Plant Movements/पादप गतिया

Plant movements are mainly divided in two parts –

1.Movements of Locomotion

2.Movements of Curvature

1. Movements of Locomotion – In this type of movement Plant’s whole body or a part of plant goes from one place to another. In short plant changes its position, is called movements of locomotion.

This type of movements is also divided in two types –

I. Autonomous Movements – This type of movements is induced by internal stimuli. It is divided in 3 parts –

A. Amoeboid - e.g. Gametes of Spirogyra

B. Ciliary - e.g. Gametes of Chlamydomonas

C. Cyclosis –

         a. Rotation – When protoplasm moves around the central vacuole.

          e.g. Hydrilla, Vallisneria

          b. Circulation – When protoplasm moves randomly in cell.

          e.g. Tradescantia

II. Induced or Para tonic Movements – It is induced by External stimuli. It is also divided in 3 types –

A. Chemo-tactic – e.g. Anthaloziades

B. Photo-tactic – e.g. Eye spot in algae

C. Thermo-tactic – e.g. Euglena, Chlamydomonas

2. Movements of Curvature – In this type of movement plant shows movement without changing its position. It is divided in 2 types –

I. Autonomous Movements – Induced by internal Stimuli.

e.g. – Desmodium gyrens (Indian Telegraph Plant)

* Epinasty & Hyponasty movements of leaves or flowers.

Epinasty – growth of upper surface of leaf/flower.

Hyponasty – growth of lower surface of leaf/flower.

II. Induced or Para tonic Movements – It is induced by external stimuli.

Types of Induced movements –

A. Tropic Movements – It is unidirectional movement.

a. Chemo-tropic – movement because of chemical.

e.g. Movement of pollen tube

b. Thigmo-tropic – movement because of touch.

e.g. movement of suckers & hairs of plant

c. Geotropic – movement because of gravitation.

e.g. Root (+), Shoot (-)

d. Phototropic – movement because of light.

e.g. Shoot (+), Root (-)

e. Hydrotropic – movement because of water.

e.g. Root (+), Shoot (-)

f. Trauma-tropic – movement because of loss or wound.

B. Nastic Movements –

a. Seism nasty – movements because of turgor pressure or K⁺ ions.

e.g. Mimosa pudica

b. Thigmonasty – movements because of touch.

e.g. movements of sensors of pitcher plant

c. Chemo-nasty – movements because of chemical.

e.g. pitcher plant

d. Nyctinasty – movements because of day & night.

e.g. movements of leaves and flowers

B.Sc. II Zoology Practical Record Complete Download

B.Sc. II Botany Practical Record Complete Download

B.Sc. II Chemistry Practical Record Complete Download

B.Sc. I Bio Group All Subjects Practical Record Completed Download

Don't walk as you are king, walk as you don't care who the king is .....!!