whole plant body 

or of an organ or of material within 

the plant cell which occur in 

responses to inherent factors, free 

and spontaneous

Examples:

cyclosis (streaming of 

protoplasm), oscillatory movements 

of

Oscillatoria,

Motility of

zoospores.

These movements are brought about by unequal 

growth on different sides of an organ.

These are of the following two types of this 

movement:

Examples: Opening of floral buds and circinately 

coiled leaves are good examples of nastic 

movements.

variations

in the turgidity of cells of an organ.

The best example is Indian telegraph 

plant,

Desmodium

gyrans

, 

where up and 

down

movements

of the two lateral leaflets 

occur in a

rhythmic

manner.

supporting organ in 

spiralling

or 

twinning around the support.

differences in the rate of growth on the two 

opposite surfaces of a plant organ. 

unidirectional external 

stimuli & result in positioning 

of the plant part in the 

direction of the stimulus

which are induced by some 

directional external stimuli

turgor

or changes in 

growth