A flower is a modified shoot wherein the shoot apical meristem changes to floral meristem.
Internodes do not elongate and the axis gets condensed. The apex produces different kinds of floral appendages laterally at successive nodes instead of leaves.
When a shoot tip transforms into a flower, it is always solitary.
An inflorescence is a group or cluster of flowers arranged on a stem i.e. on the floral axis.
Depending on whether the apex gets developed into a flower or continues to grow, two major types of inflorescences are defined– racemose and cymose.
Racemose: The main axis continues to grow, the flowers are borne laterally in an acropetal (new flowers are at the apex and older flowers are at the base) succession (Figure 5.7).
Cymose: The main axis terminates in a flower, hence is limited in growth.The flowers are borne in a basipetal (old flowers are at the apex and new flowers are at the base) order (Figure 5.8).
No comments:
Post a Comment