Question

Which of the following is not a feature of the inflorescence seen in soyabean?

• A. Acropetal succession of flowers
• B. Definite growth of peduncle
• C. Racemose
• D. Centripetal opening of flowers

Answer 1

The correct option is B Definite growth of peduncle

Soyabean belongs to the family Fabaceae which has racemose inflorescence. This type of inflorescence is also known as indefinite and indeterminate type as the peduncle's growth is indefinite. Here, the terminal bud will not terminate in a flower. Flowers develop in acropetal succession, i.e., the mature flowers are arranged towards the base and the younger ones towards the peduncle's tip. Flowers open in centripetal succession. i.e., the opening of the flowers proceeds from the periphery to the center of the inflorescence.

In cymose or the definite type of inflorescence, the peduncle terminates in a flower (definite growth of peduncle) and the arrangement of flowers and their opening is basipetal (they open from the centre to the periphery or rather the oldest is found at the tip and the younger ones below).