9.1 Transport systems in dicotyledonous plants

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What is a low power plan?

a scientific drawing that shows structures in proportion but with no cellular detail

How are the xylem vessels and phloem tissues arranged in the root of a dicot plant?

there is a central core of xylem vessel in an X-shape, with phloem tissue between the arms of the X-shape

Describe the cells surrounding the vascular bundle in a root and their function

There are meristem cells (that differentiate to xylem and phloem) called the pericycle, and surrounding this is the endodermis, which regulates water movement into the xylem vessels

How is the arrangement of vascular bundles in roots structurally advantageous?

it provides strength to withstand the pulling forces to which the roots are exposed when the stem is blown in the wind

Where are vascular bundles found in stems of dicot plants and why?

on the outer edge of the stem for structural support

Describe the arrangement of cells and tissue in vascular bundles in stems

• xylem vessel - inside of vascular bundle

• phloem tissue - outside of vascular bundle

• cambium - in between xylem and phloem

• fibrous cap - on outside

What is cambium?

meristem cells found in vascular bundles in stems

What is the purpose of vascular bundles in the stem having a fibrous cap?

protection

True or false? xylem vessels in roots have larger lumens than xylem vessels in stems

false - the lumen is wider in stems