Anatomy of flowering plants

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    In point 7, it is written that thickening is not so prominent due to presence of casparian strips. How is it possible? Thickening is formed due to casparian strips. Please explain.

    Why is thickening of monocot root more prominent?

  • @anag Casparian Layer is a water impervious layer there's no such thing that there is thickening because of it it's just a layer.

  • @anag
    Unlike most monocots, palm stems can grow in girth by an increase in the number of parenchyma cells and vascular bundles. This primary growth is due to a region of actively dividing meristematic cells called the "primary thickening meristem" that surrounds the apical meristem at the tip of a stem.
    The Casparian strip is a ring-like thickening of certain parts of the endodermal cell walls in plant roots, which forces water and dissolved minerals to pass through the semipermeable plasma membrane of these cells, rather than their cell walls

  • @sunitasaxena Why is thickening of dicot root less prominent? Due to absence of primary thickening meristem? Please explain.

  • @anag
    In many vascular plants, secondary growth is the result of the activity of the two lateral meristems, the cork cambium and vascular cambium. Arising from lateral meristems, secondary growth increases the girth of the plant root or stem, rather than its length.

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