Question

Which placentation can be observed in Dianthus?

Answer 1

The arrangement of the ovules on the placenta in the ovary is called placentation. There are various types of placentation found like marginal placentation, axile placentation, partial placentation, basal placentation, free-central placentation. The type of placentation varies from plant to plant and species to species but has similar functions to perform.

Complete answer:
Dianthus is an annual flowering herb that belongs to the family of Caryophyllaceae. The genus has around 300 species of flowering plants and is native to Asia and Europe.
Placentation is referred to as the arrangement or placing of placenta and ovules in the ovary. Placenta in botany refers to the highly modified surface of the carpel to which the ovules are attached. It has free-central placentation as ovules are born on the central axis. In this type, the ovules are arranged on the central axis which is not attached with the ovary by any kind of septum. There are several types of placentations found in the plant kingdom:
i. Marginal placentation is seen in pea.
ii. Axileplacentation is seen in lemon.
iii. Partial placentation is seen in mustard.
iv. Basal placentation is seen in marigold.
v. Free central placentation is seen in Dianthus.

Note: The plant Dianthus has ovules attached to the main axis of the placenta. The placenta in plants has a similar function to that of human placenta. It assists in the transfer of nutrients, gases and removal of waste material away from the embryo.