Question

Floral bud tendril is found in
A)Antigonon
B)Similac
C)Rose
D)Bryophyllum

Answer 1

Hint: Tendrils are the specialised aerial modification of leaf, stipule or stem which serve as support for climbing. The tendrils are thread-like slender sensitive organs which coil around the object and cling to it.

Complete answer:
A bud is an elementary stage of leaf and flower. It remains dormant for some time. A floral bud produces flowers. In some plants the floral buds are modified as tendrils. For example-
In plants like Antigonon the inflorescence axis is modified into tendrils. The floral buds arise in the axils of the bracts and the bracts form as tendrils. The terminal of bract- tendrils shows the absence of flowers. In Antigonon there are numerous lateral bracts in which the lower bracts are small and leaf-like and the upper are modified into tendrils.

Similac- It is a herbaceous vine. In Similac the stipules are modified into tendrils which help the plant to climb.
Rose- In roses, the stem is modified into thorns. The thorns help in protecting the plant from the predators. The axillary buds are modified into bulbils for the storage of food.
Bryophyllum- In case of Bryophyllum, the leaves produce adventitious buds in the leaf margin. These adventitious buds have the tendency to develop into new plants. The leaves help in vegetative propagation.

Hence, the correct answer is option (A)

Note: The tendrils are present in the parasitic plant which serves the purpose of attachment and also help in cellular invasion. In case of pea, the terminal leaflets are modified into tendrils. In case of Cucusta. In case of pitcher plant the pitcher, trap is found at the end of the tendril which supports the pitcher plant for growth.