Question

Starch sheath is another name of

Answer 1

Hint: Starch is the reserve food material in plants. Some plants may have a large number of amyloplasts which are organelles containing starch. These amyloplasts are often seen in large numbers and called as a starch sheath. This is another name for the innermost layer of the cortex in plants as it is most often seen in that location.

Complete answer:
The endodermis consists of a layer of compact cells arranged cylindrically having hydrophobic substances called Casparian strips to restrict the apoplastic flow of water to the inside. These strips vary in width but are generally smaller than the cell wall or the width of the cell on which they are deposited.
It is the boundary between the cortex and the stele.
Sometimes, endodermis also stores starch, owing to the abundant amyloplasts seen in the endodermis layer. Such an endodermis is then called a starch sheath.

Additional Information:
In most seedless vascular plants, it is distinctly visible, immediately outside the vascular cylinder or stele in both shoots and the roots whereas, in most seeded plants, it is not seen in the stems but is present in roots.
The endodermis helps in regulating the movement of the column of water, ions, and hormones in and out of the vascular system.
Water can pass through endodermis only by crossing the membrane of endodermal cells twice.
This allows the plant to control the movement of water to a certain degree and to selectively uptake or prevent the passage of ions and other dissolved molecules.
This prevents gas bubbles from entering the xylem and thus helps prevent embolisms from occurring inside the water column. This endodermis sometimes stores starch and such an endodermis is also known as Starch Sheath.

So, the answer is, ’endodermis’.

Note:
 Endodermis also has cells called Passage cells.
These cells lack the hydrophobic Casparian strips and thus allow free movement in and out of these cells which allows the symplastic pathway.
These cells are less in number as compared to the cells with Casparian strips.