Explain the distribution of mechanical tissue in plants.
- Xylem is centrally distributed in roots to with stand strains as aerial parts bend and lean over
- It is peripheral in a ring in dicot stems and scattered in monocot stems such that separate rods run through to provide more support
- Secondary xylem is added by secondary growth to support large structures of trees and shrubs
- Collenchyma in stems and petiole is peripheral just below the epidermis in the outer region of cortex to increase support.
- Sclerenchyma is distributed according to stress in organs.
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