15. Answer in Details II

Explain the underground stems.

 

a. Underground stems are stems that grow below the ground to store food. FalseTrue

 

b. CormRhizomeBulbTuber is an underground thick stem with nodes and internodes with scale leaves at the node. It grows horizontallyvertically and has a/ an roundirregulardisc-likespherical shape. They have buds that gives rise to new stem and leaves. Example includes potatocolocasiagarlicginger.

 

c. CormRhizomeBulbTuber is an underground stem that is a condensed form of rhizome. It is irregularrounddisc-likespherical in shape and flat at the top and bottom. They bear one or more buds in the axils of scale leaves. The daughter plants arise from the buds. Example includes colocasiagarlicgingerpotato.

 

d. BulbRhizomeTuberCorm has many dormant buds on its surface known as “eyes”. It is an enlarged,  disc-likeroundsphericalirregular underground stem that stores food. If we plant a part of it with the bud, it grows into a new plant. Example includes garlicgingerpotatocolocasia.

 

e. TuberRhizomeBulbCorm is a condensed stem, stores food in the fleshy leaves, and is roundirregulardisc-likespherical. It has two types of leaves - fleshy and scaly leaves. The upper part of the stem has terminal bud covered with many scaly leaves. Example includes gingergarliccolocasiapotato.