Table of Contents
Where are the xylem and phloem found in herbaceous stems?
vascular bundles
The herbaceous stem is composed of vascular bundles (xylem and phloem) arranged in a circle around a central core of spongy tissue made up of parenchyma cells, called the pith. Surrounding the vascular bundles is a layer known as the cortex, which varies in thickness from species to species.
How can you differentiate between xylem and phloem in an herbaceous stem?
Xylem is a vascular tissue that transports water and dissolved minerals absorbed from the roots to the rest of the plant. Phloem is a vascular tissue that transports soluble organic compounds prepared during photosynthesis from the green parts of the plant to the rest of the plant.
Where are the xylem and phloem located in a leaf?
In leaves, the vascular bundles are located among the spongy mesophyll. The xylem is oriented toward the adaxial surface of the leaf (usually the upper side), and phloem is oriented toward the abaxial surface of the leaf.
How does the location of the xylem and phloem differ in the monocot stem versus the dicot stem?
The arrangement of xylem and phloem is different in dicots than it is in monocots. The xylem is all located in the middle of the dicot root, and bundles of phloem are arranged around it, separated from it by vascular cambium. Monocots do not have vascular cambium.
What are the differences between xylem and phloem tissues?
Xylem is the complex tissue of plants, responsible for transporting water and other nutrients to the plants. Phloem is living tissue, responsible for transporting food and other organic materials.
What is the position of xylem in leaf?
You are right that the xylem is normally nearest to the upper surface of the leaf in a dicotyledonous leaf. However, there are often sclerenchyma fibres on the lower side of the vein (below the phloem), so there is strong tissue on the upper and lower parts of the vein.
Where is xylem found in leaves?
Xylem can be found: in vascular bundles, present in non-woody plants and non-woody parts of woody plants. in secondary xylem, laid down by a meristem called the vascular cambium in woody plants.