Question

Stamens are syngenesious in
A. Asteraceae
B. Fabaceae
C. Solanaceae
D. Liliaceae

Answer 1

The male reproductive parts of a flower are known as stamens. The stamen are made up of a long slender stalk, the filament, with a two-lobed anther at the tip. The anther is formed with four sac-like structures that are responsible for producing pollen for pollination.

Complete answer:
The flower is the reproductive part of a plant. The flowers consist of some basic parts which are pistil, stamen, petals, and sepals. The pistil or the female reproductive part of the flower is divided into three distinct parts which are the stigma, style, and ovary. While the male reproductive part of the flower is known as Stamen. It is further divided into two parts; anther and filament. Stamen is surrounded by pistils. Here anther generates pollen. Petal and little green sepals are also seen in the flower.
The number and arrangement of stamens, as well as how the anthers release pollen, are very important taxonomic features of flowering plants. The number of stamens can be the same as the number of petals in the flower. The stamens present in a flower are collectively called the androecium.
The term syngenesious means that having the stamens united by the anthers. In a condition where the stamens of the flowers are united then it will be called syngenesious. In this case the stamens are united in edges into a ring like structure as the anthers are composite.
Asteraceae is a very large and widely spread family of flowering plants. This family is also known as Compositae. The family is generally denoted as a composite or sunflower family. In the flowering plants belonging to the Asteraceae family, there are five stamens present. The anthers that exist in the stamen of the flower of this family remain united. In this family, the stamens are attached to the petals. Filaments are also united, which build a tube like structure that surrounds the style. So, as the anthers are united then it can be said that stamens found in the flowering plants of the Asteraceae family are syngenesious.
In the other family such as Fabaceae, Solanaceae, and Liliaceae the stamens are not united i.e. the stamens are free. In Fabaceae, ten stamens with one elongated superior ovary is present. In Solanaceae, stamens are five and epipetalous, long and filamentous and anthers are basifixed. In Liliaceae, stamens are six in number and epipetalous.

Therefore, the correct answer is option A.

Note: The male reproductive part of a flower is known as stamens which is further divided into two parts that are anthers and filaments. When the anthers remain united in the flowers then the stamen is called syngenesious. In the flowering plant of the Asteraceae family, the stamens exist unitedly i.e. stamens are syngenesious.