Question

Axile placentation occurs in
(a)Asteraceae and Fabaceae
(b)Brassicaceae and Solanaceae
(c)Solanaceae and Liliaceae
(d)All of the above

Answer 1

Hint: It is a large family, commonly called a potato family. It shows the presence of a swollen placenta. They have widespread roles in crops as medicinal and herbs. It is a commonly characteristic representative of the monocotyledonous family.

Complete answer:
Placentation is the process in which the formation, type, and arrangement of the placenta. In bicarpellary to multicarpellary the axile placentation is present, syncarpous ovary, the carpels fuse to make septa forming a central axis and ovules are arranged on the axis.
Solanaceae is a financially significant group of blooming plants.
The gynoecium in this family is bicarpellary, syncarpous, the ovary is superior and placentation is seen.
Liliaceae or lily family is a significantly important family of flowering plants. The gynoecium in this family is tricarpellary, a syncarpous, ovary is superior and placentation is seen.

Additional information
The economic significance of certain plants having a place with the Solanaceae family are as per the following:
These are an important source of food. E.g. tomato, brinjal, and potato
These are important sources of spices. E.g. chilly
The leaves of Nicotiana tabacum are a major source of tobacco.
These are also used as ornamental plants. E.g. petunia
Plants like belladonna and ashwagandha also are used as medicinal plants.
The economic significance of the plants having a place with the Liliaceae family are:
Source of Medicine -Aloe vera, Smilax, and Colchicine.
Ornamental Plants -Lilium, tulips, Gloriosa and Ruscus.
Source of food (or) Vegetables-Asparagus.
The flavoring agents used are the bulbs of Allium cepa and the roots of various species of Smilax.

So the correct answer is ‘Solanaceae and Liliaceae’.

Note: Vegetative characters-
- Leaves- mostly basal, alternate, linear,
Floral characters of Liliaceae-
(i) Inflorescence- solitary/cymose ; often umbellate clusters
(ii) Flower- bisexual; actinomorphic
(iii) Perianth- tepals (3+3); valvate aestivation