Question

Mimosa plant shows seismonastic movement.
A. True
B. False

Answer 1

Mimosa plant biological name Mimosa pudica and meaning in the Latin pudica stands for shy, bashful or shrinking. That is why it is also known as a sensitive plant, sleepy plant, action plant, touch-me-not, shameplant. It is an annual or perennial flowering plant family Fabaceae and Magnoliopsida.

Complete Answer:
Mimosa plants will shrink by mechanical stimuli such as touching, heating, shaking, and electrical voltage, and the result of this plant can move very fast via motor organs.
This motor organ is known as pulvini which consists of the swollen joints.

These found at three different level:
- Primary pulvinus: joint between a petiole and the stem
- Secondary pulvinus: joins a pinna with a petiole.
- Tertiary pulvino: joins a pinnule and a pinna.

Mechanism of plant stimulation the straight pulvini bends up or down and causes three types of movement that is bending of the petioles, pinnae, and pinnules and this movement of plant is known as seismonastic movement.

So, the correct answer is true.

Note: Mimosa pudica was first detailed by Carl Linnaeus in Species Plantarum in 1753. The seismonastic movement is very fast and seen by eye and speed of the movement is easily measurable.
- The large size of motor organs ease the measurement and movement of the motor organ in only one direction.
- The species is cultivated in South and Central America, Southern United States, South Asia, East Asia and South Africa.