meristematic cells to maintain cell density.
Option A and B describe permanent tissues that have lost the power of division.
Option D describes mature parenchyma or older plant cells.
C is correct тАФ Meristematic cells are characterized by small, dense, and rapidly dividing protoplasm enclosed by thin cellulose walls.
Remember that 'Meristem' comes from the Greek word 'meristos', meaning 'divisible'. Any cell described as having a large vacuole is typically a permanent cell, not a dividing one.
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