In which of the following are Haustoria or sucking roots found?

Option 4 : Cuscuta

• Sucking roots are also called as haustoria. These are small roots which penetrate the host tissue.
• The haustoria of partial parasite penetrate and make contact with the host xylem tissue since they are in need of water and nutrients.
• Whereas the haustoria of total parasite make contact with the phloem tissue since they are in need of photosynthetic materials.
• Cuscuta is a total stem parasite. It has no leaves.
• Its haustoria penetrate both xylem and phloem. They absorb both water and prepared food from the host plant.